Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

How to Measure Inlet Pressure Capability?

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ourkid2000:

--- Quote from: Shiny on February 21, 2023, 11:55:20 AM ---Yes, once I found the flare-to-barb adapters, the rest is easy.

As to $3 on Amazon, that's just wrong...

I paid $3 at Home Depot for a brass 1/8" male pipe plug today.  The world is messed up.

--- End quote ---

Sorry, I meant 30 dollars, not 3 lol

ourkid2000:
Hey Shiny,

I made this tool, for checking running fuel pressure, last week and thought of you. This was pretty easy and cheap to make and I think it's exactly what you're looking for. Using some of the fittings you showed me, I came up with this so you should be able to use the same ones you already have. I got the gauge off Amazon, it was also very cheap.

Cheers!

Shiny:
Nicely done!  Thank you for sharing the pics.

I'm curious, does it bounce around at idle?  Does it smooth out at higher rpm to an average?

I had a hard time interpreting the "max" last time I measured.  I saw the gauge bouncing at idle and the "peaks" were high... too high, which is why I wanted to know how much the carb could tolerate.

ourkid2000:
Yeah, it's fairly smooth with that liquid filled gauge. It's a smooth transition between 7-9 psi depending on throttle position with almost no bounce.

Shiny:
Thanks

Maybe my gauge didn't damp well... I'll check.

And I like your brass tee fitting.  That looks like a good plan.

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