Fuel Pressure Gauge Location

[70SwingerGuy]

Ive determined that I need to put a fuel pressure regulator on my motor, so I have a question: My fuel pressure gauge is mounted inline up near the carb, as circled in the picture, I will be mounting the regulator on the inner fender, also circled in the picture, so is it better to have the gauge mounted on the side of the regulator, or is it fine to leave it where it is? The needle seems to be a bit bouncy where it is, Im thinking it may be more stable mounted on the regulator itself.
Thanks FABO

 

[mopar head]

I`d leave it.

 

[Johnny Mac]

Ive determined that I need to put a fuel pressure regulator on my motor, so I have a question: My fuel pressure gauge is mounted inline up near the carb, as circled in the picture, I will be mounting the regulator on the inner fender, also circled in the picture, so is it better to have the gauge mounted on the side of the regulator, or is it fine to leave it where it is? The needle seems to be a bit bouncy where it is, Im thinking it may be more stable mounted on the regulator itself.
Thanks FABO
View attachment 1716388824

After going through this same thing, years ago, here is what I concluded.

Non liquid filled gauges bounce like monkeys. Some worst than others. For this reason, I only run liquid filled.
That being said, liquid filled can read a few psi low, once they heat up.

Inexpensive ones of either kind, have a pretty limited lifespan.

I mount this liquid filled gauge on the regulator, on the inner fender, in the same spot you circled. Keeping it away from the heat of the engine. It's been on there for years.

Ours come right down the same line as some very popular, high end, well known brands.

Liquid Filled Fuel Pressure Gauge - 0-15 psi

 

[mopar head]

What I use also.

 

[70SwingerGuy]

@Johnny Mac Thanks for that information, it makes sense to me now to run it on the fender away from the heat and excess vibration, my gauge is liquid filled, yet still seems to bounce more than I think it should. This is what I am using, do you have any thoughts on it?
Performance World 5215B 0-15PSI Liquid Filled Black Fuel Pressure Gauge. 1.50'' Diameter. 1/8'' NPT

 

[Newbomb Turk]

Those little gauges are very inaccurate.

The best way to mount a fuel pressure gauge is to mount in in the cab so you can see it.

Just looking at your fuel pressure with the car sitting still doesn’t tell you anything.

To mount it in the cab you need a fuel pressure isolator because you do NOT want a line with fuel in it inside the cab with you. EVER.

The isolator keeps the line with fuel in it separate (isolated) from the carb side to the cabin side.

On the cabin side you use an antifreeze mix from the isolator to the back of the gauge.

 

[fishmens67]

The isolator keeps the line with fuel in it separate (isolated) from the carb side to the cabin side.

I use to mount the gauge on the cowl until I discovered the isolator and could afford it, now its right next to the tach on the dash along with the oil pressure gauge.
I like being able to see the gauges easily. My engine shuts down if the oil pressure drops below 7 psi.

Those little gauges are very inaccurate.

Liquid filled gauges in the engine compartment are inaccurate when the liquid heats up, heat up fast from header heat.

 

[70SwingerGuy]

Those little gauges are very inaccurate.

The best way to mount a fuel pressure gauge is to mount in in the cab so you can see it.

Just looking at your fuel pressure with the car sitting still doesn’t tell you anything.

To mount it in the cab you need a fuel pressure isolator because you do NOT want a line with fuel in it inside the cab with you. EVER.

The isolator keeps the line with fuel in it separate (isolated) from the carb side to the cabin side.

On the cabin side you use an antifreeze mix from the isolator to the back of the gauge.

I've never heard of that before, thanks for the info. I did some reading up on it, pricey, but quite a brilliant solution, no pun intended ;)
Can these be used with any fuel pressure gauge?

 

[Daves69]

..........Can these be used with any fuel pressure gauge?

I would think so if you have the correct fittings.

Reviewing some install instructions may help if you haven't yet......

https://www.autometer.com/pub/media/manual/2650-1930.pdf

 

[70SwingerGuy]

I would think so if you have the correct fittings.

Reviewing some install instructions may help if you haven't yet......

http://[URL]https://www.autometer.com/pub/media/manual/2650-1930.pdf

[/URL]

Thanks Dave, I did do reading on them and just thought Id check in case I missed something, thanks again

 

[Demonx2]

Oh c'mon now...fuel pressure gauges belong on the cowl just like they were in the 60's/70's.

Oops...you can tell my age....(and see where my gauge is!!)

 

[70SwingerGuy]

Oh c'mon now...fuel pressure gauges belong on the cowl just like they were in the 60's/70's. View attachment 1716389104

Oops...you can tell my age....(and see where my gauge is!!)

I always thought that gauges looked the coolest when mounted on the cowl!
And now you can tell my age too

 

[MadScientistMat]

I've never heard of that before, thanks for the info. I did some reading up on it, pricey, but quite a brilliant solution, no pun intended ;)
Can these be used with any fuel pressure gauge?

Yes, as long as you can adapt the threads.

 

[Johnny Mac]

@Johnny Mac Thanks for that information, it makes sense to me now to run it on the fender away from the heat and excess vibration, my gauge is liquid filled, yet still seems to bounce more than I think it should. This is what I am using, do you have any thoughts on it?
Performance World 5215B 0-15PSI Liquid Filled Black Fuel Pressure Gauge. 1.50'' Diameter. 1/8'' NPT

That one seems expensive to still be bouncing. I would give the BluePrint engines one a try. Mine doesn't bounce at all. I suppose if your pump us a pulse type, that could add to it. Mine is a rotor.

As I see mentioned, you could also run one in the cab, but you can't have a fuel line in the car, and most don't do that correctly. I have rigged one up temporarily, and then removed it after confirming it was doing what I wanted. I used a magnet base on the cowl in that scenario, like that good looking demon in the pics. I just removed it when done.

 

[340six]

Those little gauges are very inaccurate.

The best way to mount a fuel pressure gauge is to mount in in the cab so you can see it.

Just looking at your fuel pressure with the car sitting still doesn’t tell you anything.

To mount it in the cab you need a fuel pressure isolator because you do NOT want a line with fuel in it inside the cab with you. EVER.

The isolator keeps the line with fuel in it separate (isolated) from the carb side to the cabin side.

On the cabin side you use an antifreeze mix from the isolator to the back of the gauge.

My Autometer came with isolation. It also read same as the one I had at carb.

 

[70SwingerGuy]

That one seems expensive to still be bouncing. I would give the BluePrint engines one a try. Mine doesn't bounce at all. I suppose if your pump us a pulse type, that could add to it. Mine is a rotor.

As I see mentioned, you could also run one in the cab, but you can't have a fuel line in the car, and most don't do that correctly. I have rigged one up temporarily, and then removed it after confirming it was doing what I wanted. I used a magnet base on the cowl in that scenario, like that good looking demon in the pics. I just removed it when done.

Hey Johnny, thanks again for the info. I may just do that, even with exchange, that gauge is inexpensive enough not to break the bank. Does it come in black? And I never thought about using a magnetic base to mount a gauge on the cowl, Ill have to look into that to see where they can be purchased.

 

[Newbomb Turk]

My Autometer came with isolation. It also read same as the one I had at carb.

Did it read the same under load, and if so how did you read it?

 

[Johnny Mac]

Hey Johnny, thanks again for the info. I may just do that, even with exchange, that gauge is inexpensive enough not to break the bank. Does it come in black? And I never thought about using a magnetic base to mount a gauge on the cowl, Ill have to look into that to see where they can be purchased.

Face is black. Body is a dull stainless.