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enkeivette · 06-15-2008, 01:07 PM

I was playing around with the valve lift on desktop dyno with my engine, seeing what the difference between 1.5 and 1.6 rockers would be.

My cam is 236 in 242 ex/ .520 in .540 ex/ 110LSA with the 1.5 rockers. Changing the exhaust rockers to 1.6 (increasing the valve lift to .576) I gain 6 hp at peak rpm, but when I change the intake rockers to the 1.6 (increasing valve lift to .555) the peak hp goes down 2 hp.

What's the verdict? Am I maxing out the potential of my AFR 195 heads? Or should I not trust the software?

06-15-2008, 01:07 PM	#1
enkeivette Super Moderator Join Date: Dec 2007 Posts: 6,850 Tweet	Confusing desktop dyno numbers. I was playing around with the valve lift on desktop dyno with my engine, seeing what the difference between 1.5 and 1.6 rockers would be. My cam is 236 in 242 ex/ .520 in .540 ex/ 110LSA with the 1.5 rockers. Changing the exhaust rockers to 1.6 (increasing the valve lift to .576) I gain 6 hp at peak rpm, but when I change the intake rockers to the 1.6 (increasing valve lift to .555) the peak hp goes down 2 hp. What's the verdict? Am I maxing out the potential of my AFR 195 heads? Or should I not trust the software?