What is the size in AN? Thought maybe I could do a fp gauge at the inlet of the pump?

 

I used a metric to an style adapter and put a 90 degree fitting on top of that and tapped the elbow for a fuel pressure gauge. Its kind of a tight fit and kinda a pain to take on and off but it works great.

There is a fitting similar to this available from vulcan but its tapped on the wrong side of the 90 so I just tapped a normal one. It barely clears the throttle lever and I actually had to trim it just a bit in a non-critical spot. But it flows well and never leaks even though I have had it apart several times. Plus I know what my fuel pressure is at the pump.

The fuel pressure line came from vulcan with that 90 degree bend already on it.

 

cool setup, i really like the tapped 90* idea ;-)

 

I admire the craftsmanship of the tapped elbow; but, could not the same thing have been accomplished with a JIC swivel TEE fitting ??

 

enlighten me...What is a JIC fitting??

 

Just In Case?>?

 

This is exactly what I am after. What is the AN size?

 

-6 is usual.

 

Thanks, should be fired up again this weekend.

 

the fuel line is -8 which is about 1/2 inch. the fuel pressure gauge line is -4 I think. -8 may be a little overkill but that's what the airdog comes with.

 

For those who may not yet be in the know :


JIC = Joint International Conference

AN = ARMY/NAVY

The fittings are exactly the same except that the standards of material and fit is somewhat stricter for the AN which may be used on aircraft.

JIC is plenty good for what we do and far better than the way most are plumbed from the factory.


The numbers, such as -4, -6, -8, and so forth denote sixteenths of an inch = NO METRIC HERE = GOOD OLD AMERICAN measurements.


Each number represents that many sixteenths of an inch; for example:

-4 = 4/16-inch = 1/4-inch

-6 = 6/16-inch = 3/8-inch


One of the main attractions of using JIC/AN is being able to remove and then replace lines without damaging the rubber line.

Another big advantage is the way many JIC fittings will swivel, thus allowing complex fittings to be attached in places that would be impossible to screw in a rigid NPT fitting.


Also, the swivel fittings permit the fitting to be "aimed" in any direction, 360* around the fitting, without that aiming having any effect on the tightness of the fitting in the threaded hole.


Plain old NPT fittings can be aimed, but it is a trade-off of either the fitting just not hardly being as tightly attached as would be best, or taking it another round and it probably not being mechanically possible to do so; it's either risk a drip or risk splitting the tapered female portion.


I hope this clears up some of the bewilderment of those that do not yet understand JIC and AN terminology.