[DML] Re: Failed emmissions AGAIN - really long

["Dan" <djdanwilson@xxxxxxxxx>]

--- In dmcnews@xxxxxxxxxxxxxxx, "Tom Niemczewski" <tomciodmc@xxxx> wrote:
> 
> >> Is this a bulletproof enough source? :)
> > Yes, but looking back on what I wrote I was apparently not clear
> <SNIP>
> > Okay, so wouldn't higher combustion temps burn off these deposits?
> ****
> Ok, you would be right in this case... it seems logical, but you are 
> forgetting one thing. In case of the engine the time of the burn is
also 
> important. This means that all gasoline needs to be burned in a 
> predetermined amount of time...
> Makes sense? ;)

Yep


> > Also, my previous question still
> > remains. If you have an engine that has been run for a long time on
> > higher octane fuels than required, and it now has these deposits built
> > up that have raised it's compression as a result. Wouldn't suddenly
> > running it on lower octane cause, or run a higher risk of detonation
> ****
> YES, You are right. It might cause knock when you switch to
'regular'. It 
> the engine has been run on premium for a long time it will sound
much worst 
> at first. BUT with the raised compression and now faster burning
fuel the 
> deposits will be cleared out of the engine pretty quickly. That is
why I 
> advised to go on a hour long drive at highway speeds. Detonation and
knock 
> usually occur at high loads (heavy acceleration). Cruising at constant 
> highway speed does not put a lot of load on the engine and at the
same time 
> keeps it running at high RPMs. Great exercise for the engine, clears
any 
> deposits, moves a lot of gas through the converter clearing it as well.

How about moving down to 89 first, then 87?


> I would like to congratulate everyone who got this far reading my tech 
> stuff. You must be really TOUGH! ;)

Tom - Just so you know, I was not trying to debate you or say you were
wrong. I'm just trying to understand.

Dan W.
VIN 16192
AZ-D








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