I've seen quite a few. In most cases it was with boost but I've seen N2O
motors make a mess too. I've even seen an R/T blow a gasket while pinging
it's way down the track (sorry to use you as an example Pete)
Joe W.
87 Shelby Charger 13.9
98 Dakota 13.1
----- Original Message -----
From: Bernd D. Ratsch <bernd@texas.net>
To: <dakota-truck@buffnet.net>
Sent: Friday, October 29, 1999 10:54 PM
Subject: RE: DML: Re: Ping and Rattle problems
>
> I'm with ya Joe. I've seen what can happen to an engine (up close) when
the
> driver doesn't know that "pinging" (or knock) is happening. It blew a
hole
> right through the top of the piston and ALL of the load bearing surfaces
> were out of spec. The cause? Preignition (aka: Detonation, Pinging,
> Knocking).
>
> Hey...all the rest of you with Blowers and Nitrous...that pinging noise is
> ok. Don't worry...nothing BAD will happen. ;)
>
> - Bernd
>
>
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> To: dakota-truck@buffnet.net
> Subject: Re: DML: Re: Ping and Rattle problems
>
>
> I think we should mention that combustion starts several degrees btdc and
we
> are referring to the time the flame front reaches the piston
> and I'm still gonna say that pinging isn't goods at any engine speed.
> reguardless of how little damage it causes at higher speeds. I ask a lot
> from my motor ( 50k miles a year then towing 5000 lbs and then racing with
> nitrous)and every little bit of damage will cost me in the long run
> Joe W.
> 87 Shelby Charger 13.9
> 98 Dakota 13.1
> ----- Original Message -----
> From: Dave Scelfo <macncheesemonster@hotmail.com>
> To: <dakota-truck@buffnet.net>
> Sent: Friday, October 29, 1999 9:37 PM
> Subject: Re: DML: Re: Ping and Rattle problems
>
>
> >
> > > > I dont know where you read that pinging only occurs on the
> > >compression
> > > > stroke, but you're wrong. In fact, auto ignition can occur anywhere
> in
> > >the
> > > > piston's travels. It's actually very much welcome if it occurs
around
> > >TDC
> > > > because you get that extra energy in a constant volume situation.
So
> to
> > >say
> > > > pinging is not good period, you're absolutely wrong.
> > >
> > >that's what controling the timing is for, I don't want "autoignition"
at
> > >anytime. It should be controled..
> > >With the exeption of a deisel when would detonation be a good thing?
> >
> > Its good at TDC. Its hard to accomplish, especially consistently. But
it
> > is a good thing. FWIW, diesels knock also. Its alot harder to diagnose
> but
> > it is possible.
> >
> >
> >
> > >
> > > > I'm not sure what you're saying. Engine load is completely
> > >independent
> > > > of speed. The engine is not under higher loads at higher speeds.
I'm
> > >not
> > > > sure why you'd think this but its really not relevant to the
> > >conversation
> > > > anyway, so I'll save it for another time.
> > >
> > >I believe you brought up speed and high load, my point was that high
load
> > >can occur at any speed
> > >
> >
> > High load can occur at any speed. I agree. Knock is worst at low speed
> and
> > high load. Thats my point and I'm stickin with it.
> >
> >
> >
> >
> >
> > ______________________________________________________
> > Get Your Private, Free Email at http://www.hotmail.com
>
>
>
>
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