On Thu, 08 Oct 1998 00:51:33 -0400, Trevor Boicey wrote:
>> This produces extra heat
>> which raises the temperature of the combustion chamber.
>
> Sorry, check your facts. The late timing actually
>runs considerably cooler, as a goal of helping the
>NOx emissions. It runs cooler because there is less
>compression than if the combustion is already starting
>to occur as the piston hits TDC.
>
I'll take your word for it, but on my Model T, I once
forgot and left the timing full retard after starting,
and the exhaust manifold went cherry red. Advance the
timing and all was well after that. This is at idle (well
at least low speed).
scott s.
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