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L78CHEVELLE · 07-26-2013, 09:46 PM

Many years ago I purchased some thermostats for the 48 back flathead engines that have a dial to set the opening temperature at 140 up to 190. With my '40 I set the dial on the thermostats at 140 year around. In KY my car runs 160 in the winter time and 160 to 180 in the summer. No holes drilled or changes to the original design. They fit in the heads and I think the brand name is Doyle. Maybe wrong about the name since I put them in about 2 years ago. The 140 gives a very good range and will not let the engine drop below 140 at any time after the engine warms up above the 140 mark. I have Carpenter new design water pumps on this particular '40 I'm referring to.

07-26-2013, 09:46 PM	#11
L78CHEVELLE Senior Member Join Date: Jul 2010 Location: London Kentucky Posts: 356	Re: Shewman's High Flow Thermostats Many years ago I purchased some thermostats for the 48 back flathead engines that have a dial to set the opening temperature at 140 up to 190. With my '40 I set the dial on the thermostats at 140 year around. In KY my car runs 160 in the winter time and 160 to 180 in the summer. No holes drilled or changes to the original design. They fit in the heads and I think the brand name is Doyle. Maybe wrong about the name since I put them in about 2 years ago. The 140 gives a very good range and will not let the engine drop below 140 at any time after the engine warms up above the 140 mark. I have Carpenter new design water pumps on this particular '40 I'm referring to.