Fuel pressure problem

TUFFAZ · 10-25-2007, 06:36 PM

Ok here is my problem.
I am running a 144 lowblower, 750cfm boost referenced mighty demon, -8 fuel lines from fuel cell to -8 fuel rail to carby, holley black fuel pump, barry grant 2 port reg, am loosing fuel pressure at WOT, idles at 7psi but as soon as i nail it it starts to drop, at 5500rpm it is still making power but fuel pressure reads 2psi, all the parts are brand new, just cant work out why it is doing this.
Any idea's, if more info is need i will post it up.
cheers

TUFFAZ · 10-25-2007, 06:36 PM

here is a pic of my setup

EuroRod · 10-25-2007, 08:18 PM

Just a guess, but I'd think you probably need 50-ish psi of fuel to the regulator. Then, reduce it down to 7-ish psi for your carb. Good luck.

Busa196 · 10-26-2007, 12:24 AM

Beautiful ride

- I can't comment on your problem- sorry. You might try the C3 section of this forum. BTW, your sig says that's an '83.....there wasn't an '83 Vette made.....unless I'm missing something

....nevermind, just caught the "Commodore" in your sig.

TUFFAZ · 10-26-2007, 12:41 AM

Quote:

Originally Posted by Busa196

Beautiful ride

- I can't comment on your problem- sorry. You might try the C3 section of this forum. BTW, your sig says that's an '83.....there wasn't an '83 Vette made.....unless I'm missing something

....nevermind, just caught the "Commodore" in your sig.

lol, yeh mate, thought i will give the american forums a go, cant find any useful info on the ozzy sites, seems alot of engines now run EFI and not the old style roots blown carby feed.