It would be worthwhile to check pressure in the return lines as it can affect your timing and fueling as much or more as the inlet pressure.
It would be worthwhile to check pressure in the return lines as it can affect your timing and fueling as much or more as the inlet pressure.
Checking at idle would be good than no data, but if you can rig up a way to read it when driving even better.
Spec is less than 5 psi is acceptable for return pressure
Idle with cold advance on, the gauge is saying exactly 2psi on the return line, branched off of the 3/8" PEX tee.
Well how bout that. I'm with others in the belief that the closer to 0 your return pressure is, the better.
Try measuring it with the throttle wide open and see what you have. Me thinks that might be your lack of power at high speeds issue.
That pex tee is towards the rear by the tanks right?
By forcing it to make a 90* turn, you're making the flow slow down which increases pressure.
The fuel bypassed by the injection pump should increase with rpm, loaded or unloaded, and I'm thinking that increased volume will show up at your higher rpms with higher return line pressure.