THIRD/CENTER RADIATOR INSTALL DIY 06 Carrera S
#32
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I ran White Group all three days. Must have missed each other at Tech. I remember seeing your stand out car at the track and then when I got home and onto Rennlist it hit home - oh him!
I did notice my oil temps climb really high on track, did the 3rd rad really help at all with oil temps? (yip I know it's a water rad)
I did notice my oil temps climb really high on track, did the 3rd rad really help at all with oil temps? (yip I know it's a water rad)
#33
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jacks stands were on the hard points aft of the suspension linkages and were back ups, jacks were on the main jack points.
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it was exactly same question I asked - rate of oil temperature increase is much higher than rate of water temperature increase so I was wondering if additional sq. ft of water cooling helps in any way to control oil temperature increase rate or only solution there is to use oil intercooler or other more complicated methods.
so we are not really getting the real-time variations of the water temps.
#34
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We(at least the 997s) have dummy water temp gages.. see ... https://rennlist.com/forums/997-foru...tter-what.html
so we are not really getting the real-time variations of the water temps.
so we are not really getting the real-time variations of the water temps.
A third radiator may be needed in extreme track temp cases, but I do not agree that is needed (or desirable - extra weight) in all cases. Like insurance, there's no point in being over-insured.
#35
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Though, I dont think there's any mention of "that its needed in all cases" anywhere in this post.
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sierra73 (06-06-2023)
#36
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These gauges are dumbed down. Unfortunately, they have been dumbed down to the point that they are useless for warning you that you are getting into damage territory. By the time they move up to the top part of the gauge the heat is already there and been there. Too late to react.
#37
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The temperatures indicated by the water gauge don't always make sense. Here are my observations on a 997 2S:
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
#38
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The temperatures indicated by the water gauge don't always make sense. Here are my observations on a 997 2S:
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
Using a low temp thermostat never made sense to me either.
#39
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The temperatures indicated by the water gauge don't always make sense. Here are my observations on a 997 2S:
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
#40
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The temperatures indicated by the water gauge don't always make sense. Here are my observations on a 997 2S:
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
-Third radiator installed. No apparent temperature changes from the usual 175 degrees in any operational mode. Oil temperatures unchanged.
-Hit a road alligator & busted up the air duct plastic on the left side of the car. In 90+ degree temps, had gauge readings up to 195 degrees. Fixed it & back to normal.
-Had an LN Engineering 160 degree thermostat assembly put in. Coolant temperatures stayed at the 175 degree mark under all conditions.
-Oil temperatures decreased from 220-230 to 210-220 degrees. Generally 10 to 15 degrees.
-The car warmed up slower under all conditions, according to the water temperature gauge.
Lower oil temperatures with a thermostat retrofit are a real benefit, but it sure doesn't make sense from the car's instruments. But, low cost and no downside.
#41
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Hi there
I've added the X51 radiator to my car.
No changes in water temperature at all.
However oil temperature on a spirited drive is much improved.
Previously a spirited drive on a hot day could see oil temperature in the 115c region.
Now same kind of drive after the 3rd radiator added the temp struggles to pass 105c and once you return to driving normal the car cools faster.
So the centre radiator is a very worthwhile addition, it has no effect on the normal 92c operating temperature in normal conditions, but it drops peak temperatures vastly when you having a spirited drive. Making it ideal for anyone who is doing track days etc.
Also regarding lower temp thermostat, there is a free and easy mod where you can just set your cooling flow to maximum at all times which again helps to lower peak temperatures.
I've added the X51 radiator to my car.
No changes in water temperature at all.
However oil temperature on a spirited drive is much improved.
Previously a spirited drive on a hot day could see oil temperature in the 115c region.
Now same kind of drive after the 3rd radiator added the temp struggles to pass 105c and once you return to driving normal the car cools faster.
So the centre radiator is a very worthwhile addition, it has no effect on the normal 92c operating temperature in normal conditions, but it drops peak temperatures vastly when you having a spirited drive. Making it ideal for anyone who is doing track days etc.
Also regarding lower temp thermostat, there is a free and easy mod where you can just set your cooling flow to maximum at all times which again helps to lower peak temperatures.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
#42
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very well done/documented
#43
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Hi there
I've added the X51 radiator to my car.
No changes in water temperature at all.
However oil temperature on a spirited drive is much improved.
Previously a spirited drive on a hot day could see oil temperature in the 115c region.
Now same kind of drive after the 3rd radiator added the temp struggles to pass 105c and once you return to driving normal the car cools faster.
So the centre radiator is a very worthwhile addition, it has no effect on the normal 92c operating temperature in normal conditions, but it drops peak temperatures vastly when you having a spirited drive. Making it ideal for anyone who is doing track days etc.
Also regarding lower temp thermostat, there is a free and easy mod where you can just set your cooling flow to maximum at all times which again helps to lower peak temperatures.![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
I've added the X51 radiator to my car.
No changes in water temperature at all.
However oil temperature on a spirited drive is much improved.
Previously a spirited drive on a hot day could see oil temperature in the 115c region.
Now same kind of drive after the 3rd radiator added the temp struggles to pass 105c and once you return to driving normal the car cools faster.
So the centre radiator is a very worthwhile addition, it has no effect on the normal 92c operating temperature in normal conditions, but it drops peak temperatures vastly when you having a spirited drive. Making it ideal for anyone who is doing track days etc.
Also regarding lower temp thermostat, there is a free and easy mod where you can just set your cooling flow to maximum at all times which again helps to lower peak temperatures.
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
#44
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I've added the X51 radiator to my car. [...] a very worthwhile addition, [...] drops peak temperatures vastly when you having a spirited drive. Making it ideal for anyone who is doing track days etc.
Also regarding lower temp thermostat, there is a free and easy mod where you can just set your cooling flow to maximum at all times which again helps to lower peak temperatures.
Also regarding lower temp thermostat, there is a free and easy mod where you can just set your cooling flow to maximum at all times which again helps to lower peak temperatures.
I'm not opposed to mods for their own sake, and I'm considering some on my own car, but they will be personalization, not a misguided attempt to out-think the guys who designed this lovely piece of machinery.
Just for the record, my car never gets the coolant more than half a needle width above 175 degrees either. But it ain't painted on or faked in some silly way. That's obviously the target for the feedback control loop and the feedback works. The oil temperature rises and falls with engine workload, which is what it should do. (In fact, that's what it must do.) Usually, here in the desert with a brisk driver, my oil temp is 200 degrees. On a track day after the longest session, I saw 230 I think it was. I would be comfortable up to at least 275 though a reading like that certainly would get my attention. I don't know what I'd need to do to get it up that high. Pull a house trailer up "The Grapevine" probably.
On a 997 engine, the fuel system alone takes into account outside temperature, temperature of the flow control valve, operating duration, load point, tank filling level, and idle period prior to vehicle start. And some people think they don't know how to pick a thermostat?
It's my car. I'm going to have fun with it and mod it as I please, but I'm not kidding myself that I'm improving on the design efforts of Zuffenhausen. I just do it because my taste is my own taste, and it's my car.
Gary
#45
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[QUOTE=simsgw;8772088]We do not have a 'dummy' water temperature gauge;
No, it is not a dummy gauge. It functions, however, more like an idiot light than an accurate gauge. It will register temps over a preset threshhold in the same way that a light would go on to tell you that you have a problem. If you think that your coolant temps stay rock steady as indicated I have a bridge in germany for you to buy
I do not understand why you think it is not desirable to lower "peak" tempreatures if peak is defined as a sharp spike in temperature caused by a sudden application of throttle when the thermostat is less than fully open. if you are referring to average temps of 200-250 I agree with you. I am surprised that you find temps stay at 200 during "brisk driving' in such a hot clime but that sounds great. Nice dog.
No, it is not a dummy gauge. It functions, however, more like an idiot light than an accurate gauge. It will register temps over a preset threshhold in the same way that a light would go on to tell you that you have a problem. If you think that your coolant temps stay rock steady as indicated I have a bridge in germany for you to buy
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