4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Can anyone tell me there guess around how much horse power my modded 4.6l has????

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Old 11-05-2011, 10:34 PM
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carbon stang
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Default Can anyone tell me there guess around how much horse power my modded 4.6l has????

Ok so I have a 2003 mustang gt(4.6l sohc). I've had it for a while now but I was guessing I was putting out around 360 hp but I grandpa thinks I'm more around 320. Can some please tell me there guess around what my car is to solve a dispute please. Hear is a list of stuff I have done to my gt... Bassani med length headers, bkl custom x pipe with two bassani cats, full bassani exaust from x pipe back with two bassani mufflers and tips. C&l intake, aluminum pullies, accufab 75mm throttle body and upper intake plemum, sct tuner with custom jlt tune, 3.73 rear end gears, upgraded coils and plugs, pro5.0 shifter, eibach pro kit, pro sport harmonic damper, and Mac caster camber plates. I believe that's all, thank you for anyone who takes time to read this. We don't have a dyno anywhere around hear unfortunately.
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Old 11-05-2011, 10:43 PM
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dwtjr3
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Hate to tell u this but I would say ur right around 250and rwhp which is roughly 280 to the motor

Last edited by dwtjr3; 11-06-2011 at 05:49 PM.
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Old 11-05-2011, 11:09 PM
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Sean W.
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have you ever titled something before?
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Old 11-06-2011, 01:26 AM
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school boy
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id say in the 245rwhp range
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Old 11-06-2011, 07:30 AM
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02GTman
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Long tubes are the only real headers that make a differance on these cars.
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Old 11-06-2011, 01:23 PM
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Ryan86272
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Unfortunately our motors don't respond very well to bolt-ons.
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Old 11-06-2011, 01:43 PM
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everett
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I would guess 20 over stock to the wheels max. 360 is a dream without boost. Sorry bud
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Old 11-06-2011, 02:15 PM
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MCxQubed
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Originally Posted by school boy
id say in the 245rwhp range
i agree with this
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Old 11-06-2011, 02:24 PM
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TRUEBLUE3934
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You can see what I am making with all the bolt-ons and stage II cams (280-285rwhp, 325-330flywheelHP).

Every dyno is different, so you can't really compare what others make closer than +/- 10rwhp. I would guess you are close to 250rwhp, 290flywheel HP. Peak HP number doesn't mean much though. Take it to the track and see what it traps.
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Old 11-06-2011, 02:28 PM
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tdcalhoun89
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Originally Posted by school boy
id say in the 245rwhp range
This.
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