Help on where to hook a fuel pressure gauge Big Cam with a PT pump

Honestly, be careful what you do.

Myself, I think 15 on the boost is low. I have a big cam 350 and I think mine is over 25.

185 on the fuel pressure is about where the stock engine is. A lot of guys put a different button in and a lot of guys crank the fuel pressure up but that's really not the right thing to do- in my opinion.

Cranking up the fuel pressure is hard on the camshaft. If you want more fuel you should buy oversized injectors that will flow the right amount without running high pressures that will damage your camshaft. Pittsburgh power or premco or whoever can set your pump up to flow with the over size injectors.

Timing is another consideration if you really want more power.

And if you have the low flow system, high horsepower is probably not the best idea.

 

Agreed!
The throttle lever should be spring loaded and break over at full throttle. That is easy on all the components and allows for engine twist and such under load.

 

What is Breakover ?

 

In the picture you can see the throttle shaft just below the pinch bolt. That throttle shaft and the linkage turns as one piece and will only go so far.

The piece with the Spring is where the linkage From the accelerator pedal hooks up.

When you go to full throttle the throttle shaft goes to its limit but the piece with the Spring will break over and continue to move with the accelerator pedal.

 

So I know this is a old thread but I have tried using the same gauge and a copper install kit and I cant NOT get it to stop leaking from the gauge it started the the line (somehow got cross threaded and I put a new fitting in it and now its ether leaking from the gauge or fitting again) did you have the same problem?

 

No sir. Not on the gauge end. I’ve installed 5 of them in trucks within the last 20 years and haven't had a leak problem at the gauge. I use the liquid Permatex thread sealer. Not tape. But on one I had a leak at the pressure head/shutoff valve that fought me. The Blue tread sealer tape on that was the only remedy. The cross treading may have loosened up the thread pitch a hair on the gauge or the compression ferrel just enough to cause a bad seal. May not be able to see it with your eyes. Might try putting JB weld on threads and tighten her up pretty good to save it.
I’ve done the JB on vintage boogered thread oil and air psi gauges with great leak free results.

 

Hope you are using copper line as suggested. There are at least three different compression fittings for 1/8 line. Do not mix them up. The DOT rated ones are best.

 

I did I figured it out when the fitting got cross threaded and I cut the end off I guess I took a small chuck out of it because when I put the panel back it broken now I replaced the fitting and made sure it was good and it ran today without any leaks.

 

Hey guys im new here and I have a small cam and was wondering is the pt on the small cam the same and make all the same connections as described in this post? thanks

 

Yes. All PT’s are the same in that regard. The Type G was what most of the small cams came with. The Type AFC came along in the mid to late 70’s with the big cam. Better for the turbo engines and will wake a small cam up nicely. Both used same pressure head/shutoff valve and solenoid.