How much HP for added bolt-ons?

[snk1233]

In the near future I plan on adding a couple of bolt-on parts to my stage 2 for added HP. Two definite mods I plan on doing is the cold air intake and the pulleys. As for the exhaust, what would you all recommend? When I had my '01 GT I had MAC cat back and a catless X-pipe. It was way too loud and raw sounding. With my '06 stage 2 I'm looking for an exhaust combo that adds power as well as sound - but I don't want in sounding too loud (just louder than the roush exhaust that the car comes with which seems awfull quiet??), and I wan't to keep the cats. And also what section of exhaust will give me the most power in terms of headers, high flow x-pipe, or catback??? As far as HP, how much will the intake, pulleys, and exhaust add?
-Thanks

[05-1947]

I love my set up! See sig below.

[JPS05ROUSH]

Before I put the Vortech on I was making 278 rwhp and 292 rwtq. This was with an aFe Stage II CAI, JBA shorty headers and Steeda UDP with stock rear gears. The aFe is a little more restrictive than some of the other CAI's, but did not require a tune. When I did get it tuned she was already at 270rwhp with those mods so I only gained an extra 8 tuning it. And the A/F was right on the money on the first pull before tuning.

The JBA's gave it a tiny bit more aggressive sound on the low end, and real nice when you go WOT. I'm still trying to make up my mind what I want to make it louder now without making it to unbearable.

[snk1233]

Originally Posted by JPS05ROUSH

Before I put the Vortech on I was making 278 rwhp and 292 rwtq. This was with an aFe Stage II CAI, JBA shorty headers and Steeda UDP with stock rear gears. The aFe is a little more restrictive than some of the other CAI's, but did not require a tune. When I did get it tuned she was already at 270rwhp with those mods so I only gained an extra 8 tuning it. And the A/F was right on the money on the first pull before tuning.

The JBA's gave it a tiny bit more aggressive sound on the low end, and real nice when you go WOT. I'm still trying to make up my mind what I want to make it louder now without making it to unbearable.

Do you know how much rear wheel hp a stock GT comes with? I was thinking about adding the JBA's and then maybe some flowmaster's for the exhaust. I want to do the same as you in terms of making it louder but not unbearable. Its just too quiet now.

[JPS05ROUSH]

Stock is probably around the 255 range before any tuning or mods, a little more or less.

[FordFan]

Originally Posted by snk1233

Do you know how much rear wheel hp a stock GT comes with? I was thinking about adding the JBA's and then maybe some flowmaster's for the exhaust. I want to do the same as you in terms of making it louder but not unbearable. Its just too quiet now.

Muscle Mustang dynoed a stock 05 at 275hp before adding a cold air intake and tuning it with a tuner. I will be dynoing both our Mustangs May 20th at a dyno day I'll let you know if its far from that.

[JPS05ROUSH]

Not that I really care or it matters much, but was that on a dyno jet or a Mustang dyno. 2 distinct different readings can be had depending on which one you use. The place I use has a Mustang dyno and it will show less than a dyno jet.

[LSUFAN]

With JBA LT's (catless Hpipe), 20" rims, 4.10 gears, intake and off road exhaust with underdrive pullies and perfectly tweeked program, 294/310 rear wheel hp/lb. If you're running stock gears and 17 or 18" rims, I would bump that up to probably 305/320. That's about all you can get out of the modular engine w/o SC.

[FordFan]

Originally Posted by FordFan

Muscle Mustang dynoed a stock 05 at 275hp before adding a cold air intake and tuning it with a tuner. I will be dynoing both our Mustangs May 20th at a dyno day I'll let you know if its far from that.

Follow-up: 2006 Roush auto trans - stock baseline dyno numbers

Dynoed May 20th on a Mustang Dyno / 258 hp - 272 torque

[FordFan]

Originally Posted by FordFan

Follow-up: 2006 Roush auto trans - stock baseline dyno numbers

Dynoed May 20th on a Mustang Dyno / 258 hp - 272 torque

ONE YEAR LATER May 19, 2007

Here is the new numbers after todays Dyno day / same Mustang dynometer but now with mods -> C&L racer kit, Brenspeed XCAL2, Bassiani catted X-pipe, UD pullies.
Numbers may have been a bit better but I hadn't planned ahead on the fuel so we had to settle on the 92 octane tune.

296 hp / 300 torque

[TMB Roush]

Originally Posted by snk1233

In the near future I plan on adding a couple of bolt-on parts to my stage 2 for added HP. Two definite mods I plan on doing is the cold air intake and the pulleys. As for the exhaust, what would you all recommend? When I had my '01 GT I had MAC cat back and a catless X-pipe. It was way too loud and raw sounding. With my '06 stage 2 I'm looking for an exhaust combo that adds power as well as sound - but I don't want in sounding too loud (just louder than the roush exhaust that the car comes with which seems awfull quiet??), and I wan't to keep the cats. And also what section of exhaust will give me the most power in terms of headers, high flow x-pipe, or catback??? As far as HP, how much will the intake, pulleys, and exhaust add?
-Thanks

I have a 2007 stage 2
See link below for dyno run & numbers
Basic bolt ons BBK CAI, BBK TB, Roush O/R Exhaust, Diablosport Predator U7145 tuner with custom tune
2007 Stage 2 dyno'd today