Post your DIY aero pics - Page 2 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat. 949 Racing - Rim & tires

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 03-09-2012, 12:12 AM   #21
Junior Member
iTrader: (2)
 
Join Date: Apr 2010
Location: Indianapolis, IN
Posts: 79
Total Cats: 1
Default

Quote:
Originally Posted by dgmorr View Post
How much does the angle of the splitter affect the performance? Is it better to have the nose slightly lower or is it better to keep it level with the ground?
Level with the ground.
Shahab is offline   Reply With Quote
Old 03-09-2012, 09:47 AM   #22
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,968
Total Cats: 50
Default

Quote:
Originally Posted by Shahab View Post
It's hard to compare the aero of an F1 car to that of a diy miata setup. Totally different ball game. But to answer you question I'm talking about a different type of deflection.

The goal with the front wing deflection on the red bull was to get the front wing element closer to the ground which would produce more downforce. The mounting of the wing however was not designed to deflect. If it was, then the downforce produced would be wasted and not translated into increased vertical load on the tires.

This article actually explains it quite well.

http://scarbsf1.wordpress.com/2010/0...ls-front-wing/

So yes, deflection of the actual aerodynamic device can be used to your advantage, but if your goal is more vertical load on the tires, then the force it's generating has to be translated to the wheels effectively.

If your splitter makes actual downforce and that downforce is only used to bend your bumper, then it's really not helping you at all is it?
I see, I figured it was something more specific than deflection in general. Thanks for the explanation.
Seefo is offline   Reply With Quote
Old 03-09-2012, 10:18 PM   #23
Senior Member
iTrader: (1)
 
Join Date: May 2008
Location: south texas
Posts: 1,419
Total Cats: 9
Default

Must be level with the ground. Unless you want tons of drag along with your downforce. Also messes up the other benefits of a splitter if its not level.
spoolin2bars is offline   Reply With Quote
Old 03-11-2012, 04:45 PM   #24
Elite AbsurdFlow Member
 
Laur3ns's Avatar
 
Join Date: Mar 2008
Location: Enschede, NL
Posts: 2,057
Total Cats: 11
Default

Dollars spent: < $100
Hours spent: 4-8
How effective: betwee 2=slightly better and 3=big improvement (too little testing)
Materials used: Poplar multiplex
Size/thickness of materials: 11mm (~ .43")
Bracket location: Rear of subframe (2), droplinks from crashbar (2), steering rack (1)
Tracks tested on: Assen, NL (-1s)

Last year I had just the GTC-200 and the rear became very stable (compared to no aero). With the wing slight understeer.

Now with the splitter, car turns in sharply and the rear is more loose. Needs more testing with more AOA in the rear.
Attached Thumbnails
Post your DIY aero pics-imag0557.jpg   Post your DIY aero pics-imag0556.jpg  
Laur3ns is offline   Reply With Quote
Old 03-12-2012, 09:10 PM   #25
Junior Member
 
Join Date: Jun 2011
Location: Houston
Posts: 409
Total Cats: 15
Default

Hey Emilio. I was just talking to you earlier about my wing (and how badly my lack of a hardtop will effect it). Thanks again for all the advice. This is why I need it so badly:

Dollars spent: $100
Hours spent: 15
How effective: I hesitate to say without real testing data, but enough to seriously unbalance the car. I spun at every event I've been at since putting it on. I'm finally getting my head out of my a$$ as putting a wing on to balance it out.
Materials used: Birch ply for the splitter. ABS plastic for the air dam.
Size/thickness of materials: 1/2" ply splitter (thicker than it needs to be, will use thinner material in the future), 1/4" abs airdam
Bracket location: 2 bolts @ back of subframe. 2 turnbuckles on the sides (in front of each wheel, just inside the air dam), 2 turnbuckles in front.
Tracks tested on: Jefferson Circuit @ Summit Point, Weatherly Hill Climb, Various autox's
Race/TT class built for: SCCA SSM Time Trails and Hill Climbs.


Last edited by Handy Man; 03-12-2012 at 09:23 PM.
Handy Man is offline   Reply With Quote
Old 03-12-2012, 09:41 PM   #26
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,534
Total Cats: 838
Default

Quote:
Originally Posted by Handy Man View Post
Hey Emilio. I was just talking to you earlier about my wing (and how badly my lack of a hardtop will effect it). Thanks again for all the advice. This is why I need it so badly:
A quick and dirty band-aid aero is a sheet of coroplast hose clamped between the roof and roll bar hoop. We tested it on a chump car in it had a bit more top end speed and back end was less loose. Also keeps the sun off you if nothing else. Maybe William or Sonny have a pic they can post.
emilio700 is offline   Reply With Quote
Old 03-13-2012, 09:04 AM   #27
Junior Member
 
Join Date: Jun 2011
Location: Houston
Posts: 409
Total Cats: 15
Default

Cool idea. Sadly, it wouldn't be legal for SSM. It turns out the Chaser top isn't legal either :/
Handy Man is offline   Reply With Quote
Old 03-13-2012, 10:31 PM   #28
Junior Member
 
Join Date: Aug 2008
Location: Los Angeles, CA
Posts: 76
Total Cats: 0
Default

Quote:
Originally Posted by emilio700 View Post
A quick and dirty band-aid aero is a sheet of coroplast hose clamped between the roof and roll bar hoop. We tested it on a chump car in it had a bit more top end speed and back end was less loose. Also keeps the sun off you if nothing else. Maybe William or Sonny have a pic they can post.
Here's the top in question.

Attached Thumbnails
Post your DIY aero pics-321163_10100705377564513_1227041_61131692_248288522_a.jpg  
VagaXt is offline   Reply With Quote
Old 03-14-2012, 06:27 PM   #29
Senior Member
iTrader: (4)
 
Join Date: Nov 2009
Location: Toronto, ON
Posts: 1,479
Total Cats: 6
Default

For the guys with plywood splitters, do you do anything to it to help make them more water resistant? How would this hold up on a rain day?
dgmorr is offline   Reply With Quote
Old 03-14-2012, 07:00 PM   #30
Elite AbsurdFlow Member
 
Laur3ns's Avatar
 
Join Date: Mar 2008
Location: Enschede, NL
Posts: 2,057
Total Cats: 11
Default

Quote:
Originally Posted by dgmorr View Post
For the guys with plywood splitters, do you do anything to it to help make them more water resistant? How would this hold up on a rain day?
heat, tar, oil resistant spray paint. Other than that I expect water to be the least of my worries.
Laur3ns is offline   Reply With Quote
Old 03-14-2012, 07:22 PM   #31
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 25
Default

I paint the top side with cheap solid black wood stain. I do not bother staining the bottom most of the time since there is a good chance it will be scraped off anyway. I've had my 3/8" birch plywood splitter at one really wet event and a couple of other damp events. So far, no problems. FWIW I do not leave it out in the rain. Mostly it is in the garage between races.

Spraying it with a water sealer like Thompson's might be worthwhile.
ZX-Tex is offline   Reply With Quote
Old 03-14-2012, 07:38 PM   #32
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 13,362
Total Cats: 809
Default

Mine has been soaked in rain more times than I can count and there are no significantly ill effects. It is covered in ~$3 worth of spraypaint.
Savington is offline   Reply With Quote
Old 03-14-2012, 10:47 PM   #33
Junior Member
iTrader: (1)
 
Join Date: Apr 2010
Location: On, Canada
Posts: 81
Total Cats: 1
Default

I daily drive my splitter and i coated both sides with fiberglass resin then some black paint and other than some bottoming out on the street it has held up fine all last summer. see location im local to you so same weather.

Kris.
uavjeep is offline   Reply With Quote
Old 03-16-2012, 09:22 PM   #34
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,534
Total Cats: 838
Default APR 2D wing mounts

APR Performance 2D wing. We made our own mounts. Not pretty but, functional.

emilio700 is offline   Reply With Quote
Old 03-17-2012, 10:30 AM   #35
Junior Member
 
Join Date: Feb 2012
Location: Quebec city, Canada
Posts: 109
Total Cats: 1
Default

Very interesting video, very well explained!
Thanks!
bigben is offline   Reply With Quote
Old 03-18-2012, 12:07 AM   #36
Junior Member
iTrader: (3)
 
Join Date: May 2010
Posts: 280
Total Cats: -4
Default

Awesome video!
imput1234 is offline   Reply With Quote
Old 03-20-2012, 10:11 PM   #37
Junior Member
iTrader: (6)
 
Join Date: Feb 2011
Posts: 389
Total Cats: 5
Default

i just want to add that my mpg went up about 2-3 mpg with my undertray from page one. testing was accurate as its gonna get.
Twibs415 is offline   Reply With Quote
Old 03-20-2012, 10:17 PM   #38
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,534
Total Cats: 838
Default

Quote:
Originally Posted by Twibs415 View Post
i just want to add that my mpg went up about 2-3 mpg with my undertray from page one. testing was accurate as its gonna get.
We have seen the same thing on other cars. Front under tray is far more effective that most people my guess.
emilio700 is offline   Reply With Quote
Old 03-30-2012, 02:43 AM   #39
Newb
 
Join Date: Dec 2009
Posts: 16
Total Cats: 0
Default

Is there a recommended height off of the ground a splitter should be?
NC Eunos is offline   Reply With Quote
Old 03-30-2012, 02:52 AM   #40
Junior Member
iTrader: (6)
 
Join Date: Feb 2011
Posts: 389
Total Cats: 5
Default

doubt it

lower is better as less air can flow under the car. there is an optimal distance off the front of the car though.
Twibs415 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
In need of base map for stock 1997 brandonbkd MEGAsquirt 0 09-29-2015 12:52 AM


Tags
aero, diy, splitter, spoiler, wing

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 12:17 PM.