time for 180*
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From: Westerville, Ohio 2000 Black SSEi
Originally Posted by Bob Dillon
Originally Posted by Rogue
This isnt to say that the system will always be at that temp. During Hi speed WOT runs such as the 1/4 mile my system with a 160 will heat up to 180 during the run but then cool down as soon as I get out of the throttle. But during cruise or in town driving my temps are always at 160ish.
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From: Westerville, Ohio 2000 Black SSEi
Originally Posted by Bob Dillon
Would it be fair to say them, as your coolant temp is always below boiling, that the system never pressurizes, i.e., exceeds the boiling point of coolant (i.e., around 212?)
Originally Posted by Bob Dillon
It is important to point out, as well, that the thermostat itself is a partial restriction to coolant flow. The traditional Pontiac V-8, for example, will promptly overheat without a thermostat in place, because transit time of the coolant through the radiator is reduced greatly. We remove the thermostat for the drag strip, but also have a restrictor plate in place of the thermostat to slow transit time.
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From: Gilroy, California
Good information, I have run without a T-stat before and not noticed an overheat problem but I will keep the restricter plate in mind.
Or, of course, you can buy one from Summit for $20.
It may not be a 3800 problem. The traditional Pontiac V-8 is known to be cranky about cooling. The modern version of the Ford flathead.
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Originally Posted by Bob Dillon
Good information, I have run without a T-stat before and not noticed an overheat problem but I will keep the restricter plate in mind.
Or, of course, you can buy one from Summit for $20.
It may not be a 3800 problem. The traditional Pontiac V-8 is known to be cranky about cooling. The modern version of the Ford flathead.
I do wonder if the Buick V6'* had more cooling capability then they really needed... when I bought my 91 Bonneville the Thermostat was stuck open... I could not get the car to heat up past 140F...
I almost want to think that the Caddy 4.1 & 4.5 used the same radiator with the exception of the Oil cooler... I may have to check that out as well...
And a long time ago My father had an 85 Trans Am, I swear it was way too easy to overheat that car..
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From: Indy
given that the only difference in the stats is the temp rating, then the only difference would be the temp at which it opens. You will get quicker circulation with a 180 stat. Now if the diameter of the stat opening were to be changed it would alter the rate of circulation as if it were a metering device. In slowing down the flow, the coolant would remain in the radiator longer, as well as in the block longer. As long as the rediator can disperse heat quicker than the engine, the system would run cooler. That is the same reason race cars use restrictors instead of stats. It can meter the flow rate while eliminating the possible mechanical failure possibility.Nothing like puking a megabuck engine over a $5 part.
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