Schrader valve thread
Thread Starter
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
Schrader valve thread
What is the thread for the Fuel Pressure test valve?
I already know that is is close to -4 AN, but that won't work for what I need to do.
I have an adjustable FPR that has a 1/8NPT port for a gauge, and I am trying to find a fitting that will allow me to connect a Fuel pressure tester here.
I found these but I am not sure if the thread is correct.
http://www.grainger.com/product/20W3...oneId=IDPBTZ12
I already know that is is close to -4 AN, but that won't work for what I need to do.
I have an adjustable FPR that has a 1/8NPT port for a gauge, and I am trying to find a fitting that will allow me to connect a Fuel pressure tester here.
I found these but I am not sure if the thread is correct.
http://www.grainger.com/product/20W3...oneId=IDPBTZ12
Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
If you are looking for a fitting to screw into the fuel rail, I just made one today to make it a 90 degree to make it easier to hook up gauge. I took pictures of the parts, but got so anxious to get it on I forgot to take a picture before I installed it. The size that screws into the rail is 5/16" X 18 course bolt. I drilled a hole in the center of a SS bolt, welded to a steel coupling. I used a jamb nut on the bolt so I could adjust the direction of the Schrader valve that is screwed into the shortened coupler. I was hoping it would be short enough to put on rail, but had to loosen it to give me room to turn it on. After turning it on about the same amount as the threads as what the Schrader valve was than I tightened the jamb nut. I did use a little pipe thread tape and the washer that has the rubber on it to seal tight. Since I had an extra valve and washer I installed that on the open end of coupler. The other end was welded shut. I really wanted a brass fitting but there is none made like the 1/8" pipe one.
Team Owner
Joined: Jul 2004
Posts: 28,464
Likes: 3,288
From: Hartford WI
It will work. I know this because I bought them form my Holley Stealth Ram. UNFORTUNATELY, you must buy a pack of 5. I used 2 which is why 3 of them are sitting somewhere in my drawers gathering dust.
I suppose I could dig them out and sell you one or two. Let me know
I suppose I could dig them out and sell you one or two. Let me know
Thread Starter
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
The fittings got here, and I found the that size adapter the was included with my pressure tester. I ended up ordering the same fitting set from ebay instead, and they have the same seat angle as the size adapter.
