So I was going to put this in the other thread(the one with our build and subsequent rebuild), however I wanted to start fresh b/c I have a handle on what the issue is, now I need to find a work around. The motor is new, built in house, 2.2L/10.1comp/GSC S2 grind cams and Cosy dual valve spring kit/1100cc FIC/Motul 10w40 Break in.

Basically any idle lower than 1200 and the exhaust cam can not stay phased. This is due to the combination of an agressive cam and spring set up and the OEM tolerances for acceptable oil pressure at idle(6PSI). I am happy to run the car, until there is a high pressure oil pump available, at 1350 - 1400 RPM idle.

The problem is I can not get the car to stabilize at that idle when the motor gets up to temp. It seems to have a delay in the idle control table once the car reaches a certain temp. I have changed all of the idle tables to acceptable targets, but it still wants to dip down on a hot start, and then it stalls.

This may be a Tephra question, but is there any way to force the idle to stabilize(sit at target) quicker to avoid stalling. Can we access a duty cycle type of table or a feedback loop to have the car react quicker, as it does on a cold start?

John

 

In for answer as you have a very similar motor to mine

 

I couldn't find the other thread for this. But couldn't you just pull the spring out of the relief valve and add a shim to keep the oil pressure up?