Recommendation on fuel pressure regulator for return line on dual carb Options

[Tdskip]

Hi folks end hope everybody’s having a decent Saturday.

I need to button up another project car that was previously (long time ago and original engine long gone) a fuel injection car so it’s got the return line like they all do.

It looks like many of you like to use a pressure regulator in the return line, rather than simply capping it off, and I was wondering if there’s a specific regulator that you would recommend or if a Holley rotary dial to select pressure unit is fine to use.

Thanks!

[technicalninja]

Be careful here!

What many have alluded to are simple single input/output no return line regulators.

A regulator that is designed to return fuel to the tank is a different creature.

Make sure which one you have.

Simple type are direct feed before the carbs and only feed the carbs. You might have a tee past it to feed a pair of carbs. There will be no return to the tank.

The return line style will be installed past the carbs.

The return line style are better IMO but have more leak points and more complexity.

Making 200+ HP and require significant flow the return line style is what I'd use.
Everything would be expensive.

A common streetcar with below 150hp I'd try the simple one first.
Everything would be on the cheaper side of things.