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ls2 heads

This is a discussion on ls2 heads within the Internal Engine forums, part of the LSx Technical Help Section category; how much gain will you get by putting ls2 heads on a ls1...

  1. #1
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    ls2 heads

    how much gain will you get by putting ls2 heads on a ls1

  2. #2
    Senior Member bills98ta's Avatar
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    White
    1998 Trans Am

    You will drop compression... If you plan on boost, it would work well. Be better off to port what you have. Heres a neat head spec link !

    http://www.smokemup.com/tech/ls1.php

    I went with the 5.3 heads & had big valves installed with a port job.

  3. #3
    Member MikeMoss's Avatar
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    Rally Red
    2001 Camaro B4C

    ls2 heads are the 243 castings which is the same thing as the ls6 head but the ls2 didnt come with the sodium filled valves.

    241's have 66.67cc combustion chambers
    and
    243's have 64.45cc combustion chambers

    so your compression will actually go up from like 10.1:1 to like 10.5:1.

    Just unported 243 usually make almost 20hp over the 241's.

  4. #4
    NYSpeed.com WhatUpWhatUp's Avatar
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    2002 z28 A4

    how much hp and tq if the ls2 heads were fully ported and polished over stock ls1(241's) ?

  5. #5
    Senior Member INMY01TA's Avatar
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    2001 Trans Am (sold)

    Quote Originally Posted by bills98ta View Post
    You will drop compression... If you plan on boost, it would work well. Be better off to port what you have.

  6. #6
    NYSpeed.com WhatUpWhatUp's Avatar
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    so should i pick up some 243's fullly ported and polished for $400-$450 ?

  7. #7
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    various
    1986 Turbo 944

    are they just the heads or do they have the valves and springs in them?

  8. #8
    NYSpeed.com WhatUpWhatUp's Avatar
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    Quote Originally Posted by cfgioja View Post
    are they just the heads or do they have the valves and springs in them?
    nope their just the heads

  9. #9
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    1986 Turbo 944

    I found mine for that price, the guy never picked them up from the machine shop after 6 months and had dual springs installed and reseated valves.

    From what I have been seeing 400 is not too bad of a price for just heads especially if the port job was good, that can get expensive, just think about the cost of valves and springs and go from there.
    Last edited by cfgioja; 09-22-2010 at 06:39 AM.

  10. #10
    NYSpeed.com WhatUpWhatUp's Avatar
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    okay thanks alot! i better hurry on them before their gone then

  11. #11
    Trigger Puller Trainer KC&97TA's Avatar
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    2000 FRC Camaro SS

    Quote Originally Posted by WhatUpWhatUp View Post
    nope their just the heads
    buy them and send them to Total Engine Airflow for a stage 2, I did, 225cc runners, 61cc chambers, they flow better than TFS 215's. You'll be happy with those, add a cam and you'll be set into the 400+ rwhp club

  12. #12
    NYSpeed.com WhatUpWhatUp's Avatar
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    i would love to do that but thats too much for my pockets.

    you dont think i'll be able to hit the 400hp mark with 243's full ported and a TorquerV2 ?

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