Aprox. horsepower?

[LS1 TA]

I live in BFE New mexico, which is probably closer to hell than it is to a dyno, track, or water for that matter. So I was wondering if I listed what I've done to my car if you gentlemen could take a shot in the dark as to the horsepower my car may be producing. From what I've read a stock L98 has 245HP and 340ft/lbs of torque. My engine has:

Been bored 40 over
headers
3 inch exaust/ flowmaster muffler
no cats or smog
K&N airfilter, no screen in Mas airflow sensor
removed coolant hose from the throttle body
heads have been milled.

[N20LT4Bird]

I live in BFE New mexico, which is probably closer to hell than it is to a dyno, track, or water for that matter. So I was wondering if I listed what I've done to my car if you gentlemen could take a shot in the dark as to the horsepower my car may be producing. From what I've read a stock L98 has 245HP and 340ft/lbs of torque. My engine has:

Been bored 40 over
headers
3 inch exaust/ flowmaster muffler
no cats or smog
K&N airfilter, no screen in Mas airflow sensor
removed coolant hose from the throttle body
heads have been milled.

I used to own an L98 car, and its been a while since ive been into them, but I think your a little high on the stock numbers......the L98 was rated at 225 or 235 (at most) and I dont know about torque, but I cant see 340 ft/lbs.....

My car had a cam and a little head work and with a 150 shot of nitrous, I was only trapping about 108-109 mph.......

The big hang up on the L98's is the intake runners. They are great for low end torque, but really dont make any power past 5000 RPM. Youve increased the exhaust flow, but to really make power, youve got to open up the intake side on the TPI's . I bet youve added 20 or 30 HP though, but the track is really the "tell all"........

[LS1 TA]

[QUOTE=N20LT4Bird]I used to own an L98 car, and its been a while since ive been into them, but I think your a little high on the stock numbers......the L98 was rated at 225 or 235 (at most) and I dont know about torque, but I cant see 340 ft/lbs.....

My car had a cam and a little head work and with a 150 shot of nitrous, I was only trapping about 108-109 mph.......

The big hang up on the L98's is the intake runners. They are great for low end torque, but really dont make any power past 5000 RPM. Youve increased the exhaust flow, but to really make power, youve got to open up the intake side on the TPI's . I bet youve added 20 or 30 HP though, but the track is really the "tell all"........[/QUOTE

I looked it up again and you were correct about the HP 235.
Engine: 350ci (5.7L), 9.3:1 Compression, Tuned Port Injected,
HP: 235@4400 RPM, TQ: 340@3200

I bought a new plenum and runners that I'm having ported out as well as a 58mm throttle body. that should help some more.

[Trash man]

Z28
Formula
Trans Am
T/A GTA A4 L98 V8 9.3:1 5.7 (350) 245@4400 345@3200

team3rdgen.com

[N20LT4Bird]

Z28
Formula
Trans Am
T/A GTA A4 L98 V8 9.3:1 5.7 (350) 245@4400 345@3200

team3rdgen.com

I stand corrected if that is true.......

[Trash man]

L98TA what year is ur car? cuz that depends on the output of the L98 motor

[LS1 TA]

Its a 1989 formula 350. I'm thinking that it had 235 instead of 245.

[Trash man]

89 IROC
Formula
Trans Am A4 L98 V8 9.3:1 5.7 (350) 230@4400 330@3200 TPI ---- ---- 2.77* ----
89 IROC
Formula
Trans Am A4 L98 V8 9.3:1 5.7 (350) 240@4400 345@3200 TPI ---- ---- ---- 3.27

http://team3rdgen.com/modules.php?name=3rd_Gen_Specs

[LS1 TA]

My car beats my friends LT1 (AT) by about a car and a half from a role. They have about 275HP correct?

[DeWynter]

If you give me all specs I can run it through my engine program and give you Crank and wheel power. Need cam specs and comprestion mostly, as I have the L98 already made including TPI intake and all that

[LS1 TA]

Cam and everything is stock, the only differences are the things I listed above and I'm assuming the compression is a bit higher due to the heads being milled.