67Fast_V
Well-Known Member
- Thread starter
- #1
Had to replace the OEM t-stat after 900 miles on a 2020 GT PP1. The bypass circuit was locked in the fully open position and overheated the engine while into it hard. Also the main circuit on the t-stat may not have been functioning properly either. It's stuck in the partially open position. See attached.
I put the Reische 170 on my stove w/ a Tc and tracked the opening rate. You might find the data useful/interesting. See below. I really need to compare this to the OEM (new).
Reische 170 P/N FORD 50
170F cracked open
180F 22% open
190F 58% open
200F 95% open
Full open is around 202F ish. My reference full open is 0.41", although this is a bit difficult to measure.
Test it 6 times, this is the pseudo average. Didn't vary much, maybe 1-2 degs. The distance open was tricky to measure as you can imagine so the % could be off a little. Maybe 5% or so.
Installed in the car, CHT runs 181 - 190F. Stopped for 5 mins ~189-190F. Moving 181-187F. South FL, 90-92F ambient. Behaves much better than the factory OEM, although the OEM was clearly defective.
With mild loads, the indicated ECT for me is 9F lower than CHT. This tells me that the thermostat is open maybe 10% (Between 170-180F). That's my guess. Guess Math = 190(CHT) - 9 (dtECT) - ~7 (heat-up from t-stat to CHT loc) = 174F =~10%. If you ignore the dECT, then the t-stat is open about 33% (183F). So there you are, 10-35% open under "normal" driving.
Planning to track the car in the future. What this tells me is that it my track temp will start at 202-205F and go up from there depending on the cooling effectiveness of the radiator/system. Hoping for less than 225F. Might be a pipe dream. Will find out in Oct. Cheers.
I put the Reische 170 on my stove w/ a Tc and tracked the opening rate. You might find the data useful/interesting. See below. I really need to compare this to the OEM (new).
Reische 170 P/N FORD 50
170F cracked open
180F 22% open
190F 58% open
200F 95% open
Full open is around 202F ish. My reference full open is 0.41", although this is a bit difficult to measure.
Test it 6 times, this is the pseudo average. Didn't vary much, maybe 1-2 degs. The distance open was tricky to measure as you can imagine so the % could be off a little. Maybe 5% or so.
Installed in the car, CHT runs 181 - 190F. Stopped for 5 mins ~189-190F. Moving 181-187F. South FL, 90-92F ambient. Behaves much better than the factory OEM, although the OEM was clearly defective.
With mild loads, the indicated ECT for me is 9F lower than CHT. This tells me that the thermostat is open maybe 10% (Between 170-180F). That's my guess. Guess Math = 190(CHT) - 9 (dtECT) - ~7 (heat-up from t-stat to CHT loc) = 174F =~10%. If you ignore the dECT, then the t-stat is open about 33% (183F). So there you are, 10-35% open under "normal" driving.
Planning to track the car in the future. What this tells me is that it my track temp will start at 202-205F and go up from there depending on the cooling effectiveness of the radiator/system. Hoping for less than 225F. Might be a pipe dream. Will find out in Oct. Cheers.
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