Rochester Quadrajet Carburetor Air Bleed Comparison and Testing  

Dallas. I remember drilling out and tapping the bleed holes on my carb in high school. then i could use holley style jets to screw in there. worked great. but i cannot remember the thread size to save my life. Also when i was a kid. i remember my uncle. that had a machine shop off of the Enis TX dragstrip had what looked like a small protractor and needle, that would measure the blade angle. then he would recreate that blade angle on the bench, to see how high out of the bore the needles were. then sometimes he would cut the fat part of the needle down more tward the narrow part of the needle, to tune in the part throttle mix. I have never seen one since. Great little tutorial. Thanks.

Great vid. I like 400's of all makes and models.

my 87 El Camino runs so good it doesn't need a engine check light I took the ball I took the light bulb out. NO PROBLEMS

Back in the 80's I rejetted in less than 30 min. Made my 800 cfm Q-jet externally adjustable.

I just rebuilt my first quadrajet carb for replacing efi on my 89 dodge pickup I got the top all back on looked over on the bench to see that plastic piece that goes by the float 😆 but I got it after a wile. your videos were helpful thanks!

They were awesome carbs in there day but very quirky .known to wear out throtle shaft bushings. But wen they are tuned good will give a holley carbed car close race. Good video thanks

Thanks for the video Dallas! Brings back memories in my younger years rebuilding the quadrajet carburetors. Question; can you still get the rebuild kits at the auto parts store?

If you removed the EGR, you need to recurve the distributor. The distributor for EGR has much more part-throttle spark advance.

What kind of trans and torque converter do you have? Thx

for WOT why didn't you change the secondary rods? you didn't even need to open the quad for that...

Never ending. I didn’t see the part about the Circuit. ???

Trying to improve a quadrajet is putting lipstick on a pig. You can't improve a fundamentally bad carburetor.

You just made that carb even leaner especially because of the main air bleed being .030 bigger more air the leaner it will be plus the smaller jet and fatter metering rod