RPMs? - Team Camaro Tech
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post #1 of 5 (permalink) Old Apr 9th, 01, 03:50 AM Thread Starter
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Location: Turlock, CA, USA
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I did a ton of searching in the threads and couldn't find my question/anwser so I'm just gonna ask it. What determines what the RPM should be set to at idle?
I know I should set my idle before the timing... but I don't know what it needs to be. Any help would be great. I'm driving a 68 SS, 350, Carter Carb 600cfm, Accel Super Coil. I'm curious to know what to set my RPMs to, but also to understand why -Thanks!
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post #2 of 5 (permalink) Old Apr 9th, 01, 04:32 AM
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NORMALLY on a stock motored car, it should be around 800-850 RPM. On a motor that has a more radical CAM set up that can be as high as 950-1000 RPM (if you're lucky!!).
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post #3 of 5 (permalink) Old Apr 9th, 01, 05:06 AM
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When you have an engine with the RPM's set too low at idle, you may experience low oil pressure and low voltage at the charging system. Also depending of what type of transmission you use you can change it a little to better suit your taste. Some people with beef up trannys don't like the transition from neutral to drive or reverse so they lower the idle speed a little. As "sr71bb" says, the cam has a lot to do with it also, the same as if the car is equipped with an air conditioning system.
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post #4 of 5 (permalink) Old Apr 9th, 01, 11:57 AM Thread Starter
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Thanks for the info... also would the fact that a tranny is auto or manual make a difference? I would presume so. I don't have any air conditioning. I do however have a 3 speed manual tranny, don't know what yet...
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post #5 of 5 (permalink) Old Apr 9th, 01, 12:38 PM
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I think a more general answer is as low as possible without stalling/charging problems. I would think most stock small blocks can go with 600 rpm or so(in gear if auto)-I think that is what manuals say.

1969 Nova SS 350
13.68 at 105
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