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Old 01-07-2013, 06:50 PM   #1 (permalink)
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TRD Thermostat, Need Opinions?

I'm planning to change my thermostat and thinking about buying the TRD
170F thermostat since I have recently installed NA stock ecu flashed by Charlie X where the the 2nd cam switchover is @5700rpms. Let me know, what you guys think. Thanks.
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Old 01-07-2013, 07:18 PM   #2 (permalink)
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I bought the 170*F generic one at Autozone (2001 Toyota Celica GTS). I think it was just the Stant brand. If its below about 50 or so it gets down to about 172 at highway speed, but generally it sits around 179 to low 180's.

On hot Texas days with the A/C on though your still going to see 200+.
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Old 06-07-2013, 11:17 AM   #3 (permalink)
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Why would you want a 170 degree thermostat? Do you know what your oil temps are with that thermostat?

Did you use a 2001 or 2003 Celica part? (In another thread you stated 2003). Is that a fail-open thermostat?

My thermostat is stuck open and I am going to replace that and my leaking overflow tank.
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Old 07-05-2013, 03:37 PM   #4 (permalink)
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I can chime in, but I only have more questions...

I installed the TRD 170F thermostat with the 3pass radiator and pull fans. My car is achieving temp stasis at 176F. So evidently it is running cooler !

I assume it will creep up back towards the 190F it used to sit at once I have the tune and associated kit installed next week.

I honestly don't know if there is any advantage to running a bit cooler or not ? I did research whilst it was all being put in place. I still don't know if better.

As I said above, my assumption is once the 2.9 pulley, fuel pump, fuel injectors are installed with the tune I assume it will creep back up a bit ? will see
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Old 07-05-2013, 09:31 PM   #5 (permalink)
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I've never tuned a Lotus but on other vehicles running much cooler than stock screws with the ECM, often can make it run like poo or lower power. I would talk to whoever did the tuning on your car before just throwing one in.

I can see putting in a cooler unit if you live in the butthole of the US (Texas) and it's 100* out though.
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Old 08-01-2013, 03:51 PM   #6 (permalink)
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I went with the 180 autozone one because it's all metal. The oem toyota one was starting the infamous plastic failure dance.
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