Cam stalling on decel

[Bert1190]

So I have a tsp cam 226/236 114lsa with a stock converter. So driving from light to light the car almost wants to stall coming to a stop and Roma drop to like 500 and then come back up to 850. Can I raise my min rpm or change spark on coastdown ?

[Phil@PnP Tech]

More than likely it's CT downshift torque management killing the timing during the shift.

#1. Make sure min idle airflow is correct for all gears. Probably needs more airflow for the cam.

#2. Verify closed throttle downshift speeds are correct. Cam is going to want to idle a little higher. Downshifts need to happen sooner so increase the downshift speed.

#3. Decrease the shift time.

#4. Make sure your min idle vs vehicle speed makes sense.

If it is still clunky, disable CT downshift torque management.


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[Napalm]

Thank you I needed to read this too.

I have the LS3 Hot cam from GM performance in mine and I have a similar issue. It doesn't want to stall perse but it bumps around a bit.

trans really doesn't like it and I keep hearing oh you must have a ______ stall. but I then hear - you need to retune the trans, which makes alot more sense.

It does stall out if I try to hit the gas from a stop - but I have other issues I think.