Vaporworx / Rick's Tank Problem - dropping fuel pressure at high rpm?

[carbuff]

Carl,

Thank you for responding with so much information! Of all of the suggestions that you have provided, I think the following may be the one I need to focus on:

Originally Posted by CarlC

You may also want to check that the wire gauge to the relay(s) is 14ga minimum and that there is not a large voltage drop to the relay output. The Gen5 LS3 pump needs 12 amps.

I'm using the 'relay' from the Holley HP EFI kit, which supposedly will source 10A. I do have 12 or 14ga wire, I don't recall which at the moment. I unfortunately do not have a good way to measure the actual voltage at the pump itself, but if it requires 12A, then it's very possible that I have a limitation on the available current. I did not run an extra relay for the pump itself, since I was under the impression that the HP EFI could source it. That may be my mistake.

If I'm going to dig back into this wiring, then it may be a good time for me to go ahead and install your PWM controller instead of just a relay. I don't think it was available when I made this original purchase, which is why I don't have one now...

I will contact you via PM about acquiring one...

Thanx again!