Re: [AMC-List] AMC six ignition timing -- got it!

[Tom Jennings <tomj@xxxxxxx>]

On Mon, 11 Dec 2006, Swygert, Francis G MSgt 436 CES/CECM wrote:

> I don't think the steady state temp will drop if you use a 180
> thermostat, but it could. Try turning the fan on a little sooner. That's
> what I do -- fan comes on about the same time the thermostat starts to
> open, or just before. Non-adjustable fan switches aren't always accurate
> -- a lot depends on where the pickup is mounted too, adjustable or not.
> Mine's right behind and against the radiator on the left side near the
> outlet. In the summer I usually adjust to come on a little sooner, later
> in cold weather (like here in Dover, never needed to in MS!). 

I think you're right. I think I have it figured out -- I pulled
over after 45 miles of freeway driving, got out the infrared
thermometer -- the top tank inlet neck is 165F, and the outlet
on bottom is 125!

So the 195 thermostat just begins to crack open around 160 -
165, water flows through the radiator slowly, and is dropped
down to COLD WARMUP territory, and that's that. I'll have to
partially block off the radiator!

I think all that ignition advance helps too, less heat in the
engine, but I wouldn't think it would be that much drop, but
who knows. I'll have mileage data after the next tankful.



I had the fan thermo too hotu, before; I set it to come on
about 180, and in this weather (60F) the fan comes on only in
idling traffic.

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