Quote:
Originally Posted by Gaz64
Throttle plate to transfer slot relationship is correct, all mixture screws at 1.5 turns out.
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You know, I tried something a little new this year on adjusting my idle mixture. I had changed out my S/H air filter for one of the K&N Xtreme jobs and, of course, had a thread with pics on the fab job to make it sit flush and fit inside the Turkey Pan. The increased air flow necessitated a carb adjustment. Instead of using my vacuum gauge, or watching the RPMs as I monkeyed with the mixture, I fashioned a little cardboard circle to go around my screwdriver, similar to a cam degree wheel, so I could easily adjust both screws exactly alike. Here's the new part: I adjusted the mixture screws so that they were
exactly the same amount out from seated and the distance was an amount so that when I removed the rubber plug from the vacuum port (manifold vacuum) at the front base of the carb, the RPMs did not go up, nor did it go down - it stayed exactly the same (no vacuum advance on the distributor, btw). The car has never run better. I was told this little trick by an
ancient Ford technician who said he swore by it on Fords with longer overlapped cams and Holleys on top. BTW, in measuring the mixture screw distance out from seated, it is just over one full turn. Soooo, if you have absolutely nothing better to do, pull the plug off your vacuum port while idling, if the revs go up, or if they go down, try this trick and see if you like the results.