Shaved rain gutters and high speed aerodynamics
#31
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I have the Ruf a-piller fairings, and they should be quite effective. Less-so than shaving the entire a-piller, which should also help that air-flow disturbance on the front glass plus reduce the cross-section a small bit. This still leaves the question about shaving the entire rain gutter which may or may not yield an aero advantage. The "seat-of-the-pants" evidence indicates that it may help. Thanks for all the contributions so far. Keep 'em coming.
#32
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Despite Porsche planning to redesign the roof for the 993 (sans gutters ala 996), I am glad they kept them. Just an iconic feature of the classic!
#33
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It seems that building the old cars without the gutters would be a serious redesign. They're pretty integral to the way the car is assembled. There weren't many cars built in 1998 that still had gutters.
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Bradford,
Correction, cyclists shave their legs because it makes it easier to treat road rash in a spill without having to deal with hair all over the place.
Correction, cyclists shave their legs because it makes it easier to treat road rash in a spill without having to deal with hair all over the place.
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Originally Posted by ca993twin
There weren't many cars built in 1998 that still had gutters.
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#36
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I'm new here; should have introduced myself before. Great site. Love the info, arguments, etc.
Actually I have both a 993TT (97), which is here in London and a Ranger which is back at the house in Napa. The TT is a daily driver (well, not daily;nobody drives daily in London if they don't have to) and stays parked on the street the same as urban-alchemist and for the same reason.
Cheers, as they say over here!
Actually I have both a 993TT (97), which is here in London and a Ranger which is back at the house in Napa. The TT is a daily driver (well, not daily;nobody drives daily in London if they don't have to) and stays parked on the street the same as urban-alchemist and for the same reason.
Cheers, as they say over here!
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Interesting thread. Not sure about how important is the impact on aerodynamics due to their location and direction, it will be worth doing some research... I do love the looks of Leon's 993TT without the gutters, shaving them even seems to be healthy for him! ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
Chris, that is an awesome installation...!
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Chris, that is an awesome installation...!
#40
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Ok, checked with my guru Howard Meister who drove a 935 at Daytona back in the golden area of sports cars, and the gutters on the forward pillar are a 6mph drag on the straights. Thats at around 200mph. So without a wind tunnel eliminating the forward rain gutters is a 3% improvement. So for those cruzin, or 6 speeders thats about a 1.95 mph at 65.
I just as soon put a K&N filter to regain the loss rather than shave my gutters. There are a lot of things that I would perfer to shave, but gutters are not one of them.
Jimmy
I just as soon put a K&N filter to regain the loss rather than shave my gutters. There are a lot of things that I would perfer to shave, but gutters are not one of them.
Jimmy
#42
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That is what I thought the whole time.
I bet you can also gain enough horse power for the 1.95 mph if you have a quick 3 second dyno run resulting in 460 rwhp for a stock tt.
I bet you can also gain enough horse power for the 1.95 mph if you have a quick 3 second dyno run resulting in 460 rwhp for a stock tt.
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I asked Ruf the other day about that while my car was getting serviced and they spoke of the extensive re-welding process that goes into shaving off the entire gutter...probably one of the reasons the Integrated Roll Cage costs 19,000 bucks! it looks amazing in the flesh, but i think if you filled up your a-pillars with the inserts then you're probably better off this late in the game.
I saw those little aero mirrors and was actually thinking- why don't we all just go one step further and only use a mirror on the left side like the old school cars? I had a mercedes with one mirror from 1982 i think. that might free up some drag!
I saw those little aero mirrors and was actually thinking- why don't we all just go one step further and only use a mirror on the left side like the old school cars? I had a mercedes with one mirror from 1982 i think. that might free up some drag!