6.5 TD GMT-400
 

Ive posted once before and had great results and wanted to see if some new questions could be awnsered.

1st: ive justed installed a manual wastegate so the turbo whistles once again.its BD brand wastegate and i wanted to know what inches correlates to what psi, reason is i believe the stick turbo i have is only capable of having 8psi boost at tops.

2nd: everytime the truck needs to shift gears while driving i have to let off the gas and let the rpms fall (its an automatic). Dont know if this is a major problem or shitty design for the trans.