Aero work, undertrays and misc looking for opinions
I also have the EVO9 JDM rear bumper on the car which I think has helped a lot with the 148.32 mph trap speeds the car has already reached. There is a huge amount of air that gets trapped under the factory EVO8/9 rear bumpers. The JDM 9 is flush with the spare tire well in the rear.
So let me know what kind of interest there is. I'd like to offer both these but will only do it if there is some interest.
Thank you,
So let me know what kind of interest there is. I'd like to offer both these but will only do it if there is some interest.
Thank you,
Well, it seems like you have a pretty clear answer on the undertray...I was wondering if I could throw another idea at you...Everyone running the JDM 9 rear bumper is in need of a crash beam...I understand that the stock beam can be modified, but it would be nice to have a lightweight tubular piece for those without skills to modify (honestly, how many shops do you think would be willing to take the liability of modifying a crash beam?)...Would you be willing to entertain the idea of creating this type of product?...The only thing that I have seen similar to it is this, by an unknown source:
https://www.evolutionm.net/forums/sh...d.php?t=290278
Crash beams..............extra weight, I take them off and put them in our scrap pile to collect beer money! No way am I interested in building crash beams. There would be more liability in doing that than there would be just removing it for the builder of such a product.
So check it out. I got a call, not sure if the gentleman wants to be revealed or not, yesterday about wind tunnel testing. There is someone here on the forums who owns an EVO himself and works at a wind tunnel. While I am not able to get an EVO over there for testing he was extremely helpful and interesting to talk to. (Thank you for the phone call again!!)
We were talking and he told me it is fairly easy to test the products I am trying to build without a wind tunnel. Just to check to see if the airflow is smooth, turbulent, seperating etc. The trick is quite simple and I never even thought of it. I was told if I simply put some light oil over the surface I wanted to test and then drove the car it would show how the air was flowing. FREAKING GENIUS!
Tonight I got home, put my RS up on the jack and sprayed it down with WD40. I then took it out on the road and drove it easily up to 100 mph where I stayed steady for about a mile. I turned around and came back the same way. I freaking couldn't wait to see if it worked.
I pulled in the garage and jacked the car back up. Sure as **** it worked. I have to give him a call now with a few questions as there are some very interesting things going on.
First thing that is on a positive side, the oil streaked perfectly from the front lip almost all the way to back of the undertray. I don't think I sprayed the rear of the tray very well when I did it, so I can't tell if the air is seperating at that point or if the oil just ran out. I think it just ran out. So the undertray works perfectly, smooth straight streaks from the front to almost the very rear.
Next thing. The "Do luck" ( I keep putting Do Luck in quotes because it is not an actual Do Luck lip, it is a cheaper knock off of that design) seems to work too, atleast in some of the areas. My car is white so the oil was extremely hard/impossible to see on the nose of the car. If there was some dust on the road it sure would have helped. Anyway, on the front lip on the left and right front corners it is flat, almost like a small splitter just on the corners. This areas was perfectly streaked on the top, so you can tell the air is flowing over this flat area, I would guess helping with some downforce from the looks of the top and bottom of the car in that area.
The holes that I plugged on the far left and right of the fascia is hard to tell what is happening there. This area and the wickers I put infront of the tires are both areas I have questions about and will get some answers next week, I hope.
Very promising right now. I figure worste case the wicker I put infront of the tires may have to come off.
Looking good. I can't wait to build the rear section and do some testing there!
We were talking and he told me it is fairly easy to test the products I am trying to build without a wind tunnel. Just to check to see if the airflow is smooth, turbulent, seperating etc. The trick is quite simple and I never even thought of it. I was told if I simply put some light oil over the surface I wanted to test and then drove the car it would show how the air was flowing. FREAKING GENIUS!
Tonight I got home, put my RS up on the jack and sprayed it down with WD40. I then took it out on the road and drove it easily up to 100 mph where I stayed steady for about a mile. I turned around and came back the same way. I freaking couldn't wait to see if it worked.
I pulled in the garage and jacked the car back up. Sure as **** it worked. I have to give him a call now with a few questions as there are some very interesting things going on.
First thing that is on a positive side, the oil streaked perfectly from the front lip almost all the way to back of the undertray. I don't think I sprayed the rear of the tray very well when I did it, so I can't tell if the air is seperating at that point or if the oil just ran out. I think it just ran out. So the undertray works perfectly, smooth straight streaks from the front to almost the very rear.
Next thing. The "Do luck" ( I keep putting Do Luck in quotes because it is not an actual Do Luck lip, it is a cheaper knock off of that design) seems to work too, atleast in some of the areas. My car is white so the oil was extremely hard/impossible to see on the nose of the car. If there was some dust on the road it sure would have helped. Anyway, on the front lip on the left and right front corners it is flat, almost like a small splitter just on the corners. This areas was perfectly streaked on the top, so you can tell the air is flowing over this flat area, I would guess helping with some downforce from the looks of the top and bottom of the car in that area.
The holes that I plugged on the far left and right of the fascia is hard to tell what is happening there. This area and the wickers I put infront of the tires are both areas I have questions about and will get some answers next week, I hope.
Very promising right now. I figure worste case the wicker I put infront of the tires may have to come off.
Looking good. I can't wait to build the rear section and do some testing there!
version2beta, do you have anything better to do with your time? Do luck stuff is over priced and hard to get. How's that?
After you ticked me off with your rediculous question I did a search for the Do luck lip. Seems as though Do Luck went out of business and the real do luck lip is not available anymore. Also, the real Do luck lip, after looking at it is not the same, thank God I got the "knock off". The real one has the provisions to put the stock undertray back on, which I want no part of. The one I bought has a long smooth lip on the bottom and back, very easy for the new undertray to attach to.
After you ticked me off with your rediculous question I did a search for the Do luck lip. Seems as though Do Luck went out of business and the real do luck lip is not available anymore. Also, the real Do luck lip, after looking at it is not the same, thank God I got the "knock off". The real one has the provisions to put the stock undertray back on, which I want no part of. The one I bought has a long smooth lip on the bottom and back, very easy for the new undertray to attach to.
Last edited by David Buschur; Sep 21, 2007 at 07:21 PM.
David,
I can't wait for the finished product. I have your deluxe front mount intercooler and had to cut my stock undertray to make it work as I did not want to be without any protection under the car. I also have the Do luck replica lip and JDM Evo 9 rear bumper. Put me on the list for both front and rear undertray . I'm really excited that your doing this for the Evo community.
Derek
I can't wait for the finished product. I have your deluxe front mount intercooler and had to cut my stock undertray to make it work as I did not want to be without any protection under the car. I also have the Do luck replica lip and JDM Evo 9 rear bumper. Put me on the list for both front and rear undertray . I'm really excited that your doing this for the Evo community.
Derek
Last edited by Derek Baker; Sep 22, 2007 at 06:13 PM.
Send me a link to the 0 lift lip and I will look at it.
The brake ducts should be do-able but it is going to have to be a DIY deal, I can supply the angle I used under the car and you can just cut/affix it to the tray. The stuff is super easy to work with. I was actually thinking about brake ducts this weekend and I think there might be a much better way of doing it..............
The brake ducts should be do-able but it is going to have to be a DIY deal, I can supply the angle I used under the car and you can just cut/affix it to the tray. The stuff is super easy to work with. I was actually thinking about brake ducts this weekend and I think there might be a much better way of doing it..............
