I'm checking in too and I can't see the pictures. Any idea why? I tried last night to read the thread from the beginning and I had the same problem.
Hi Tom,
I think you will not like the end result if you eliminate the idle speed screws. As you linkage tolerance opens up, you will have one or more carbs whose throttle blades go fully closed. Now while this will result in poor idles characteristics, it will do something far worse. The throttle blades will very quickly wear into the throttle bodies themselves.
I too like the cam as it will remove any quick action from the movement of the cable and make it 100% linear with pedal movement if you design the cam properly.
Tom
On both the IDF and IDA systems I have had one single idle screw was used. The other three were simply removed. The connecting linkage is adjusted to match the flow amd then that single screw is to set the idle speed, in conjunction with the mixture screws on each carb.
From your description that sounds like what you are planning.
Yes, that fiberglass scoop on 1021 has seen better days....
I'm planning to attach a few strips of yarn underneath and at the rear exit area, and video tape the air flow at different speeds before committing to a scoop design. So this will be something I do after the car is on the road.