How do I change OD settings?

[My_C5]

When the vette drops into Overdrive it like the engine is draged down and no power. The engine sounds like its knocking and pinging but nothing shows in the KR scan. I would like to smooth this out if it is possible. Thanks, Todd

[jimmyblue]

This description seems pretty subjective and I think
you want to peel back a few layers of this onion to
see what's the deal.

Is it just that your car has too peaky a power curve
ans shifts / locks up too low to be happy?

Is there something funky going on with the electronic
throttle (maybe some of those DFCO traction control /
abuse modes?) that cuts power by throttle angle?
Log the TPS across upshifts.

Is the torque spike from the shift giving you false knock,
or the sudden change in operating point giving you real
knock? Log spark advance, KR, burst knock, CylAir etc.
as well as your O2s for any lean drops at shift.

First you find the mole, then you whack 'im.

[My_C5]

Thanks man, I will do some more logging and look into those !