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Thread: Opinions on SDPC CNC LS3 heads

  1. #11
    Too many projects.
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    Yep...makes me wish I waited when I got mine!

    I'm sure Greg/Pace has great pricing too as always
    2016 Chevy SS / Jungle / M6 / Spare / Roof
    2013 Chevy Avalanche / Z71 / FGM / Roof
    2009 Pontiac G8 GXP / SBM / M6 / No Roof
    1988 Volvo 740 Turbo Wagon (modified)

  2. #12
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    Just to put this topic to bed, I’ve talked to 2 VERY reputable guys that I’m sure everyone here knows and respects and they both said these heads are great budget heads for a LS3 but not for our L76 engines. They both said that they have seen these heads on L76’s and tuned them and saw little to no gain in power. They both say you either need to buy something like Mast heads with the canted valves or get a company CNC port LS3 heads specifically for our engines.

    I don’t want to post their names on here because I’m downplaying a product and I don’t know how that will effect them or who would get upset but I wanted to inform you guys. Just have your heads ported for the L76 or spend big money on some Mast heads etc.

    Having said all of that I’m going to buy a stock set of LS3 heads from SDPC and send them off to have them ported.

  3. #13
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    Have a set I could sell you for a fair price

  4. #14
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    Regarding CarRamrod's comment...I don't see how the heads will perform differently on a LS3 vs. an L76 (assuming cam change and DoD delete). What we essentially have after the DoD delete is an LS3 with 200 cc's less capacity. Same intake. Essentially same short block. Essentially same ECM with the ability to have the same programming. Bore is not that different. Doesn't make sense to me. And I realize this is something you were told. So I guess I don't agree with the sources. If the heads were placed on a stock L76 with DoD and stock cam/lifters/etc., then sure, they would be different. But our modded shortblock is essentially and LS2 with LS3 heads and intake.
    2008 Liquid Red G8 GT, VMS 1.5 DoD Delete and Tunes, Vararam CAI, Kooks Mid-length Headers, high-flow cats, Corsa Catback exhaust

  5. #15
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    It’s not the head itself. It’s the CNC port program they use on the head. It’s a great budget head for a LS3 but for our “LS2” motors there are much better CNC port designs out there specifically for our smaller bore engines. Stock for stock you’re right but we are talkin their CNC ported head.

  6. #16
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    I think the heads with a cam would be a great match.

    I know several who used the GM CNC heads on a 6.0 and made good power.

    They are a good budget friendly head across the board. A friend of mine just sold his with these heads on it and it was a great daily driver with good power for a cam/head combo.

    I don't see why even bothering to mention well respected people without a name is just sort of moot at that point. Maybe your contacts work for Mast or otherwise haha

    Just like my friends car, everyone has different results and there are plenty of tuners out there.

    Do what you want, what you can afford, etc.
    Last edited by MIEngineer; 02-08-2018 at 05:40 AM.
    2016 Chevy SS / Jungle / M6 / Spare / Roof
    2013 Chevy Avalanche / Z71 / FGM / Roof
    2009 Pontiac G8 GXP / SBM / M6 / No Roof
    1988 Volvo 740 Turbo Wagon (modified)

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