Can someone explain to me RPM at Idle and why it changes …

BossJ

Hey guys,

So I’ve always wondered about this, and I’m not sure I’m asking google and searching the right question…

My question is - Why does RPM change at idle. Let me expand on that.

So I get why AC affects RPM - You’ll have a much lower RPM with no AC than with AC.

But for instance, I live in FL - it seems that weather affects the RPM range at idle as well?

Some days at idle, with AC on - I’m between 800-837 and other days I’m 865-880 (something like that)

Why is this?


Why I ask - is because it makes quite a different in idle volume in the cab


Thanks.

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2016 Pearl White 370Z Nismo (6ma) || Z1 CAI || Greddy GT X || FI Resonated Test Pipes || Ported Manifolds || Fuel Pump: aem50-1200 || 1050cc Fuel Injectors || E85 || RJM Performance Clutch || ECUTECH - SpecialtyZ (Seb)