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heads

This is a discussion on heads within the Internal Engine forums, part of the LSx Technical Help Section category; can u get the same horsepower out of ls1 ported heads as oppose to ls6 heads?...

  1. #1
    Impounded
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    silver
    02 modified z28

    heads

    can u get the same horsepower out of ls1 ported heads as oppose to ls6 heads?

  2. #2
    member since may 2000 nhraformula's Avatar
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    black
    2000 nhra edition formula

    if you dont port the ls6 head, youll make more power with a good port and polish job from an ls1 head.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  3. #3
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    That goes without saying thou.... dont take your heads off and just go to grinding with a die grinder in the areas that "look" like they need it. You will more than likely screw it up. If you open you r heads up to much in the wrong places you lose air velocity at low speeds. Coming from a guy that has porting experience, i would let someone else do the port work ecspeccialy if it is aluminim heads.

  4. #4
    Member M6HUGGERSS's Avatar
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    millenium yellow
    2002 corvette Z06

    if the porting work is equal no..... LS6 heads make more power.

    but if the porting is equal...... if you mill more off the ls1 head you can make more....

    stage 2 ls1 with 11.5:1CR < stage 2 LS6 /w 10.5CR
    315rwhp 98 SILVER Z28 (3500lbs)- SOLD
    400rwhp 99 HUGGER SS (3375lbs)- SOLD
    340rwhp 02 YELLOW Z06 (3040lbs)

  5. #5
    Veteran Hi-Po's Avatar
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    1999 TA WS.6

    Milling the head changes the relationship between heads and or block and intake manifold. There are other ways of going about gaining more compression. buying heads with small volume chambers already casted or CNC machined in, or use domed pistons/. If you do mill the heads or raise any comprssion you have to reduce total ingition timing and use higher octane fuel.

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