[Def]

Open up your IACV set screw. Your engine will take about 30-40% more air at idle with those cams due to the overlap. With the set screw set for stock cams your IACV duty cycle is way higher, which is fine on a steady state idle. When it needs to let in a lot of air quickly like clutching in and catching the idle it will not ramp up the duty cycle of the IACV fast enough and you'll get some sputtering and stalling.

Trust me, it takes only a few seconds to give the IACV a few extra turns open. Remember, it's counter clockwise as you're looking at the IACV, so the bottom mounted IACV on a GReddy/FReddy intake mani needs to be turned so the screw is going CCW.

Don't turn it so much you raise the idle, but I think you'll find you can easily give it a turn or two and not affect your idle at all, and then you'll enjoy no stalling.