[Diy_efi] water injection

[gary]

Ian, are you stating the noisy ringing of combustion due to excessive 
vibration must result in mechanical damage to be considered detonation? 

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.

Gary

----- Original Message ----- 
From: "ian" <spyro at f2s.com>
To: <diy_efi at diy-efi.org>
Sent: Friday, September 28, 2007 4:18 AM
Subject: Re: [Diy_efi] water injection

>> It is merely a question of whether or not the rate of pressure rise 
>> is high enough to cause, in someone's judgment, objectionable 
>> noise or excessive vibration in the engine's structure." 
> 
> That's a non-statement if ever I saw one...
> I think people were talking about knock meaning 'detonation' where 
> the fuel explodes, rather than burns.
> 
> threes a very big difference between explosive and rapid combustion,
> even if the latter happens to be quite noisy. One will make a lot of
> noise and the other can separate the head from the block. In pieces.