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Thread: LQ4 intake swap for a 4 bolt 90 mm TB

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  1. #1
    Join Date
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    Quote Originally Posted by genXhunter View Post
    I had upgraded my injectors to the 31 lb with the last tune. Had the trans beefed up and added a small stall. It should be ready today around lunch. Planning to go to the track tonite to see where I am now as far as ET and mph in the 1/4. Still plan to try the 90mm setup on my 5.3. Later on, might switch to a 6.0 but for now i'm sticking with the 5.3. What does the x-link adapter do and where is it installed?
    well the plugs are different from a 78mm tb to a 90 tb...one is a 6 pin and the other is a 8 pin...the harness adapts the stock 78 tb harness to the 90mm harness so it basically just makes it a plug n play type deal...minus a couple small adjustments in the tune
    2006 silverado SS....Clifford Jr...turbo coming soon
    1970 Chevelle ly6 swap....d1 coming soon

  2. #2
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    Sep 2007
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    Quote Originally Posted by mean05 View Post
    well the plugs are different from a 78mm tb to a 90 tb...one is a 6 pin and the other is a 8 pin...the harness adapts the stock 78 tb harness to the 90mm harness so it basically just makes it a plug n play type deal...minus a couple small adjustments in the tune
    It's not just the plug being different. The TPS sensor protocol is different between the 03-07 classic TB and the LS2/ GMT900 TB and LS3 TB. The xlink converts the signal to something the 2003 TAC can understand.
    You probably already know this, but just making it clear for everyone else.

    My truck being a 2001 with DBW however didn't need the xlink. I just spliced on the correct plug for the 90mm TB. The 2 extra wires are redundant 5v+ and low reference, the new TB doesn't need them. I did my intake swap last night. Throttle is working perfectly, now I need to do some tuning, it is idling like crap.

  3. #3
    Join Date
    Nov 2006
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    Quote Originally Posted by PitchBlackC3 View Post
    It's not just the plug being different. The TPS sensor protocol is different between the 03-07 classic TB and the LS2/ GMT900 TB and LS3 TB. The xlink converts the signal to something the 2003 TAC can understand.
    You probably already know this, but just making it clear for everyone else.

    My truck being a 2001 with DBW however didn't need the xlink. I just spliced on the correct plug for the 90mm TB. The 2 extra wires are redundant 5v+ and low reference, the new TB doesn't need them. I did my intake swap last night. Throttle is working perfectly, now I need to do some tuning, it is idling like crap.
    Lol yeah i didnt wanna get to technical on it so i just keep it easy...
    2006 silverado SS....Clifford Jr...turbo coming soon
    1970 Chevelle ly6 swap....d1 coming soon

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