is it true?

**purplebat66** · 05-28-2007, 02:30 PM

is it true that a car losses performance when you put the ac on and that you should not put the ac if you are going faster than 80 miles per hour . Thank you.

**jrc1122** · 05-28-2007, 02:35 PM

I know Myth busters did a thing, that proved it Does NOT effect gas milelage, as far as performance, I dont know.

It is actually worse to drive with the windows down, for gas mileage due to air resistance, I would assume same would ring true for performance,

But with windows up and AC off, / Vs. windows up ac ON. I DON'T KNOW, but I too would like to know, and like to see proof.

**2001NBMZ28** · 05-28-2007, 02:51 PM

Pretty sure the PCM turns off the AC clutch at WOT. If you're just talking about cruising at 80 yeah, it takes away some HP.

**TACE02** · 05-28-2007, 03:09 PM

Would have to agree, PCM turns off A/C at WOT. took me a few times to realize this as I occassionally forgot to turn off A/C while running and it got a little warm in my car while running then when I got off of it the A/C kicked back on...