Quote:
Originally Posted by tekuhn
It's very possible the counter-weights on the air valve influences the SPEED of the valve opening much more than they set the air flow at which it opens. I'm convinced at this point to just start with what I have and see how well it works. Thank you for the information.
BTW, the spring I was referring to is the one under the metering rod piston that determines the vacuum level required to transition from the richer to leaner primary mixture.
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Ah, yes. I played with this a little on the dyno. My goal was to make sure I was on the fat area of the rod, ie, rod down, while cruising at light highway speed. Had to just guestimate the load. I was able to get low 13-13.2 to 1 AFR at 20% load and 3000 RPM's. Car runs 3000 @ 70 mph. They are so easy to change , I will tune once in the car. I love that feature. Primary metering rod and spring change in 5 minutes on 2 carburetors. Now that is a very smart design.