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The mkiv Supra Owners Club

First track day and noticed


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Took my sup out on a small track over here with wee blips up to about 130 mph and a lot of heavy braking. After a few hard laps I noticed the temp gauge climbing which always used to stay in the middle on normal driving. So I back off and turn on the heater and it fell back down to the middle in no time. Is the normal or is there anything I can do to help this??

I just don't like the gauge being up in the red and don't want to cause any damage.

 

Thanks J

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hi there, glad to see you using the supe on the track thats what they were built for, but as for your high temps, not good,if your fairly stock the temps shouldent go up too much, ive done quit a bit of track work in mine and the water gauge has never gone above half way, the oil goes up a bit tho but a gauge is nice to keep an eye on things, so it sounds as if your rad might not be upto scratch, have a look at your coolant and if it looks dirty get it changed.hope this helps.

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If its Kirkistown you were on, your temp needle should not go more than about 3 to 4 mm higher than normal road driving.

Flush out coolant system and refill with the genuine toyota stuff, or you could also try "water wetter" which I hear great reports about.

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Took my sup out on a small track over here with wee blips up to about 130 mph and a lot of heavy braking. After a few hard laps I noticed the temp gauge climbing which always used to stay in the middle on normal driving. So I back off and turn on the heater and it fell back down to the middle in no time. Is the normal or is there anything I can do to help this??

I just don't like the gauge being up in the red and don't want to cause any damage.

 

Thanks J

 

Have you got a front mount intercooler on the car?

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... you could also try "water wetter" which I hear great reports about.

water wetter is only really effective if you flush the whole lot and use it with pure distilled water.

Then it makes a big difference:) , but it's really the lack of antifreeze that does the job, not the lower surface tension (but it wouldn't hurt)

 

If you just add WW in an existing 50/50 mix don't expect to see any difference.

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I'd say your radiator is knackered....even with an FMIC it shouldn't really fluctuate.

 

This sort of behaviour was what I experienced before my Rad stopped working.

 

I would look for a new rad now, before it stops working in normal traffic.

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With a front mount it can happen even if your rad is perfectly fine, believe me I've done ALOT of track days over years, starting from when my car was more or less std up until its current state. I could hack round all day when I had a std intercooler, soon as I fitted a front mount temps starting going sky high after a lap or 2. The one thing that solved the problem was an oil cooler, after that I've had no problems. We still dont know if he has a front mount or not though! So it may be the rad yes.

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Paul's right about the oil cooler. When you really push a road car, the oil temperature normally rises which in turn, raises the engine tempetature. Oil coolers are the main thing that get fitted to competition production class cars to cope with that. I couldn't tell you if your intercooler was designed to do that but if not, as Paul said, fitting one should solve the problem.

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Have you got a front mount intercooler on the car?

 

No mate it's the std side mounted one , Chris wilson said it was spot on and didn't need changed.

 

Engine mods Chris has done for me are Hks cams,water injection,colder plugs,full decat with nur spec and think thats it.

 

So maybe now thinking my rad is f**ked? :( More money !!

 

What's the best one to go for and a oil cooler??

 

Thanks Lads

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water wetter is only really effective if you flush the whole lot and use it with pure distilled water.

Then it makes a big difference:) , but it's really the lack of antifreeze that does the job, not the lower surface tension (but it wouldn't hurt)

 

If you just add WW in an existing 50/50 mix don't expect to see any difference.

 

I didnt know you could use it any other way other than fresh distilled water and WW. I still think the car has a fault in the cooling system, Whether its the local 2 mile track or the Nurbergring, supra engines dont boil up in my experience even with big tubs, you'd be best to get the cooling system working properly before adding other bits or it may be a "brushing the dirt under the carpet" move. IF you car has been run with either old and done coolant, or just water, you probably have a corrrosion issue, perhaps a part blocked rad or heater rad? go investigate!.

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Sounds like the rad then, you'll soon know when its removed. Best off with Fluidyne rad with one of my oil cooler kits, they work wonders on my car!

 

 

 

Cheers will do Paul i'll have a look and see what the crack is,i'll give you a shout about the oil cooler kit as well. ;)

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I didnt know you could use it any other way other than fresh distilled water and WW. I still think the car has a fault in the cooling system, Whether its the local 2 mile track or the Nurbergring, supra engines dont boil up in my experience even with big tubs, you'd be best to get the cooling system working properly before adding other bits or it may be a "brushing the dirt under the carpet" move. IF you car has been run with either old and done coolant, or just water, you probably have a corrrosion issue, perhaps a part blocked rad or heater rad? go investigate!.

 

 

Yes will have to flush it all out not too sure when it was done last :blink:

I'll give the car a good service and check out the rad as well. Cheers Bud

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I didnt know you could use it any other way other than fresh distilled water and WW. ..

Neither did I, but there are people out there adding WW to their existing old coolant mix and then wonder why water temps don't get any lower.;)

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We sell water wetter. You can fluch with tap water, but you need to make sure its all out after.

 

Make sure all the tap water is out after? How do I do that, with a vacuum? I've got two bottles of it already along with the distilled water, thanks.

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