ORIGINAL: korn253

Did u even look at that link? It has both before and after HP and torque raitings on the graph, there are 4 curves dip **** and they are color coded, think b4 u speak next time

ORIGINAL: Matts00GT

I looked at all of the dyno graphs. When hes talking about a 60 hp difference, it can only lead to that. Now stfu and be a nice kid.

ORIGINAL: Kolson

I have never been much of a car enthusiast, but I went from an old junker to a 2002 Mustang GT a month ago and I have started to fall in love with performance cars. I have learned more about cars in the last 2 months than in my last 25 years. (A couple years ago if you asked me what type of car I had I would say a blue one) These forums have taught me alot about what you can do with your Mustang to make it perform even better, but I often run into questions that are probably so basic that no one even bothers asking them. I took alot of physics in college so I have had little trouble understanding the terminology such as horsepower and torque curves, but I do have a question about a thread on Throttle Body/Plenum mods.

I found Dyno readings for a 2003 Mustang GT Stock Throttle Body/Plenum and Accufab Plenum w/ 75mm Throttle body at modulardepot.com through these forums. Plenum/Throttle Dynos

The summary shows that the Accufab parts gave a +6.31 hp boost at 4300 rpm, but what I am curious about is the apparent HP gains at low RPMs.

With the stock parts, the HP at 2500 rpms seams to be about 60hp. It then rises to about 125hp at 2615 rpms.

With the Accufab parts, the HP at about 2350 rpms is 70hp, a 10hp gain. It rises to about 120 hp at 2500 rpms, a good 60 hp higher than the stock parts. Is this a mistake with their charts, or do these improved parts actually give such a large boost at such low rpms? And if so, does this have much of a bearing on the car's acceleration at low speeds with minimul reving of the engine?