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Originally Posted by Gun Doc
I attempted to sync my carbs the other day. I got them pretty close, but I think I may need to change out my linkage before I will get them spot on.
Just synchronizing the carbs and changing the plugs made it run like a different engine. It was scary! I got on it about ¾ throttle in second while going about 25, or so and the car launched to over 60 in a flash!
I ran the car through most all RPM ranges and I know it is still running rich on the idle circuit. I guess my next step is to drop the idle jet size. I am running .70 now. What is the collective opinion: .60 or .65?
Gun Doc
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They're easy enough to change so I'd go with 65 first. My 48IDAs on a 302 had 70s on them; changed to 65, then 60, and STILL is pretty fat. I'm switching to 55s and probably fiddle with the mains too. I'm also ordering 40mm venturis.
My guess is that you'll end up with the 60s. You may have to back out the mixture screws 1 full turn out. Then set idle speed. Next, do the increasing idle test. (turn idle screw up slowly up to about 2200 and see if the transition to the mains is smooth. If it gets rough and bogs down, you're still too rich.