Where to find FI Fuel Pressure Gauge? Options

[Spoke]

I'm looking for a fuel pressure gauge to check my 71 D-Jet fuel pressure. Pelican has a kit to test FI fuel pressure but I was looking for a simple gauge that I could permanently attach to the fuel line.

Pelican FI Fuel Pressure Tester

[Spoke]

I bought the HF master kit and checked the fuel pressure. During the 2 sec pump run and running, the pressure was 27 lb/sq-in.

Is this ok or should I adjust it to 28.4-29.6 as per the repair manual?

[Cap'n Krusty]

I bought the HF master kit and checked the fuel pressure. During the 2 sec pump run and running, the pressure was 27 lb/sq-in.

Is this ok or should I adjust it to 28.4-29.6 as per the repair manual?

It's not likely to reach full operating pressure in the 1.5 seconds of pump running you get when you turn the key on ....................

Obsession with irrelevant minutiae is often caused by a lack of understanding of how things work. I get phone calls all the time from 356 weenies who want to know measurements that they can't find in the books. They cant find them because they aren't in the books, and that's because they're meaningless and Porsche didn't care what that particular spec was.

I have to tell you that in nearly 40 years of working on 914s I think I've replaced ONE fuel pressure regulator, and had to adjust maybe 3 or 4, probably because they'd been futzed with. If your fuel pressure isn't what it should be, odds are it's a bad pump (low pressure) or a pinched line (high pressure). Incorrectly connected hoses fall in there somewhere, but the car usually won't run in that case. Oh, and the most common fault: someone's been in there before you ................

The Cap'n

[Prospectfarms]

Obsession with irrelevant minutiae is often caused by a lack of understanding of how things work.

The Cap'n

I like that observation and sometimes recognize it in myself. The Cap'n describes "Sophmoric:" ...overconfident of knowledge but poorly informed. ... Merriam Webster. Engines are complex and my intellect is not very, and I tend to hang on tightly to familiar but inapplicable concepts when facing the unknown. However, given that everywhere you look someone has written how important fuel pressure is to tuning a 914, Spoke's question is not irrelevant minutiae.

Tom raises a good point -- over-reliance on an unreliable tool. For $20 I would not expect a HF gauge sufficiently calibrated to indicate a 7% variation from FP specifications. My rule for HF is only things with three or fewer moving parts and have no measurement function. For me, the value of the HF gauge would be to indicate fuel/no fuel, or, once the motor is running right, establish a baseline pressure # for that gauge.