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LS1 block question

This is a discussion on LS1 block question within the General Help forums, part of the LSx Technical Help Section category; Originally Posted by 0rion the mains don't have windows in them like the 99+ blocks do and the back oil ...

  1. #21
    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by 0rion View Post
    the mains don't have windows in them like the 99+ blocks do and the back oil passages are 2 round holes instead of one hogged out area. Those are the 2 main oiling issues with the 98's and contribute to the spun bearings. That being said as long as you don't spin the motor very high and upgrade the rod bolts I think you'll be fine.
    There is a write up somewhere I'll try to find that shows exactly how to repin for a 99+ pcm. I know people hate the 98 pcms but I can't tell you for me that it's that much of a big deal. I have a 98 heads/cam car and it's what I'm used too. I know there are some differences that might make tuning easier but the 98's can still be tuned.
    i dont mind the 98 pcm..but i know it will limit out(sorry most likely wrong terminology) faster when it comes to forced induction etc ...and the no real time tuning thing would suck too
    Last edited by shady milkman; 10-22-2009 at 12:06 PM.

  2. #22
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    Quote Originally Posted by shady milkman View Post
    i dont mind the 98 pcm..but i know it will limit out(sorry most likely wrong terminology) faster when it comes to forced induction etc ...and the no life tuning thing could blow too
    what do you mean by that?


    The MAF on the 98's does limit out but if you run much boost at all you're going to max them all anyhow no mattery what year it is.

  3. #23
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by 0rion View Post
    what do you mean by that?


    The MAF on the 98's does limit out but if you run much boost at all you're going to max them all anyhow no mattery what year it is.
    there...i edited it..

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