Total gains for O/R x pipe + 93 tune? -

4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

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Old 01-09-2012, 11:47 AM   #1
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Default Total gains for O/R x pipe + 93 tune?

How much total HP would I gain by going to an O/R x pipe and putting a SCT 93 octane tune on the car at the same time? anyone done a before/after dyno with these changes?

Also, would having flowmasters be worse for hp than some type of straight through muffler like borla stingers?
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Old 01-09-2012, 12:08 PM   #2
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I have not done a before/after dyno for a tune and mid pipe but peak gains might not be more than 10 or 15 rwhp. You might feel a better pull throughout the rpm range though.

IIRC someone did a flow test on common mufflers and Flowmasters (I think they were the 40's?) were among the worst, but I doubt anyone could feel the difference between a chambered muffler like the Flowmasters and a straight through muffler.
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Old 01-09-2012, 02:46 PM   #3
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A 93oct tune should gain you a little power across a wide range of rpm. The X-pipe might gain you a little at peak. I'd bet on about 8-10rwhp gain at peak if a custom dyno tune is made.

The Flowmasters won't cost you any power vs straight thru mufflers on your car. The difference is pretty small on anything short of a boosted high HP motor.
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