AutomagicLS1

iTrader: (18)

My car has 60-62 psi of fuel pressure at idle. The car is making power 390 at 5800rpm then the power curve just flattens out immediately at 5800. As soon as the car goes wot the fuel pressure drops from 60-62 to 50psi. Is this enough pressure drop to cause the car to quit pulling? Also the a/f does not change when this happends if it matters

LT1-DAN

You should have more psi at wot then you do at idle.

Old Geezer

iTrader: (3)

Thats considerable drop.
As for the A/F staying constant, evidently at 50psi f/p, the inj flow is still enough to support the FWHP U R making.

Maybe post data logs??