Ensuring proper fuel pressure with an inline fuel pressure regulator

Our Bugeye Sprite was originally equipped with twin SU carburetors and a mechanical fuel pump that provided the necessary 1.5-3.5 psi of fuel pressure. We installed an electric fuel pump that provided 3-5 psi of fuel pressure to our larger, single SU.

[How to get enough fuel to our supercharged Sprite]

As we learned, those two ranges aren’t close enough. Now cut to a scene of fuel pouring out of our new carburetor.

The easy solution: We ordered a Mr. Gasket inline fuel pressure regulator and set the pressure to about 2 psi.

Problem instantly solved. 

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Noddaz PowerDork
5/17/24 1:08 p.m.

Can that actually be mounted somewhere?  Or does it just bounce around?

BGarlandJr New Reader
5/17/24 5:26 p.m.

Had one very similar to this (maybe not the same brand), but it had a sudden fuel leak when a rubber diaphragm developed a hole spraying gas over a hot engine.  I have reason to believe THIS STYLE is safer.

William Colom
William Colom New Reader
5/18/24 11:05 a.m.

In reply to BGarlandJr :

Agree. Holley anything is better; designed for racing.  I used one in my Lotus 47 (45 Webers) and full race TR4 (with 45 Webers and SU's) both with fuel pressure gauges

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