Chevy406

iTrader: (12)

I dusted off (virtually speaking of course) my old Dyno2000 program to help select a camshaft for my '99 Corvette daily driver. I have used the compression calculators to pick my valve events (224/230 XFI lobes), but I didn't have a good grasp on how LSA and advance affects my particular combination. The results from my simulation show that a 110°+0° will give the best power, and only -2 ft*lbs less torque than a wider LSA. The peak power increased 5 hp going from a 111°+1° to the 110°+0°. Any tighter LSA or advance dropped the power off at peak.

What is the general thoughts on basing cam selection from this computer simulation? Does anyone else have dyno modelling experience with LSX engines? By the way, the computer model's result of 493 hp ( or 443 rwhp @ 10% loss) seems fairly believable for my bolt-on C5 with AFR 205 & FAST 78mm.

1997bird

iTrader: (2)

Are you a A4 car or a M6 car?

1FST99Z

iTrader: (9)

Well I have seen that dyno2000 system pick some nice cams and come really close to what it gives you as far as hp. but I have seen other knowledgeable people that have real world experience pick a different cam for the same setup and gain power across the board. so it works both ways.

Chevy406

iTrader: (12)

Well, I went ahead and ordered a 111° +1° cam, based on conversations with experienced people. Most folks have only seen a 1 to 2 peak hp change with varying LSA by 1 or 2 degrees.

My car is MN6 by the way.