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Port & Polish stock TB vs 80mm aftermarket TB

This is a discussion on Port & Polish stock TB vs 80mm aftermarket TB within the External Engine forums, part of the LSx Technical Help Section category; so, i understand that the stock TB is a 75mb opening, and the LS6 can(?) take up to an 80mm ...

  1. #1
    Junior Member
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    NBM
    2002 Trans Am WS6

    Port & Polish stock TB vs 80mm aftermarket TB

    so, i understand that the stock TB is a 75mb opening, and the LS6 can(?) take up to an 80mm TB:

    would it be a waste of money to simply buy a BBK or Accufab 80mm TB vs getting the stock TB ported and polish (and the chance that whoever does it screws up the job)?

    i would personally go with getting another TB and having the stock as a backup in case something goes wrong, or getting another stock sized TB and porting it to 78mm/80mm...


    any thoughts, input, would be greatly appreciated. I just can't decide, lol

  2. #2
    old timer blue02Z's Avatar
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    Navy Blue Metallic
    2002 Z28

    keep and port the stocker, good hp increase i thought. it would be a waste of money to buy an aftermarket one unless you get a good set of heads and a cam, if you do that get the fast 90/90 combo

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