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Old 03-15-2012, 05:15 PM   #1
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Default What is considered normal hot track coolant temp?

For a mild turbo Miata and ambient temps of 90-95*F, what would be considered normal high coolant temp on the track? At what point should I consider backing off and letting it cool down?
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Old 03-15-2012, 05:49 PM   #2
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I see 205-215 degrees on track in the Southern Cali summer (up to 100 degrees). I'm hotside supercharged with a Koyo 37mm radiator and 949 reroute.

Haven't had any issues yet. I would probably back off if I go to about 230 degrees.
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Old 03-15-2012, 08:05 PM   #3
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Anything north of 225-230*F makes me nervous.
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Old 03-15-2012, 08:19 PM   #4
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Depends on your radiator cap and oil temp differential.

I run ~250F water/270 oil on a hot day with a 21 PSIG cap. Not a lot of headroom there. I bail out @ 253.
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Old 03-15-2012, 08:45 PM   #5
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I have my boost cutout set at 235F. It's what it was set at when I bought the car.
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Old 03-16-2012, 05:42 PM   #6
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Quote:
Originally Posted by Savington View Post
Anything north of 225-230*F makes me nervous.
That's about what I was thinking.
Quote:
Originally Posted by TimM View Post
Depends on your radiator cap and oil temp differential.

I run ~250F water/270 oil on a hot day with a 21 PSIG cap. Not a lot of headroom there. I bail out @ 253.
Holy crap! I actually winced just reading that. On what oil?
Quote:
Originally Posted by Zefiris View Post
I have my boost cutout set at 235F. It's what it was set at when I bought the car.
That's a good idea.

I'll see what safety settings might be available in the various megasquirt menus that could keep me out of trouble.


Anyone else with experience?
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