So I'm days away from reinstalling my hot cammed LT1 back into my Firebird and I made a couple of changes from the last setup I had programmed for. That being a bump in compression from 10.1 to 10.5 and a B&M 2800-3200 converter on the 4L60e transmission. Do you think I can drive it around without getting the ECM retuned promptly, or should this be done before it hits the road. Thanks for your time!

 

Drive it and see how it is. The change in compression and increased stall isn't going to require large changes in the tune. At least the engine tune, it is possible that the transmission lockup and shift points could be adjusted to take advantage of the higher stall speed.

Not sure how much torque management is in the PCM you are using. That could likely need to also be changed.

RBob.

 

PCM for Less did the last tune on it. I was mistaken on the stall speed of the torque converter, as its a B&M 70419, it has a stall speed of 2500rpm at 230 lb ft. I'm guessing my engine will push the stall up to 2800rpm.