Open loop in 87 performance tune??

[twintips_17]

Originally Posted by JackandJanet

My limited understanding of all this is you are in closed loop as long as the engine is fully warmed up and you don't get into the WOT throttle position.

I've noticed, now that I've got a Gryphon updated to show "gears", that the torque converter WILL NOT lock until things are all warmed up.

- Jack

I read somewhere that the torque converter won’t lock until the transmission reaches over 100 degrees.

Driving in Montana I can tell that it defiantly takes a bit before it will lock due to the cold weather.