Treerotor

Hey there. Just picked up a new rig (1983 GSL Street Port). I'm getting way to much fuel pressure to my Holley carb (8psi). As it sits I have a Holley FPR with a return line goin' (stock 1/4"). The FPR isn't regulating low enough. So I check out racing beat and saw the Holley FPR they have suggested is only using one of the two outlet ports (identical FPR). Do I need that bypass line? Or should I go with the aforementioned capped outlet?

diabolical1

iTrader: (3)

welcome to the board.

do you have a photo or part number for the regulator you're referring to?

Treerotor

Thanks! My bad, I definitely should have included that!
https://www.racingbeat.com/RX7-1975-...tem/18153.html
(Line to the left is the return)

Regulator setup in question.

diabolical1

iTrader: (3)

is that photo of your car current? if it is, i am a little confused because that looks like a Weber, not a Holley.

it's been a while, but that regulator looks like the Holley one i had on my car. the problem is that they made two regulators that looked identical - one regulated between 1 and 4.5 psi, the other between 4.5 and 9 psi - if you got the one in the RB link you posted, then you have the higher one, and with a Weber, you'll never get them to play nice with each other. you'll need to get the other one.

https://www.summitracing.com/parts/h...RoCssgQAvD_BwE

i used it with my Dell'Orto and it worked perfectly.

Treerotor

My bad on that. Yes it is a Weber carb. I must have been thinking about the FPR when I typed Holley! Thanks for the solid info!