Cold weather driving with or without thermostat?

[Synchro909]

Originally Posted by ryanheacox

Synchro, Jim says he uses a 5/8" heater hose as a bypass so if you drill 3 more 1/8" holes you would have the equivalent of one 5/8" hole.

How well this works in practice is another matter but it would be interesting to see.

Ryan, I now have 3X 1/8 holes. I am wondering about significantly more, maybe 6, 8 or maybe 10. I doubt I would ever end up with as much bypass this way as Jim's 5/8 hose. For that, I'd need 25 X 1/8" holes. There would not be much T'stat left if I did that!

[AL in NY]

I've posted this before, but using the Vintage Precision thermostat housing with a 160 degree thermostat and an added bypass tube, you eliminate the hot spots in the engine that are created when the thermostat is closed during warmup.

[AL in NY]

Didn't add the photo attachment.

[ryanheacox]

Originally Posted by AL in NY

Didn't add the photo attachment.

I really like the look of that

[AL in NY]

My thinking is only about 5% of the hot water exiting the top of the engine goes through that 3/8" bypass tube when the thermostat is open. The 1 1/2" top radiator hose drops the pressure at the thermostat to nearly zero.

[ryanheacox]

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Originally Posted by Synchro909

Ryan, I now have 3X 1/8 holes. I am wondering about significantly more, maybe 6, 8 or maybe 10. I doubt I would ever end up with as much bypass this way as Jim's 5/8 hose. For that, I'd need 25 X 1/8" holes. There would not be much T'stat left if I did that!

Riiiight 5x diameter does not equal 5x surface area