Idle Rumble

carloMember

Hi, I have a question for the engine experts.

Is the rough idle that is common to many V8s, particularly the older ones, caused by poor mixture quality at very low RPM or is it because of the camshaft design?

I compared the specs of the cam in my Cleveland with those of a '95 Winsor 302 HO and noticed that my cam has slightly more duration but considerably more overlap being 61° compared with 39° of the 302.

Modern V8s generally idle smoother than say, those of the 70's. Is this so because fuel-injection provides a better fuel mixture or is it because of a change in camshaft design?

Cheers,
Carlo

1/30/188:52 AM

Original Post

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