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Launch control tuning problem?

Guest rt1092

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Guest rt1092

I'm trying to set up the launch control to hold the rpms steady. While applying the brakes on the starting line. (Drag Racing). I'm using an automatic trans (manually shifted).

In my garage I can get it to work okay with a muffler on the car, but once I take the muffler off it gets crazy and won't come close to the rpm settings.

My O2 sensor says I'm lean, but when I richen it up 5 numbers it doesn't seem to make a difference.

It only acts up when I in gear in neutral it works great.

Is it possible when under load and on launch control I have to richen it up a lot more?

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