Pictures from weekend @ Willow Springs, too hot - questions... |
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Pictures from weekend @ Willow Springs, too hot - questions... |
siverson |
Jul 12 2004, 04:00 PM
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#1
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Advanced Member Group: Benefactors Posts: 2,448 Joined: 5-May 03 From: San Diego, CA Member No.: 654 Region Association: Southern California |
I spent the weekend at the NASA event at Willow Springs. It was pretty fun, and a very fast track - 125 on front stretch, about 105 or so on the back stretch. Turn 8/9 right at about 90/100 mph. Yowzers. I had never driven on that fast of corners before.
It think it was about 105 degrees out too, and my car started to get too hot in the afternoon sessions. I actually had to stop the 20 minute run sessions early. I was quite surprised by this, as I had previously been concerned that the car is running too cool on the freeways. Hmmm... I'm running a 3.6 with a front mounted Mocal cooler that's 20x6x2 or so. Another 914 there had a 4.0 (from a 3.6) with the factory C2 cooler under the rear trunk AND a front mounted cooler that was 16x6x2 or so. I think my DME programming might still be a little off (too lean) contributing to the heat. I'll have to check it out. Does anyone have any real world experience with the GT engine lids? Do they really make a cooling difference? Anything else to consider besides fuel/timing and engine lid before I start cutting away for a second cooler somewhere? -Steve Attached image(s) |
campbellcj |
Jul 13 2004, 08:43 PM
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I can't Re Member Group: Members Posts: 4,549 Joined: 26-December 02 From: Agoura, CA Member No.: 21 Region Association: Southern California |
Hey, what the heck is Jack "Mr. 911" Olsen doing over here. Thinking about a turn to the dark side of mid-engined mania?
Steve - your cooler setup looks quite similar to mine and assuming it is getting proper flow and the t-stat is opening correctly, etc, I doubt you'll be able to improve on it much. The shrouding on mine might be angled more (i.e. ram effect) and I do have a huge 32"x7" opening in the front bumper area for intake; the outlet is a large opening in the trunk floor under the cooler. The degree of metal cutting is not for the timid. I had forgotten however that the 3.6's don't have an engine mounted cooler, so maybe an auxiliary cooler as Jack mentioned is worth exploring. Clearly there are lots of 911 racecars who've figured out a viable solution and can even run long enduros. You might want to check with Chuck Moreland @ Elephant Racing as he's done quite a bit of research into oiling systems and cooling solutions. I am currently running 15-50W Mobil1 but might switch back to 20-50W dino to keep the costs and leaks under control. Also BTW you should have a quick chance to glance down at the gauges in the 7-8 area (back straight) before turning into the almost top-speed turn 8 section. |
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