RE: Re: Ping and Rattle problems

From: Bernd D. Ratsch (bernd@texas.net)
Date: Fri Oct 29 1999 - 20:32:30 EDT


The chances of it happening at TDC is very slim. And on a consistent basis
even more slim. Pinging...Knock...PreIgnition...or whatever you'd like to
call it, has been breaking engines (blowing holes in pistons) since day
one. Why do you think the manufacturers put Knock Sensors on some of their
engines (not Dodge in particular either...they really don't use them). Why
do you think that the old Vacuum Advance backed off when you stepped on the
throttle (and not just because the vacuum dropped to 0 either). Why do you
think that on the old "Hot Rods" the slogan was "Advance it until it pings
and then back it off a few degrees.

Automotive experience is a plus on understanding what Preignition is...but
claiming that it's actually good is just ignorance.

$0.02

- Bernd

-----Original Message-----
From: owner-dakota-truck@buffnet.net
To: dakota-truck@buffnet.net
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.



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