Retune needed after Heads/pulley install since Cam only tune??
 

Had RWTD perform a Cam only tune a few months back, since then i have added PP 243 heads and a pulley, can my tune be off now??? Because i only gained 3 tenths and 2 mph since head swap at the track :( 12.50's to 12.20's and 109 to 111....car still not performing how it should :confused:

Yep, get a retune for sure. Will help to some extent. You might want a proper dyno tune too. Should gain you more than a mailorder one.

yea you should be lean from the increase in ve allowed form the better heads