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What are the specs on the GM 151 cam? I have the stock L82 cam out while I do several projects. It looks good, but I will replace it since it is over 30 and I have it out. I want good low end and vacuum to operate the car as it is now. With the Turbo 400 and 3:36s my RPMs are 3200-3400 at hwy cruise with stock aluminum wheels. I really dont think I need a 5000-6000 rpm cam. A good low end bump will be fine I just dont want to go backwards from what I have
What are the specs on the GM 151 cam? I have the stock L82. It looks good, but I will replace it since it is over 30 and I have it out. I want good low end and vacuum to operate the car as it is now. With the Turbo 400 and 3:36s my RPMs are 3200-3400 at hwy cruise with stock aluminum wheels. I really dont think I need a 5000-6000 rpm cam. I good low end bump will be fine I just dont want to go backwards from what I have
A Crane Energizer 272H offers slightly higher lift and shorter duration than the GM 151; but a shorter Lobe separation angle of 110. 216@.050 and .454/.454 max lift with 1.5R rockers. I run this in my rebuilt L48 and it is very responsive.
You may also consider a recurve of your ignition timing... THAT will show the greatest improvement (if you haven't done it already) over the cam you are considering as the GM 151 cam is nearly identical to what you are running stock. Rebuild/Tune carb, free-flowing exhaust and you are off to the races!
'80 Garnett Red 'Shark' Coupe - NEW (2013) Comp Xtreme Energy Retro Roller Cam K-Kit (K12-422-8). .502/.509 lift with Comp 1.52 Ultra Pro Magnum rollers, 1600-5400rpm range, Adv.Dur. 270 Int./276 Exh., 218/224 @ .050", LSA 110, Freshened DART Iron Eagle 180cc intake, 72cc chamber... and MORE.
A cam with shorter intake duration will make the car more responsive on street ... something like TedH's crane suggestion ... or a $70 cam&lifter kit from Summit like K1103.
25+ years-ago, a buddy and I both built-up our Z28 Camaros from stock (my '79, his '81 ), and we used 'similar' camshafts:
he used the Chevrolet "151 cam, while I used the SUMMIT 'house'-brand (I believe General Kinetics ground them? ), with .450"-lift and 218* @ .050"-lift diration, and while transmission, rear-gearing, cylinder heads and intake were the same (I used a Holley 650 double-pump, he used his Q-Jet ), my car usually out-ran him by .05 to .10-seconds at the strip, and got the same MPG figures, too.
Does General Kinetics still prvide SUMMIT with camshafts?