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Posted by: naro914 Oct 12 2011, 08:17 PM

300 RWHP - gonna be a fun in a 1800 lb car, huh?!

so...thoughts on downforce? I'm gonna need a way to keep Papa planted. Need some ideas of a wing/splitter.

Pictures? Options?

Here's a picture of Papa Smurf:




TIA

Posted by: URY914 Oct 12 2011, 08:28 PM

GT Racing has a good 914 wing system.

Posted by: naro914 Oct 12 2011, 08:36 PM

Really? I never found anything on their website.

Posted by: carr914 Oct 12 2011, 09:54 PM

They definately do - Their Uprights are a little Crude though

Posted by: carr914 Oct 12 2011, 10:03 PM

Here are a few to ponder

Posted by: Van914 Oct 13 2011, 05:10 AM

Posted by: sean_v8_914 Oct 13 2011, 10:38 AM

rename this the ultimate 914 wing collection
all these examples are flying in clean air above the stream
be ready to make spring changes again
Has anyone ever studied teh rudder effect that a wide upright might have at speed?

Posted by: PeeGreen 914 Oct 13 2011, 10:39 AM

No a great picture of the wing but one of my favorite 914s


Attached image(s)

Posted by: naro914 Oct 13 2011, 11:08 AM

Good points.

My first race at CMP in a few weeks will be wingless, so we'll see how it goes. I have to balance functionality with looks - Nadine doesn't want the 'kid ricer erector set' look. And hey, gotta do what she wants.....she makes all the money in the family.

We were thinking of using a 996 cup wing. Size is good, and fairly available. Besides, it was designed by Porsche, so you know a lot of research went into it. That was the recommendation of Autometrics...

The two silver ones above have my body kit too I think...

I like the side intakes and front cooler air over the hood in the # 286 above

Posted by: sean_v8_914 Oct 13 2011, 12:32 PM

996 cup wing is designed to fly in the slip stream (dirty air). some rules limit wing height due to the obvious advantage that clean air offers. that 996 wing is a serious engineering feat. I think they were limited on surface area also. clean air wing design is simple when compared to a successful low wing design

that air exit type is well proven in 917, GT40 ect...I want to do my v8 radiator exit that way

Roger's wing is huge AND he runs a Gurney flap, wow. notice how flat he runs the angle of incedence while 286, 13 and 170 run a steep angle. when we measured force I was astonished at how quickly it ramps up above 120 mph even with little incedence.

who's rule book do you build to?

Posted by: naro914 Oct 13 2011, 12:42 PM

PCA club racing GT class.... i.e. displacement to weight. All else is basically free...

I know the air exit is a good idea. I've just been leery about cutting into a carbon fiber hood... And I need to change the oil cooler set up...

Posted by: URY914 Oct 13 2011, 12:54 PM

Go big or go home.....

Posted by: jhadler Oct 13 2011, 03:38 PM

Of the pics shown here so far, I think I would try to emulate some of the designs used with car #80 or #998. The adjustable angle of attack is likely to be something you will want (easier than changing springs). And you will certainly want the wing up in the clean air. But balance with a good splitter will be important.

-Josh

Posted by: sean_v8_914 Oct 14 2011, 07:01 AM

isnt 80 the v8 guy that shows up at willow alot? same look but I dont recall the stripe

Posted by: carr914 Oct 14 2011, 08:03 AM

Just buy a few cans and build your own

Posted by: Randal Oct 14 2011, 09:48 AM

Great wing. Check out the single cross member.

Posted by: sean_v8_914 Oct 15 2011, 10:34 AM

that wing is huge...how much does it weigh

Posted by: Randal Oct 15 2011, 10:46 AM

It was CF, so not much. The upstands were alumimum.

Don't have the car anymore, so can give you an exact weight.

Posted by: sean_v8_914 Oct 15 2011, 02:33 PM

that wing poke is aimed at Ury914
the beast wing is reasonable looking

Posted by: URY914 Oct 15 2011, 04:28 PM

My wing weighs less than yo momma.

Posted by: Russ Oct 16 2011, 07:37 PM

What about this one? It is very nice...

How much did you say Nadine makes???

Posted by: Brett W Oct 17 2011, 09:10 PM

APR makes some nice wings, they are used throughout SCCA, NASA, World Challenge, Grand Am, etc.

I sell a wing that is SCCA GT legal, I do a carbon version and Fiberglass version, the wing comes with end plates and you could cut your own as well, plus wing mounts. According to the calculations of my aero guy at 150mph it will generate around 400lbs of negative lift with a drag rating of under 40lbs.

I installed one on a GT2 RX7 and we ran it at just under 15 degrees for the first test session and the driver complained about the steering getting light at top speed. We had to back it down slightly to balance out the car with the front splitter. Driver liked it better with it down around a 10degree angle of attack.

Posted by: Britain Smith Oct 18 2011, 12:40 AM

Got any picture Brett? How much downforce does it make at 60mph?

-Britain

Posted by: sean_v8_914 Oct 18 2011, 12:15 PM

wind resistance being non linear and what not....an AX wing should be huge ALA Ury914 or sprint car type with steep angle of attack and can be mounted lower on a non windshield car that will not be drafting in traffic.

Posted by: sean_v8_914 Oct 18 2011, 12:28 PM

I love that Ron Mistak 914 GT 1

Posted by: Brett W Oct 19 2011, 07:37 AM

Yup, see attached. I don't think I have a close picture of the wing itself though. I built the mounting system according to customer request. He wanted to make it removable to so he could keep running HSR. I made the end plates significantly larger than the spec plates because we were running in an unlimited class.

My recollection was wrong, there is only a 3.24lb drag penalty, at 150mph it will generate 475lbs of negative lift at a 10 deg angle of attack. I can't find the chart for the wing data, so I don't have the graph of numbers through the speed range.

If your using it for Autox, I would look for something bigger and just accept the drag penalty. Something in a multi-plane, look at the Unlimited cars, copy their setups. They will be really effective at parking lot speeds.


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Posted by: J P Stein Oct 19 2011, 06:32 PM

Mistak's wing is the only one close to legal in SCCA AX out side of A Mod.

Posted by: Heater Guy Nov 2 2011, 11:53 AM

This is a 68" wing from Paul Brown (Tiger Racing).

Posted by: spare time toys Jan 16 2012, 10:03 PM

here is a couple from my way back file. I wish I could have finished this one

Posted by: Randal Jan 16 2012, 10:27 PM

I like the (safe) cage in the second picture. That would make a good hill climb car.