Fuel Pressure Gauge On 440 Six Pack?

[70sixpkrt]

I want to install a fuel pressure gauge on my 440 sixpack but don't know where. Has anybody installed a fuel pressure gauge on a Six Pack setup? Any pics? Thanks.

 

[TN Mopar]

I used this in front of the Carbs
only don't use a liquid filled gauge

 

[70sixpkrt]

I used this in front of the Carbs
only don't use a liquid filled gauge

View attachment 1241074

Why not use a liquid filled gauge? Where did you attach it since it is a hard fuel line from the carbs to the vapor separator?

 

[33 IMP]

Temporary or permanent? Under hood, on the cowl, or inside the car? Mechanical or electric? Real Sixpack car where you want to keep the stock lines, or something that can be modified?
Edit: I can help more with some more information.

 

[70sixpkrt]

Temporary, stock lines, under hood, Carter 6903 fuel pump. I have extra six pack stock lines.

 

[33 IMP]

Okay, temporarily remove the hard line from the pump to the first tee, put a hose barb in the tee, and use a rubber hose and the set up TN Mopar shows.
There are other more permanent ways, but if you just want to see what your pressure is, the above way will work.
(I have an autometer isolator so I can have a mechanical fuel gauge in the car, and I have a liquid filled mini gauge like TN shows, directly mounted to my holley secondary bowl, for underhood adjustments)

 

[TN Mopar]

The reason I said not to use a liquid filled gauge
is the liquid gets hot that close to the engine and the gauges dont read well
I went through several before I figured it out

and 33 IMP is correct
replace the hard line
put a barb in the first brass block
I made a hard line to replace the factory one
but it was shortened to fit the gauge block with as little rubber line as possible

 

[70sixpkrt]

The reason I said not to use a liquid filled gauge
is the liquid gets hot that close to the engine and the gauges dont read well
I went through several before I figured it out

and 33 IMP is correct
replace the hard line
put a barb in the first brass block
I made a hard line to replace the factory one
but it was shortened to fit the gauge block with as little rubber line as possible

Any pics of the hard line you made?

 

[TN Mopar]

Any pics of the hard line you made?

Unfortunately no
I used the 6 pack years ago
and I think I sold it for about $500 in the 90s
(OUCH)

I run a Tanks Inc EFI tank, an in-tank electric fuel pump, steel braided line & return line, and a Thumper Carb now

 

[RJRENTON]

Curiosity question: WHY do you think you need a fuel pressure gauge? If its being installed under yhe hood, how will you read it...especially while driving? Static pressure readings (idle and low speed operation) are relatively useless, other than determining the pump is functioning. I would assume you think you have a fuel delivery (volume) t MAXIMUM engine RPM levels, such as racing and you feel you are "running out" of fuel? If so, its a delivered volume issue not a pressure issue.
Commenting on the liguid filled gauge: the liquid provides a slight pulsation dampening effect. To eliminate a bourdon tube (the gauge's internal pressure sensing element) rupture, due to the severe pressure pulses coming from the mechanical pump's operation, a isolation device installed b4 the gauge, to prevent a catastrophic condition should the gauge internals fail. Just asking the question to better understand your issue.
BOB RENTON

 

[70sixpkrt]

I would like to find out what my fuel pump is pushing out.

 

[Carcinogen]

You need something like this https://www.summitracing.com/parts/hly-26-503
then you can mount gauge inside and watch pressure while driving.

You don’t want fuel hose going into cab

 

[cj's mopar]

Can one of the brass tee's on the carb be drilled and tap for 1/8 inch pipe and screw guage in ?

 

[70sixpkrt]

Can one of the brass tee's on the carb be drilled and tap for 1/8 inch pipe and screw guage in ?

I was thinking about that since I have extra brass tee's.

 

[33 IMP]

Can one of the brass tee's on the carb be drilled and tap for 1/8 inch pipe and screw guage in ?

Yes, but that's kinda permanent. Op is just looking for a temporary test. Though, if he can find another tee in a hardware store..... it could be installed, and then removed. It would need a 90° elbow to be read though.

 

[RJRENTON]

Can one of the brass tee's on the carb be drilled and tap for 1/8 inch pipe and screw guage in ?

To drill and tap for A 1/8″ NPT female fitting, the tap requires an R-shaped drill bit. The R drill bit corresponds to a size of 0.339 inches or 8.61 mm. There is not enough area on the back side of the standard Weatherhead T fitting, without, IMO, weakening the fitting.
BOB RENTON

 

[cj's mopar]

I am sorry what is a R shape drill bit?

 

[RJRENTON]

I am sorry what is a R shape drill bit?

It's just the size designator.....twist drills come in fractional sizes: /8", 1/4" etc, numeric drill sizes #1 thru #80 and letter drill sizes . See the included list. All you wanted to know about twist drills.

BOB RENTON

 

[cj's mopar]

I see thanks for info!

 

[Bee1971]

I just gorilla taped the fuel pressure gauge to the OUTSIDE of the windshield so I could see it in front of my face

My motor was shutting down at 5,000 RPMs or so , and I wanted to make sure it wasn’t losing fuel pressure on the mechanical pump versus ignition related