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Hi All,

RB25/30 with all coolant lines blocked/removed (only have turbo water feed and radiator in/out)

Greddy FFP

PWR radiator

So basically my issue is that no matter what thermostat I run my operating temperature is always 84 degrees.

Have run an 82deg, 76deg and 65 deg genuine Nissan thermostats and it always gets up to 84deg and just sits there happy as. The 76 and 65 thermostats were not brand new. Second hand with unknown k's but looked in good condition.

I have used both clutch fan and thermo fans with no difference. Weird that it always ends up sitting at the same temp no matter the thermostat.

Any advice appreciated as to how to fix this issue, thanks.

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All thermostats work as advertised in a pot of water. That's why it's such a head scratcher for me.

I know 84 is probably pretty good but car does get a little hot and was wanting some more headroom for Queensland drift matsuri as it's going to be hot as f**k up there.

Wow interesting, I run a 67 degree Tridon "high flow" thermostat and she runs about 72 to 75 normal operating temp.

Time for no thermostat, since track car right? Lol

I've heard a couple of people (one was a largish workshop) say you should never run without a thermostat because it has an effect on the water pump's operation. Apparently running a gutted thermostat is ok tho (if you're not worried about the startup/cool running implications)...

I would think 84 deg is fine. Do you have an oil cooler for track use?

You'll he surprised how fast it hits 100.

The more head room you have the better, I find that now I've swapped to a lower temp thermostat and adjusted my temp tables to suit (65 degrees is when all my fuel compensations are disabled) I'm able to do more hot laps at Wakefield before it gets a little too hot.

  • 4 weeks later...

Considering I have some (apparently useless) thermostats here, how should I gut them? I would be happy to run no thermostat if it comes to that but if it's better to take half the internals out I will just do that.

No I have not tried multiple senders but that's something I could do. I trust the current one though, has worked perfectly for ages and goes up and down with the temp. It's just that the base temp is above what it should be is the issue.

Might go grab a brand new tridpn one from repco and I may be able o take it back if it is the same as I have one of those repco club cars thingys.

Of course I will to begin with, but if it comes to it I'm happy to take it out if it means I can keep skidding.

I was asking for advice about what part to 'gut' to get the best of both, enough restriction to give coolant in the rad time to cool down and to keep the circuit somewhat isolated.

Yes I know that kiwi, I think you need to re read my original post. No matter what temp thermostat I put in it, it still idles at 84deg. The current thermostat I have (65deg) should be regulating the idle temp to 65ish degrees but it's still sitting at 84.

And yes I have properly bled the system.

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