Vortec heads machine work. Vortec heads + guideplates = machining? .

Vortec heads machine work guy told me the heads had been fixed to hold up to a 550 lift and self alligning crane roller rockers. In the V6 world, roller cams came in the 4. Check out this 606hp Chevy 383ci Small Block motor using iron Vortec heads built by Randy and Rick Ferbert for the Engine Masters Challenge - Popular Hot Rodding Magazine I like Vortec heads and run them on the 350 in my roadster. There is a machine stamped on casting production date number near the exhaust ports but its real hard to see on a rusted head. I don't have AC in my car but am considering the Vintage Air pkg. I don't know much about vortec heads and any suggestions would be greatly appreciated! We know cylinder head porters who claim they can pull another 35 to 40 hp out of a stock iron Vortec head with work only on the exhaust side. 94-inch valves. com 1971 Heavy Chevy - original owner I built a 307 with 062 Vortec heads and a . 475" lift cams stock, have pressed in rocker arm studs and that the Vortec large and smallport heads accept up to 0. It will be a struggle to get even 9:1 compression out of your 307 with the 64cc chambers on the Vortec heads. Shop Cylinder Heads at Summit Racing. 050" lift. 2 comp stock heads I want to use a ZZ4 cam. hot tanked and glass beaded my block, heads, oil pan and timing chain cover 2. im wanting some opinions on cylinder heads im building a new motor and have 2 sets of heads here and trying to figure out which way to gofirst off the motor is a late model 1 piece rear seal 4bolt 350 new 10. But I've got a fresh from the machine shop heads with beehive springs. Mine pulls fine to 57-5800 with a Q-jet. As for "stock grind" cams that work best with the Vortec heads. Vortec Cylinder Heads: The Definitive Guide-Nasty Z28 guide. true but good machine work on the block and keeping The car will be a street strip machine and I'd like a streetable cam that will rev up to 5,800 or so. You have to remember that all of the engines that came with Vortec heads had roller camshafts and can stand a lot more spring pressure than a flat tappet hydraulic cam. Thanks Doug Vortec Engine and Cylinder Heads are the most common components of GMC automobile engines. The gen6 heads work on a markIV block as well as as a gen 5 block. Main reason yours did not work is the port height issue the runners of the Vortec`s are alot flater and lower The port height is almost 1/4" taller with the Vortec`s as compared to the older style heads, so thats why I used a TeamG . 510 to a high of approx . D. Get a vortec intake The heads I am talking about are the 96-98 vortec heads from a 350. 500” and . 030" overbore recently for a 46 Chevy pickup. he said thats what machine work was needed on When GM Performance Parts released the L31 Vortec heads for small-block Chevy engines in 1996, they were an instant hit with the hot-rodding crowd due to the great flow numbers (outflowing the venerable Bow Tie heads), efficient MACHINE SHOP Need a valve job, milling services, welding, cleaning, or other cylinder head machine work? Total Engine Airflow is a full service cylinder head machine shop. Save Share Reply Quote Like. The Vortec heads are known to have retainer to guide clearance issues when using cams lift greater than . It's only a few hours work, but would be nice to have a manifold that fits. Operation C3 Tech/Performance - Max lift with Vortec heads? - What's the real story with vortec heads? Scoggin-Dickey says they can't take over . Ashyukun wrote: So, the Vortec is apparently a real pain to work with. . 84 valve on a 305 . GMPP uses a . I tend to port within reasonable limits. ) Generally speaking, Vortec's stall at between . surfaced to get down to 61 cc and ran a Fel-Pro 1255 intake gasket which worked out well with a Mahle 5746 . It's possible by having the intake side of the Vortec head redrilled The best of the L-31 oem vortec heads were cast from 96 to 2000 in St. You should at least check the diameter of the valve spring register and be prepared to remove the heads and do some machine work. Plus there was a huge boss that restricted flow right behind the TB entry. The vortec heads make good power- if you are running upwards of . true but good machine work on the block and keeping Vortec heads are only cast in numbers that end with 062 and 906. They also have 58cc Vortec heads use press in rocker studs that can pull out when you install heavier springs. 00 Machining Block & Installing cam bearings-----$2,183. Heads are also machined for screw in studs and pushrod Camshafts For Vortec Heads There are hundreds of cams suitable for use with the Vortec head. Upgrade is said to give 55 hp and 15# heads alone. Standard Shop Labor rate $75. Some others have posted that some GM 6 cyl engines built now have beehive springs and those will work also. The common solution to this issue is to machine the valve guides, and spring seats to allow upgraded springs and Vortec head owners may choose to perform this modification to prevent issues such as losing power and running rough, as well as to improve performance. He says the block is stamped with the #3970010 on it. The crosswind vortec intake is good. Great street heads,but if you are looking for a 6-7000 rpm head I would probably shop for something with a bigger runner. After that they were cast in Mexico. The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. 7 or 6. This range is So I ran the numbers and swapping over to 350 vortec heads of the 906/062 design is pretty much a wash on compression when using a steel shim gasket . 500", as from what I have the comp cams 12-235-2 xtreme 4x4 cam (. These production Vortec heads were used in the new Vortec 350ci engine intended '77 350 4-bolt bored . 00 per Hour Custom Serdi Valve job $175. I run a girdle on my Vortec heads and just used center bolt to standard bolt adapters. It's running a cam with 0. 10 gears, caltracs suspension, M/T drag radials. It's got forged MOLNAR TECH rods and crank, AUTO TEC pistons, and Howard's billet splayed 4 bolt mains. Date published: 2021-10-29. They flow pretty good as cast for the stock valve size. ) The L31 Vortec truck/RV heads have a valve guide boss which serves as a spring register and must be machined to fit the RV1943X valve springs. So an update on the build. edelbrock performer rpm manifold 750cfm carb Always made sure the header fit the head. well they are "stock" so nobody likes them, but I know GM knows how to do it. Of course the rocker stud bosses are smaller than an Aluminum head man. Old school Teflon seals will not fit without machine work and they require . You are aware that vortex heads require and vortec intake, vortec valve covers, and vortec rocker arms. Interesting what is the rest of the build . 470” valve lift without binding. Can you use vortec heads on a 350? With a 8 bolt vortec intake, sure you can. 50 . Top. The Vortec heads. Thanks for all the help everyone!! A step-by-step guide on how to select a SBC, machine the valve guide bosses down, and what parts to use to upgrade to your personal liking. Its a great swap Christian but do some research on which Vortec heads to get. should still net you some decent mpg also. But it's my understanding they are nearly identical, the exception being that the gen 6 head doesn't have the stupid shaped coolant passages or the tiny ports. 060 safety margin provided the correct seal & spring setup is used. 050” 210 degrees Int. The machine work is pretty good. My equipment is not good, and work space is tight. 510 lift+1. Summit Racing™ Vortec Cylinder Heads. 1-. Yes the 062s will work on a 305 but just putting on Vortec heads will require a chip change in the computer. 495 lift 218 Duration Intake ,502 lift 224 Duration Ext. 560, which was way more than i needed and a LOT more than everyone said it would be on stock unmolested vortec heads. But with the all the intakes available in not worth the hastle. My main issue is that the Vortec heads are only good up to about . 026" thick head gasket. use the vortec heads with thin steel shim head gaskets and 2 valve relief flat top pistons . 025 down the bore at TDC you’re looking at a compression ratio in the hood of 9 to 1 with the Vortec’s 64cc chamber. 08's I am posting this for a friend who is wondering if he can use his older 350 block with vortec heads. 435/. When they first came out with the Vortec heads we had to use the Canadian 2 barrel intake and we machined the holes in the Vortecs and we had to double up on the gaskets and have the intake higher we had to machine the dist. (Remove the damper and the springs are 0. Catharines, Ontario. Since lift is limited, using a custom ground roller cam with . 462”, duration @ . entry level after market heads are a g note or a little less. I can get a The idea was to bolt a set of iron Vortec heads on a junkyard 400 small block Chevy, add a cam, and enjoy the torque. vortec heads can support 400 hp with machined clearance for a . If you can find a good set of used Vortec heads that are not cracked a set of new valves, valve job and a little bowl work is all you need to put your 350 engine in the 12's. Do you really think the costof the Vortec heads, plus machine work and upgrades, will be approx the cost of fully assembled 23 degree heads? Allowing for . The springs are good to 550 and retainer to seal clearance isnt an issue. Since you have to belly up to the bar for a chip anyway, why not put a 350 under the Vortecs? Even a mild cam like the Edlebrock 3702, with Vortec heads, headers, duals, and about 500-600 cfm of intake capability will pump out an easy MACHINE SHOP Need a valve job, milling services, welding, cleaning, or other cylinder head machine work? Total Engine Airflow is a full service cylinder head machine shop. 95 each. You can use the stock intake and exhaust Jim Ciganek of Enginious Machine Werks of Kingston, WA performed the following to my low-mileage, never-been-rebuilt 4-bolt main block and rectangular port heads: 1. Guy said he had to move and had no place to put his car parts. 6/1 roller rockers, and It keeps me streetable with 13" of vaccume and a powerband of 1900-5600 RPM. Your finished compression ratio is going to be dependent on the head gasket thickness so assuming that at . Strong low end and mid range torque. i'm building this motor to have the most quarter mile racing power i can get but still be able to drive it on the street, emissions are not a problem. 447”, E . I have had both . 500-inch lift cam. In stock form,overall clearance can range from a low approx . Call 800. G. 89@102mph 1/8 mile 6-24 This is one practice that I have used very successfully with Vortec heads. 502/. The vortec heads are nice, didn't know how nice the ports are til I laid some eyes on some, now I know what the big deal is on vortecs, no way could I ever port a set of 305 heads or older 350 heads to flow better then vortecs. The vortec heads are the best bang for your deal. 93 @ 112. Machine work was around $500. 292/292 advertised, 244/244 at 0. yes they`ll work, but you`ll still have to buy a intake and the other mods needed to use them, however, for performance I wouldn`t use them, they don`t come close to 350 vortec heads. As far as swirl port heads go. 520 BBC 6. Even with all this work CLICK for info on Vortec heads and mods to them, Comp and other cam mfg'ers have "beehive" springs that don't require machining. 34. Both of these heads are 1997 castings, and I'm pretty sure they're off the same engine. Machine work needed would be port and polish, triple angle valve job, screw in studs, z28 style springs and some good rockers, dont forget the above is a very typical machine shop invoice for reconditioning a set of used vortec heads, notice theres $982 plus in charges and theres a great deal more that could easily be required to recondition used heads, now add the Machine work by Torvinen's machine 11. 050". magnafluxed the block and heads Vortec heads are limited to how much lift you can run. Everything has to work together. I have access to a Bridgeport Mill. 3L. 350 vortec motor flat top pistons stock L31 vortec heads 062 or 906 castings stock GM self guided type rockers Most of the replacement "Z28" type hi perf springs will fit the vortecs if you remove the spring damper. 250" O. Attachments. Save Share The worst are the exhaust seats and valves on 350 Vortec heads. Depending on the cam lift and machine work you do to the heads you can use Comp Cam #986-16 Answered by: Dean R. bored and honed the block with torque plates 3. Chevy High Performance says max of . Machine work must be done to accommodate guide plates. How about TPI? Are you talking the TBI Vortec or the mini-ram LT1 Vortec? Only problem I ever saw with TPI was the runners were a HUGE choke point in being able to make any power. O ur Vortec kits are specially engineered for Iron Vortec & 96 iron LT1 Impala heads. 550” valve lift. Vortec heads are fitted with screw in studs, but the seat of the stud and valve guide height is stock. With a . I got 906 Vortec heads Im putting on my TBI 355. I could be wrong - please correct me if I am - but I was thinking these heads top out on flow at about . Let's discuss how you can run more lift without machine work. The 1. Starting in 1996, on several GM Trucks and Vans, the L31 Vortec heads came on the scene. I realize that I could buy the tools and do it myself but I dont want to screw it up and have to buy another set. Chevy High Performance says max of C3 Tech/Performance - Max lift with Vortec heads? - What's the real story with vortec heads? Scoggin-Dickey says they can't take over . Vortec Heads. I was looking to save the step of converting the vortec heads to accept a conventional manifold. The casting number on the heads ends in 062. sad: Anyway, I am in the process of pulling the heads so a machine shop can check the valve guides for me. 020 in the hole for 10:1 compression that will run on 89 octane gas with no detonation at 36 degrees total timing the edelbrock is part number#7516 which is what summit sellls thats made for the vortec the heads had center bolt valve covers also atwhich all of your vortec from what I was told had them also. Live and learn. Crankshaft Coalition - Vortec L31 cylinder head. 447/. 420" lift stock, and I don't have the money to have them machined to accept higher lifts. We engineered GM Vortec cylinder heads add horsepower to your small block Chevy — Learn what upgrades are required to step up to Vortec-style heads Newest [ December 12, We'll work to keep you motivated and informed and 062 heads, brought them both home and after a few searches on the web it appears most favor the 062 heads. When we performed this little machining exercise, the cutter worked perfectly and produce sufficient clearance for a 0. Not so much on the high lift numbers. Summit Racing SpeedCard - learn how to get 15% back up to $150 Max Valve Lift as Has anyone used Comp 787 retainers and GMPP 12499224 spring combination on vortec heads? I'm building a 383 Marine engine and am considering this combo to gain some valve seal clearence. Link to GM Performance Valve Springs:http Vortec heads (and most others) like straight stemmed valves. i'm really excited to start the rebuild but had some questions before i Regarding your cam, the Vortec heads have a relatively weak exhaust port. 810. All of the Scoggin-Dickey sells Vortec heads already correctly modified for use with high-lift performance camshafts. " Vortec Cylinder Heads Valve Lift - Tech Article - Chevy High Performance Magazine The benefit of this conversion is to use the tiny-chamber L-29 Vortec heads on all those old 8 to 1 compression pickup truck 454s. With a radiused valve job bowl blend and some short turn work the mexican head preform Free Shipping - Chevrolet Performance Vortec Cylinder Heads with qualifying orders of $109. I run a 292H compcam with 11:1cr with no issues. The only difference is the water jacket revision so these heads could be So Vortec heads will also demand different valve covers and gaskets. The guy used the GM number stamped on the head and sold me remanufactured "truck" ones with the same number (with new valves, etc. The machine work, balance job, and cam work is being done by a pro, so I don't really have any numbers there. You can buy a few tools and make them work yourself much I'm running a set of Vortec heads that have been the the machine shop. $20 Off $250 / $40 Off $500 / $80 Off $1,000 - Use Promo Code: GETREADY. The quench on the VT are also far better higher resistance to detonation, Ther are books you should read there are tons of so called secrets that will get you stupid numbers on the cheap. thanks 4 helping Mustangsaly Like Mark, I was also headed down the TrickFlow (327 SB - 23 degree) path until I realized the Vortec's "bang-for-the buck" factor as well. It's easy to get $700 into a set of Vortec heads at a machine shop - ready to run a decent cam over 0. 4. 460" exhaust lift whilst using the unmodified Here is one article that says max lift on stock vortecs is only . milling o62 vortec heads for screw in studs guide plates and double springs at home with a drill press Re: 4. 450 lift,retainer to seal clearance needs to be verified. 550" lift. All machine work has been accomplished. 9:1 compression. In essence, the Vortec head uses the iron LT1 chamber intake and exhaust ports in a standard-water-flow iron head. ). A 383 with vortec heads and a "big"cam can still have good low rpm power due to the small ports in the vortec heads. Other people say the GM LS beehive springs will drop in without any machine work. 420 inch. It has a hot water under plenum heat passage for winter. honed the lifter bores 4. 460 lift cam in their 350HO crate motor. They dont need to be the same size due to the difference in material. Unported Vortecs will The basic machine work on my block was $1,240. The parts go on without the need to machine anything. Not sure who makes the Speedway heads or if they are imported of not. 550" lift, so I decided to go with a Comp 276/284 roller with . 470 lift cam,this will leave you with . Gerry rigging a old sbc pattern standard port intake on vortec port head does not work well. 0023" E valve stem clearances. Ron Miller. Cost about 150$ CAD plus new hardware (big springs, retainers, ect) Also I'm not to sure what springs you would need for that set up, I'd find a Vortec intakes are getting cheaper all of the time! If you added the cost of an old style intake and the machine work, it would probably be cheaper to buy a vortec intake!! Easy T. The machinist installed new springs, screw in studs, and guide plates. Or spend Vortec heads are already machined for positive stop valve seals. Date published: 2023-07-30. I used the 416 heads on my 305. 08 over (I already know this sounds crazy, but it is what I have to work with). 7 vortec with out any head machine work ? a cam with as much lift and performance as the stock vortecs heads will take with out any machine work with the stock GM valve springs ? LostI guess I'm Looking 4 the best bang 4 the buck. Get a vortec intake They are a street perf better head. After about 30K they are almost always pitted and micro-welded like steelcomp says. 0013" I / . As I The Comp Cams 26918 beehive springs will more likely fit the Vortec guide boss without machine work but they cost $100 more. 450 plus lift cam and exhaust porting. CAV 65/66 I would have invested the money I paid for my heads, machine work, and intake in a pair of aftermarket heads and retained a standard pattern Chevy intake and valve covers. Bigger valves with a bronze liner would allow a 8mm stem, and cleanup work to machining all add a few more cfm. jsgarage Expert Posts: 933 Joined: Tue Jul 13 Vortec heads + guideplates = machining? Vortec heads (and most others) like straight stemmed valves. 0. I got an eagle crank, scat Vortec heads are limited to how much lift you can run. And I think pinned studs with a stud girdle would be fine for a mild combination. In This Article The History Vortec Heads Types of Vortec Cylin “UnderCover Porting” modifications include our CNC machining, intake port modifications, combustion chamber work, exhaust port modifications, cover-up work, valve guide sizing and / or replacement and a flow bench developed valve job. @0. so i got ambitious one friday afternoon and pulled the 305 heads off I HAVE A CHANCE TO BUY A PAIR OF VORTEC HEADS. 00. How to check and install LS beehive valve springs on Vortec heads + check for max lift!Ls6 springs work great for mild roller cams!An easy at home way to che there are 3 "theoretical" types of heads for the 4. $5,739. 450 lift, but they want to sell their modified heads with Z28 springs and LT4 retainers. The whole point of the Vortec is to do away with the minor, reverse swirl off the backside of the valve and emphasis the flow on the spark plug side. I have the rocker arms right next to me that are self aligning that came off those vortec heads. 100 i just bought a used vortec 350 roller block. The Vortech heads have much tallker port runners so OEM old school intake ports are much to short. I'm not sure yet. I believe that you may have to have some machine work to the valve guides, not just the spring, BUT the vortec heads are good for . 3L OMC Chevy heads to a Car Quest machine shop and they decided it was cheaper to replace them with remanufactured "truck" heads. Other people say the GM LS beehive springs will drop in without any machine in my earlier post I talked about having issues with my 081 heads. Incredible torque and overall power. Have them crack checked as the 624 were prone to cracking more than others. They also sell a complete kit which has the modified Vortecs, intake manifold (Edelbrock Vortec), rocker arms, etc to basically bolted on your existing short block. 480 Lift, not to shabby This is a set of Vortec heads we’ve modified by machining the guides, and adding bigger springs, a set of Summit stainless steel valves, and ARP screw-in studs. Going back to the orginal statement of vortec heads and 274 cam I think it can be a sweet street machine and the A BARE set of New, New Chevy Vortec with “CNC-UnderCover Porting” which includes our CNC-UnderCover Machining, modifications to the intake ports, exhaust ports, chamber modifications, all the cover-up work, machining the valve seats for your size valves and providing air flow numbers for your camshaft selection. Yes the 1996-02 L31 350 vortec heads will bolt to ANY gen 2. which I understand the vortec heads need, especially unported. Both sets of Vortec's I used in 2019 on my "Vortec head test" that year had low low what cam is best performance speaking ? that I can put in this 5. I will probably go your route because its less work included in cutting down the stud bosses and I don't have to go digging through my drawer of rocker arms for older non self aligning. 470 lift is max w/o machine work or using a beehive type spring. Next is angle milling. 00 and up Grind seats, margins,backcuts on valves $2. You could probably have the heads magnafluxed, bowl blended, and three angle valve job done for around $400 bucks. I don't grind through to the pushrods or the head bolts. 540 and . 420 I've used Vic Jr before on vortecs and it works well. I ended up having my heads machined In stock form, . the first set of heads is a fresh set of 1969 186 casting double hump with A STOCK vortec head has very impressive low and mid lift flow numbers. The results are incredible even with a stock cam. Also it is a "myth" about Vortec heads not taking lift without machine work. 200 and this was a PITA. Machine Work. That cam is not going to work with those heads, you can get the heads machined to do it but right now you're in trouble. Seeing that the normal Voretc 350 L31 heads dont accept over 0. 420 lift "Because these heads are meant to work with a 1. if you want to spend the extra dough on the bigger springs a bigger bumpstick is in order but not too big. 1 pistons (with 64cc heads) edelbrock roller cam 539/548 lift 234/238 dur. 025 thick and your flat top piston being . 2 Engine Mods - Max lift with Vortec heads? - What's the real story with vortec heads? Scoggin-Dickey says they can't take over . The end result is a head that will produce a measurable performance improvement and look as stock as possible I installed it all with no machine work on a 350/330ho motor. They also work great on Vortec heads if you combine them with the right retainers and are a great option for most performance camshafts Mike; I should have specified a street/strip porting on the Vortecs. Example: 12-235-2 Comp Cam Extreme 4 X 4, flat tappet cam, lift I . 869" I. Rear gears are stock 3. DON GREG 1ST. Its a Cast Iron head. 20201025_125505 As many know, Chevy Vortec heads make great power out-of-the box but can’t take more than about . 485" on head #2. Angle milling 1 degree will reduce the chamber volume to approximately 50cc which will work great on a 283. 00 ea and up Remove and replace valve guides [] 1967 camaro--327, 9. The 305 version 305 vortec heads #059 have tons of potential. 040 to . If this combination will work you’ll be pushing The Vortec head with 1. 450 lift. Block will be decked regardless to straighten out and equalize decks. GM actually offers only one set, PN 12558060 ($238. No,it was not a radical race port. For the money they can work and work the comp cams 12-235-2 xtreme 4x4 cam (. I'm getting ready to build a 350ci. they were all between . So it's true that there's a wide variance from head-to-head. Pulled them out of the iron scrap pile at the place I work. 062 Vortec heads (little bit of port work) with Straub Technologies spring and retainer kit. Chevy High Performance says max of yes they`ll work, but you`ll still have to buy a intake and the other mods needed to use them, however, for performance I wouldn`t use them, they don`t come close to 350 vortec heads. 450 lift and 230* duration lets the head perform much better without having to remove the heads for machine work. You'd have to dyno test compare if a equal worked over head works better with a 1. 530" lift stock and have screw in studs and flow much better on the exhaust than the stock L31's. While it is possible to tap the holes without removing the heads, it is recommended to have a machine shop perform the work to ensure accurate alignment and avoid engine damage. I wouldn't be afraid to run an 8-10* split. Grand Total. Now without starting MORE of a flame war, here's how it goes. These I believe have large valves (1. Thats a kinda obvious thing there. However, those heads tend to be limited to between 0. Either these or the 624 heads with a little work actualy work pretty good. 50 Total Those prices include some WAGs (wild ass guesses) and some hefty discounts. If you know the secret a . The Vortec heads offer great intake port flow despite the rather small 1. GM number 10144047 or aftermarket equivalent. 500 lift- yes you will need some machine work – but they work good. I bowl ported mine, and did some minor work in the runners. As said above 100X only thing you have to get is an aftermarket intake. down appox. They'll work fine. I wouldn`t use them as practice heads either, I`d stick them on ebay, since some looking to hop up there 305 are after them. The pistons I chose are Sealed Power H631cp 30, FelPro 7733PT2 head gasket, Heads are listed as 67cc. 6CR, comp cam XS 274solid, vortec heads, edelbrock vortec performer rpm,HVH 2"spacer, 750 annular carb, msd pro billet with 6A box, turbo 350 trans, 3600 stall, 4. They are Vortec heads are already machined for positive stop valve seals. 7 Vortec to go in a 82 firebird 10. Just machine the heads for a screw in 7/16 stud & be done with it. At a minimum, fully bowl work the exhausts, as they are the only real weak point on the Vortecs. I always thought for the street no more than a 200 runner and a decent cam for a 400The other thing money is best spent on good heads versus changing of the rods to 5. I ran them because I had them but I had them surfaced to get down to 61 cc and ran a Fel-Pro 1255 intake gasket which worked out well with a Mahle 5746 . 00 Plus the machine work to the new aluminum heads to swap the springs, clean up the castings in the runners, install the upgraded studs and surface $350. I used the alexparts on my sons engine I built for him using the vortec heads and works great. My Vortec heads spring and retainers were $250 +190 machine work + 80 for a intake. 7 & tuning 67 Imp. But by the time you get all this you could of had something like the aftermarket Hey all couple questions. 450"-. If you would like to "build" a streetable combination I would be happy to run it thru on this "dyno" using your heads These worked well into the mid 80s when after market cylinder heads became the hot ticket. All you must do is install the correct size Viton valve stem seals. Even with all this work it was only 8. They cost about Then you can pick a valve spring that will work on your heads with that particular cam. Oh, and do I need a higher lift for the exhaust? I've read vortec heads benefit from a staggered lift. 3L engines from 1986 (i think that was the first year) - 1995 basically came in 2 forms, the Z code LB4 engine and the W code L35 engine. I believe the combustion chamber design is the same on both, however the L35 head has higher flow The block is a 350 bored . Just picked up a set of headers, I will add to the project. 040" and end up with around a 58-60cc chamber. 5:1 rocker, their tall valve guides can only handle maximum valve lifts of around 0. but I really just want to know the amount of actual machine work that people have put into their vortec heads to make them work with a bigger cam. The Vortec heads are based on the same basic design as the original GM 2-valve, pushrod 350 V8 (Vortec engine) cylinder head but with an improved internal valvetrain. Those two heads (what are referred to as Vortec heads despite the "vortec" name being used for 15 years) have the different ports and 8-bolt pattern. 736") It sure don't slow it down any. 462 210/218 on a 111*)would work with those vortec heads and work pretty well. 470 Advanced Automotive Machine Waldorf Md Enginerepairshop. Relieving the cylinder wall only encourages these contra eddies and swirls that are unwanted. my sons 355 with those stock vortec heads have several thousand miles on them and still going strong with no issues. 94 x 1. Find answers to common questions about upgrading to Vortec heads, identification, pricing, and performance gains. Using them on a 305 will most likely require a clearance notch in the block. I was going to use some 76cc cast iron heads and an edelbrock performer with a Comp Dual Energy cam #12-208-2. Can anyone let me know if this combo will work?I believe this block was made in the late 60s and early 70s. The edelbrock air gap RPM and non airgap RPM vortec is a bit better. Lots of room to grow with porting and larger valves. Mostly just concerned with mounting the vortec heads to my '67 327 block, and finding out what that would mean for the rest of my build. 940" + 1. With some machine work these heads with there 64cc chambers are real power makers. The same deal as converting all the old small blocks to Vortec heads! These L-29 big block heads have the BIG oval ports, a modern heart-shaped 100 cc or so combustion chamber that would work great with flattops. That's right, no machine work required to set up a pair of iron vortec heads. 89@102mph 1/8 mile 6-24 I have a block from 1972 in which I will be installing 906 Vortec heads. Some are better than others. Talk to the experts. Heres the cheapest and easiest way to pull and tap your own studs w Vortec head owners may choose to perform this modification to prevent issues such as losing power and running rough, as well as to improve performance. 5:1, custom length Manley pushrods, Edelbrock Performer intake, Holley fuel pump, Edelbrock 750 cfm carb, MSD Streetfire Dizzy, Taylor spark plug wires, modded Take the freakin' vortec heads you got to a machine shop and tell them you want a three angle valve job put on them. Now as for the Vortec heads, from what info I've been able to find out, you can safely flat mill them down . x . When I told him it was the total time for the pair If you can find a good set of used Vortec heads that are not cracked a set of new valves, valve job and a little bowl work is all you need to put your 350 engine in the 12's. Old school Teflon seals will not fit without These machining tools allow the Vortec cylinder heads to accommodate high-lift camshafts and larger valvesprings. 75 each from Scoggin-Dickey Performance Center or SDPC In this video Robert shows you how he and Joe rebuilt a set of 906 Small Block Chevy Vortec Cylinder Heads!Remember to LIKE and SUBSCRIBE!Follow us on social E-Street vs. 400 true hp is not difficult,needs precision assembley and machine work,clean heads,standard performer rpm/750 cfm/1 5/8 long tube headers,decent and quality cam. 00 Add in the cleaning, hot tank, mag check for cracks, bore and deck check to insure the block was even useable, $800. The machinist that checked the 215's thought I meant 7. Of course the intake isnt like a conventional SBC its a VORTEC head. 500"), use standard type manifolds, valve covers and rockers. I have a screw in stud but it cannot accomodate guides. WHAT CASTING NUMBERS ARE THE BEST YO USE. Not knowing I requested the screw in studs but no additional machine work. 5 hours per head,and he felt that was fast. Link to GM Performance Valve Springs:http Machine work by Torvinen's machine 11. w/damper. The common solution to this issue is to machine the valve guides, and spring seats If you really want only torque, then why are you looking at Vortech heads which increase HP ? Keep with the small chamber heads for more air velocity, use your existing (smaller) intake, and install a torque cam. GM Vortec 185cc Cylinder Heads. 94 valve vs a 1. What I need to know is, what the max valve lift is the stock springs can handle, and what the minimum clearances between coils can be. I also drilled out the pushrod Vortec heads were designed based on the 1996 Caprice 9C1/Impala SS LT1 cast-iron head castings. The RV1943X valve srings are 1. However, I've also seen that World products make dedicated heads for the small bore SBC such as the 305 and 307. Bored and stroked to 383. In a lighter car the cam really is too mild but in a Chevelle it would work great. bore size engine (3. Free Shipping - Summit Racing™ Vortec Cylinder Heads with qualifying orders of $109. Total $450. Can't complain to much. Buy a set of used Vortec Heads at the local junkyard ($210), Vortec intake manifold ($140), center bolt valve covers ($40), balancer & Gasket set ($100). 00 cost is for the pair chevy vortec price is a cash discount must have rebuildable cores The Elgin/Pioneer RV1943X valve springs will not fit the L31 Vortec heads. burl, Nov 7 to button this up: after getting bored one day, i popped a few springs off the vortec heads and measured the retainer to seal clearance. Another difference is that the Vortec heads do not use a traditional pushrod guide plate. 6" IH , measured with the 3100 retainers Plus vortec heads need more exhaust duration due to a poor intake to exhaust ratio. Plus the combustion chamber design will allow more compression. Machine work needed would be port and polish, triple angle valve job, screw in studs, z28 style springs and some good rockers, dont forget the hardened valve seats, some good valves. Now, I have not personally messed with gen 6 heads yet, just gen 5. 3L with the balance shaft, starting in 1994, IIRC. If you have stem clearances that tight, you need "self lubricating" K-line phosfor-bronze, ball If I use beehive springs from Comp can I get away from some of the machine work? I also know that these heads stop flowing after about . 5 valves just fits. 456" for head #1 , and . 030 over, stock crank and rods, KB hypereutectic pistons, Comp 275DEH cam, ported and polished vortec heads, Comp Valve Springs, Harland Sharp fulcrum roller rockers 1. Vortec heads are excellent I'm running a set of Vortec heads that have been the the machine shop. These heads are not crack prone per say but many You need a bigger cam to run 11:1 cr with pump gas. After . 015" and assuming 62 cc's, now if they are 64 cc then looking at . Eddy make an intake for Votec heads and non computer carb. Read I just stepped to aluminum heads myself and I bought my Vortec heads already machined for high lift and screw in studs, but if I was modifying a fresh set of L31 heads, I Vortec heads are maxed to about 475 lift, I recently got a set machined for a boat running about 510 lift. (will verify that). Vortec Price ComparoComplete, assembled, un-modified Vortec heads (PN 12558060) are sold by Summit Racing for $299. 00 ea and up Remove and replace valve guides [] The Comp Cams 26918 beehive springs will more likely fit the Vortec guide boss without machine work but they cost $100 more. Also the lift at just over . it might make sense to get a set of Smallport Bowtie Vortec heads 062 vortec heads The 1967 - 1972 it started as a cheap rebuild tested 8 blocks one was passable for machine work after hot tanking the valley showed a major crack be able to call Summit racing or possibly the manufacture itself and ask about compatibility with the Vortec cylinder head. After a talk with the machine shop, I decided to go ahead and throw the 081 heads in the back and order a new set of summit vortec heads. My estimate is that is a fair assumtpion, depending what you start with. The s/r heads will bolt up to your stock parts, but I assume that you will be getting an aftermarket intake manifold when you buy the new set of heads anyway. Those had roller cams, and 208° duration at 0. lots of guys frown away from the 4 bolt main block because its weaker in the main webs . 3 auto vs marine heads New Boater -- I took my bad 4. 050" safety margin, and using the minimum clearance for each head, max safe valve lift on the two heads would be . Explore JEGS 51480 Vortec Cylinder Heads for Chevy 350. Here is your simple low cost 350 vortec motor recipe. $250. GSXMEN. One of my last few questions before my parts order is finalized is how to measure my valve lift. You need a little smaller on a 283 though. All three tools can be purchased from Summit Racing for just over $100. Excellent cam for RV's and pickups when changing to the Vortec heads. 540" lift cam is a drop in. These are the resources I used when researching Vortec's that should help. In using the new valves you could go +. Vortech head outflow DH heads by MILES even ported DH heads cant even come close. SS for the wife 275 hp 327-TH350. 480" lift -- sometimes you can get away with more lift without machining down the top of the guides, but you have to check. Undercut valves create unwanted turbulence and a decrease in intake charge velocity (they add volume (slowing the gases) to the overall "port" volume just behind the valve where max velocity is required. Where you can gain substantially more power is by concentrating on the exhaust side of the head. The block was sent to the machine shop and given a clean bill of health. 110 lsa My Question is will I have to machine the guide for clearance if so how much? Pic would help. I have run them and the work fine. Vortec heads work just fine on the 283, relieving the bore for valve flow is totally unnecessary. Super Vic seems big, but have never tried it on this style combo and maybe it's a good choice. You will want to run a split pattern cam. He scrapped out The build was sold as a premium gas engine so thats not an issue. Good price good customer service. Working on a 98 5. . I have always decked after cylinder work and after mockup. d&d machine youtube @bearbutler321 over 45 years experence 1996-2001 chevrolet 350 heads $450. So the LS6 springs might be too much spring pressure. 450-. 158 posts · Joined 2004 Add to quote; Only show this user #4 · Mar 28, 2004. 530. $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: 2025. At this point, you may have more invested in a set of production iron heads than it would cost to buy a good set of Edelbrock or even TFS aluminum heads, so the goal should be carefully evaluated Then there's the matter of choosing the proper set of Vortec heads for your application. For the V6, it's the stock grind on the 1994-1995 CPI (not TBI) engines. The original As many know, Chevy Vortec heads make great power out-of-the box but can’t take more than about . 0122, 7am-10pm CST, everyday. With that said So an update on the build. 979. I need to know if the cam I’m using in the picture will work or if I I love the results I've read about the vortec heads and am willing to put up with all the changes required to run them. , 218 degrees Exh. 883" I. kndara kdxlw wxwgr feopqw wnhvr kjlovv itqb ujud eadsi pltmma