Quote:
Originally Posted by JimD
The engagement point of the clutch has absolutely nothing to do with whether the AC is on. There is a hydraulic cylinder that is directly moved by your foot that pushes fluid through a line to a slave cylinder attached to the clutch. The car's computer is not involved in the activation of the clutch so there is no way for the clutch to change when the AC is on.
I am not trying to say it doesn't feel different but I think the only thing that is changing is the available power from the engine.
Jim
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Exactly, thing that changes is the reduction in take off torque and it is pretty substantial on the 28 requiring extra throttle and higher shift points and a little more attention to execute smoothly. Despite leaving AC on all the time being "good" (don't think it has to be all the time but I'm sure periodic use is beneficial) generally I don't run it if its not 90+ and humid other than to defrost occasionally. As for MPG I find that if I'm driving locally with AC- pretty big 2-3+ mpg, highway cruise AC on vs. windows open for me equates to little if no change- I can still easily get my coveted 30.1 on the indicator. Why does it go in varying steps of .2 to .6? AC on (hot day) driving back roads spritely is the one instance I have turbo envy in which case I turn it off and sweat it out if I'm by myself.