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Is the '98 Z28 LS1 ECU that different?

This is a discussion on Is the '98 Z28 LS1 ECU that different? within the Computer & Tuning forums, part of the LSx Technical Help Section category; Originally Posted by 9t8z28 SD stands for Speed Density right? But what does OLSD stand for? Open Loop Speed Density......no ...

  1. #21
    Veteran 0rion's Avatar
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    Quote Originally Posted by 9t8z28 View Post
    SD stands for Speed Density right? But what does OLSD stand for?
    Open Loop Speed Density......no O2's and no MAF.

  2. #22
    LTX N20LT4's Avatar
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    Quote Originally Posted by 0rion View Post
    Open Loop Speed Density......no O2's and no MAF.
    That's the way my tuner tuned my ECU - an Engine Management Systems 8860 unit, it's a open loop sys, no sensors. The '92-93 PCM is not the best.
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