I did a quick experiment today to determine the difference in boost levels I'm getting between the 65mm and 61.9mm pulleys. Both runs were made within an hour on newly installed intake gaskets. I was a little surprised at the results. By the way, disregard the timing, as this is a nitrous tune, but I wasn't spraying. The temp was 72-75F on each run and the IAT's were almost identical.


65 mm - 16.7 psi
61.9 mm - 17.7 psi

Has anyone else logged a comparison? Also, check out the LTFT's. Not too shabby for running 550cc inejectors.

Here's the 65
65mmpulley_zps60882718.jpg



And here's the 61.9
619mmpulley_zps5c4c7ab3.jpg