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efhughes3's Avatar
 
Join Date: Aug 2002
Location: Bend, OR
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Air diverter to oil cooler at front under spoiler

Earlier today, I was playing with a side scoop to direct air flow to the oil cooler in place of the bellows. Here's a pic of what I worked up.



It is close to maybe working, but I started looking under the car and came up with the idea of doing something similar to what Porsche did with the air diverters for brake cooling on the 993. I took aluminum, and formed it around my oxygen bottle for the curve, then riveted it to the sheetmetal below the cooler. I support the front so that it is just above the skid "eyes" up front. I've got a DE this weekend. It will be warm, which usually means my motor will run hotter than normal on the track, so I'm looking for a way to temper the heat a bit. I'll see if it does any good; 5 or 10 degrees would be an improvement from the motor's point of view.












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Ed Hughes
2015 981 Cayman GTS
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Past:1984 911 Targa (Ruby), 1995 993C2 (Sapphire), 1991 928S4
Old 08-29-2006, 06:02 PM
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Sweet!

I just did my cooler this week-end! I'm interested in finding out your results. Hope they are good, looks great!

Paint it black for stealth!

Brad

edit: What about putting the back of the scoop on the front edge of the cooler. You'll get an extra inch of flow!
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Old 08-29-2006, 06:43 PM
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Were you having overheating issues?

I think I would block off the sides of the scoop to prevent the spillout of the incoming air.
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Old 08-29-2006, 07:06 PM
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Now were talking! This looks like themost effective scoop Idea yet. And invisable when flat black.
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Old 08-29-2006, 07:33 PM
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I'm definitely interested in this, please tell us how it works.
Old 08-29-2006, 07:44 PM
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I did something like that to my old RS-flared car. You can see a little of it in these pictures.





But you'll get the bigger gains from a fan (even at speed), and you'll get the biggest of all gainse from meticulously sealing off around the cooler. You've got to do more than just block the air, in my opinion. I actually used a roof-sealing caulk all the way around an aluminum shroud so that air absolutely had to go through the cooler, not through little gaps and cracks around it.

For track days, I went whole hog, with a cooler in each fender:

Old 08-29-2006, 07:57 PM
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Brando
 
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My thought was " I bet Jack knows from experience". So how much downforce you gettin now Jack?
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Old 08-29-2006, 08:14 PM
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Ed, I'm not sure your scoop is going to work, but I love your brakes and your shop lift!! woo hoo!!

You need to move a lot of air through the oil cooler. I've experimented with all sorts of ducting, fans, etc and found the best setup for the stock finned oil cooler is the plain old factory fan. That thing pushes a shocking amount of air through the cooler and down onto the ground via the louvers in back of the cooler.

Since hotter air is thinner air, on a hot summer day you'd have to be moving really fast to get air flowing through the scoop, and duct the flow directly on to the cooler. You need some 4" flexible clothes dryer hose or something like that. And you have to be going like 90+ mph.
Old 08-29-2006, 10:16 PM
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How about losing the driving light and ducting cool air to your cooler from there... you could make something that is removeable so if you want to put the driving lights .. or light back in after your events you could.
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Old 08-29-2006, 10:45 PM
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Thanks guys for all of the suggestions. Jack's point about the sealing is well taken, and is something I was looking at last night. I do hope to be going 90+ on the track!, so again, I'm looking for a little relief for hot track days. I've no problem on the street, even in the TX heat.

Ultimately, I'll probably go to a fan. The idea to do something just hit me as we've had a very hot summer. As it turns out, we'll get a bit of a break this weekend.
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2015 981 Cayman GTS
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Past:1984 911 Targa (Ruby), 1995 993C2 (Sapphire), 1991 928S4
Old 08-30-2006, 04:47 AM
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To clean uo the flow I would also lose the trumpet horns and replace w/ some pucks.

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Old 08-30-2006, 04:57 AM
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