By the way, anyone getting 421rwhp off of 6lbs only must have long tube headers and X pipe, bigger throttle body, or the tuner is using aggressive timing.

With stock exhaust, JDM wasn't getting better than 390-395rwhp on 6 psi with the Saleens, so I'm wondering how you'd get 421rwhp with out help???? Erik

 

I'm just tellin yall what the dyno sheet reads believe me I ain't lying there is a thread with the dyno sheet posted. Like I said I don't know what he did and a lot of the people in this area go to his joint to get their tune and have been for 15 years, also like I said the car is being sold anyhow and I think the S/C kit is being stripped off before they sell it or they are putting the stock air box on and re-sending the PCM to Roush, either way it's off my hands probably in the next 10 days......hopefully.

 

what kind of dyno?
STD or SAE corrected?

 

I'm looking at the dyno sheet now that you bring this up and on the sheet it has STD WHP listed what is the correction factor? Is there a certain percentage, I seen a forum that said it is about 3-5% less so that would make it closer to 395-400, am I correct on this? It was a 248H dyno.