Thread: *HOW TO* LS6 Intake Manifold Swap

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  1. #21 Re: Successful LS6 Intake Manifold Swap, DOD Retained 
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    I basically cut the end of the connector off (kind of in half), which leaves you with metal leads encased in plastic. I left material on both ends of the connector so I could work with the connector end and the VLOM end. With some careful saw work and some melting, I exposed the metal enough to get a good contacts on both ends. I then soldered wires to the little metal leads that I had exposed, which electrically reformed the connector. I then used epoxy to protect my solder joints on both ends. If you need more detail or a better explanation let me know and I'll try to get back to you sooner.
    2007 GXP, CAI Intake, 85mm MAF, LS6 Intake Manifold, 42# LS3 Injectors, PRC Ported and Milled 243 Heads - 11:1, 224/232-113+5 Comp Cam, PAC 1218 Springs, DT Headers (w/Custom Crossover Pipe), Cutout and Maxflows, TEP Transmission (3.29s), HP Tuned by Me, Pioneer Speakers and MTX Subs, 13.1 @ 108.7 on street tires at full weight.
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  2. #22 Re: Successful LS6 Intake Manifold Swap, DOD Retained 
    I live here. DirtDog's Avatar
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    Bump this thread back to the top so it can get stickied in the 5.3 section. i didnt even know this site had a thread for this fun sh*t
    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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  3. #23 Re: Successful LS6 Intake Manifold Swap, DOD Retained 
    The Blue One blueguy's Avatar
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    Done and done.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  4. #24 Re: Successful LS6 Intake Manifold Swap, DOD Retained 
    I live here. DirtDog's Avatar
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    Sweet. I'll be adding a lot of pics soon to it

    Sent from my HTC6525LVW using Tapatalk
    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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  5. #25 Re: Successful LS6 Intake Manifold Swap, DOD Retained 
    GXP Level Member 91parkave's Avatar
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    There's a great advanced LS tuning done by him years ago as well. Really good read
    http://www.grandprixforums.net/threa...ng-Information
    06 GXP | 222/227 cam/cartuning turbo kit on 8psi/meth/e85 coilovers/ still on stock trans at 130k
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  6. #26 Re: *HOW TO* LS6 Intake Manifold Swap 
    GrandPrix Junkie SDGTP99's Avatar
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    LS6 Rectangle port manifold to LS4 cathedral port head. Is that not important?
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  7. #27 Re: *HOW TO* LS6 Intake Manifold Swap 
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    yes that would cause problems. Are you sure its an ls6 Intake?
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  8. #28 Re: *HOW TO* LS6 Intake Manifold Swap 
    GrandPrix Junkie SDGTP99's Avatar
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    ^^^yeah it sure is. Part #12573572 stamped on it indicates LS6. Hmm.
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  9. #29 Re: *HOW TO* LS6 Intake Manifold Swap 
    GrandPrix Junkie SDGTP99's Avatar
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    Ohkay nvm. I stumbled upon an answer on LS1Tech. Here it is in case anyone else has the same concern:

    ScottyBG*, 12-17-2016 09:19 AM

    "If you look at the head, the pointy area at the top of the port lines up with the injector. Originally the LS cathedral head got the cathedral shape to allow the fuel injection to shoot fuel into the inflowing air stream more efficiently. Old school it was all designed around carburation, and airflow (air with evaporated fuel in it) as the only consideration. If you consider the head, without the "gable peak" on the port for the injector to shoot fuel in, the rectangular area of the head and the intake match quite well. So the addition of fuel injection, as a new technology, changed the way of thinking regarding matching head and intake ports. On a BBC the cross sectional area of a rectangular port is considerably different, than an oval port, and flow very different. The ports in your LS6 manifold flow appropriate amounts of air for the ports in your LS6 head.

    You still don't want to try and put an LS3 or LS7 intake on a cathedral port head, that truly is a mismatch, because the volume of the ports are so different..."

    I honestly did not know this.
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  10. #30 Re: *HOW TO* LS6 Intake Manifold Swap 
    GXP Level Member 91parkave's Avatar
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    Ls6 has never been a rectangle port. Your fine to run it.
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  11. #31 Re: *HOW TO* LS6 Intake Manifold Swap 
    GrandPrix Junkie SDGTP99's Avatar
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    Doing this swap and can't find a TB adapter to make it all work? Try LS Throttle Body Adapter / 3 Bolt Intake to 4 Bolt TB You'll end up with the adapter and a spacer. These only work with larger TB's like an LS3 TB. For a total just shy of $60, pricey but ya can't be picky when there isnt anything else on the market.
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  12. #32 Re: *HOW TO* LS6 Intake Manifold Swap 
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    Here's what you get w the ICTBillet spacer & adapter.




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