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Old 08-13-2012, 09:45 PM
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Cobalts diagram shows how to set up the transition slot before you put the carb on. Yours is installed. Leave it there. Back off the high idle, hook your vacuum on your distributor to a manifold vacuum source, fix your other vacuum leaks, start her up, get it warmed up, set your idle to as slow as it will run nicely and then adjust the idle mixture screws. When you turn them in and your motor slows down you'll know you're throttle plate is in the correct position with regards to the transition slot.
Cobalts diagram shows the ideal transfer slot position. Your motor might be slightly different and will need more throttle plate opening.

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Old 08-13-2012, 09:52 PM
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Got it (I hope).
Thank you.
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Old 08-14-2012, 07:54 PM
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Originally Posted by Infinite Monkeys View Post
I was thinking I could at least base line the transfer slot for now. What I am confused on is if I take off the carb, can I adjust the throttle plates so the transfer slot is the recommended square’ish shape, or this must be done by looking from the top down. The diagram suggests the bottom up approach.
The transfer slot can be set w/the carb off the engine. The drawing shows what you'll see w/the carb upside down, looking up at the transfer slot from the intake plenum.

So don't set the transfer slot by looking down from the air horn towards the throttle plates. Instead set it by turning the carb over and look at the slot from "underneath".
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Old 08-15-2012, 06:20 AM
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That is just what I did, looking from bottom up. It is now running much better even with the intake leaks. Those will be fixed in about a week. and then I'll see what fine tuning the idle screws will need.
Thanks for your help.
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