[leeklm]

I am in need of a decent fuel pressure gauge I can mount inside the car vs the POS mounted on my regulator under hood... was looking at this autometer that would match my other AM gauges. Any reason not to use this one on a street/strip car?

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[steve25]

That a lot of money!
I had a SW that used a electric sender which is the type you want, as you do not want to run fuel into the passenger area of the car!

Here's a picture of the sender painted Blue in the right side of the Brass Tee.

Note that I soldered on the needed ground wire to the case of the sender.

[leeklm]

"That a lot of money"

I hear ya! Looking at Summit, there are a few electrical gauges for about 100 less, but they have the 0-100 readouts, which is not great when trying to read 6lbs... on the bright side, there is a $20 rebate

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[janderson]

You didn’t mention your fuel pressure, but if 15lbs or less, this is what I use.
The line inside the car from the isolator to the gage has antifreeze in it.

[cnc]

https://www.speedwaymotors.com/NOS-1...ge,392481.html

[leeklm]

Ok, I did hear about an isolater but was not familiar with it. I have an older 1990'ish Autometer mechanical gauge that works fine. I assume that gauge would work behind the isolator and half the cost of a new setup


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[ta man]

That Autometer is the one I use..for my car its nice..fits right in the AC hole on the dash..

[chuckies76ta]

I have a complete setup with isolator if your interested. In my opinion, a fuel gauge in the car is not needed. Set your fuel pressure up with a gauge on the fuel rail and forget it. You can always T in a fuel pressure gauge when there is an issue to check pressure at WOT.

Charles

[leeklm]

Originally Posted by chuckies76ta

I have a complete setup with isolator if your interested. In my opinion, a fuel gauge in the car is not needed. Set your fuel pressure up with a gauge on the fuel rail and forget it. You can always T in a fuel pressure gauge when there is an issue to check pressure at WOT.

Charles

Possibly interested... I just ordered the isolator last night and will see how it works with my old AM gauge.

I agree with the set it and forget it approach, which is what I have done with this fuel system on 2 different cars. But was at the track on Saturday playing with a new/used carb, changing jets, and on one run the car fell flat at about 60ft,;almost died like it was out of gas.

Back in the pit I looked at the liquid filled gauge underhood that was reading 1lb. I knew the gauge was wonky when hot, but now found out it was REALLY wonky when completely heat soaked in 90 degree weather. Anyway, I was trying to troubleshoot what was going on and of course had no idea what kind of pressure was there. Frustrating.

Made several more runs with no issues. Since I go to the track fairly often, figured it would be nice to see what was going on with fuel at all times. But in any case the car still did better than the driver and my night ended early!

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[chuckies76ta]

Not trying to tell you what to do, but I hear that the liquid gauges don’t do well with heat. I run dry fuel gauge one on each car with no issues.
If I were you I would just come off the fuel rail with a -2or-3 to a gauge above the hood and keep an eye on it on a wot run. I would get the stainless fuel line to the gauge.

[janderson]

Originally Posted by leeklm

Ok, I did hear about an isolater but was not familiar with it. I have an older 1990'ish Autometer mechanical gauge that works fine. I assume that gauge would work behind the isolator and half the cost of a new setup


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However you decide to go, just don’t mount anything fuel related to the firewall.

[lust4speed]

My autometer electric gauge is several years old and continues to work excellent. Have a friend that purchased the S&W electric gauge and is pretty frustrated with it since it reads a little different every time the car starts up. His mechanical gauge at the regulator next to the sender always reads the same so it's something with the S&W gauge or sender.

[Old Man Taylor]

Originally Posted by janderson

You didn’t mention your fuel pressure, but if 15lbs or less, this is what I use.
The line inside the car from the isolator to the gage has antifreeze in it.

That's what I use as well.

[Speargun]

I have this for sale. I went FI so it's been sitting on a shelf for years never used. $185obo

https://www.facebook.com/marketplace...8346602980968/

[Skip Fix]

I have a SW electric I T'd at the carb. years ago.Pressure on the gauge changed as engine compartment temp changed it could tell when it dropped low -but then I felt it lay down also. Took it off.

[Formulajones]

Dad used the Autometer electric gauge for about 20 years and it always worked perfectly. I put the small sending unit right on the fuel line at the inlet of the carb, the larger sending unit was velcro'd to the heater box inside the car. Heat never affected the readings on that one.

On one of my cars I used the mechanical isolator as picture above and that worked just fine. My only gripe was trying to hide that isolator under the hood somewhere.

My other cars are old school, with a mechanical gauge mounted on the cowl, visible through the windshield. On the Chevelle it's hidden under the ZL2 hood so it can't be seen from the outside unless you're actually sitting in the car. Other cars it's out in the open that goes along with the day 2 theme.

Lots of ways to do it.

[leeklm]

I ended up buying the AM electric gauge and ran it at the track on sunday (where I was the class winner !! )

Mounted the sending unit directly on the regulator, which is mounted on the wheel well. Seems to work well , but does vary about 1.5 -2lbs with heat. For what I am doing, plenty good to at least let me know what is going on while in the car...

On a side note, car dropped off 1/10 and was running a full point leaner on the AFR during my last 2 runs. Idle also picked up about 200 rpm. A little carb spray found an intake gasket leak- hopefully nothing more than that!

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[Probird]

I used the Autometer gauge and isolator. It’s still in there but it never really read right. It got to the point it read so high it bent the needle on the gauge. I set my fuel pressure at the carb and make sure it isn’t bleeding past the needle and seat and go. I run 28lbs at the pump and 8 up front according to my gauge. Never a problem with fuel delivery even on alcohol.