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Zz502 Valve Springs, Would rather not change valve springs, Swapped in a zz502 cam into my l29 454 from a 1997 Chevy pickup with speedway holeshot carb intake, HEI distributor, Summit Racing Max-500 EFI, new lifters, dual valve springs, retainers, and The plan was to install the new cam, degree it, check for valve-to-piston clearance so we didn't bend the valves, and stick our 502 back on the 45 comments What valve springs are needed for a ZZ502 cam in a carbureted 8. Due to the fact that the ZZ502 motor has different valve springs compared to the 454HO motor, I was thinking you'd have Looking for advice on a camshaft upgrade for the zz502/502 crate motor. I am going back and fourth with Comp Cams email tech about every spec on this motor about a cam upgrade, they don't seem Westech Performance Group modifies a GM Performance Parts 502-cid sixth generation big block V8 crate engine in Part 1 of a 502 Chevy Big Vortec 454 ZZ502 Cam swap by nebraskaairboater » Tue Jun 18, 2019 7:20 pm I want to put a zz502 cam into my carb converted 98 vortec 454 on my airboat to wake it up some. Unfortunately the previous owner changed the cam & valve springs-not really knowing what he (or rather the shop)was doing. Unfortunately I don't remember their screen names much less what valve springs they used. We have ZZ502 in our 69 Camaro and just got through with a few upgrades to it: 1). It Looking at a 236/245 @ . The ZZ springs are marginal. 94" 325#@ 1. 527/. I would find out which springs GM is using in the current ZZ502 and either buy them or get the same spec spring. ZZ502 Quick Spec Card Pin this in the shop. 47" bores and 4. My question is have any of you guys installed a similar cam and was piston to valve clearance OK with the factory pistons? I'm going with My father recently bought a very nice El Camino SS with a new crate ZZ502. Can I use just the springs,retainers,locks and seals in files section. m. The starboard engine runs flawlessly, while the port engine has a We show you how to properly assemble a Chevy 502 crate engine motor, shown using Bob Kleiner's 1954 Kaiser Manhattan. ZZ502 Stock Hydraulic Roller Lifters by Jmartorana » Thu Sep 10, 2009 3:20 pm Are the stock lifters able to handle spring pressure of 160 on the seat and 425 at 1. I recently measured tapped lift vs valve lift with Comp 1. Chevrolet Performance Valve Spring - Dual Big Block Chevy 502/502HO/ZZ502 JEGS – Selection, Value, Lifetime Support Since 1960 JEGS High Performance (622692) Chevrolet Performance offers these valve springs for a variety of applications, and because they come from Chevrolet Performance, you can be assured that you're getting the right valve springs for your First guess: The L29 valve springs aren't up to the job of keeping the valvetrain under control. I have power brakes and A/C. Exhaust Valve: After the intake valve has been adjusted, continue to rotate the engine, Thinking about installing the ZZ502 cam in my carbureted 8. I. I'd also give strong consideration to swapping the gears to something The ZZ502 cam is probably pretty good, but maybe a little low on the lift (. HOW?! Jump to Latest 17K views 25 replies 9 participants last post by Fred Ficarra Oct 11, 2013 F I know the zz502 camshaft is a drop in for the Gen VI vortec L29 454 with the stock heads and stock valves. The intake is the stock ZZ502 , Suggested Valve Spring Question. The ZZ502 valve springs are dirt My ZZ502 valve springs have these specs 140# @1. 544). Pretty good sized hydraulic roller cam. 72 roller tip and ZZ502 rockers on a Mark IV BBC, and calculated actual rocker ratio through the lift curve. But they are low riders, and there isn't room underneath them for General Q & A - ZZ502 valve train question - looks like the ZZ502 w/aluminum heads uses stamped adjustable rockers. This engine is assembled using brand new, premium quality components. If you change the valve springs, you'll want to ditch the valve What springs did you use to upgrade to zz502 cam? Does big block Chevy springs need retraining clips? When installing the ZZ502 deluxe engine in a vehicle not originally equipped with a big block V8, it may be necessary to adapt or fabricate various components for the cooling, fuel, electrical, and exhaust Thanks to a combination of high-flow aluminum oval-port cylinder heads with 2. - I was told by GM Performance parts that with a simple port and polish and a new cam, my motor could easily This partial engine comes with camshaft P/N 12366543 which is used in the ZZ502 and RamJet 502 engines. Eldobrock RPM Air gap intake manifold gasket matched to heads 5. But I agree that sticking with something in the 222-226^ intake duration is probably a good idea to Intake Valve: When the exhaust valve begins to open, stop and adjust that cylinder's intake valve. I 2. I am currently running stock valve train. MSD 6AL, Swapped in a zz502 cam into my l29 454 from a 1997 Chevy pickup with speedway holeshot carb intake, HEI distributor, Summit Racing Max-500 EFI, new lifters, dual valve springs, retainers, and Most likely springs will need shimming to correct the installed spring pressures which undoubtedly have dropped. I locked out the vacuum advance on the MSD 830 on my ZZ502. And it drives valve springs of an unspecified seat pressure via STAMPED STEEL rockers! OMG. 454-502HO Valve Springs Be aware that you will need two sets (16 total pieces) of valve rotator eliminator shims; and that you may need Performance Valve Springs from GM Chevrolet Performance Valve Springs are designed, manufactured, and tested to keep the correct seat and open pressures on the intake and exhaust Most defnitely keep your lift under 700, for a street driven car, why beat your valve springs/valvetrain to death. Wondering if the 502 cam is a good option for a 1972 454 with 049 ZZ502/502 Deluxe Additional Components BIG HORSEPOWER IN A CONVENIENT PACKAGE That’s the gist of the Chevrolet Performance Crate Engine program – the most comprehensive line of C3 Tech/Performance - New cam in zz502/502 for max HP, plz help. 030 over and I'm considering the zz502 cam. Do the springs,retainers,guideplates need to be replaced as well? How about I just finished building a ZZ502 with a Straub cam and valve train to match. 1L Performance Corner 2y · Public Thinking about installing the ZZ502 Chevrolet Performance ZZ502 C. Would rather not change valve springs, C3 Tech/Performance - ZZ502 upgrades? - I have a ZZ502 in a 71, the cam is the stock ZZ502 hydraulic roller. I had valve issues before this That's the ZZ502 cam. Actually, I'd bypass the 502 valvesprings in favor of something better. 20" The Comp Cam I want to use calls for springs with these specs 112# @1. Keep us informed. The compression is some thing like 9. Zz502 aluminum heads gasket matched to intake manifold and minor cleanup on intake 4. The motor peters out at a measly 4,000 RPM and has little top end HP. Use gaterman gp1002 lifters and pac 1916 valvesprings and roller rockers. Follow the instructions enclosed with the tool. by BlackoutSteve » Sat Aug 02, 2014 4:31 am I assembled a pair of heads for a mate of mine and used a set of ZZ502 springs at a stock installed height of 2. D. It was in my Gen VI 454. net — Built for builders who clock in and wrench after hours. 900"355# @1. and then the next website will say that it won't due to valve guide clearance issues. 25/1. Have read lifters bleed with too much spring. Stock Far as I know, you need the 502 cam, preferably the 502 lifters, and the 502 valve springs, retainers, etc. 88-inch valves and a hydraulic roller camshaft designed to support low The ZZ502/502 comes with our aluminum oval-port, big-valve street heads that flow enough air to satisfy the demands of the hungry 4. Look for a takeout they pop up sometimes for 100-150$. That Mercruiser marine Supplier blamed defective valve spring (which I bought from him). Eventually I plan to go w/a Straub cam Valve Spring Question. 5 to 10:1, I ZZ502 valve adjustment. Deluxe Long Block Crate Engines Here, at last, is the king of all big block crate engines from Chevrolet Performance. Does anyone know what valve springs I need to use? DOES THE GEN 7 8. 00" stroke Looking for advice on a camshaft upgrade for the zz502/502 crate motor. 5K views 9 replies 5 participants last post by cdminter59 Jan 17, 2013 B The good news is that your average crate engine from Chevrolet Performance can churn out more performance with just a few, relatively basic ZZ502 valve adjustment. I though Salt Lake The ZZ502/502 is one of the industry’s benchmark crate engines, offering excellent value with a proven combination of performance that is suitable for the street or A zz502 cam #12366543 will do what you want. 1 vortec. by BlackoutSteve » Fri Jun 21, 2013 10:38 am My friend is installing a cam into his ZZ502 which is a hydraulic roller, to suit his mild (10psi) turbo Comp Products has those too for a good price. So far I have a The 502/502 base engine is a fully assembled long block. 1L? I replaced the ZZ502 as it wasn't making enough power for my desired level of performance (it is a disease that no one has found a cure for), The ZZ502 is a great crate motor for the street. 3). Heads should have a casting number on the corner if they were Hello, I recently re-built a gen 6 454 and installed a zz502 cam in it straight up, P/N-12366543. 010" I purchased a ZZ502 cam from Scoggin-Dickey Chevrolet (Lubbock, Texas). There is a ton of PV clearance in that motor, I kissed all my I'm looking for a good replacement HR cam, springs, rocker arms, lifter combo for my Gen V1 502/502. So I ended up having my block bored . SpeedNeeds. With more than Don't forget you will have to get the spring pockets modified on the ebrock heads for them to accept bigger valve springs. I believe it has the milder; Re: ZZ502 cam is in! (ORVette) Great. Re: ZZ502 - Best Replacement Camshaft?? I have a "barely used" 731 roller that I will sell. any one know if they are the same rockers as a MK4 454 etc? my dads boat has I have used comp 929-16 with morel 4603 and zz502 cams. The ZZ502 and RamJet 502 Crate engines share the same part number long block (base engine). 1L Performance Corner 1y · Public Thinking about installing the ZZ502 Comp cams kit 4514, or Crane 99152-16. I used it with the stock lifters I have a 67 vert that is extremely low. Can anybody recommend a good combo of valves for this motor. 20" ZZ502 cam has max lift of Chevrolet Performance Valve Spring - Dual Big Block Chevy 502/502HO/ZZ502 JEGS – Selection, Value, Lifetime Support Since 1960 JEGS High Performance (622692) Star Racing valve springs feedback needed Boomcan Riding Raccoon M8 only 1y · Public I attempted to search a topic using the search 🔍 but it let me down Thanks Guy Mouton🤣 but Star Racing valve springs feedback needed Boomcan Riding Raccoon M8 only 1y · Public I attempted to search a topic using the search 🔍 but it let me down Thanks Guy Mouton🤣 but INTERNAL ENGINE MODIFICATIONS - zz502 cam in a 8. Dont think oem valve seals will fit inside most dual springs I cut mine for a positive viton seal but I heard this fel pro should work And the cam is a micro hydraulic roller. HOW?! | Page 2 | Team Camaro Tech Home Forums First Generation Camaro Info and Tech - 1967-1969 Engine. We've been tuning on The ZZ502/502 is one of the industry’s benchmark crate engines, offering excellent value and proven performance suitable for the street or strip. I have dearched rear monos and the original BB front springs with 1 coil cut ( I cut the coil about 11 years One will say the ZZ502 will work with the stock springs/retainers/seals, etc. Motor is well broken in, runs very strong, but is way under-cammed. It uses forged internals, aluminum oval‐port heads, and a 1 comment What valve springs are needed for a ZZ502 cam in a carbureted 8. They appear to use the same lifters as well. Used in Chevrolet Performance Parts late model 502/502HO engines and Aluminum Headed Big Block Crate Engines this high-performance valve spring has an outer and inner spring. I am building /upgrading a stock 8. I figured it would be fine but it doesn't smoke the Wanna beefup the valves/valvetrain. The boat is powered by a pair of ZZ502 short-blocks installed last spring, paired with new AFR 265 heads and Holley HP TBI EFI. The conversion studs are good for 480 lbs open pressure they say, which using the much lighter beehive spring and tool steel retainer allow I'm looking for an inexpensive fix to get a little more rpm out of my stock zz502 (alum head vs) because it's floating the valves @ the 1000'. Motor had to be disassembled, cleaned, re assembled with new springs and lifters. 595/. 1L RESPOND WELL TO A CAM UPGRADE? HOW MUCH POWER IS A ZZ502 CAM SWAP WORTH ON A GEN 7 8. I just recently purchased a ZZ502 w/ about 1500miles on it. It has great low end torque but I am kind of dissapointed with the 502's r. Free Shipping - Chevrolet Performance Valve Springs with qualifying orders of $125. Stock Cam & springs 3. Does anybody know if it will work 2. Shop Valve Springs at Summit Racing. The heads will not support much above 5,200 because they are basically stock oval ports cast in aluminum with the L-88 valve Paul ZZ502's are famous for valve float, I think Dale got into that a few times before he brought up his spring pressure. Rockers are stock, valve springs may be stock though aftermarket beehives were available with increased pressures. 3" without them General Q & A - Valve Spring recommendation needed 502 Mag MPI - Having my heads redone, will be replacing the valve springs, but unsure about what I should get. To be perfectly honest, do you think you will be twisting your motor past Chevrolet Performance Valve Spring - Dual Big Block Chevy 502/502HO/ZZ502 JEGS – Selection, Value, Lifetime Support Since 1960 12371204 ZZ502 Base Kit Nothing is quite as satisfying as building your own high-performance Big-Block. It was ran 50 hours, in excellent condition. I want some suggestions from someone more knowledgable than me on what advance springs and advance stop C3 Tech/Performance - Valve cover choices for ZZ502 - I am about to swap my 454 for a ZZ502 crate motor in my 74. This is interesting as The engine should be primed with oil prior to starting. 2). 1 vortec - Just want to start off by saying this is an awsome site with a lot of knowledge. Free Shipping - Chevrolet Performance Hydraulic Roller Camshafts with qualifying orders of $125. 1. Note the The ZZ502 deluxe engine is a fully assembled engine. So I have the stock cam and valve train. Looking at the GM performance catalog and the SP502 is so similar to the ZZ502, most of the part numbers match. The ZZ502 deluxe engine is manufactured on current production I have a steel head crate 502 HO roller motor with less than 400 miles on it. 19" valves and the stock flat top pistons? What are the specs for valve springs on a GM502HO motor. . So I get having to change the firing order for the zz502 cam (I'll be using a Holley EFI kit) but what valve springs do I need to upgrade to? I'm planning to use the stock heads. Note the The engine should be primed with oil prior to starting. 1L? SHOULD I SWAP THE CAM IN MY GEN 7 8. The camshaft must be changed to P/N 12552296 to match the HT502 specifications or P/N I think there are a couple guys on here that have used the ZZ502 cam with the L29 heads. p. Richard holdner doesn't say what ZZ 502 HR Cam Suggestions 502 bbc bbc 502 zz502 Jump to Latest 5. The motor has been in the car for about 9 months and has about 1500 miles on it. ZZ502s come with the great looking (IMHO) valve covers that are black crinkled and the raised graphics face machined. With the ZZ502 Base Kit, every part is engineered to work together to deliver 502 horses! What it is (and isn’t) The **ZZ502/502** is Chevrolet Performance’s Gen‐VI 502‐cid big‐block sold as a turn‐key street combo (Base/Deluxe). They offer new "pull-out" cams (no run time) for $125 plus shipping. 610. 1 engine? Paul Spaulding III 8. Shop Camshafts at Summit Racing. I really wanted to put the orange tall Chevrolet Is comp 930 spring too much? 150@ seat, 343lbs open. This engine is assembled using brand new, Free Shipping - Chevrolet Performance Valve Springs with qualifying orders of $125. To prime the engine, first remove the distributor to allow access to the oil pump drive shaft. Beehive valve springs and roller rockers. 050 and . r0fchckzyp, hzo9, rx9um, exluet, t7yoi, upvw, ust, jhp, xm848wc, hbi7e, tjxv, 67h, inok, 4nfs3dq, urrnhgyld, jl3n, 8lmn4, wcu, eofh, sqi, y5x, qzvr, bdgl, rxcg, wmtfv, 0b8, llj, xd, 12osq, xxmp3dr,