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LQ 408 Stroker

This is a discussion on LQ 408 Stroker within the Internal Engine forums, part of the LSx Technical Help Section category; I have done a bit of research on the internet and there are various budget build and build such but ...

  1. #1
    Junior Member
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    Pewter
    2001 Trans Am

    LQ 408 Stroker

    I have done a bit of research on the internet and there are various budget build and build such but most were written 3-5 years ago. Parts are outdated new stuff has been developed 3-5 years is a lifetime at today's parts development.

    I have an 01 Trans Am with an LS1 in it right now. I would like to drop in an LQ motor and make it a 408 stroker. Ideally I'd like to see 550ish HP for street/strip application.

    As this is my first full engine rebuild I'll gladly accept any help and advice one can get from a forum. As far as parts go I can't make up my mind on what parts to get because I have a major inability to make a decision and pull the trigger without knowing I made the right decision.

    I have my current LS1 for donor parts. sensors covers etc... I need to pointed in the direction of proven combos to achieve these numbers if possible... I just dont know what manufacturers are good any more. I just really need help making parts decision, developing a cost quote so I know what im looking at and pulling the trigger

  2. #2
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    Red
    99 Z28

    There was an article in GM high tech not that long ago where they built a lq 408.

    wesico stroke kit
    L92 heads
    FAST intake

  3. #3
    Junior Member
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    wesico a good kit to pickup? I know sometimes various builds use specific vendors that may not be the best choice because they are "sponsors" I dont know much about wesico and their value/performance/reliability

  4. #4
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    Red
    99 Z28

    I have used there pistons in all applications and like them alot. They are decently priced but I dont have any personally experience with them.

  5. #5
    cutting and welding mark21742's Avatar
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    hugger orange
    2004

    Just remember the 60 extra cubes will really eat up camshaft duration, so you will want to look at larger duration came for a stroker than the cam choices for a stock cube 346.

    I'm running a 255/263 .624/.624 115 lsa cam in mine and it has decient street manners.....also with larger cams youll have a later intake valve closing point so you will want to run a higher static compression to keep the engine snappy.....I'm running 12.5:1 static compression, but intake valve closes later in the compression stroke so I ended up with 8.25:1 dynamic compression.

  6. #6
    Senior Member 2001camaroSS's Avatar
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    Light Pewter Metallic
    2001 Camaro SS

    My buddy did an LQ9 408 stroker last winter. I will get some info from him.

  7. #7
    Member TA98's Avatar
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    Black
    1998 Trans Am

    ^^^^please do.

  8. #8
    Senior Member 2001camaroSS's Avatar
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    Light Pewter Metallic
    2001 Camaro SS

    Its a 408 longblock 6.0 iron block bored .30 over (built by AES), trick flow heads 225cc, yella terra rockers, ARP head bolts, Eagle H beam rods, 11.8:1 comp, comp custom grind cam, and ls6 intake, kooks 1 7/8, ory, corsa cat, back full BMR suspension, strange 60.

    Here's a video of it.

    Last edited by 2001camaroSS; 01-02-2012 at 01:11 PM.

  9. #9
    cutting and welding mark21742's Avatar
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    hugger orange
    2004

    ^ sounds good!

    I went with Mahle flat top pistons (-4cc valve reliefs), H beam rods, 4"crank, king bearings.
    Had the 03 6.0 align bored, punched .030 over, and decked.
    Hand ported my stock 241's, milled .040" off of them (this time) and valve job done....57cc chambers.
    Comp cams 255/263 .624/.624 115 lsa cam
    Edelbrock proflo xt (hand ported)
    60lb motron injectors
    FAST 90mm tb
    Fuel cut set at 8,000 rpms now, and motor is still pulling hard when it hits fuel cut off

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