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'05 GP GXP vs. '04 Mach1 Mustang



Just throwing it out there...I have an ls1 intake....91parkaves old setup that'd if much rather give to someone I know then some random ls4 guy from facebook

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Below Average Joe said:
needs more this sound.......
Click to expand...

Working on that.

Brian Tooley Stage 3 I think is going to get the job done.

DirtDog said:
Scroll down on this page and look at the ls1 IM vs the ls6 IM
http://www.fiero.nl/cgi-bin/fiero/showThread.cgi?forum=3&thread=000123&style=printable

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Click to expand...

I know the LS6 is much better than the 1, I've just never checked the guts of an LS4, I guess they're really that bad. I knew they bottlenecked pretty bad after the TB.
 
Yea honestly the ls4 is ****. When u do an IM swap you'll loose a little bottom end torque. But we can spare some of that for more HP

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blueguy said:
On a scale from 1-10...how much difference does it really make?

I mean. Honestly.
Click to expand...
7with no tuning but since I already upgraded to the ls7 maf... And ls2 tb at the time of install . it was a 11on a scale of 1-10. The sad part is you get used to the new power fairly quickly and u want more.

I'll have to find some pics but the ls4 im bottlenecks almost half of the inlet after the tb the ceiling of the intake is shallow as hell and compared to the crude ls1 intake, you can see why this is a essential mod.
 


10-15 whp ....maybe a couple more give or take but the numbers grow way more with the other supporting mods, bigger tb, CAI, maf, exhaust .etc... Headers and intake manifold should put you at 310 whp.
 


How did I miss that?

Because a tune/intake/exhaust GXP makes 270~.

You're telling me an intake manifold and headers add 40WHEELhp?
 
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