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07-17-2007, 04:27 PM
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CC Member
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Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
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Not Ranked
07 GT500 Dyno
I know you guys like this stuff, so here's some info on an 07 GT500 I just did for a customer....
Car baselined at 411rwhp. The car was bone stock, except for long tube headers and high flow cats. Unfortunately, exhaust does nothing for these cars, and it actually hurt the power a bit, as these cars usually baseline about 430-440.
I added a carbon fiber intake/MAF system, and a 2.6 blower pulley. Threw it on the dyno and tuned it.
The car went from 411rwhp/411rwtq, to 541rwhp/532rwtq. That's a gain of 130 hp and 120 tq to the WHEELS. From a pulley, intake and tune. I can't think of any other car in the world that can gain 130hp to the wheels for $1000 in parts.
And on the street, this car is an absolute blast. A super torque monster ready to pull against anything it comes across. It may be 4000+ lbs, but who cares when you make 530 ft-lbs of torque to the wheels.
I can honestly say, this car totally lives up to what the original GT-500 was; a heavy, torque happy, stoplight brute.
Here's the before and after on the dyno:
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
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07-17-2007, 04:56 PM
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CC Member
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Join Date: Apr 1999
Location: cleveland,
OH
Cobra Make, Engine: CSX4000, 427
Posts: 1,999
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Not Ranked
Quote:
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Originally Posted by Power Surge
Car baselined at 411rwhp. The car was bone stock, except for long tube headers and high flow cats.
I added a carbon fiber intake/MAF system, and a 2.6 blower pulley. Threw it on the dyno and tuned it.
The car went from 411rwhp/411rwtq, to 541rwhp/532rwtq. That's a gain of 130 hp and 120 tq to the WHEELS. From a pulley, intake and tune. I can't think of any other car in the world that can gain 130hp to the wheels for $1000 in parts.
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That is impressive.
I've always had the idea that it was generally easy to easily boost up torque/HP on cars that came factory equipped with either a turbo or supercharger, as the factory generally doesn't run the boost very high, and it is very easy to increase boost, for more HP. I heard of someone sticking a needle into a vacuum/boost line to somehow trick the system into giving alot more boost, i.e. power. I think it was a turbo RX7 or Eclipse or something like that.
__________________
"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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07-17-2007, 05:53 PM
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CC Member
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Join Date: Nov 2004
Location: Jupiter, Fl & Thomasville, Ga,
Fl
Cobra Make, Engine: BDR # 165 392 Ford Crate 430HP
Posts: 503
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Not Ranked
Thats the way it should be a $1000 and a extra 100 + horses....nice
__________________
Like a kid in the candy store I just can't get enough
Current rides GT500 & Backdraft
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07-17-2007, 06:25 PM
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CC Member
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Join Date: Dec 2004
Location: Prince Frederick,
MD
Cobra Make, Engine: Unique 427 S/C 427 FE S.O. 484 cu in
Posts: 952
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Not Ranked
Nice.
We have a couple of GT500 running around our little town.
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07-18-2007, 07:26 AM
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CC Member
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Join Date: Jan 2003
Cobra Make, Engine: SPF#131 520 cubes; 650 HP
Posts: 108
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Not Ranked
Quote:
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Originally Posted by Anthony
That is impressive.
I heard of someone sticking a needle into a vacuum/boost line to somehow trick the system into giving alot more boost, i.e. power. I think it was a turbo RX7 or Eclipse or something like that.
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Very good Anthony, yes this is one simple way to accomplish more boost on a turbocharged car..
I have a friend with a VERY fast SVO Mustang (remember those; 1984-1/2 to1986 I think? 2.3L turbo 4 banger; factory rated at about 175-205HP depending on the model year). On the vacuum line that tells the computer when the factory set "overboost" is achieved, you can put a small "leak" in the line so that the turbo will continue to "boost" for a while longer...
Now, this has to be done VERY CAREFULLY and a bit of math must be done to figure out how much of a "leak" you want to induce to get you to the max. boost that you want. My friend cut the rubber overboost line (was about a 1/4" I.D. line if memory serves me) and put a small section of metal tubing in the middle so that he could get an accurate "hole size" for the proper amount of leakage. It was a VERY small hole (like .020"). But, this gave him enough of a leak to go from the factory max. boost of about 12psi, up to about 18psi (reports are that the Griffiths(?) turbo units in these cars could reliably deliver @30psi boost, but that the motor's bottom end wouldn't survive very long at these levels without some serious mods.).
Overall, this light little 4 cylinder SVO was spanking a LOT of V8 cars on the street!!! Those SVOs handled VERY well too, they had adjustable Koni shock on all 4 corners... What a little go-kart!
Pat
__________________
Shooter...Looter...Not Neutered.
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07-18-2007, 07:53 AM
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CC Member
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Join Date: Jan 2001
Location: Cape Coral,
FL
Cobra Make, Engine: 2009 Solbra
Posts: 3,861
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Not Ranked
Sal,
Is your increase in power keeping the Ford warranty intact as Shelbys GT500 package does or like Shelbys second power increase it also voids the Ford warranty. Of course in 2008 all these cars will be traded in on the new GT500KR.
__________________
Dan Wulff
I carry a gun because a cop is too heavy.
(No doubt, most will blame it on the donuts.)
You're just jealous because the voices only talk to me
Earth is the insane asylum for the universe.
The gene pool could use a little chlorine.
The original point and click interface was a Smith & Wesson.
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07-18-2007, 08:05 AM
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CC Member
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Join Date: May 2004
Location: Palm Coast,
FL
Cobra Make, Engine: Shelby American CSX 4241 - authentically built
Posts: 2,573
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Not Ranked
Quote:
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Originally Posted by CobraDan
Sal,
Is your increase in power keeping the Ford warranty intact as Shelbys GT500 package does or like Shelbys second power increase it also voids the Ford warranty. Of course in 2008 all these cars will be traded in on the new GT500KR.
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Very unlikely  .
As for the KR, I doubt you'll see many trade-ins. They make 9000 GT500s a year, and they are only making 1000 KRs.
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241
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07-18-2007, 10:31 AM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,290
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Not Ranked
Darn, maybe it can now keep up with a new Z51 08 LS3 Vette!! the car is just too bloated for my tastes... A straight line car fo-sho!
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Too many toys?? never!
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07-18-2007, 11:01 AM
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CC Member
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Join Date: Jan 2003
Cobra Make, Engine: SPF#131 520 cubes; 650 HP
Posts: 108
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Not Ranked
Quote:
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Originally Posted by undy
Darn, maybe it can now keep up with a new Z51 08 LS3 Vette!! the car is just too bloated for my tastes... A straight line car fo-sho!
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Oh you mean like THIS Vette (which I beat by almost 2 FULL seconds in the 1/4)?
I LOVE Corvettes... They taste like CHICKEN!
LOL...
Pat
__________________
Shooter...Looter...Not Neutered.
Last edited by PJS50; 10-03-2012 at 10:01 AM..
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07-18-2007, 01:24 PM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,290
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Not Ranked
Quote:
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Originally Posted by PJS50
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Then that's not a bloated mustang either..
I do love the rawness of my Cobra though.. 
Dave
__________________
Too many toys?? never!
Last edited by undy; 07-18-2007 at 06:49 PM..
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