I would have quessed about 20rwhp more than what you wound up with but it doesn't really matter. Could just be the dyno, who knows? There just numbers anyways and I'm sure the car is a blast to drive (M6). I'm a big fan of Lloyds work and hope to upgrade my LE set-up this coming summer.

 

I was close on the numbers.

 

Thanks for posting the graph. They way the motor hangs on for 500rpm at the top tells me you could use a little more air like you thought. It could be the throttle body. You will need analyze your whole intake system starting with the air filter.

 

Yeah a few of you guys were pretty darn close..
Cheaters probably looked at Lloyds website for the #'s!! j/k

Well Jeremy Formato, buddy who tuned my car... said that he doubts my high flow cats negatively affected the HP.. But also thought a 58 would help a lot judging by the flat peak. WS6.com shows very little HP difference on a bolt on Ram air LT1 Borla open vs closed adjuster plate. But I think with a heads and cam car its probably a few horsepower.

Yeah the restriction on the intake is the 52mm. Good cold air, large MAF ends and descreened.