Transfer/Transition slot adjustment
We had it set to 20 btdc. Stock dizzy with the big spring removed
Unless its a really radical cam with low compression, that's not a great starting point.
It will start easier with less initial.
It will run stronger with both springs.
Discussion here
Large RPM and Vacuum drop when shifting from park to gear
Is the idea to set it off car, then install, and set idle using mixture and timing?
Yes. Sort of.
While the carb is off, measure and write down how far the slot gets exposed for every 1/4 turn of the idle speed/throttle stop screw from just touching.
That way you can start and run fast idle with the throttle more open. Once its warmed up you'll be able to reduce the throttles to the .020 to .35" range.
Even if it has a choke and fast idle, its good to know how much the throttle screws can be turned and still be within the t-slot working range.
It's adjusted to a square. 1850, 600 single metering block. Engine starts but won't idle. Idle mixture screws are 1.5 turns out.
Good starting point for the mix scrrews
The important thing is that the mixture screws provide some level of control when the engine is warmed up. So if they end up 1/4 turn out or 2 turns out isn't that important. it does provide some indication of how much fuel is coming the transfer slots.
Make sure the fuel level is ballpark before getting too far along.
Holley idle mixture screws
