Sarah Gallagher wrote:
> 
> David Schwarze wrote:
> 
> >I run my bus close to 0 degrees as well.  It shouldn't hurt anything, as
> >long as the engine isn't pinging (it will be more likely to ping with
> >advanced timing)
> 
> What, why and how is this mysterious phenomenon?
> 
> Thank yoooo
> 
> Sarah
> '62 Dormobile
> ---------------------
> sarah@sprynet.co.uk
> http://ourworld.compuserve.com/homepages/slg/

Hello Sarah.

The *ping* is a knocking sound, like rocks in your engine.

Engines are designed to *BURN* gas; not *EXPLODE* it. If the air/fuel mix in 
your combustion chambers explodes it is called "detonation". Its about like 
hitting the tops of your pistons with a 10 pound hammer!

If your engine runs with the timing advanced too far it will detonate. Set 
your timing no more then 30 deg BTDC MAX; 28 would be better IMHO :>)

Running a lean air/fuel mixture will also cause pinging.

This stuff will kill an engine. If you hear a *ratteling* when you pull a 
heavy load, pull your timing back.

Have fun.

Douglas