111 Degree Lobe Separation Angle, 0.447″/0.462″ Valve LiftĤ. Strong low end and mid-range torque, 1,000-5,200 RPM, 210/218 Duration at. COMP Cams 12-235-2 Xtreme 4×4 210/218 Hydraulic Flat Cam – Best Value Camshaft For Small Block Chevy 540″/.562″ Valve Lift, Excellent performance in street carbureted applicationsģ. COMP Cams 08-432-8 Xtreme Energy – Premium Cam With The Best Performing SpecsĢ,800-6,100 RPM Operating Range, 242/248 Duration at. COMP Cams 12-602-4 Big Mutha’ Thumpr – Recommended Cam For Its Features And A Competitive PricingĢ95/313 Duration, 243/257 Duration. Get a good calculator, pull out the old math skills from the past and get to work.1.
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002 deck height with no problems, however they were not vortec heads, but same combustion chamber volume. I have run this combo 64cc heads w/flat tops and less than. My Gut feeling on this, as previously posted, is that if you put the Felpro 1003 head gaskets on this engine w/flat tops and vortec 906 heads, you will be fine on pump gas. There is no quick answer here, however if you are persistanat and want to know the real deal. You know that the block was bored out so the piston diameter for calculation purposes will be 4.020" Dial caliper would be sufficient unless you want the exact measurements. Straght edge tool with dial indicator a TDC to determine this volume.
![comp cam 350 chevy comp cam 350 chevy](https://static.summitracing.com/global/images/prod/large/cca-k12-210-2_w.jpg)
Pistons? Look at advertised specifications for vavle relief cc.īlock: is it O- decked or stock. Here is another article that explains the calculation process as well.Īssuming that the heads were not shaved during the machining process, they should be approx 64cc (vortec 906) correct?įelpro 1003 head gasket 8.44cc calculated - 9.1cc advertised volume. Get something somewhere? Give something up somewhere else.
#Comp cam 350 chevy free
The bottom line regarding octane, compression and detonation is "There's no free lunch".
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MANY a piston has been removed here, and the rings "fall off" due to detonation, and the customer says "It sounded fine." Aside from that, the bigger cam will actually "pack" the cylinder better at higher revs, compounding the problem. The ONLY thing working "for" you is the higher RPM leaves less time (on a clock) for the mixture to burn at peak cylinder pressure. Once the cam gets into it's "operating range", all that goes out the window. By using more overlap to bleed off the pressure at lower engine speeds, you "fool" the engine iinto thinking it's got less compression (dynamic). The quicker "burn rate" of lower octane fuel is the reason and there's no getting around it. It WILL reduce "spark knock", but it can't make the fuel burn slower. Mythology is that you can retard the timing and reduce detonation. The above issue regarding higher overlap and detonation is one such example. Many will tell you their ideas are the best, more to make themselves feel better about THEIR choices, than to give you solid advice. Gotta watch it when it comes to wannabes and "arm chair" quarterbacks. Many of them are VERY good sources of information. Still pay attention, but take with a grain of salt, what experienced ammetuers have to say.
![comp cam 350 chevy comp cam 350 chevy](https://i.ytimg.com/vi/sO4MyeMNANU/hqdefault.jpg)
#Comp cam 350 chevy professional
Pay close attention to what professional engine guys (or gals, I guess) have to say. The key is to know WHO to listen to and who NOT to.
#Comp cam 350 chevy full
The "net" is full of "old guys" that don't have a clue, and youngsters that do enough "real" research, they're very knowledgeable. But in higher revving engines, detonation is not only present, it is increased in the upper ranges. Using a cam with more overlap to reduce detonation is okay ("bleeds off" pressure at low engine speed) for low-RPM applications, though it kinda defeats the purpose. Even though you can't HEAR it, it IS detonating, at least a bit. However, the "laws of physics" won't be denied. It's true, the Vortec head uses a little "less" timing than older designs, due to the efficiency of the chamber design.