In all actuality, those numbers are about what I'd expect with the FRPP tune. The typical '05-'09 S197 stock puts down about 265 RWHP. The FRPP tune adds roughly 15 RWHP crank (basically the Bullitt tune) which is roughly 13 RWHP. So if I had to take a stab at your RWHP based on your mods I'd have to say about 280. Since the accuracy and repeatability of the dyno has known variance, it sounds to me like you're right on for your mods.

With a good custom tune you should be able to add about 8-10 RWHP. Toss in the UDPs and add about another 5-6.

 

dyno jet? its just a number, as the saying goes the BS stops when the green light drops, have you ever taken it to the 1/4 mile? has your friend?

 

Why don't you both take it to the track. Fontana is having street legal racing Nov 20 and Dec 4. Gates open at 6 A:M, tech 6:30 and racing begins at 9:00 A:M. Regarding dyno numbers, your friend my have a factory freak. Bone stock 05-09 Mustang GT with a manual will put down 260-265 rwhp and 275-280 RWTQ.

 

Please lets not go there lol

 

that only means 1 thing....................









SC time!

 

I wish!!! If only I could afford it.

 

Any suggestions for more power?

S/C is outta the question...

 

Those are not bad numbers man. 300 is the crank HP. Assume only a 15% loss
300 x .85 = 255 rwhp.

You made 276 so:
276 / .85 = 325

Not bad.

We exist

 

N2O.


but seriously. i wouldn't worry about 5-10 hp. every car will be different.

 

I'm guessing it was a Mustang Dyno also? That will affect numbers..