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Lowering Engine temperature

I'm looking for input. I know with water cooled engines, sometimes removing the thermostat,or reducing the thermostat operating temp lowers overall engine temperature. (No heat in winter) I want to do that with my 993. Does anyone have any experience with that. I have tried to buy lower temp thermostats, but they don't make them, according to everyone. I have purchased for my Jeep lower thermostats. Heat kills. I did it with an Opel , and feel strongly that the extra 100,000 miles I got on the car directly related to the lower engine temps, and still got 30 mpg.
Old 06-29-2018, 04:51 PM
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You DO realize that it's air cooled!!?? There is no thermostat.

The best way to lower the engine temp is to remove the undertray.
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Old 06-30-2018, 04:33 PM
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There is a temp control valve for oil circulation to the front radiator as part of the oil tank.

Oil/coolant temp is not engine temp, but fluid temp. Oil is designed to run at a temp range. If you succeed in lowering temp, then oil lubrication may be effected.

Drop trays and air cooling is improved.
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Old 06-30-2018, 07:12 PM
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There is a thermostat, but it's for oil temperature, signals when to send oil to the front oil cooler.
Old 07-01-2018, 01:53 AM
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There are actually 2 t-stats
1 for the oil is located in the oil filter console beneath the oil tank, #16 and the other is for the fan in the right front wheel well that moves air through the cooler.


The t-stat operating temp is determined by a phase change of a wax like material, I'd need to look it up but it's ~180F. There are no options here.

Stock the oil coolers work fine for most street use. If the temps get uncomfortably high

say ~248F, you add another oil cooler in the left front wheel well.
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Old 07-01-2018, 05:13 AM
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you can get a lower temp fan switch to turn the cooling fans on earlier (or jumper ir to run when the car is on). You want the oil temperature above a certain temperature before sending it to the front cooler or you risk blowing out the oil cooler with too much pressure from thick oil.

thanks,

john
Old 07-13-2018, 11:49 AM
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