[DML] Re: More on idle speeds

["content22207" <brobertson@xxxxxxxxxxxx>]

It's not the firing order -- it's the displacement. Little engines,
circa 1981 at least, simply lack enough inertia to idle at 500-600
RPM. Like you, I love big block lope, but you'll never get it from a
PRV. If you think the thing rocks & rolls at 800 RPM (*THAT'S* the
effect of odd firing), try it at 500-600.

And don't forget that Volvo specified 950 RPM idle, surely for this
very reason.

Soak your throttle and throttle spool return springs with penetrating
oil. Windings need to slide past each other for proper tension.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "stainlessilusion" <5n-@xxxx> wrote:
> 
> 
> Indeed, I'm quite used to working on BBF 390s/427s that idle so slow;
> but I just like the idea of adjustability and forgot the engine is
> odd-fire and is limited to how low it can go. It just seemed that it
> was idling a bit higher then it should. Yes, the screws are seated,
> and the butterflies, although still sticking when you release the
> accel; are closing all the way. If I hit the accelerator and let off
> quickly a few times, then it closes all the way as it should. I've
> been playing with distributor/timing adj, and CO-engine still has some
> rock and roll at 800. Idles fine when the butterflies stick open at
> 1500 though...Dani B. #5003
> 









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