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Thread: Supercharger for VFSS

  1. #16
    Wonky's Avatar
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    Re: Supercharger for VFSS

    Only if one falls into my lap from heaven.............

  2. #17
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    Re: Supercharger for VFSS

    Would go well on your LS3 Gary!


  3. #18
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    Re: Supercharger for VFSS

    We all seem to crave more power on here, but how far past 400rwkw can you safely go without forged internals on these motors?

  4. #19
    Micks is offline Permanently Banned Last Online: 19-12-2021 @ 07:11 AM
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    Re: Supercharger for VFSS

    Quote Originally Posted by BLACK 346 View Post
    We all seem to crave more power on here, but how far past 400rwkw can you safely go without forged internals on these motors?
    I agree Rod, if you look at the LS3 & an LSA engine, they both share the same cubes but that's about it. Be a brave man charging an oldish LS above 400rwkw without addressing the bottom end, oil system etc.

  5. #20
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    Re: Supercharger for VFSS

    Quote Originally Posted by Micks View Post
    Be a brave man charging an oldish LS above 400rwkw without addressing the bottom end, oil system etc.
    As long as the tune is safe I would be more worried about the rest of the drive line.

  6. #21
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    Re: Supercharger for VFSS

    Quote Originally Posted by whitels1ss View Post
    As long as the tune is safe I would be more worried about the rest of the drive line.
    Yes, that could be the weak point that saves you ��

  7. #22
    Micks is offline Permanently Banned Last Online: 19-12-2021 @ 07:11 AM
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    Re: Supercharger for VFSS

    Yes not many A6 owners hold onto those autos when making serious power, generally opt for the stronger powerglide box

  8. #23
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    Re: Supercharger for VFSS

    Quote Originally Posted by Micks View Post
    Yes not many A6 owners hold onto those autos when making serious power, generally opt for the stronger powerglide box
    I know of one quite serious powered turbo car running a TH400 with around 3.07 (from memory???) diff gears (to help cruising)

  9. #24
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    Re: Supercharger for VFSS

    Quote Originally Posted by whitels1ss View Post
    I know of one quite serious powered turbo car running a TH400 with around 3.07 (from memory???) diff gears (to help cruising)
    Yeah that would be the box to go imo Ed, still retain some road manners and ability to go on long distance trips.

  10. #25
    whitels1ss's Avatar
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    Re: Supercharger for VFSS

    Quote Originally Posted by BLACK 346 View Post
    Yeah that would be the box to go imo Ed, still retain some road manners and ability to go on long distance trips.
    Yeah Rod, I reckon it's the best compromise for a street car that gets used on the streets often.

  11. #26
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    Re: Supercharger for VFSS

    Quote Originally Posted by Micks View Post
    Yes not many A6 owners hold onto those autos when making serious power, generally opt for the stronger powerglide box
    Except those lucky enough to be in WA where Streetquick Performance does a drive-in/drive-out (only) 4L80 conversion which is very strong apparently.

  12. #27
    white lie is offline Considerable Contributor to the Forum Last Online: 05-10-2023 @ 11:01 AM
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    Re: Supercharger for VFSS

    Why does it seem a requirement to lose a heap of gears in order to get a stronger box? Surely one can adapt a 6L90 from a Gen F GTS these days?

  13. #28
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    Re: Supercharger for VFSS

    Quote Originally Posted by white lie View Post
    Why does it seem a requirement to lose a heap of gears in order to get a stronger box? Surely one can adapt a 6L90 from a Gen F GTS these days?
    Could be quite expensive but might well be an option?

    I am wondering if it could be the fact that you would need many more parts in the same size box,
    making more heat, requiring smaller parts which would in theory make the entire box weaker?

    In the old powerglides all the parts are just big & strong.

  14. #29
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    Re: Supercharger for VFSS

    Quote Originally Posted by Wonky View Post
    Except those lucky enough to be in WA where Streetquick Performance does a drive-in/drive-out (only) 4L80 conversion which is very strong apparently.
    Very expensive Gaz?

  15. #30
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    Re: Supercharger for VFSS

    I was thinking of 6L90E too a while ago...
    Some things I found were;
    The 6L90E is longer than a 6L80E. So a tailshaft mod is required.
    A new gearbox crossmember is required.
    6L90E torque converter has a higher stall rpm. It is also a 6 bolt flex plate vs a 3 bolt
    Software update is required in the tune for a different TCM within the gearbox vs a 6L80E.

    Talking to a few Auto builders... the 6L90E isn’t bulletproof. Plenty have gone kaboom and sifting for gold in the trans pan. Yes they are better but still will eventually fail or need a freshen up with big HP and abuse.

    The 4L80E is a stronger box. My bro is bolting one up to a LSX454 in a HK. Beauty of the 4L80E vs a TH400 is that you get a strong box with an overdrive. Great for cruising and getting the RPM down so the motor isn’t revving it’s guts out on the highway.
    VF II MY16 SSV-R Wagon with LSA Blower

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