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need nitrous help for my 408

This is a discussion on need nitrous help for my 408 within the Nitrous forums, part of the LSx Technical Help Section category; were putting a 408 on a yukon and i want to figure out how much spray i can run .... ...

  1. #1
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    white
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    need nitrous help for my 408

    were putting a 408 on a yukon and i want to figure out how much spray i can run .... i am thinking of shooting 200 to 250, can i spary more?

  2. #2
    Nitrous Tuner LS2Tuner's Avatar
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    First off we need alot more info to answer your ?.

    What is in the 408. . . . . . . . . . ?
    crank
    rods
    pistons
    ring gap
    cam
    head gasket's
    etc.

    Also what type of fuel system do you have?

    Stock engine management?










    Welcome to the site!
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  3. #3
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    white
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    i changed the pistons from 408 to 427
    afr heads 66cc
    ring gap 30
    cam not sure yet but no less than .600lift
    fuel 98octane
    lsx block

  4. #4
    Powerstrokin LT1 > LS1's Avatar
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    if its got a forged crank, and forged rods, it should be good for a 250 shot.


    remeber, you need to pull a good bit of timing out when on 98 octane

  5. #5
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    white
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    is it still safe to spray over 300

  6. #6
    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by q8LSX View Post
    is it still safe to spray over 300
    You still haven't answered enough about the motor to really answer that.

  7. #7
    TunedbyFrost.com Tuner Frost's Avatar
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    Americans guys reading, please keep in mind that their 98 is like our 93 octane...

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