Interesting Thread! The vw bug has a Cd value of 0,48.A teardrop has 0,05 and an average aircraft wing profile has 0,08.The funny thing is a T2 vw bus has a cd value of 0,44 eventhough it has a larger surface area up front,it is much longer than the bug,which gives it an overall better value.
The bug´s aerodynamics are greatly improved by lowering the vehicle and adding spoilers as everyone knows.However,I haven´t seen any values to compare.
Some of the Käfer Cup bugs and a few of the hillclimb bugs have slots or holes in their fenders and some run shorter rear fenders allowing more air to pass out the back.If your racing,looks aren´t as important as function so I doubt that anyone is really going to adapt that to their street car.

I didn't realise a bus has a better cd :)

However cd is ratio thing so a brick has a cd of 1 regardless if it is the size of a Lego block or the size of a house. You multiply the cd and the frontal area to get the drag figure.

Rear Spoiler
 

Why don't you get one of these and make a mould of just the part you want.
It tucks under the window rubber.

I have one of those. I don't think it would help aerodynamically. Do you have a picture of the part that it mounts onto? (the part that actually tucks under the rubber). I'm missing that and it would be nice to see what it looked like :)

I think everyone's seen my aero by now, hard to miss...

http://i93.photobucket.com/albums/l4...5.jpg~original

Large vents in the front fenders seem to help a bit but I won't know for sure until I take it to a race track. The rear wing is almost necessary above 120, and can be felt as low as 50-60mph. I've also trimmed up the rear fenders to help them air out a bit as well. Currently I'm working on front aero which is not present and the bug understeers as a result. With the airdam and splitter in place the balance should be a lot better and I'll be able to dial in the rear wing properly.

For street use something above the rear window is best. A small strip like carbon joe did but a little bit taller, 2.5"-3" from drip rail to drip rail, would be ideal. Vents in the top of the front fenders might work for the street but I don't think they will be as effective, however they won't ruin the paint on your rear fenders.

A 1302 and 1303 seem to have a different characteristic than an older (pre -67)1200 bug.I rode with Armin Klein in his bug on the Autobahn here in Germany.We were doing 257Km/h (160mph) passing a Porsche Boxster S at full speed.He uses an inductive type digital speedometer.Even it may be 10Km/h off that´s still pretty quick.I didn´t notice any lifting or instability whatsoever.He has no spoilers whatsoever.He has a Remmele Uni-ball set up in the rear,the front is a standard lowered front beam.It´s a daily driver that he races regularly.Here are some vids of the car while racing.

http://www.myvideo.de/watch/6952465/...zburgring_2009 - open track day training in Salzburg

http://www.myvideo.de/watch/6952429/...g_Classic_2009 - race in Salzburg

http://www.myvideo.de/watch/5607224/...e_Leipzig_2008 - Porsche track day in Leipzig

www.turboboxer.de

And me. here is fine or a pm :) perhaps could combine on the international shipping?

Sorry haven't got the spoiler anymore, otherwise I would have taken some more photos for you.
I remember it being small pieces of z shaped metal with a hole drilled in it, then a plastic screw, screwed through the spoiler into the metal hanger, which was wedged under the rear window rubber seal... clear as mud I know

And me
Here is ok or pm me
Am also interested in combined international shipping?

I just put you guys on a list, once I finished a couple and know the price, I will inform you.:)

Thanks, I think I got the picture :) All I seem to be missing is the z-shaped metal pieces. I think I actually have the plastic screws too.

Hi

I owned flat screen bugs for years, Ovals, 40 hp bugs, late standard bugs & 1302s. Until a few years ago I had never owned a 1303 long term.

Seat of pants stuff, but the 1303 with its round front screen does feel much more slippery than a flat screen bug.

Steve

I haven´t been over 100mph in a 1303 yet,I never owned one either,so I lack the comparison. The 1303 does seem much quieter (wind noise) than the standard bugs,so there must be an aerodynamic improvement.Maybe the front of the 1303 has some disadvantage compared to the 1200 due to the round front valance? Technically the 1303 is far better than the standard bug,no question about that.

Lucky you said that here and not The Samba :lmao:

LOL!!! They will also tell you that the Cal-look rake is the best for aerodynamics!