Skizzors

Does anyone have their idle rpm set at anything other than 800? What are the long term effects of doing this if any?

paydirt

The tune I got from brenspeed with my paxton had it set for 650, I just kept it there, no problems thus far.

r3velation

i thought our idles were set at 750.

onederful100

i think so too. that's where mine is set at.

mygt500

I have mine set at 900 but the 60# injectors seem to like it that way...... JMO but you can set it anyway you want....long term effects ....none- and maybe a little more or less gas consumption depending on what RPM it is set at.

07musclemustang

i set mine to 850 dues to an underdrive pully, just because i want to ensure adequate charging

ski

If the idle speed is set too high, and the car is subject to a lot of idling time(Read: city driving), then over time it may build up carbon in the combustion chamber and varnish coat the cylinders due to idling speed's inherent inefficient combustion, cause fuel to leak past the rings into the oil sump reducing the oil's lubrication efficiency, emit more pollutants per second, as well as waste fuel as mentioned by the others.

D_Gusler

950 here. just like my GT500, its where the car seems to feel right

07musclemustang

thanks for the warning but i think i blow out my carbon enough to outweigh the effects of ideling every now and then at 850. My cylinders get good and hot usually everytime i driver her

ski

Correct me if I'm wrong, but I believe we're talking apples and oranges.
You're referring to intermittently idling at a higher than normal rpm, while I was referring to a constant high idling rpm setting. Also, getting the engine to its normal operating temperature under a load(Read: driving the car), and then running it for at least 20 minutes after it has fully warmed up is the best thing for it. However, a constant(not intermittent) high idle speed setting may cause the effects stated in my previous post or not the engine is fully warmed up. But if you go WOT a few times every time the car is driven, then that may prevent some of the carbon build up.