Thread: l26/l36 upper intake swap

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  1. #1 l26/l36 upper intake swap 
    GT Level Member GOINDEF's Avatar
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    I was wondering has anyone done this, if so were there any gains. I know you would need the TB adapter but someone told me you get like 10-20 up increase


    anybody heard of this stuff?
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  2. #2 Re: l26/l36 upper intake swap 
    DUI BABY Bio248's Avatar
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    you wont gain any power from it. its just not made of plastic anymore so you dont have to worry about blowing it up, cracking it, etc.
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  3. #3 Re: l26/l36 upper intake swap 
    SE Level Member Phantom's Avatar
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    The other difference is the inlet is longer on the L27 and is round and moves to a D-shape, while the L36 is a butterfly shape (same as L36 TB out) and has a divider in the path.

    I did the conversion last month, but can't say if I had any gain from it since I also ported my LIM at the same time.


    Agrazela did some testing on this issue and he saw gains in "calculated VE".
    BonnevillePRO.com • View topic - L26 aluminum UIM on L36--Done! With results!!
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  4. #4 Re: l26/l36 upper intake swap 
    GTP Level Member SuperSport's Avatar
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    Quote Originally Posted by Phantom View Post
    The other difference is the inlet is longer on the L27 and is round and moves to a D-shape, while the L36 is a butterfly shape (same as L36 TB out) and has a divider in the path.

    I did the conversion last month, but can't say if I had any gain from it since I also ported my LIM at the same time.


    Agrazela did some testing on this issue and he saw gains in "calculated VE".
    BonnevillePRO.com • View topic - L26 aluminum UIM on L36--Done! With results!!
    Holy crap a topswap looks easier than that write up...
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  5. #5 Re: l26/l36 upper intake swap 
    GTP Level Member QwikGT's Avatar
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    just swap it for an M90 only way youre going to make power on a L36/26
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  6. #6 Re: l26/l36 upper intake swap 
    SE Level Member Phantom's Avatar
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    All that is actually required is a tap, 2 hose barbs, a plug or 3 if you need to block the coolant, a short bit of hose for pvc, the upper gasket, and an adapter plate.

    The hardest part was actually getting the adapter plate drilled out, but if you have a drill press that will be no problem.

    The write up goes a bit in to detail and was wrote as he did it.
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  7. #7 Re: l26/l36 upper intake swap 
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    Hello,can you help me out, I'm trying to swap plastic plenum for aluminum
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  8. #8 Re: l26/l36 upper intake swap 
    SE Level Member Phantom's Avatar
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    Absolutely what do you need or what is your hang up?
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