Anyone have a wind tunnel they wana donate to R3V for the day? I would really like to see a STOCK 325is and a M3 in a wind tunnel to see the differences in drag.. I bet we would all be pretty surprised.
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E30 Aerodynamics
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Originally posted by LJ851kingston is the play by play announcer for this thread.
Originally posted by unloadedak#teamross
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Originally posted by Nesset View PostAnyone have a wind tunnel they wana donate to R3V for the day? I would really like to see a STOCK 325is and a M3 in a wind tunnel to see the differences in drag.. I bet we would all be pretty surprised.
I really wanna see what huge rear wings do to the drag and high end acceleration on our cars. There'd be more drag obviously but I don't think the effect would be near as drastic as any new car with their smoothly sloped rears.
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Originally posted by Jeff2886 View PostFor those of you who are interested, I'm about 3/4 of the way through this book and I think it would make a great addition to any gearhead library.
It goes through a number of different items (spoilers, wings, diffusers, air dams, etc.) and explains it in pretty simple terms. It was hard to keep reading the book and not just run to the garage and start working on the E30.
Anyways - check it out. It's worth a look.
Competition Aerodynamics: A Practical Handbook
http://www.amazon.com/Competition-Ca.../dp/0857330071
Originally posted by kingston View PostI am interested in the rear aero stuff around the spare tire well and rear bumper. I want to fab something like that for my track car.75' M42 Powered 2002
AW 318is
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Originally posted by whitebulat22 View PostIf not one of these I think just a controlled experiment on a runway or a track straight that can be used repeatedly; such as a pull beginning at 80-90 mph at a defined start and end point, would give us plenty of info to do meaningful (just not exact) calculations with. Beyond M3 vs Mtech2 aeros, this would verify benefits of simple underbody additions. A simple flattened underbody would be able to address very many airflow disruptions.
I really wanna see what huge rear wings do to the drag and high end acceleration on our cars. There'd be more drag obviously but I don't think the effect would be near as drastic as any new car with their smoothly sloped rears.
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I just got into this E30 and am AX'g it while I sort things out and get my comp license. Interestingly, it came with a large CF GT wing (69 in. wide) that the previous owner used in NASA GTS. It was too wide and mounted too far back for SCCA so I pulled it off the car during my first AX day. After adding the wing back on for the next AX, (narrowed to 61 in. and moved forward 3 in.) I noticed my brake bias was thrown off (locking fronts) after adjusting it to the no-wing position. This was only noticeable at the end of sections with 50-60 mph speeds. Just throwing out that data point...
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Originally posted by kingston View Post
I am interested in the rear aero stuff around the spare tire well and rear bumper. I want to fab something like that for my track car.
I need to get a better pic of it later... just snapped this one real quick
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Originally posted by ncrmtrsprtsE30 View PostI cut out my spare tire well and made a custom diffuser out of alumalite that goes from the diff to the back roll panel and from shock to shock, sealing up the whole bottom.
[img]http://i.imgur.com/UxDwwqwl.jpg[img]
I need to get a better pic of it later... just snapped this one real quick
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