Idle speed.

[1937pickup]

Just read Walt's post about an engine with multiple carbs and a L-100 (?) cam. He said he has it idling at 800 rpms. This seems high to me. Is it due to the warm up of the engine? What do others set idle speed at for stock engines? I thought it was around 550-600 rpms.

 

[flatjack9]

It's because of the cam. The cam has more overlap (intake opens sooner, exhaust closes later) than the stock cam which requires a higher idle speed to get smooth operation.

 

[ford3]

450 rpm for a stock engine

 

[1937pickup]

Thanks guys for the information.

 

[Al K.]

That caught my eye also. I'm glad you had the guts to ask the question. Al K.

 

[quickchange34]

It all depends on what cam profile.

 

[danliveshere]

My old 59a used to idle so slowly you could read the writing on the fan belt!!!