fuel pressure gauge question

I'd like to install a fuel pressure gauge inside the engine compartment. It appears the liquid filled ones (though recommended over non-liquid filled) are rated only to about 140 degrees Fahrenheit. For reasons I won't go into, my engine compartment probably gets hotter than that. I'm concerned about reliability (yet another source of a potential leak, and then potential disaster...)

Would appreciate suggestions for brand /model within reasonable cost parameters.

Thanks much.

longhorizon

 

I would not for any reason put a fuel pressure gauge on the inside of a ride !!!

 

I like the 1 1/2" Marshall and have used tons of them. I wouldn't get liquid filled, pressure gets inside the case and they won't read right, the liquid filled is handy for a boat etc where bouncing could affect the gage reading but in a hot rod and esp under the hood the only time you can read it is when you are just sitting there, not moving.

 

Electric fuel pressure gauge would be safe , the others might burn down car , house , garage, etc

 

Just curious.... how would you read it driving down the road if it's in the engine compartment?

 

You just need to read it while in the driveway, tuning and initial setup, ie: tri-power.
Holley makes a nice one.

 

I don't believe he's wanting to put the pressure gauge "inside" the car. OP said engine compartment. Stu

 

Could you install a fuel pressure regulator with a gauge? Keep it away from the exhaust manifold.

 

Mount it on the back of your blower !!

 

Thats what they make isolators for, so you can have one in the car and not have to worry about fuel getting into the p***enger compartment.

 

The liquid in the gauges expands with heat. The expansion causes the needle to drop--- giving a false reading of "0" fuel pressure. This drove me (and a friend) crazy until I discovered that by "burping" the rubber plug on the gauge the reading will return to normal.

Other than that problem, I don't think the heat will cause anything dangerous to happen.

 

I have used them on the engine for years without problems , several different cars ?

 

Most of the time I need to see the fuel pressure while driving and under load.
I usually stick it under the wiper so I can see it on a test drive for drivability issues. But that's just temporary

 

i've been thinking of the same thing. i gotta keep an eye on fuel pressure for tri-power.i was just gonna run a regulator. now, maybe gauge too? what brands work best, the price range is all over the place.

 

Exactly.

 

Fuel pressure gauge inside ****pit seems to work fine. My guess is almost every nitro car on the planet uses one...I certainally did. We used a liquid filled gauge and a check valve with a way to "burp" the gauge. At the end of a run we would download the info and actually track fuel pressure vs RPM / time.

 

Thanks guys. Will mull this over a bit more...

longhorizon