![]() My heads are unmilled (and they're staying that way, PB HATES IT:lol so I have a lot of PTV clearance, which is how I like it for now. Search for my dyno results thread here and in the tuning section for a detailed breakdown of parts and a sheet. I like my cam, it has a great powerband and good power up top, but after almost two years of running it I am starting to want something more. I say original because Livernois has since taken their stage 1 cam up 6 degrees of exhaust duration, to 224/236. 581/.591 cam, its the original Livernois L92 Stage 1 cam. It appears to me you are speaking in carbuerated, SBC terms, which have little to no bearing on the LSX world.Not trying to offend you here.Īnd also, you must not be familiar with the LSX motors because there is no way in high heaven you could fit a 25x /25x duration cam in an LSX with milled heads, without pistons with cast-in valve reliefs.Īnd just because your "bruuuuutal" vette runs whatever, those cams are EXTREMELY mild 205* intake, 219* exhaust, Lift: 0.551 intake, 0.549 exhaust, LSA: 117.4*) So that being said, please don't confuse this guy more without researching your claims.I have a 224/230. WHY would you want a 108* centerline, unless you are trying to spin the engine to 10,000 rpms? These motors make great power on 112-114*, with a nice torque curve. I have a 2000 vette convertible stock its bruuuuutal Im going to throw this out there too what about zo6 cam they run 0 -60 in high 3s or low 4s stock in a 3500 # vette. By the way you didnt say if this car is auto or stick. anyway call bullet cams or even summit racing tech line they are very very knowledgable. A local machinist hear built a 604 for an aquaintance of mine,assumed the ptv was good and destroyed a 22000 engine, of course it (wasnt his fault it was parts failure)yes a valve through a piston without even running was parts failure I will never use this guy. The heads on a ls engine are good out of the box, take advantage of them.but do not even think about installing a cam with out checking piston to valve clearance. 050 on 108 should run til around 6500 maybe 7 with afr 220 heads. ![]() I built a 23 degree engine street car 427 11:1 compression cam 644 lift 253 -259 duration. 050 taking into account cutting heads for more compression. bullet racing cams dead on sometimes herbert cams off a little you should select cam based on usage but if its a weekend driver I would look at cams with at least 244. always check vtp clearance as some cams have better quality control than others. Two cents cams with 238 are not big cams especially on 112 lobe center. Here is a GREAT Sticky pulled from the GURUS over on I ended up flycutting my piston for the intake valve. 007" on the intake and ~.085" on the exhaust. 588 /.591 on a 112 LSA), and i had PTV issues. It also has a LOT to do with the LSA of the cam, and the lift, not just the duration.įor what it's worth, I run a 62cc AFR 205 head on my Camaro (stock 2002 bottom end), with a Vengeance VRX4 cam (228/230. PTV clearance can vary greatly from cam to cam. ALSO when spinning to high rpm, or with a big, high lift cam, you really should go to a dual spring. I have LS7 lifters in my camaro, and it Pulls HARD to the 6750 limiter.Ĭam size generally does not denote the need for solid lifters. 020" Decked? What CC combustion chamber would that yield? I'd hold off on buying them until you get it tuned with the new cam, and see what kind of lb/hr you'll need. First off, LS6 injectors might not be enough.
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