"loping" idle

[kja]

Google for a carbed road star that has piston and cams. It is 1 of the best sounding v twin engines I have ever heard. If you like the sound of a nasty big block...

[arizonawarrior]

The trouble with running very lean is the heat can do some damage.
But even when mine was real lean it didn't lope like that. Dunno.

Originally Posted by Mustfire

Since I have understood from fooling around with hot rods for many years that the reason a competition cam makes an engine "lope" is indirectly because of low vacuum. But, the low vacuum causes not enough fuel to reach the engine at idle. So, would adjusting the fuel map to run very lean at less than 1K RPM have the same effect? We don't spend much time idling so I wouldn't think it would damage the engine any. Thoughts?

[kja]

It's not just lean as much as improper and spuratic amounts of fuel.