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A lower temp thermostat is just a bandaid for overheating.

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every motor is different and sometime's going hotter in the thermostat is the answer, ya just gotta try em all. There a cheap part and easy to change. It's hard to explain but sometime's having a thermostat that open's more often (195) will keep a motor at a more consistant tempreture and stop it from over heating.....Im not sure what the boiling point is in (F) but down here they say it's 120 (C) under presure.

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The factories have dumped billions of dollars into engine research. Modern cars run around 200 degrees. They are more efficient and pollute less at those temps.
They put much more time and money into it that I ever will by second guessing them while standing in my driveway.

I'll defer to the engineers.

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YES...new cars run hotter. My silverado runs at a constant 210...it's designed that way. 60's cars were designed to run at lower temps. There were no smog pumps, or other rubbish back then. The engineers designed them, that way...back then..like comparing apples to oranges

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The factories have dumped billions of dollars into engine research. Modern cars run around 200 degrees. They are more efficient and pollute less at those temps.
They put much more time and money into it that I ever will by second guessing them while standing in my driveway.

I'll defer to the engineers.

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wrong...195 is at the high limit


YES...new cars run hotter. My silverado runs at a constant 210...it's designed that way. 60's cars were designed to run at lower temps. There were no smog pumps, or other rubbish back then. The engineers designed them, that way...back then..like comparing apples to oranges

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195 is about 1/2-3/4 reading on our old gauges not any where near pegged out or over heating. If your gauge is pegged at 195 you have a bad gauge. The older engines are way more efficent at 190 then you think.Factory theromstats were that high to begin with.

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I have a 195 and the gage in my Challenger shows straight up at this temp.

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terzmo, before you post anymore inaccurate info on this subject I respectfully suggest you do some reasearch. Engines have been running 195 stats from the factory for a long time and 195 is not the high end of the heat range or the gauge for older engines. 215-220 is too hot not 195. BTW nice edit on the earlier post.

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Most new modern engines run in the 200 to 220 range which is best for emissions but not performance. The manufactors did not build the cars for drag racing (most of them) they were built for low emissions and fuel milage and to be very efficent. But ask any drag racer what temp he likes his eng at when he leaves the starting line ?? I can tell you my 63 and all my cars that I have owned run the fastest running about 160 when I launch and then it is about 170 to 180 crossing the stripe but it can be hotter on real hot days. If the eng is to hot it wont fill the cylinders as much which can hurt performance. I prefer my eng to run about 180 on the street but I did not build it for fuel milage or emissions. Ron

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Ron, if you really think about it, its not so much with having a cooler head/block/cylinder temp as it is having a cooler intake/fuel charge going in , A 180* engine will have a "warmer" intake then an engine thats at 160*, so you then have a warmer intake charge, thus in a sence gives a slower ET & MPH, thats why guys would Ice down there intakes, then push them to the box, you then in a sence will show a cooler engine because the stat is in the intake, but the rest of the engine will still be on the warm side, the cooler intake charge is like racing in cooler air, it gives you the same affect, i personally never noticed a any real change from run too run "in COOL" air whether i was at 160-165* or 180*, now in the hot air, it might benifit cooling down the engine a bit, this will also cool down the intake charge, but iceing down is the best way in hotter air, of coarse thats getting harder to do now that they've been cracking down on that.

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I run as hot a thermostat as I can get. 195 is usually it, but sometimes I can find a 205 degree one.

Define efficient? Getting the most out of the least is one way. Be it mileage or power. Modern engines make as much NET HP as the muscle car era engines made GROSS, yet double the mileage. You still want to argue that cold engines are better for efficiency or power?

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It took about two seconds for me to open my 1969 Plymouth Service Manual to page 7-1.

Which reads that a 190 degree thermostat is used on all models except those equipped with the 170 ci slant six which uses a 200 degree thermostat.

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Dearest Stump...before You whack someone,invest some time in reading comprehension as I stated earlier that 195 was approaching the high end of the normal operating range. Run yours hot...I'll run at 180

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