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Getting to 408 CID

This is a discussion on Getting to 408 CID within the Internal Engine forums, part of the LSx Technical Help Section category; I realize that you need a 4.000" Bore and 4.000" Stroke for a 402 setup and a 4.030" Bore and ...

  1. #1
    Junior Member dougcw's Avatar
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    Question Getting to 408 CID

    I realize that you need a 4.000" Bore and 4.000" Stroke for a 402 setup and a 4.030" Bore and 4.000" Stroke for a 408, both with a 6.125" connecting rod.
    When buying a LQ9 Block with a 4.000" x 4.000" setup how do you get to 4.030" x 4.000"? Do you have to resleeve or can you just simply bore 0.030" over? To my understanding the LQ9 is the exact same setup to a LS1 other than the LS1's 3.898" bore and aluminium construction. Are all of the sensors the same and would I have any problems transplanting it into an F-body? Am I correct or am I all FUBAR'd?

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    Veteran Hi-Po's Avatar
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    No sleeving will be needed for .030." over.

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    Slow'er'Ass Mr. Luos's Avatar
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    Bingo.
    Simple bore. Wouldn't go higher than .030 over though.

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    Grand Imperial Wizard Sarge's Avatar
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    Yup....^^^^

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    Junior Member dougcw's Avatar
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    Thanks for the input on the boring. I was hoping that is what the case would be. What about the differences between LQ9 and LS1?
    Mods: FAST 90mm, Nick Williams 90mm TB, TR 230/224 .581/.567 111 LSA, CC 921 springs, Hooker LTs, Hooker ORY, SLP Loudmouth, Eibach Pro Kit, Billstein HD, Baer Eradispeed, Whisper Lid, BMR SFCs, BMR Adj. LCAs, BMR reloc. brackets, HPTuners. 418HP/390ft-lbs rearwheel on a DynoJet.

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    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    LQ9 is a iron block from a truck....LS1 is an aluminum block....you can bore the iron with less space between the cylinders than you can an aluminum block...

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