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#1
March 22nd 2004, 11:15
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Cooling Question
I have a '68 Beetle that has a turboed 2110 and am looking for some ways to cool it. I have a tranny that has a 3.88 R&P and .82 4th. My engine builder thinks that I will be under revving it and it will build up heat due to reduced fan speed.
So, I had the idea that since Jake did tests that show that the 911 fans work better when there is not quite as much air trying to be forced through it, it would be a happy medium. Instead of using the hole drilling method that he used, would my reduced RPM from the transmission along with a good fan ratio be enough to get it to that point of good cooling. I would really like to use a 911 fan because I have one and it would also free up a lot more room for the turbo setup. But, if it is going to destroy my engine if I use one then I won't. Thanks for your help, fast70 
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#2
March 22nd 2004, 13:45
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911 fans don't kill engines, they just don't run as cool as other set ups do.
My main emphesis on the tests were to find out what works and what don't, and which ones drwaw the most power. The 911 fans without a doubt sucked up more power, and the head temperatures were al over the place. Eneven running temps increase your chances of warped heads, cylinders and head leaks due to them. keeping the engine above its optimal temperature also effects efficiency and hurts power as well as fuel economy. It will gain you some room, but thats about it. It will also gain plenty of eyes from guys that haven't yet found out the truth for themselves.... Alot of guys look up to 911 cooling systems as being the only way to keep an engine cool..... I look down upon them from a position that cost me alot to reach the summit of.
__________________
Jake Raby
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#3
March 23rd 2004, 00:49
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Jake,
If you don't mind me asking, what modifications did you do to the 911 shroud to make it run cooler? Any info would be great. If this is priviliged information, you don't have to tell me or if you could send me an email. This is just for my use only. Thanks for the help, fast70
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#4
March 25th 2004, 00:31
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Drilled holes in the shroud!!!
__________________
Jake Raby
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#6
April 1st 2004, 20:46
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Nickies would most definately resolve cooling, sealing, and longevity issues. We have customers running our 90.5 and 92mm Nickies, under boost, both of which use registers of a 94mm cima/mahle, so the walls are extra thick!
Charles Navarro LN Engineering http://www.LNengineering.com Aircooled Precision Performance
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