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Reply to "911 cooling mods"

Got a nice Allen key plug which is way thinner to replace that big ugly hex head at the VW dealer. I think it fits a modern Golf/Jetta, 14 X 1.5mm thread.

 

Anyway, temps are what is important here. I used to run 270-280 in cylinder number 4, which is my hottest one. In traffic, it would creep up slowly when stopped to 340! But once the speed picked up it would cool down considerably back to 270.

 

Oil and fan thermostats are set to 180, and the VDO combi-gauge with no numbers on it sits at slightly less than 1/3 from cold. The fan turns on more often, as I'm dumping hot air from the cylinders toward the cooler, but stays controlled.

 

Now, it runs 250-260 CHT, and creeps up at slow fan speed at idle, but never gets over 300. It only creeps up when parked, and it takes a lot longer to do so. Before it would be a couple minutes, now it is about ten. Any car movement at all and the head temp doesn't move, so I'm calling this a success.

 

I have a remote 96 plate cooler over the trans and oil and electric thermostats to control oil flow and cool the cooler. I'm using a Wix 1515 filter(1 full quart) and obviously full flowed, with a Berg cast iron pressure relief cover. Full capacity is 6.5 quarts, about 5.5 for an oil change.

 

Yesterday I pulled a long grade going up a mountain in 4th doing about 55-60 and 2400-2500 rpm. The CHT never moved. It was 85 ambient. I can run 3-4000 rpm at 70-85 for as long as I want up hills and it doesn't seem to care. It just stays at 250-260. Down hills off-throttle it cools down to 220.

 

Now I can drive cross-country and not worry about desert temps!

IMG_20150330_154053433[1]

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Last edited by DannyP
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