Re: High flow cats/catback, roe flash,3.55's 29HP less
Goldcup,
I wouldn't panic. You have made two significant changes that could be causing the discrepancy but it will feel stronger.
The first was you changed gears - changing the gears will normally reduce the dyno numbers. From 3.07 to 3.55 you could naturally see 10-15hp loss but the car will feel much better and stronger because of the gears.
Secondly, your initial run was with no cats or mufflers. You have added both cats and mufflers which will again restrict the flow and cut back on the dyno numbers. That in itself could cause 15-20rwhp loss top end which accounts for the remaining number loss.
I believe these two factors could be your cause. Still check the plugs and make sure everything else looks good but I wouldn't panic yet. Could simply be the combination thats causing it. If you want to see what the exhaust will do then uncap the headers and make a pass and see if the 15-20hp comes back.
Just my 2 cents. Good luck.
God Bless,
Keith
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2008 SRT10 Vert - 10.86 @ 128.29mph  , All motor
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