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ls6 heads

This is a discussion on ls6 heads within the Internal Engine forums, part of the LSx Technical Help Section category; my buddy has a set of stock ls6 heads brand new he wants to sell them to me for about ...

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    Member Ieatstangs's Avatar
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    Question ls6 heads

    my buddy has a set of stock ls6 heads brand new he wants to sell them to me for about $300. can anybody tell me what kind of gains would i see he says he has everything and needs the money? this is the link where he got them

    https://store.gmperformanceparts.com...-12564824--%3E

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    I don't sell out! blackSS01's Avatar
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    The heads will def add some power. They flow better on the intake side and exhaust side. They are a smaller CC chamber then the LS1 head that will bump up compression for a power gain. The valves are hollow and sodium filled which help in Higher RPM range. For $300 dollars and being new, I would jump on these RIGHT AWAY Have them ported and polished, with a mill job and these heads will help incrediably.
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    Quote Originally Posted by blackSS01 View Post
    The heads will def add some power. They flow better on the intake side and exhaust side. They are a smaller CC chamber then the LS1 head that will bump up compression for a power gain. The valves are hollow and sodium filled which help in Higher RPM range. For $300 dollars and being new, I would jump on these RIGHT AWAY Have them ported and polished, with a mill job and these heads will help incrediably.


    the ports on these heads are "d" shaped will my headers still work?

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    I don't sell out! blackSS01's Avatar
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    Yup, even with them being D-shaped if you look at the headers, they will work.

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    Thumbs up

    Thank you

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    I don't sell out! blackSS01's Avatar
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    No prob, thats a steal for brand new 243 castings. If you don't do any work to them, and just bolt them on, you will probably see around 20 hp gain. Not 100 percent sure since its hard to guess that kind of stuff.

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    Im going to have them ported and polished. The more the better

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    I don't sell out! blackSS01's Avatar
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    Depending on cam, I would mill them to at least 64 CC down from 65 CC. Most will tell you that 62 CC is the way to go. Me personnally had mine milled to 64 CC.

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    What are your numbers? what did u gain?

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    I don't sell out! blackSS01's Avatar
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    Still in the process of my H/C/clutch/new exhaust/rims/ I can keep it all coming

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    Quote Originally Posted by blackSS01 View Post
    Still in the process of my H/C/clutch/new exhaust/rims/ I can keep it all coming
    i dont think anybody is "done" lol maybe mr.lous but who knows

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    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by Ieatstangs View Post
    i dont think anybody is "done" lol maybe mr.lous but who knows
    Pretty much hit the nail on the head

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    i dont think your ever really "done" theres always something. Ya those heads port and polished and milled would be awsome. I have some LS6 casting heads that were port and polished, then milled to 59CC's. your gunna love it!

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    You will see more gains w/ milling then you will w/ porting especially w/o a cam. The good news is that it's cheaper than porting anyway, I would definatley mill down to at the very least 62cc. For people not worried w/ smog go ahead and do 58-59cc.

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    Quote Originally Posted by c5z28 View Post
    You will see more gains w/ milling then you will w/ porting especially w/o a cam. The good news is that it's cheaper than porting anyway, I would definatley mill down to at the very least 62cc. For people not worried w/ smog go ahead and do 58-59cc.
    are you following me?

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    Quote Originally Posted by c5z28 View Post
    You will see more gains w/ milling then you will w/ porting especially w/o a cam. The good news is that it's cheaper than porting anyway, I would definatley mill down to at the very least 62cc. For people not worried w/ smog go ahead and do 58-59cc.
    But with that CC you have to worry about PTV if you go cam later.

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    Quote Originally Posted by blackSS01 View Post
    But with that CC you have to worry about PTV if you go cam later.
    power now! and people use the ms3 cam and torquer cams with milled 59 truck heads

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    Quote Originally Posted by blackSS01 View Post
    But with that CC you have to worry about PTV if you go cam later.
    depends on the cam, i had a 230/230 .600/.600 @ 50 with 59CC combustion chambers. stock bottom end. no problems 397RWHP

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    I don't sell out! blackSS01's Avatar
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    Quote Originally Posted by Dr.Crash View Post
    depends on the cam, i had a 230/230 .600/.600 @ 50 with 59CC combustion chambers. stock bottom end. no problems 397RWHP


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    Quote Originally Posted by blackSS01 View Post

    you look confused

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