Thermostat ?

[Jackpine]

Originally Posted by BlackSTX

I've recently swapped mine out for a 180 degree stat, so far so good. I know part of the reasoning for the manufacturers going to higher temps is emissions, I just don't like running a vehicle that hot, though I know it's engineered for it. It's possible that in the winter I may want to swap back to a 195 depending on how well it defrosts the windows in winter; but for now I'm happy.
The question I have is this something that may allow me to advance my timing a degree of two since the head temps are now a bit lower and will this help prevent pre-ignition to any usable amount? I guess, from a programming stand point, is there a benefit to having changed this?

Actually, I doubt there's any benefit at all. If, in fact, you ARE running a couple of degrees cooler, it's because you live where there are only two seasons: Winter and the 4th of July. I cannot see how that small a drop in engine temperature would allow you to advance your timing at all.

But, you now have a longer warm-up period which means you are running richer longer. This can lead to carbon fouling and possibly increased "washing" of lubrication from the cylinder walls.

Once your stat opens, your engine temperature will ultimately rise according to the load and the ambient temperature, so after everything stabilizes, you'll see very little difference from what you had with the 195 degree stat.

(And, I see Lars beat me to the punch - well, he's younger and quicker)!

- Jack