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car running slower that it should

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Old Jun 7, 2008 | 11:41 AM
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Default car running slower that it should
I have a 98 trans am with roughly 400 hp. for some reason i dont think im getting all that power. Just the other day i lost to a 02 ss with cat-back only. Im thinking it might be the cars motor having 160k on it. but i honestly have no clue. I just recently had a tune up as well so thats not it either. wondering what you guys think on the subject. thanks.

P.S. -- its not a driver mod either.
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Old Jun 7, 2008 | 11:49 AM
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what are your mods..your m6 im assuming?
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Old Jun 7, 2008 | 11:55 AM
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yeah what are your mods? have you had it dynoed to see if you really have 400 hp.
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Old Jun 7, 2008 | 12:04 PM
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Anything can happen on the street. I put a car on my buddies 2001 Z06 from a 5-10 MPH roll. He is no slouch when it comes to driving either, I am pretty sure he was spinning a little more than I did in 1st, 2nd.
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Old Jun 7, 2008 | 12:05 PM
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slp lm1 catback, pacesetter lt, carbon fiber air lid, ported tb, fast manifold, dr's, custom tune by GFORCE, bore over from 346 to 355, k/n, fast ram air, ls7 clutch, ls2 flywheel, ls6 slave cylinders, built t-56, eabock sportline springs, endlebrock struts and shocks, slp pully, plugs and wires, hurst short throw.
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Old Jun 7, 2008 | 12:06 PM
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373 gears, ory, slp maf, 160 therm also.
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Old Jun 7, 2008 | 12:24 PM
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With those mods you should have put a pretty good beating on him. Are sure he only had a catback? He could have had a little N02 helper?? I would take it to the track and see what you ET.
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Old Jun 7, 2008 | 12:27 PM
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yeah he only had cat back hes my next door neighbor. oh and he has a lid too, but still.....wtf.
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Old Jun 7, 2008 | 12:36 PM
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was it from a roll? wht gear did u start in?
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Old Jun 7, 2008 | 12:53 PM
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yes 45 roll in second gear.
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Old Jun 7, 2008 | 01:01 PM
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well most of the mods you listed dont do jack **** for power ... really, all you have that he doesnt is the longtubes
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Old Jun 7, 2008 | 01:05 PM
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hmm really, how you figure?
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Old Jun 7, 2008 | 01:12 PM
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Yeah I would re tune it and get some A/F readings. Somethings way off. Question though, you have a bored over motor with a stock cam?
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Old Jun 7, 2008 | 01:21 PM
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Originally Posted by Mikes96z
Yeah I would re tune it and get some A/F readings. Somethings way off. Question though, you have a bored over motor with a stock cam?
+1
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Old Jun 7, 2008 | 01:23 PM
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yeah but its just a 355. from a 346, but yes i do have a stock cam
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Old Jun 7, 2008 | 01:27 PM
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I didnt think you could bore it to a 355?
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Old Jun 7, 2008 | 01:29 PM
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learn new things daily.
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Old Jun 7, 2008 | 01:30 PM
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Originally Posted by Full-Force
well most of the mods you listed dont do jack **** for power ... really, all you have that he doesnt is the longtubes
how does a ported tb. and a fast intake not add power
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Old Jun 7, 2008 | 01:31 PM
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but still, what the hell is the issue?
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Old Jun 7, 2008 | 01:33 PM
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Originally Posted by Ah7394
but still, what the hell is the issue?
sounds like u could have a crappy tune, try takin it somewhere else, or take it back and tell the guy tht its not running as u think it should and ask him to adjust the tune possibly
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