Once in a while I post my DIRECT back to back test results from a few years ago, right on the dyno using the very best flat lobes available. Then I have to listen to a bunch of flucking NONESENSE from a few individules that visit here, who don't even have a car that moves, let alone ever built an engine and made it to the dyno with it.
For the record, it's my testing, I choose the parts, did it on my nickle, and the "modern" camshaft LOST power at every rpm compared to a Crower copy of the old RAIV cam. Sorry if if the "hype" didn't work, and sorry if I chose the cam too small even though it showed a SOLID 10 degrees MORE .050" and .060" MORE lift than the cam we replaced. The dyno showed that it LOST power at every rpm, and moved peak HP producton from 5600rpm's back to 5200rpm's.
FWIW, If you want to critisize my ars again, have at it...but first take about $10,000 and build your own test engine, then another $1000 or so for a week on the dyno, then open your big fat mouth and critisize my testing.
I stay quiet about it most of the time for this reason, just too many "Monday morning quarterbacks" on these sites these days who have nothing better to do than pick folks comments apart like a black bird picking corn out of cow poop!
Sorry for the attitude, just being right UP FRONT about it, concerning some of the testing we have done. All of us are on a learning curve, and I've learned a LOT about camshafts in recent years.
My opinion (again this falls into the FWIW department), the "modern" profile, fast ramp, short seat timing, more area under the curve stuff is a lot of "hipe". The limitations imposed on the parts due to the diameter of the flat lifters is simply too severe to allow us to drop out 20-30 degrees of off seat valve movements, then make it up with fast ramp technology.
COMPLETEY DIFFERENT deal when you move up to a roller cam, they can, and will do this quite effectively, but still do NOT make tremendous power improvements over running a well chosen flat cam with high ratio rockers and Rhoad's lifters........Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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