I have an ADS superchip in my relatively stock 92 RS with a 305 TBI. I know this chip only works at full throttle but how much does it advance the timing when it does kick in? And also, considering the answer to this question, how much could the timing on the car be adjusted manually and still not overdue the timing at full throttle?

 

4 degrees is a nice number for me. Factory set is 0 so it's easy>>>>no numerical mistakes. The chip might need to come out if you bump up the timing to 4 degrees because "manually" advancing means advanced all the time.

------------------
Alex (AKA chevyboy) '91 RS 327 stroker, trans-go shift kit>> manual valve body, cat-delete, MSD (ignition, coil, 2-step, timing retard/ advance),Flowmaster, complete Edelbrock suspension including shocks, struts and lowering springs. CRAGAR drag wheels. Lowered 2.25" in front and 1.5" in rear....Best E/T 12.84 @109 mph...(got spray?)plus more!!

 

Most of the aftermarket chips are border line laughable for what they charge and do.
Some rely on running a 160dF for the sole timing and fuel changes.
Some add like 8d timing every where and add 8 degrees to the retard limits, net gain you might see a few degrees extra, BUT the knock sensor always pulls out a few degrees more then a properly tuned chip would be running.
Needless to say after buying a bunch of aftermarket ones with no real gain, I started doing my own