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) |
john rogers |
Jul 14 2004, 12:59 PM
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#2
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Senior Member Group: Members Posts: 1,525 Joined: 4-March 03 From: Chula Vista CA Member No.: 391 |
When Chris Burns was racing his RSR motored 914 several years ago he had lots of trouble with high temps. They did several things to get them down, including an air deflector at the rear edge of the targa top to force air into the grill openings which were GT style. I ran a deflector on my big four as it had the same trouble and would lower temps by 20 degrees. Additionally, they made sure all the engine sheetmetal and rubber seals were there since even at speed if they are missing the fan can still suck hot air from under the car. When I did my six conversion I took great pains to make sure I had the cool top side well sealed from the bottom. Lastly, I would install some sort of air deflector in front of the cooler exit as Chris has noted there needs to be a low pressure there to help suck out the hot air. Good luck
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