[Diy_efi] water injection

[ian]

On Fri, 2007-09-28 at 07:06 -0500, gary wrote:
> Ian, are you stating the noisy ringing of combustion due to excessive 
> vibration must result in mechanical damage to be considered
> detonation? 

No. but theres a difference between rapid combustion and detonation.
(IIRC, the latter is supersonic?)

> There are various (3 ?) levels of detonation. In a gasoline engine the
> lowest level can continue for extended periods of time without doing
> any structural mechanical damage.

Ive never heard anyone say that detonation (at some low level) doesnt
cause damage. I suppose it depends on your definition of 'extended' and
how hard you push the engine...