race00

54 chevy with 5.3 6l80e 3600 stall ,motor is stock ecept vinci butt kiker cam ,the ecu is 2010 camaro,trans is 2010 camaro with stall 3600, bought it used it has tune in it already ,ive drove it but it down shifts and up shifts at odd speeds , would it be better to have gm down load stock tune or work from the one in it ,borrowing car till its safe to drive any help would be great

lsexpress

iTrader: (-1)

just to throw it out the maybe the shifts are acting funky cause you don't have ecu tuned for gear ratio and tire size that's currently on the 54 chevy.....