Reduced cats mid-pipe, retune needed? - Ford Mustang Forum
 
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post #1 of 4 (permalink) Old 11-21-2010
TunableInduction
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Reduced cats mid-pipe, retune needed?

On a 2008 GT500 with 110mm CAI, diablio tuner, 2.6" SC pulley, IW oversized crank pulley, FRPP TB twin 63.5mm, Corsa sport mufflers, aluminum driveshaft, & Dynojet dyno tuned @ 16# boost & 557 rwhp, 595 rwtorque.

If I replace stock "catted" mid-pipe with "smaller/reduced cats" mid pipe (less back pressure)......Would I need to have car re-tuned or will on board computer re-learn/adjust for reduced back pressure??

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post #2 of 4 (permalink) Old 11-21-2010
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The difference should be minimal and shouldn't need a retune. You could always throw it on a dyno just to check the AF ratio unless you have a WB gauge in your car.


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post #3 of 4 (permalink) Old 11-21-2010
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Thanks, that's how I would handle the V6 & GT CAI tuned cars we do. But, not building (yet) & tuning the larger HP GT500 CAI's & tunes, wanted to double check with those of you who know your stuff
 
post #4 of 4 (permalink) Old 11-22-2010
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Wish i had a GT500. Hopefully in the next year or two I can.

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