Thread: LS2 Throttle Body Install

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  1. #1 LS2 Throttle Body Install 
    GXP Level Member 91parkave's Avatar
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    EDITED: first off thanks to fieroguru, DavidGXP, and GXP25 for their research in this area the FSM GXP25 provided was the last unknown for this swap turns out my alldata Ls4 wiring diagram was wrong, so i deleted it out of the original post please disregard quotes of the orginal in posts mentioned below..


    Courtesy of GXP25
    **This is a general guide ALWAYS verify your year TB pinouts first**


    PINOUTS ARE AS FOLLOWS


    LS2 GTO TB . LS4 TB
    PIN A ---- PIN F
    PIN B ---- PIN E
    PIN C ---- PIN H
    PIN D ---- PIN A
    PIN E ---- PIN B
    PIN F ---- PIN D



    NOT USED PIN G&C ON THE LS4 HARNESS


    **If you have idle surge or hanging idle see below







    http://youtu.be/WI-RuRQ1nDc




    PARTS LIST:


    TB adapter here 55 USD http://www.alpermotorsports.com/inde..._detail&p=1688


    Pigtail: LS2 Throttle Body Pigtail Brand New LS2 TB Pigtail | eBay


    Throttle body: Ebay got mine for 140 shipped


    all bolts are m6 x 1.0 you will need 4 for the TB and 3 are included with the TB adapter to the intake manifold


    Thickness of LS2 TB for bolt length



    Adapter





    For issues with idle like i eventually had you will need to adjust 2 tables in the pcm


    ETC scaler and Base idle airflow need to be adjusted to get you idling right.
    here are the values i used with good sucess results may vary.
    Last edited by 91parkave; 05-16-2013 at 02:15 AM.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  2. #2 Re: LS2 TB install 
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    Any noticeable difference?
    It is just a FAMILY CAR
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  3. #3 Re: LS2 TB install 
    GXP Level Member 91parkave's Avatar
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    Quote Originally Posted by mudneck4 View Post
    Any noticeable difference?
    kind of a unfair question the LS1 intake is worth 15hp alone its also ported and instead of a 75mm TB theres a 90 now so needless to say theres more involved then just the TB here. When i get it on this weekend ill update
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  4. #4 Re: LS2 TB install 
    GrandPrix Junkie jteske88's Avatar
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    I'm loving this!
    2005 GP GXP-cocor tuned-poly's-lots of sundown
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  5. #5 Re: LS2 TB install 
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    Didn't know the ls1 or I read over it lol... I heard the ls1 intake swap was a b!tch to so?
    It is just a FAMILY CAR
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  6. #6 Re: LS2 TB install 
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    I can pick up a ls1 intake for 50$ so that's why I'm asking
    It is just a FAMILY CAR
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  7. #7 Re: LS2 TB install 
    GXP Level Member 91parkave's Avatar
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    If you can get a ls6 though i d get that But regardless the ls1 over the ls4 any day theres plenty of write ups though on ls1tech to get you through matter of fact nmp0098 has a writeup on this site iirc
    Last edited by 91parkave; 04-13-2013 at 02:21 AM.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  8. #8 Re: LS2 TB install 
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    Ill look into it. Might just be having one pop up friends going with a fast intake on his 00 camaro and he has a ls6 right now
    It is just a FAMILY CAR
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  9. #9 Re: LS2 TB install 
    GXP Level Member 91parkave's Avatar
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    Grab it and remember all ls6 intakes have a flat underside ls1's are curved
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  10. #10 Re: LS2 TB install 
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    Be flat out honest I'm a ford guy at heart and the Prix grew on me!!! What's the difference between flat bottom and curved? Clearance issues? Flow issues?
    It is just a FAMILY CAR
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  11. #11 Re: LS2 TB install 
    GXP Level Member 91parkave's Avatar
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    Nah that's just how gm made them ls6 intakes are way better than ls1's intakes but I'm cheap and not in a hurry to get one yet.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  12. #12 Re: LS2 TB install 
    I live here. DirtDog's Avatar
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    btw i like your motivated fu*k yea at the end of the video...youd think you just made a major improvement or something on your car
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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  13. #13 Re: LS2 TB install 
    GXP Level Member 91parkave's Avatar
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    Quote Originally Posted by marines542 View Post
    btw i like your motivated fu*k yea at the end of the video...youd think you just made a major improvement or something on your car
    **** I was happy I sent blow up my pcm lol but motivated.... Hell yea lol
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  14. #14 Re: LS2 TB install 
    I live here. DirtDog's Avatar
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    Do u remember the length bolts u ended up going with on the ls1 intake with the ls2 tb and all?
    http://www.grandprixforums.net/my-06-gp-gxp-72403.html
    OBX headers, TEP tranny cooler, ls1 IM fuel rails and injectors, ls2 TB, ls7 MAF, full custom exhaust, Quad retro headlights, full out front and rear suspension work, tuned by HPT by me 8====>

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  15. #15 Re: LS2 TB install 
    GXP Level Member 91parkave's Avatar
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    40mm. M6 bolts.
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  16. #16 Re: LS2 Throttle Body Install 
    GrandPrix Junkie SDGTP99's Avatar
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    I'm super late to the party I know. Soo with an '08 LS4 the LS2 TB is plug and play?
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  17. #17 Re: LS2 Throttle Body Install 
    GXP Level Member 91parkave's Avatar
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    For 08s use the ls3 gold blade they are about 130 brand new off Amazon Same wiring
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  18. #18 Re: LS2 Throttle Body Install 
    GrandPrix Junkie SDGTP99's Avatar
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    ^^^That's news to me. Thank you for letting me know!
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  19. #19 Re: LS2 Throttle Body Install 
    GrandPrix Junkie SDGTP99's Avatar
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    With an LS3 TB I lose the vacuum fitting that's on the LS4 TB. Where does it get moved to?
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  20. #20 Re: LS2 Throttle Body Install 
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    I Had to drill and tap my TB adapter to fit a new fitting for the brake booster vaccum line. I used a 1/4 NPT with 1/2 dia. barded end.
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