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Old 04-20-2019, 12:16 AM   #21
feynmanfan
 
Join Date: Aug 2018
Location: Cincinnati
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Default Re: High roof sprinter with rack

This is a 144 with a Prime Design rack. The advantage is you can put the cross bars anywhere. I also have an AC and vent fan. The AC is the highest point by a few inches. Mach 8
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Old 04-24-2019, 12:52 AM   #22
lruss
 
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Location: West Sac
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Default Re: High roof sprinter with rack

wrong vent and wrong colour but it is a high top
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File Type: jpg rack 1.jpg (123.4 KB, 84 views)
File Type: jpg rack 2.jpg (99.9 KB, 77 views)

Last edited by lruss; 04-24-2019 at 12:54 AM.
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Old 05-20-2019, 04:09 PM   #23
flyag1
 
Join Date: Feb 2012
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Default Re: High roof sprinter with rack

Quote:
Originally Posted by THE View Post
Interested in that air dam up front?
Actually that air dam is causing some issues. I'm no engineer so everything I build is mostly based on a common since approach. Being a pilot and understanding the drag associated with flat surfaces I decided to try to direct the airflow over the top. So the dam was constructed with about a 3/16 gap between the dam and the top of the Sprinter. I knew going in there was a possibility of air lifting up the dam or worse the air flow could cause flutter. And sure enough the first time I took it for a test drive at about 80 MPH it did just that, I hit the brakes and it stopped immediately. I could slid the whole rack to the rear of the van and close the gap between the Sprinter and the Dam, but I suspect the rack would eventually rub the top of the sprinter. Especially knowing how much these vans flex.

Therefore I decided to try a layer of gray tape between the dam and Sprinter roof and this time no flutter. I've put about a 1,000 miles on the van with no issues since I sealed the air gap. Thanks to Amazon I now have a roll of rubber seal I'm going to install that should work equally as well as the ugly tape, I just need to get it installed.
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