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On 2001-10-02 19:23, BULLITT00208 wrote:
I have been reading a lot of things about the difference in power of the GT to the BULLITT. IT doesn't make sense to me that are cars are only a little bit stronger than a stock GT. Dyno tests on a GT with an aftermarket cat-back system have shown gains that put it right in the ball park with the BULLITT's horsepower. The BULLITT already comes with the free flowing exhaust which should negate the effects of an aftermarket cat-back. If you put underdrive pulleys on a stock GT you have a dead heat in power and torque. IT just doesn't make sense that with the intake, dual throttle bodies, Performance Improved heads and retuned computer that we don't have more power. Somewhere in there there has to be a weak link that is preventing everything else from maximizing it's potential. Could it be heat soak from the metal intake, or casting flash causing airflow loss? I don't know, but it doesn't seem right that an exhaust and pullies will help the GT make the same power as the BULLITT with so many more performance pieces.
Eric
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Let me see if I can help explain.
The pullies on the Bullitt are only on the water pump and alternator, not the crank. So the increae there is marginal at best.
The exhaust are the same with the exeption of the mufflers and tips. Probably not much there either.
If your engine is already getting enough air, then a higher flowing TB won't help. GTs with bigger thottle bodies are also picking very minimal gains.
The intake. Has anyone flowed one of these things? Runner length? I would bet that until someone really digs into the intake and figures out what to do all it will do is change your torque curve and raise it a little.
The heads are the same as 01 GTs, so that's a wash.
Hotter ECU probably isn't that hot. I would bet that it *may* bump up the timing, but not much since it still recommends regular unleaded.
I think there is some hidden power in the intake, but everything else is GT.