Got the Racetronix pump installed. Still loseing some pressure at WOT. Goes from 60 to about 56. Its better than before though.

 

Another thing I was once told to check is if the tank is inadequately vented. Eliminate this as a possibility by doing a run with the gas cap off, or loose.

 

Still losing pressure at WOT. Would the Racetronix hotwire kit help this? Also concerding having my stock fuel rail and FPR modded to work with the TBSS manifold. Only concern with that is I'm only pulling about 10-11 in of vacuum at idle.