fuel press. gauge question

[newwguyy]

Just got a fuel pressure gauge from SUMMIT, but it only has a male threaded plug coming off the gauge...Does any one know the size of the threaded nipple coming off the fuel inj. rail where the gauge will screw into? I am hoping I can get the fitting locally and not deal with summit, as they told me this one would "fit right on there".

 

[85 ttypewh1]

I have a 85 gn and used -4an fitting on the schrader valve on the rail and some high psi fuel hose from a hose shop and mounted the gauge on the fender. I have read that if you mount the gauge directly to the rail that it wont last as long due to vibrations, but some people have not had a problem.

 

[newwguyy]

I am new to fittings, where should I start with looking for the fitting, and do I just tell them I need a "-4an fitting" ?? thanks for the info

 

[85 ttypewh1]

Just go to a local speed shop or a place that specializes in hoses and fittings and take the car with you so they can see what you have. The fitting on the rail is either a 45 or 37 degree flare but the hose shop i went to said when the size is that small either flare will seal it. I have had mine on for over a year with no problem. I heard that kirban's sells the fitting but by the time you pay for it and shipping it could get expensive.

 

[turbojimmy]

What brand gauge is it? Every Autometer I've ever gotten has the -4 AN adapter included with the gauge. It goes on the pipe-thread sticking out of the back of the gauge. The fitting should be easy to find at a speed shop, or you can look it up on Autometer's site and plug the p/n into Summit's site. You'll need a length of -4 AN braided steel hose with.

You are mounting that outside the car, right? If not you'll need an isolator, too.

Jim

 

[newwguyy]

I was just going to screw it onto the rail to see what im getting at idle...

 

[BRAD_PADGETT]

thats what I do-brad