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LS2/LS6 heads with my cam.

This is a discussion on LS2/LS6 heads with my cam. within the Internal Engine forums, part of the LSx Technical Help Section category; Hey everybody, I had a quick question: I'm looking into buying a set of LS2 heads from a local here ...

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    LS2/LS6 heads with my cam.

    Hey everybody, I had a quick question: I'm looking into buying a set of LS2 heads from a local here in San Diego. I'm a little hesitant because last time I did a head swap, I did it with 5.3L heads and I ended up not having enough valve-cylinder clearance. Long story, anyway, I don't want to have the same problems with a set of LS2 heads. I ended up putting my stock ones back on.

    My cam is a little one, 222/222 with .566"/.556" lift. It was too much lift for the 5.3L heads without reliefs cut into the pistons. I'm not gonna have the same problems with the LS2 heads, am I?

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    ORNGP33L 1BADDLS1's Avatar
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    Hugger Orange
    1999 Camaro Z-28

    243 castings?
    what gasket do you plan on running? OE MLS
    are the heads milled @ all?
    stock valves?

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    Yes, 243 castings, stock valves, no milling that I know of, they're brand-new off of a crate engine and I will be running cometic gaskets, part number C5317-051 and H1067.

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    ORNGP33L 1BADDLS1's Avatar
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    Hugger Orange
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    these would bolt up with out any problems - no need to worry about PTV - However its always good practice to clay atleast one cylinder just to be safe

    these heads are 3.905 bore (confirm that though)
    so you'd be better off with a 3.905 or 3.910 bore gasket
    the cometic part# you provided shows
    Cometic MLS Cylinder Head Gasket, LS1 Engine, .051 thickness, 4.130 bore
    you'd be better off with the
    C5475 Cometic MLS Cylinder Head Gasket, LS1 Engine, .051 thickness, 3.910 bore

    (again verify the bore!!!) you want as close as possible to not create any hot spots
    and you can also call cometic & have them custom make ANY gasket for you

    is this going on your 2000 camaro (LS1 block)?
    whos cam is that? is it a Comp grind?

    PS i didnt catch the 2nd part# you gave (H1067)

    PPS i can also help you figure out your aprox SCR & DCR when all is figured out
    Last edited by 1BADDLS1; 02-08-2007 at 08:37 AM.

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    Yeah, it's a Comp grind and it's going on my block

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    Yeah, they're 3.905". Just checked.

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    ORNGP33L 1BADDLS1's Avatar
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    Hugger Orange
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    anything else?

    also whats the LSA & advance ground? 112/114 +2 +4 etc etc

    right now im assuming 112 LSA +2

    personally i would run a .040 gasket to get your compression up to 11.04 & DCR to 8.59 (which is 91 octane friendly for Cali)
    better then milling the heads to up the compression + better quench
    Last edited by 1BADDLS1; 02-08-2007 at 08:18 PM.

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    Far as I know, it's only 112, no advance ground. What is DCR?

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    ORNGP33L 1BADDLS1's Avatar
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    Hugger Orange
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    dynamic compression ratio

    for pump gas you dont really want to go above 8.6 DCR to stay 91 octane friendly... if you had access to 93 octane you could squeez 8.7+

    ill have to re-run your numbers with out 2 degrees advance... ill update your DCR then

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