FWIW - I just changed the timing om my 1275, from 8 degrees BTDC, to 16 degrees
BTDC, about a week ago. The car is now running hotter.
I also noticed that the more retarded the timing is, the power band shifts to
higher RPM, and the more advanced it is, the power band moves to lower RPM, and
becomes flatter. Any thoughts on this??
- Bryan
>Subject: Re: Timing Vs Over Heating
>To: "Larry Miller" <millerls@ado13.com>, "Spridgets@Autox. Team. Net (E-mail)"
<spridgets@autox.team.net>
>Mime-Version: 1.0
>
>Well for what its worth, I always heard it was too retarded makes it run
>cool, something like not burning all the gas and leaving liquid fuel in
>the cylinder. (That is likely as far off the wall as it is off the top of
>my head)
>
>Too advanced makes it run hot, the engine is working too hard and
>compression is not finished before the spark front hits the A-F mix. the
>engie then has to compress the exploding gases.
>
>At least that is the way I answered it when I applied for the "Who Wants
>To Be a Millionaire" show.
>
>Larry
>
>At this exact moment in time 7/25/00 12:46, millerls@ado13.com made the
>profound statement:
>
>>>From: "Toby Atwater" <Toby@intri-plex.com>
>>> I always heard kind of the opposite. Spark too advanced (early) will of
>>> course ping. Spark too retarded (late) will result in a loss of power and
>>> overheating. It kind of makes sense. There is the same amount of gasoline
>>in
>>> the charge but less power is developed, the wasted energy goes into heat
>>> instead of usable pushing power. That is how it was explained to me...
>>>
>>> Good luck
>>
>>Toby
>>I don't have an over heating problem I just wanted to hear some thoughts on
>>timing Vs over heating.
>>
>>Thanks,
>>Larry
>
>
>Larry B. Macy, Ph.D.
>macy@bblmail.psycha.upenn.edu
>System Administrator/Manager
>Neuropsychiatry Section
>Department of Psychiatry
>University of Pennsylvania
>3400 Spruce St. - 1015 Gates
>Philadelphia, PA 19104
>
> Ask a question and you're a fool for three minutes; do not ask a
>question and you're a fool for the rest of your life.
>
>
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