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Making 600RWHP N/A....With under 427 cubes

This is a discussion on Making 600RWHP N/A....With under 427 cubes within the Internal Engine forums, part of the LSx Technical Help Section category; ...

  1. #1
    Slow'er'Ass Mr. Luos's Avatar
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    Making 600RWHP N/A....With under 427 cubes

    A very difficult task to take on.
    Making 600RWHP, keeping the car fairly streetable, and using under 427 cubic inches.

    I have seen ONE 402/408 make over 600 at the wheels without the use of nitrous or boost. And it was built VERY similiar to this one.
    2001 Trans-Am WS6 M6
    421 Iron Block
    12.5:1
    ETP 255’s
    Rapid Motorsports Dominator Solid Roller Cam
    Jesel J2K 1.7’s
    Beck Sheet Metal Intake
    Fast 90mm
    Pump Gas

    Kooks 1 7/8 x 2 x 3 ˝ stepped headers with off road pipes
    Kooks Y-pipe
    Mufflex 4” catback

    Textralia Twin Disk
    D&D Viper Spec T-56
    Denneys nitrous shaft
    Moser 12 bolt, 4.11 gears

    608rwhp 496rwtq
    That is a VERY intense build.
    I know the 402/408 car that hit 600RWHP was also an M6, and also had a huge solid roller cam.
    2000 C5 Corvette
    408 LS1 11.4.1 Compression HK Racing Engines
    Greg Good Stage MEGA HP LS6 Heads 2.10 Valves
    Custom Solid Roller Camshaft (Specs per Greg Good) around 250/260
    Jessel J2k Rockers
    Greg Good Ported FAST 90mm
    Kooks 1 7/8 to 2" Headers
    3" X-pipe
    Textraila Exo Skel Dual Disc Clutch
    Six Speeds Inc Stage 3 T-56 ( You da man Joe!)
    DTE Stage 3 4.10 Rear End
    19" HRE Wheels
    MAFless Tune
    This dyno is through open x-pipe. Through a B&B Triflow Catback it makes 578 RWHP!
    601 RWHP 513 RWTQ SAE
    See a trend here?? Solid rollers, big cams, and hogged out heads will get you there. Also...the M6 is a requirement. No way an automatic will allow that magical 600RWHP number. Too much driveline loss. Granted, the automatic car will more than likely be quicker.

    The normal all motor 402/408 will make 475-525RWHP.
    Mine is a perfect example.
    402, Fast 90, 248/254 cam, Patriot stage III's, M6, heavy driveline.
    531.1 RWHP

    If the motor is built for a shot of nitrous (and cammed for it) it will lower the HP numbers as well when N/A. But run like a bat outta hell on the juice.


    Just a little info to chew on.
    If you have dyno/track results from 402-427 builds, please add them!! Be descriptive so we can see how you got there.
    Ideas? Thoughts? Been a little slow in the internal section as of late.

  2. #2
    2001 ws6 6-speed david_viny's Avatar
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    Any way this is possible with a hydraulic lifter cam?

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    Kenne-Bell Killer Cayenne97's Avatar
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    Numbers could be there but it would never be "fairly streetable".

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    Those torque numbers seem kinda low....any reason for that?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by david_viny View Post
    Any way this is possible with a hydraulic lifter cam?
    I do not think so.

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    Junior Member Paul Huryk's Avatar
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    Quote Originally Posted by Johns00Z28 View Post
    Those torque numbers seem kinda low....any reason for that?
    Probably due to making peak power around 7,000 rpm

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    Slow'er'Ass Mr. Luos's Avatar
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    See the first mod list I used.

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    yeah I'm an idiot....lol


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