Big problem with my power dyno numbers

[mazspeed]

Originally Posted by ProdigyCustoms

My imediate thought was air cleaner. Also, do not under estimate drivetrain loss. I have seen many cars loose 25% on a RW dyno. So you may already be at 500HP before final tuning, which would not be that bad after all.

I should only have around 10 to 15 percent drivetrain loss. TKO 600 with 373 gears in a 12 bolt with a true trac. We had to downsize the filter by about half from stock.