A/C Idle Issues

[sprayed1998]

Car is a 2002 Z06 with a 402ci iron block. I had no AC all winter and spring when the car was put together and tuned. With the AC off it runs perfect, it will return to idle in adaptive idle or during throttle cracker (set to enguage at 37mph). Problem I am having is when the ac is on it wants to dip to around 500rpm and then bump back to idle after being reved, once I get over 37mph it wants to hang till it goes back to adaptive idle then it will settle down to idle. I REALLY want to disable thottle cracker alltogether and just let it run in adaptive idle mode at all times, but untill I get this idle dip (rare stall) figured out I am stuck. Here is a copy of my tune and a log running with the AC on and Off. Any suggestions would be appreciated. Thanks guys.

[Google]

Car is a 2002 Z06 with a 402ci iron block. I had no AC all winter and spring when the car was put together and tuned. With the AC off it runs perfect, it will return to idle in adaptive idle or during throttle cracker (set to enguage at 37mph). Problem I am having is when the ac is on it wants to dip to around 500rpm and then bump back to idle after being reved, once I get over 37mph it wants to hang till it goes back to adaptive idle then it will settle down to idle. I REALLY want to disable thottle cracker alltogether and just let it run in adaptive idle mode at all times, but untill I get this idle dip (rare stall) figured out I am stuck. Here is a copy of my tune and a log running with the AC on and Off. Any suggestions would be appreciated. Thanks guys.

Your airflow tables need adjusting.. your a/c airflow is adding 3.00+g/s and your base idle airflow is set to low.. for the cam you have and the idle speed you have...



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[sprayed1998]

Hmmm, that is the airflow commanded in russk's config. With the ac off the commanded and desired idle airflow are almost dead on?

[Google]

Hmmm, that is the airflow commanded in russk's config. With the ac off the commanded and desired idle airflow are almost dead on?

What is dynamic airflow, about 12 - 14g/s?

From what I see you raised your ETC Scalar.. What TB do you have?


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[sprayed1998]

Its is a mti z07 tb, I think it is just a tpis 90mm with z07 engraved on it. It is a c5 style tb.