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port polish tb

This is a discussion on port polish tb within the External Engine forums, part of the LSx Technical Help Section category; i just did it, and it looks great now what gains are there, hp and et, times...

  1. #1
    Member silverz28camaro's Avatar
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    sebring silver
    2000 z28

    port polish tb

    i just did it, and it looks great now what gains are there, hp and et, times

  2. #2
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    1999 T/A

    how did the p/p go? i have been wanting to do the same thing just dont wanna mess anything up. ive heard that it does pretty descent in gains, not sure on how much though.
    MS4 Camshaft, Doulble Valvespring, Chrom Moly Hardened Push Rods, QTP LT Headers, 3" Custom Strait Pipes w/ Single Chamber Flowmasters Dumped,
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  3. #3
    *lick* 99_natural_beauty's Avatar
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    1999 Trans Am WS6

    I had this done to a stock one by someone else (who turned out screwed up the paint job so now the original stock one is back in but that's another story), and to the best of my recollection that was the only thing I changed between the dynos and got roughly 8hp. I don't think it by itself does as much as some people say it does. I would expect 5, 10 at the most. Although you might see more of a difference top end out on a highway.

  4. #4
    Ross
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    I would say around .05 in the quarter mile maybe .1. But it definitley makes a difference in throttle response and if you gain 5whp from a free mod then its well worth it.

  5. #5
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by firesilver View Post
    I would say around .05 in the quarter mile maybe .1. But it definitley makes a difference in throttle response and if you gain 5whp from a free mod then its well worth it.
    Maybe a .02 in the 1/4 at the most!!! If your only doing this mod by itself you shouldn't expect more than a few horsepower!!! And that gain in power my friend will make NO difference in your et.

    I work at a machine shop and 70% of or work is head & intake porting....I've seen ALOT of ruined t/b due to people porting through the casting!!! You should be able to take it to a "decent" shop and get it done for $40-75.
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

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