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Old 01-16-2007, 10:50 PM   #1
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Default Mustang info (not a race)

Hi,

This post is for the people on this site that have knowledge on Mustang GTs. A guy that lives near me has recently bought a supercharged 99 gt, and from what I've heard from people that have talked to him about the car is that he claims he is running 10 psi? He has a catback exhaust and an intake, as far as I know, and he is claiming over 400rwhp (I think hes talkin out his *** but not sure) . I haven't got a chance to talk to the guy to get all the details on what kind of charger is on it but does the rwhp number sound correct? To me it seems high especially with the minimal amount of boltons and I was told that the bottom end of the 2V motor does not hold up at this level of power. Also how should my car hold up to this car in a drag race? ( I don't have any dyno #s for my car)

Sorry if this post is in the wrong section, but I really didn't know where else to put it.
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Old 01-16-2007, 10:53 PM   #2
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Yes, that sounds about right. And yes, properly tuned (pump gas), the 2v 4.6 can support ~425rwhp on boost.
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Old 01-16-2007, 11:21 PM   #3
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Old 01-16-2007, 11:33 PM   #4
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Quote:
Originally Posted by 99RebelZ28
Hi,

and he is claiming over 400rwhp
I don't think so. I had a buddy with a 97 GT (not much diff in the motor from a 99) who had a supercharger pushing 6lbs through it and it only dyno'ed 290 on a dynojet dyno. I highly doubt that 4lbs more would have boosted it over 400. And my buddy also had full bolt'ons.
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Old 01-16-2007, 11:39 PM   #5
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Yeah, well I was thinking the car stock is only pushing like 220-225 hp to the wheels, its hard to believe that he improved his rwhp by almost 100% with a charger and minimal bolt ons
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Old 01-16-2007, 11:46 PM   #6
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its a REAL longshot, but since I haven't seen it on a dyno I can't be absolutly sure.
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Old 01-16-2007, 11:50 PM   #7
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i like *****
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Old 01-17-2007, 12:08 AM   #8
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Quote:
Originally Posted by 99RebelZ28
Yeah, well I was thinking the car stock is only pushing like 220-225 hp to the wheels, its hard to believe that he improved his rwhp by almost 100% with a charger and minimal bolt ons
Stock, a 5spd 99-04 GT puts down 230-235rwhp normally. And a '97 GT is quite different than a 99-04. The heads in the later cars (PI- Performance Improved) flow quite a bit better, the cams are worth 10rwhp alone, and the intake manifold is a 20-25rwhp difference. And those differences become greater once you apply boost. So add 50-60rwhp to your friend's '97, and then add 4psi to that.
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Old 01-17-2007, 12:14 AM   #9
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still doesn't put it ANYWHERE near the 400 mark.
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Old 01-17-2007, 12:19 AM   #10
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so 4psi can't add 40-50rwhp?
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Old 01-17-2007, 12:20 AM   #11
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what gave it the initial 60hp to put it at 350?
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Old 01-17-2007, 12:22 AM   #12
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99 gt at school put down 302hp non-intercooled on 4psi
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Old 01-17-2007, 12:22 AM   #13
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...only had intake too, no exhaust
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Old 01-17-2007, 12:23 AM   #14
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Did you read anything I typed? 99-04 GTs have BETTER HEADS, CAMS, AND INTAKE MANIFOLD, WHICH IS WORTH 50-55RWHP ON AN N/A CAR.
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Old 01-17-2007, 12:26 AM   #15
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yea, i read. now I understand that you are stating that a 99GT has 50more rwhp than a 97 GT. I don't think so. I would love to see some proof of that. Then i'll stand corrected.
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Old 01-17-2007, 12:28 AM   #16
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enough debating for one night. maybe more tomorrow
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Old 01-17-2007, 12:34 AM   #17
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Well as a former owner of a '98 GT, that personally researched/installed PI cams and a PI intake manifold on myself, and almost did the headswap (researched the **** out of that too), and a current owner of an '01 GT, trust me... I know . And if you do a PI head/cams/intake swap on a non-PI GT, you end up with about 240rwhp, with no other mods. Swapping that stuff on bumps the compression from 9.3:1 to about 10.0:1.
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Old 01-17-2007, 01:42 AM   #18
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I'm sure its possible, I've heard of mid to upper 300s on 8psi. But thats with headers and bigger than stock x pipe. 10psi on stock manifolds with a catback just sounds a little weird to me. Either way, a GT with 10psi will beat you.
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Old 01-17-2007, 03:07 AM   #19
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Quote:
Originally Posted by Irunelevens
Stock, a 5spd 99-04 GT puts down 230-235rwhp normally. And a '97 GT is quite different than a 99-04. The heads in the later cars (PI- Performance Improved) flow quite a bit better, the cams are worth 10rwhp alone, and the intake manifold is a 20-25rwhp difference. And those differences become greater once you apply boost. So add 50-60rwhp to your friend's '97, and then add 4psi to that.
Am I lost here? You say 99-04 GTs make 230-235rwhp which I agree with. This guy has catback and intake and running 10psi...How is he getting 170+rwhp from that to push over 400?
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Old 01-17-2007, 06:04 AM   #20
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Quote:
Originally Posted by Irunelevens
Well as a former owner of a '98 GT, that personally researched/installed PI cams and a PI intake manifold on myself, and almost did the headswap (researched the **** out of that too), and a current owner of an '01 GT, trust me... I know . And if you do a PI head/cams/intake swap on a non-PI GT, you end up with about 240rwhp, with no other mods. Swapping that stuff on bumps the compression from 9.3:1 to about 10.0:1.
Thats the beauty about doing the head swap on pre 99 models. More power!
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