The 1947 - Present Chevrolet & GMC Truck Message Board Network - What should the tachometer read in idle?

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Lionc68c10

01-31-2009 03:11 PM

What should the tachometer read in idle?

Was wondering if any one knows what the tachometer should read when the truck is in idle. The engine is a V8 350 4 barrel 1968 c10....Any suggestions? :chevy:

mr48chev

01-31-2009 03:17 PM

Re: What should the tachometer read in idle?

I don't have the manual in the house but I think around 650 for a stone stock engine in neutral is pretty close.

If the truck is an automatic you don't want it to idle so fast that it trys to move the truck appreciably when you slip it into gear at an idle.

Andy4639

01-31-2009 04:27 PM

Re: What should the tachometer read in idle?

My 71 with it in park [auto] is around 700. When pulled into gear it's 500 or so.

texanidiot25

01-31-2009 08:59 PM

Re: What should the tachometer read in idle?

My truck idles around 500-600 while we tuned it. Don't have a tach in the truck though.

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