Should never downshift on a dyno run. Either way, keep us posted I'm curious to see new numbers with the 3.4!

 

New dyno run, 221hp and 268 torque. Just doesn't seem to gain hp, just torque.

 

What's the charge temps? If he is datalogging these runs ask him if it's pulling timing do to the air getting hot because of the supercharger. Maybe time to intercooler it or meth to keep temps down to increase timing and make power