exhaust hp

CaliJ1 · 10-25-2001, 09:43 PM

How much hp is expected to be gained at the fly and the rwh when adding long tube headers and a hpipe with coverters to a 99 gt with flowmasters?

1BAD89 · 10-28-2001, 05:04 AM

In my latest MM&FF mag. they dyno'd a stock Bullit, then put BBK longtubes, and H-pipe, and it added 30RWHP! So I'd expect similar gains with your car.

------------------
-1989 GT, not stock.

-2000 Camaro SS-A4,
13.4's bone stock.

-1989 Chevy S-10, EX. Cab-383(500+hp on motor), tubbed, trick flow heads, trick flow pistons, etc... autometer phantom gauges, "built" 700R4, roll cage, lexan back window, corbeau seats, R.H.S. 5 harnesses, Fuel cell, convo pro wheels, 15x14's with 29x18.5 M/T'S on back, 15x4's on front, nitrous, and so much more!

timk · 10-28-2001, 08:13 AM

but, in the mm&ff story, they were using an uncatted h, along with a computer retune.

i have those items with catted h, and no computer tune. 20hp seems more likely to me.
but maybe my car was a factory hound to begin with.

SMOKE · 10-28-2001, 11:11 AM

Well the real benefit will be seen when you add a power adder - supercharger.

10-25-2001, 09:43 PM	#1 (permalink)
CaliJ1 Registered Member Join Date: Aug 2001 Location: Goleta, Ca, USA Posts: 17	exhaust hp How much hp is expected to be gained at the fly and the rwh when adding long tube headers and a hpipe with coverters to a 99 gt with flowmasters?

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10-28-2001, 05:04 AM	#2 (permalink)
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	In my latest MM&FF mag. they dyno'd a stock Bullit, then put BBK longtubes, and H-pipe, and it added 30RWHP! So I'd expect similar gains with your car. ------------------ -1989 GT, not stock. -2000 Camaro SS-A4, 13.4's bone stock. -1989 Chevy S-10, EX. Cab-383(500+hp on motor), tubbed, trick flow heads, trick flow pistons, etc... autometer phantom gauges, "built" 700R4, roll cage, lexan back window, corbeau seats, R.H.S. 5 harnesses, Fuel cell, convo pro wheels, 15x14's with 29x18.5 M/T'S on back, 15x4's on front, nitrous, and so much more!

10-28-2001, 08:13 AM	#3 (permalink)
timk Registered Member Join Date: Sep 2001 Location: st. charles, mo. usa Posts: 2	but, in the mm&ff story, they were using an uncatted h, along with a computer retune. i have those items with catted h, and no computer tune. 20hp seems more likely to me. but maybe my car was a factory hound to begin with.

10-28-2001, 11:11 AM	#4 (permalink)
SMOKE Old School ROUSH Join Date: Nov 1999 Location: Stockbridge, GA Posts: 530	Well the real benefit will be seen when you add a power adder - supercharger.

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