Originally Posted by markk

Don't bother modding the standard valve.

Find an alternative that bypasses lots more air if its for your competition car.

I used a Bosch Roller cell about 10 years or so ago as well as a standard valve, gave effectively 2 stages of ALS.

What ECU you running?

I don't have any idle bypass of ALS valves now at all, all done by active throttle control.