Author Topic: Engine Idle Speed (Read 2992 times)

flat4 · « **on:** May 15, 2006, 08:45:27 AM »

How drastically should idle speed change with/without the fan belt? I run a CB serpentine belt, broke it at the track this weekend, and my idle speed jumped up to about 3000 rpm. Is this normal? If so, seems like it would be a huge HP killer. Thoughts? Advice?

James Buchan · « **Reply #1 on:** May 15, 2006, 08:49:52 AM »

I wouldn't think you would pick up much rpm (maybe a few hundred at most) with a broken fanbelt, did something take a kit by the broken belt?

red snapper · « **Reply #2 on:** May 15, 2006, 09:37:19 AM »

Im no mechanic but anytime I have pulled my fan belt off before racing I havnt noticed a difference at all. You should leave it off anyways for racing. Good luck, Brian

flat4 · « **Reply #3 on:** May 15, 2006, 10:07:04 AM »

Take a kit? Huh? Well, besides the shards of rubber and a clogged jet from the rubber (I wasn't running cleaners) I don't think so. The belt was hanging on the alt pulley. I don't think it went anywhere. As soon as the new belt was installed, the idle returned to normal (my normal) again. Very odd indeed. I was too afraid to run at the track without a belt.

James Buchan · « **Reply #4 on:** May 15, 2006, 01:04:20 PM »

I meant to say take a hit

flat4 · « **Reply #5 on:** May 15, 2006, 02:49:14 PM »

My car is not on drugs, creep.

Trevor P · « **Reply #6 on:** May 16, 2006, 05:17:45 PM »

Quote

My car is not on drugs, creep.

No,... but maybe you are Fred; if you're saying your idle is gaining that much!

dannyboy · « **Reply #7 on:** May 16, 2006, 07:45:19 PM »

Quote

I was too afraid to run at the track without a belt

why??
i would rather run without the belt, rather than explode a fan...

flat4 · « **Reply #8 on:** May 17, 2006, 02:33:07 AM »

I guess I have faith in welded fans. Things at the track here are different, as on Secret Street nights, it's all hot lapping. Perhaps I'll make a few runs sans belt and see what happens. I know it sounds like a crazy issue,but I wouldn't have believed it if I didn't see it for myself. I'll be checking it tomorrow or Thursday in preparation for Friday.