I just swapped out my fuel rail gauge it has been in service for about 5 years the inside oil has turned a darker shade of tan but it has not leaked , i got from summit racing.
I installed the correct cap and ball.
Just wanted to see if anyone else is gonna keep the gauge on the engine or remove and use for testing

 

I just installed a sensor in my car (ordered before the thread started), and put a gauge in the car.

However on my other 928 I will leave it in there. I will however replace the gauge once every two years or so just because.

 

Never had one.

 

I've never considered installing and leaving one on. My GT engine came with one of Roger's gauge kits. I'm going to talk with Rog and figure out how to deal with it but I'm thinking to remove it.

 

Keepin mine. I have an aftermarket aero motive regulator and a autometer gauge ( 1.5 , direct mount , liqued filled) Two years in abq heat. No issues

 

I am leaving mine in place

 

I am thinking that a sensor, wired into one of ST2's aux inputs and able to be logged during WOT testing, would be a better answer in all respects.

Cheers,

 

I've never figured out why people need this information....so I've never used one, personally.

If I need to know the fuel pressure, I hook up a 4" certified gauge that is accurate within a half of a pound...at the worst case. I set the fuel pressure where I want it (in the cases where it is adjustable) and forget it.

In the cases where the fuel pressure is not adjustable....I have even less need for a permanent gauge....what the hell am I going to change if I don't like the fuel presssure?

Those cheap little gauges can be off as much as 10 pounds....I can guess the fuel pressure closer than that.

 

I used mine to trouble shoot my fuel pump / rough running issues, I left it on.

However, I have now removed it and replaced with the the ball and cap.

Now, i'll need to get a new fuel rail cover as mine has a section out the front

 

Likewise. My PO cut my rail cover

 

I see no reason to keep a permanent gauge on. I connect the gauge for diagnostics, only.

 

I may still have the look up tables for the Autometer...pretty standard 5 v chart if i recall. I had it set up like this for a while when loging my fuel pressures with my Innovate LM-3..Aux box etc.

The remote gauge is obviously a better way to go as you can sit in the car and view it..but as far as a leak source, its only as good as the job you do installing the remote sensor on the rail. I also am curious as to the cause of Randys fire...Gauge...or tapped rail nut with teflon tape..or rated paste?

 

Gotta a respectfully disagree. It depends on the application and quality you buy.. Stock car etc..i see no real need for any permanent installation. In the old "pre shark tuner" days when we were increasing fuel pressure with boost, the fuel pressure gauge was a great source of info for me to see where my fueling supply was at....vs boost..duty...rpm...AFR..etc Is my AFR wrong due to the rising rate of the of the fueling ...or is the fuel pump being maxed out..... are my injectors at max duty with not enough pump???...tuning has been and still is a steep learning curve for me, I dont know it all, thats for sure, but being able to a view a gauge as I drive and log the results has been invaluable to me.

 

I also got mine from Summit Racing. I'm wondering if there's any real differences between the vendors/guages. I.e., I noticed Carl still has his on the 928 Motorsport site and it says:

The Kit: We provide you with a high-quality glycerine-filled fuel gauge that you can permanently attach to the fuel rail with the fitting supplied. This special fitting has the correct metric threading on one side, and the correct gauge threading on the other. An O-ring is provided for a positive seal. Gauge does not require any wiring, and is HD industrial grade, durable and designed for years of use.

 

I am leaving mine on all my cars. As of today I am not comvinced it was the gauge that failed. However for saftey sake I have removed my kit from the market unless it is used for testing purposes only.

Having talked to the various gauge manufactures about different specs for types of gauges for our application in the less than $50 range they are all the same. Defined by diameter, connection size and position, pressure range, color of gauge, metal or plastic. Bourden material seems to be the same in all at this price. All mine have been filled with either glycerine or silicone to dampen the needle occilations. Most will not spec for gasoline for liability reasons. Unless the medium being tested is corrosive all liquids will work.

About seven years ago Jim Mayzurk, Ernie Swersky and myself drilled and tapped the original cap on the fuel rail and attached a pressure gauge that we bought from Grainger for about $8. Mine is still on my car today and so is Jims. Sounds like Ernie's is still there as well H. 928sRus was still a twinkle in my eye at that time.

Judjing by how many use a fuel gauge on the car relative to the number of reported failures - a very safe product. A lot safer than water pumps!!!

If you prefer to keep the gauge on the car then I would recomend changing the gauge and checking the connection every couple of years. Gauges are cheap relativly speaking (Autozone sells for $9.95). Better to be safe than sorry.