The Great FD3S Under-body Aerodynamics Thread: Photos, Products, Ideas, Results
11-16-09, 07:00 PM
#56
I also have a good article about the relationship of rear diffusers and rear wings. Can't seem to find it. Once I do I will post it.
But here go another source.
http://www.accessscience.com/popup.a...260&name=print
But here go another source.
http://www.accessscience.com/popup.a...260&name=print
11-16-09, 07:59 PM
#57
I also have a good article about the relationship of rear diffusers and rear wings. Can't seem to find it. Once I do I will post it.
But here go another source.
http://www.accessscience.com/popup.a...260&name=print
But here go another source.
http://www.accessscience.com/popup.a...260&name=print
Good post!
Though, I already read most of those articals from racecar engineering, but really good stuff, as they always have!
I too will be making under body aero-effects on my FD in the next year, I hope to be able to get to a wind tunnel as well, as my cousin is one of the head aeronautical engineers for honda and could help me with that one
.-J
11-16-09, 08:25 PM
#58
Holy crap, afgmoto1978 thats a great article! I really do think that there is a benefit to some degree to run a fully paneled underbody. I am really interested to see how Atomic rex's underbody kit turns out. A couple fd owners I have met were running large adjustable front lips at track events with great success, so I would think adding to that with a flat underbody and rear diffuser could really reap some good performance gains.
11-16-09, 09:45 PM
#59
LOL, I knew Adam would hop in on this thread and regulate.
Has the issue of exhausting radiant heat from the engine/ turbos via the transmission tunnel been discussed?
P.S. Adam, when you get access to the wind tunnel, I want to be there to measure modified body (your car) vs stock bodied (my car)
Has the issue of exhausting radiant heat from the engine/ turbos via the transmission tunnel been discussed?
P.S. Adam, when you get access to the wind tunnel, I want to be there to measure modified body (your car) vs stock bodied (my car)
11-17-09, 12:42 AM
#60
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what about cooling the tranny, diff, getting heat from the exhaust out.... there are a number of serious problems to solve when you box in the underbelly... though id love to do it as well
11-17-09, 10:49 AM
#62
we are going to ceramic coat the exhaust right through to the end....but also we are going to be adding ducts to bring air in. This will be done without compromising the ground effect.
We are also running oil coolers for both gearbox and diff.
Also we line the transmission tunnel with an aluminium weave shielding, as previously after an hour of constant running, even without the flat floor, the tunnel was so hot it burnt my leg.
It will be suitable for both race or road cars, as we have built in strengthening sections which are strong enough to jack off.
We are also running oil coolers for both gearbox and diff.
Also we line the transmission tunnel with an aluminium weave shielding, as previously after an hour of constant running, even without the flat floor, the tunnel was so hot it burnt my leg.
It will be suitable for both race or road cars, as we have built in strengthening sections which are strong enough to jack off.
11-17-09, 11:19 AM
#65
Extended periods of the car being stationary at stop lights and stop and go traffic. Which would lend itself to somehow integrating a fan system in the tranny tunnel to help expel trapped heat.
Personally, this should be left to racers and fanatical track day enthusiast.
Personally, this should be left to racers and fanatical track day enthusiast.
11-17-09, 11:20 AM
#67
With the above in mind wing position is pretty critical. Ideally you would integrate it with regard to the rear diffuser air flow, but that would require a wind tunnel or a lot of track testing to accurately pinpoint that location at the desired air velocity (mph). To be safe though you would just put the wing at a high enough position that it has clean air throughout.
Also something to be aware of is the sensitivity of the car to pitch, roll and yaw when you have underbody aero on the car. Rules aside, ride height is pretty critical, especially when pitch and to a lesser extent yaw is involved. Extreme example, LMP & Le mans prototypes flipping, those where caused when the pitch or yaw of the car was high enough to cause the car to be a wing. Or the reverse effect where you lose all underbody downforce when the front splitter touches the ground which stops airflow to the bottom. Note, this would only happen with a splitter that has no step to it or the ride height is low enough and coilovers are at a soft enough setting to induce this condition. Springs and dampers become a key player to optimizing aero.
That is probably a nugatory unfortunately good buddy. Getting access to the Windtunnel in the first place will be a challenge. Hopefully by next year the building shutdown won’t be as tight is it is this year. With that said, weekends are out, so that leaves only a few hours in the evening on a weekday to do it. Not a lot of time. Setup time would be the most time consuming. You’re more than welcome to be present to help though. The plan is to have the car fully equipped with all the aero pieces I will be making for the car and then remove parts one by one to see how it has an overall effect on the car.
11-17-09, 11:28 AM
#68
Adam,
Good post!
Though, I already read most of those articals from racecar engineering, but really good stuff, as they always have!
I too will be making under body aero-effects on my FD in the next year, I hope to be able to get to a wind tunnel as well, as my cousin is one of the head aeronautical engineers for honda and could help me with that one.
-J
Good post!
Though, I already read most of those articals from racecar engineering, but really good stuff, as they always have!
I too will be making under body aero-effects on my FD in the next year, I hope to be able to get to a wind tunnel as well, as my cousin is one of the head aeronautical engineers for honda and could help me with that one
.-J
11-17-09, 12:57 PM
#71
Banned. I got OWNED!!!
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The kit is fully available for sale now
Do you want to give me a call, or email me regarding this?
11-17-09, 02:34 PM
#73
That is probably a nugatory unfortunately good buddy. Getting access to the Windtunnel in the first place will be a challenge. Hopefully by next year the building shutdown won’t be as tight is it is this year. With that said, weekends are out, so that leaves only a few hours in the evening on a weekday to do it. Not a lot of time. Setup time would be the most time consuming. You’re more than welcome to be present to help though. The plan is to have the car fully equipped with all the aero pieces I will be making for the car and then remove parts one by one to see how it has an overall effect on the car.
let me know when you need me.
11-17-09, 06:39 PM
#74
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we are going to ceramic coat the exhaust right through to the end....but also we are going to be adding ducts to bring air in. This will be done without compromising the ground effect.
We are also running oil coolers for both gearbox and diff.
Also we line the transmission tunnel with an aluminium weave shielding, as previously after an hour of constant running, even without the flat floor, the tunnel was so hot it burnt my leg.
It will be suitable for both race or road cars, as we have built in strengthening sections which are strong enough to jack off.
We are also running oil coolers for both gearbox and diff.
Also we line the transmission tunnel with an aluminium weave shielding, as previously after an hour of constant running, even without the flat floor, the tunnel was so hot it burnt my leg.
It will be suitable for both race or road cars, as we have built in strengthening sections which are strong enough to jack off.
-A flat underbody (with some amount of rake, and vents)
-2 pumps/lines/coolers for diff and tranny
-Tranny tunnel heat shroud
-And a new exhaust system that exists the rear which is ceramic coated to cut down on radiant heat
I'm interested to know more
cause i've been wanting something like this for years