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408

This is a discussion on 408 within the Internal Engine forums, part of the LSx Technical Help Section category; ok guys well i picked a 2001 ls1 block up at carlisle today..... got a awesome deal on it. guy ...

  1. #1
    sick & twisted SS 02_slp_ss's Avatar
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    ok guys well i picked a 2001 ls1 block up at carlisle today..... got a awesome deal on it. guy said it had somewhere around 40k miles on it, i looked it over top an botom no cracks nothing. cyl walls look brand new. so i jumped on it got it for 125$ he was asking 500 for it..... any way i want to make a 408 out of it. can u do this with the ls1 block or do u need the 6.0? i been looking around but can find very little info on them, thought u guys might no some more things to help me out.

    any imput would be nice

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    Member importhater81's Avatar
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    Lq4 block (6.0L truck block) is what most people build a 408 from.

    Not sure if it can be done with a Ls1,but I wouldn't be suprised if you could.

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    Junior Member southpaw0314's Avatar
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    i think you would need to have it sleeved to build a 408 with that block, it would be cheaper to use the 6.0 truck block

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by southpaw0314 View Post
    i think you would need to have it sleeved to build a 408 with that block, it would be cheaper to use the 6.0 truck block
    i thought u might have to sleeve it, didnt really want to go with the LQ9 just because there heavy! but i dont know what i want now lol talking to my tunner a little an me an him where thinking about doing 1 big turbo run stock CI. an have 8:1 pistons. but all still up in the air now

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    Slow'er'Ass Mr. Luos's Avatar
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    You would have to re-sleeve it for the larger bore.
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    Member importhater81's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    i thought u might have to sleeve it, didnt really want to go with the LQ9 just because there heavy! but i dont know what i want now lol talking to my tunner a little an me an him where thinking about doing 1 big turbo run stock CI. an have 8:1 pistons. but all still up in the air now
    With 8:1 pistons I would sure hope you're planning to run forced induction.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    didnt really want to go with the LQ9 just because there heavy
    85 extra pounds isn't that much when you make 750+ at the wheels.

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    Member importhater81's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    85 extra pounds isn't that much when you make 750+ at the wheels.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    85 extra pounds isn't that much when you make 750+ at the wheels.
    haha well u do make a good point there!! what will a stock block hold? id like to be in the 600 whp range


    the real question is Boost it or keep it all motor

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    cutting and welding mark21742's Avatar
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    Did you get a bare block, or rotating assy with it? I still have the Kateck rod bolts, 7 good pistons and rods, good crank and main caps.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    haha well u do make a good point there!! what will a stock block hold? id like to be in the 600 whp range


    the real question is Boost it or keep it all motor
    Block is good for that power range no problem.

    No real need to stroke it if all you want is 600-650 at the wheels. Boost will get you there with a forged motor.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by mark21742 View Post
    Did you get a bare block, or rotating assy with it? I still have the Kateck rod bolts, 7 good pistons and rods, good crank and main caps.
    i got the bare block, how much u want fo rthat stuff

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