konceptracin

Me and A friend bought 2 precision converters from a local trans shop....i got a much tighter/smaller stall and he got the bigger/biggest one they offer...his is installed and at the track today it seams like his was flashing at really low rpms....I still have mine in the box...is there any way to identify the stall speed on the converter...some sort of stamp???? I think they mixed them up!
they are th400-ls1 Precision Industries Vigilante


thanks for your help