Quote Originally Posted by Bio248 View Post
i bet in the summer youll only get 9-10 psi. a stock pulley wouldnt be a bad idea in the winter, but its up to you. having the 3.4 on was pointless in the snow for me.
I was getting upwards of 8 on a stock pulley in the middle of summer, so it would probably be more. I have no idea why my internals flow so poorly. It dropped down to that after I put the plog/DP on, and before that I saw 9 psi on the stock exhaust w/ stock pulley. I just have a non flowing, high psi *****. If it is tuned for the 3.4, can I just switch to the 3.8 and not worry about the tune or will it run rich as hell?