Do you still need idle air control valve if you’re running itbs on an m103 engine? With modern electronics, Ecu sensors harness etc…
Itbs and idle air control valve
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You sill need some mechanism of allowing idle air into the cylinders when you are off throttle. You could try to do this with a very small opening in the throttle stop, but this would be very crude and would not self-adjust to varying conditions and temps. It would be better to keep the IACV in place and plum it in after the throttle plates. The throttles you are using may already include a small port for this, and you would have to create a manifold to evenly distribute the air from the IACV to each of these six ports.
Thank you
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