Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
Setting up the new carb--pointers?
F250 Restorer:
I haven't run it since I drilled out the mix holes. If backing out the mix screws has no affect on the surging/nozzle drip, should I drill the restrictions in the idle tubes, or just purchase diff. ones from you.
If I should drill, what would be the size of drill to use?
F250 Restorer:
I wanted to mention that since I plugged the bypass air in the throttle plate I have had to turn the idle screw in quite a bit to get it to idle. That means the primary flaps are open a bit, and, I imagine that is what is causing the nozzle drip and surging.
Where do I go from here? Thanks, Cliff.
F250 Restorer:
A Happy and healthy Easter to you and yours, Cliff, and to all others on this forum.
I didn't hear from anyone, so I went ahead and read through the modifying section of the book. Since I no longer have by pass air, I guessed that the stage 1 recipe would be too little for my carb. I hope that was correct. I drilled the idle tubes at .045". I wanted to enlarge the down restriction too, but found it to be considerably larger than .045", so I left it. I will try it tomorrow and see how it fares.
F250 Restorer:
Cliff, what size should I drill the idle tubes at? Where would you start?
F250 Restorer:
After sinking about $300 into this project, I do not want to give up on this carb. I found a diagram online that really helped me 'see' the idle system and understand how it works. I want to post it here to help anyone else who is struggling.
I spoke to Cliff and he is as perplexed as I am. I'm sure it is b/c of my lacking knowledge of carburetors. But when I install once more I will do the tip in again. If the engine sp increases, it needs more fuel. If I pull a v.line and the engine sp. increases, then the carb needs some by pass air.
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