991 Window Buffeting Solution
03-10-2014, 11:00 AM
#17
Race Car
Based on the vids on the net of GT3s at speed, the buffeting in 991s with sport mirrors is the same as those without. They are available now from Suncoast, in all varieties of folding and non- apparently for style rather than performance.
03-10-2014, 01:46 PM
#19
GT3 is better, I've driven both. All cars have some buffeting, but 991 with standard mirrors is bad.
03-10-2014, 02:03 PM
#20
Burning Brakes
Indeed. For Cabriolet owners, the buffet problem is only with the driver's side down, and the rest up. All windows down on the cab (as if at a track) has no buffet.
07-20-2014, 03:25 PM
#21
Instructor
What would be a cool workaround (can't call it a solution, that would be Porsche dealing with this problem by re-molding the plastic driver side A-pillar piece to prevent this issue):
An anti-buffeting flap that pops out when you open the window and retracts again when you close it, like this parking protector:
http://dailypicksandflicks.com/2011/...otector-video/
(see video in the article)
So far I've only seen workarounds like this by http://www.blackmillperformance.com/:
An anti-buffeting flap that pops out when you open the window and retracts again when you close it, like this parking protector:
http://dailypicksandflicks.com/2011/...otector-video/
(see video in the article)
So far I've only seen workarounds like this by http://www.blackmillperformance.com/:
07-20-2014, 03:43 PM
#22
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After stating the problem above on my post of 3-10-2014, I installed the Blackmillperformance unit (http://www.blackmillperformance.com/) in our 2913 C2 Coupe (no sunroof) and it has worked to our great satisfaction.
07-20-2014, 04:53 PM
#23
After stating the problem above on my post of 3-10-2014, I installed the Blackmillperformance unit (http://www.blackmillperformance.com/) in our 2913 C2 Coupe (no sunroof) and it has worked to our great satisfaction.
Prefer something reversible.....
07-20-2014, 05:15 PM
#24
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The backing is pre-glued under a peel-away shield that is easy to remove. Though I have not had the need to try and they are attached solidly, I suspect the deflectors can be removed if necessary.
07-21-2014, 05:14 PM
#26
Instructor
Just look at this diy idea (taken from this thread; https://rennlist.com/forums/991/8252...t-ideas-2.html)
Here is the easy-on easy-off buffet defeater I made first from cardboard, then from plastic (thick juice bottle works well). It just lays over the plastic triangle and stays put when the door is closed. Only one is needed to totally end the obnoxious booming that starts at around 70 mph with one or both windows down. This one works to 120 it is rumored, not that I would know.... Judging from the ones planned for commercial sale, it might be overkill, but at the price the OJ was good and the bottle plastic a bonus.
Popping the back of the sunroof if you have one also fixes the problem. I made this one for use at the track where there is a ridiculous rule that the windows must be down and the sunroof not popped.
I had visions of my son printing these a dozen at a time and selling them for enough to buy a Turbo. But he thought the section that folds over where the door closes would have to be so thick (using the PLA stuff he had) that it might damage the window rubber trim. A printer that uses carbon fiber filament would be the ticket. So I settled for painted plastic or popping the sunroof and my plain old C2S.
Popping the back of the sunroof if you have one also fixes the problem. I made this one for use at the track where there is a ridiculous rule that the windows must be down and the sunroof not popped.
I had visions of my son printing these a dozen at a time and selling them for enough to buy a Turbo. But he thought the section that folds over where the door closes would have to be so thick (using the PLA stuff he had) that it might damage the window rubber trim. A printer that uses carbon fiber filament would be the ticket. So I settled for painted plastic or popping the sunroof and my plain old C2S.
07-22-2014, 06:59 PM
#28
I took a piece of thin cardboard, folded it so it was held in by the door when it was closed and filled the gap between the car and mirror, similar to the solution above, and it stopped the buffeting. So the good news, is that it is an easy fix. It was even sufficient to have it only on the driver's side, but I only tested one day on track, so can't swear both sides won't be better.
Now, who will come out with a solution that will win the hearts and minds?
Now, who will come out with a solution that will win the hearts and minds?
07-22-2014, 07:13 PM
#29
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With all due respect to the imaginative folks who crafted fixes out of cardboard and other waste products, I admire their craft. However, I wanted something more functional and fashionable for a Porsche. I did not mind spending $200+ to fix a problem in a $100,000 car. Please do not denigrate the effort. I bought my deflectors at http://www.blackmillperformance.com/. They work great and look great. They also cost > $200 and are worth it for me. Each to their own.
07-22-2014, 07:59 PM
#30
Race Car
With all due respect to the imaginative folks who crafted fixes out of cardboard and other waste products, I admire their craft. However, I wanted something more functional and fashionable for a Porsche. I did not mind spending $200+ to fix a problem in a $100,000 car. Please do not denigrate the effort. I bought my deflectors at http://www.blackmillperformance.com/. They work great and look great. They also cost > $200 and are worth it for me. Each to their own.
Of all the solutions that have shown up here so far, the one that SM_Atlanta tested (that apparently replaces the entire small plastic triangle) looks the least like an add on kludge.