LS6 to LS3 throttle body adaptor?
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2004-2007 Cadillac CTS-V General Discussion Discussion, LS6 to LS3 throttle body adaptor? in Cadillac CTS-V Series Forum - 2004 - 2007; My brother and I are installing an Eldebrock E force 2300 tvs supercharger on a 2005 CTS-V. The problem is ...
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    V-swagon's Avatar
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    LS6 to LS3 throttle body adaptor?

    My brother and I are installing an Eldebrock E force 2300 tvs supercharger on a 2005 CTS-V. The problem is that the flange on the supercharger is for a LS3 throttle body which is a 4 bolt design. The 05 V has the 3 bolt throttle body. We are wondering if there is a adaptor or spacer to make this setup work. Thanks.

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    ls6v is offline Cadillac Owners Member
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    Re: LS6 to LS3 throttle body adaptor?

    http://www.ebay.com/itm/221114087244?redirect=mobile

    Maybe this will do what you need..

    Edit: I think this is the exact reverse of what you need lol...sorry I tried.

  4. #3
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    danrob0123 is offline Cadillac Owners Fanatic
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    I would buy an ls2 or ls3 throttle body. The 78mm ls6 will be robbing power on a setup like that, and plus I don't think anyone makes an adaptor. I could be wrong though.

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    V-swagon's Avatar
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    Thanks for the input.

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    V-swagon's Avatar
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    LS3 throttle body it is.

  7. #6
    FuzzyLogic is offline Cadillac Owners Connoisseur
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    Re: LS6 to LS3 throttle body adaptor?

    The LS3 throttle body is incompatible with LS6 and LS2 cars. The blade turns the wrong way, and no tuner thus far has been able to modify the ECU to adapt. If you ordered one, cancel the order immediately.

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    wait4me's Avatar
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    Re: LS6 to LS3 throttle body adaptor?

    That is not correct Fuzzy, the ls3 works just fine with your computer if you set it up correctly, I have done it MANY times for MANY 2004-2007 model ctsv.. Just do a search, I was even putting in stock and modified ls3s in them for a while for people. Probably 18 or so? Some are on this board..

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    V-swagon's Avatar
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    Quote Originally Posted by wait4me
    That is not correct Fuzzy, the ls3 works just fine with your computer if you set it up correctly, I have done it MANY times for MANY 2004-2007 model ctsv.. Just do a search, I was even putting in stock and modified ls3s in them for a while for people. Probably 18 or so? Some are on this board..
    If they're different, what needs changed?

  10. #9
    FuzzyLogic is offline Cadillac Owners Connoisseur
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    Re: LS6 to LS3 throttle body adaptor?

    Quote Originally Posted by wait4me View Post
    That is not correct Fuzzy, the ls3 works just fine with your computer if you set it up correctly, I have done it MANY times for MANY 2004-2007 model ctsv.. Just do a search, I was even putting in stock and modified ls3s in them for a while for people. Probably 18 or so? Some are on this board..
    That's news to me and everyone else I've ever talked to. You must be one of the few, if not the only one.

  11. #10
    darkman's Avatar
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    Re: LS6 to LS3 throttle body adaptor?

    The only tuner that matters here is the tuner the OP will use. I never buy a throttle body/ intake combination without talking with the eventual tuner first.

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    wait4me's Avatar
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    Re: LS6 to LS3 throttle body adaptor?

    Fuzzy, If you do a search on this forum, I posted what was needed to be done several years back. It requires me writing custom code in the computer operating system and some new tables put into the cal segment to allow for different things, then it works as advertised.... You can find a few members from this board running my ls3 conversion as well.

    It can be done.

  13. #12
    V-swagon's Avatar
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    My brother has a tuner in Columbus that is suppose to get everything worked out. I'll keep you posted.

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