Post your DIY aero pics - Page 39 - 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 11-08-2014, 11:27 PM   #761
Newb
 
Join Date: Dec 2013
Posts: 31
Total Cats: 0
Default

Also just wanted to put out a big THANKS to the folk on this thread. Been lurking for a while, and learned a lot.

I've autocrossed a friend's Subaru off-and-on over the years, and was blown away by how much it mattered when did some fairly extensive aero. He ran in X-Prepared, which has allowances for something like 8sqft of wing and a huge splitter that extends 6" ahead of the bumper and goes back to the centerline of the front wheels. The biggest difference was in braking.

I wasn't sure what difference it would make to my CSP Miata, which has relatively small allowances for splitters and only allows a spoiler. The spoiler can be 10" off the bodywork, so still pretty large. But the splitter has to be behind the leading edge of the bumper and can only go back to the front of the wheel opening, which results in a pretty small splitter on a Miata. We put together an alumalite front splitter and a durabond rear spoiler on the car a couple months ago, just at the end of the season, and it made a noticeable difference, even at autocross speeds.

Neal
SUV-ETR is offline   Reply With Quote
Old 11-10-2014, 11:43 AM   #762
Newb
 
Join Date: Oct 2012
Posts: 20
Total Cats: 1
Default

Here is my EP bumper. Just the same as everyone else. I haven't made any ducting to the radiator yet because I was limited on time. But I did pick up 5 mph on the straight away at NCM motorsports park with the air dam and under tray. I also made a spoiler like the blackbird one and added a gourny flap but I really don't think it does anything. I have a COT wing also, Im just waiting on my buddy to find time to make the stands.

Dollars spent: 50ish
Hours spent: 2
How effective: 3
0=slower, 1, no improvement, 2 =slightly better,3= big improvement
Materials used: 1/8th inch abs and 1/4 inch HDPE
Bracket location: right beside the tow hooks
Tracks tested on: NCM motorsports park
Race/TT class built for: PTE

Codersozer is offline   Reply With Quote
Old 11-23-2014, 06:00 PM   #763
Supporting Vendor
iTrader: (3)
 
Join Date: Jul 2006
Location: San Diego
Posts: 2,568
Total Cats: 226
Default

Finished up the new front aero setup just in time for GTA SLB Finale.

Old:



New:



A few things to add/improve still that I didn't get around to before the event, but performance was excellent even as-is:

Attached Thumbnails
Post your DIY aero pics-beforefallpic3_zpse8cba211.jpg   Post your DIY aero pics-newfrontaero3_zps0c9ea359.jpg  

Last edited by ThePass; 11-23-2014 at 06:12 PM.
ThePass is offline   Reply With Quote
Old 11-24-2014, 04:58 AM   #764
Junior Member
 
Join Date: Aug 2009
Location: melbourne aus
Posts: 425
Total Cats: 36
Default

Your car looks very purposeful. Nice work.
I made a front spoiler buck. Just need to sand and polish it, then take a mould. This design is intended for a street/track car. So doesn't hang down or out too far.
Will upload some better pics when it's done.
I used 20mm foam, and plaster. Then hi fill primer, and black paint.
I will make a carbon fibre spoiler from the mould. This will only fit NB8B 2001-2005. Hopefully have the first spoiler done in the next week.

Also, I made some panels up to block the sides of the radiator opening, reducing the size substantially. Alloy sheet was used. Pics up when it's all done.


photo upload
lightyear is offline   Reply With Quote
Old 01-03-2015, 05:27 PM   #765
Junior Member
 
Join Date: Aug 2009
Location: melbourne aus
Posts: 425
Total Cats: 36
Default

Forgot to upload the finished pics. Will be testing it on a high speed track at the end of the month.






windows 7 screenshot
lightyear is offline   Reply With Quote
Old 01-03-2015, 05:51 PM   #766
Junior Member
 
Join Date: Dec 2012
Location: Charlotte, NC
Posts: 227
Total Cats: 14
Default

That came out great! Wish I had one for my RX7, very similar look to a number of the European hill climb cars.
Supe is offline   Reply With Quote
Old 01-04-2015, 11:05 AM   #767
Senior Member
iTrader: (1)
 
Join Date: Dec 2008
Location: Manassas, Virginia
Posts: 1,243
Total Cats: 53
Default

Ryan, your car has always looked impressive from an engineering perspective and now the paint looks as good as the aero. Nice job. Is the rear still the same what you showed us last?
mx5autoxer is offline   Reply With Quote
Old 01-04-2015, 02:52 PM   #768
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,535
Total Cats: 838
Default

Quote:
Originally Posted by lightyear View Post
Forgot to upload the finished pics. Will be testing it on a high speed track at the end of the month.
What form of bracing to you plan to implement to support the aero loads?
emilio700 is offline   Reply With Quote
Old 01-04-2015, 05:02 PM   #769
Junior Member
 
Join Date: Aug 2009
Location: melbourne aus
Posts: 425
Total Cats: 36
Default

Most likely make a support behind the bumper to the Oem hole where the inner liner and bumper bolt together with the plastic screw. But use a metal bolt and captive nut. And bolt on a small removable alloy strap under the front edge on each side that will wrap around to the top side with a cable attached onto the tow points to support the leading edge.
I have had it to about 70mph as is, with only the Oem plastic screws holding it on.
lightyear is offline   Reply With Quote
Old 01-05-2015, 12:15 PM   #770
Supporting Vendor
iTrader: (3)
 
Join Date: Jul 2006
Location: San Diego
Posts: 2,568
Total Cats: 226
Default

Whether it survives at speed without falling off is a different thing entirely than how much downforce is being lost in flex.

Quote:
Originally Posted by mx5autoxer View Post
Ryan, your car has always looked impressive from an engineering perspective and now the paint looks as good as the aero. Nice job. Is the rear still the same what you showed us last?
Thank you sir! The pic in my sig shows the rear aero as it is to date; something like v3 or 4 of this diffuser. I've been working on an all new diffuser in my head for a little while now, and that will likely happen during this year, but there are some other big plans that will come first.

-Ryan
ThePass is offline   Reply With Quote
Old 01-05-2015, 12:29 PM   #771
Supporting Vendor
iTrader: (1)
 
OGRacing's Avatar
 
Join Date: May 2014
Posts: 1,570
Total Cats: 72
Default

i'm shocked by the rolls of plastic that summit sells. they all color match oem miata colors...
OGRacing is offline   Reply With Quote
Old 01-05-2015, 01:41 PM   #772
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,535
Total Cats: 838
Default

Quote:
Originally Posted by lightyear View Post
Most likely make a support behind the bumper to the Oem hole where the inner liner and bumper bolt together with the plastic screw. But use a metal bolt and captive nut. And bolt on a small removable alloy strap under the front edge on each side that will wrap around to the top side with a cable attached onto the tow points to support the leading edge.
I have had it to about 70mph as is, with only the Oem plastic screws holding it on.
Based on my experience, that air dam/splitter will generate maybe 150-200lbs total load at 100mph. Enough to flex the plastic nose letting the air dam drag the ground. It's hard to image any cantilevered structure under the dame supporting it better than cables to the radiator core or bumper support.
emilio700 is offline   Reply With Quote
Old 01-05-2015, 06:38 PM   #773
Supporting Vendor
Thread Starter
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 4,535
Total Cats: 838
Default

Quote:
Originally Posted by OGRacing View Post
i'm shocked by the rolls of plastic that summit sells. they all color match oem miata colors...
And 949 Racing orange

Allstar Performance purchased via Amazon. 4x8' x .100, $56 shipped. Amazon.com: Allstar Performance 22465 4X8 PLASTIC ORANGE: Automotive

Note the self clearancing and crack resistance where it got whacked. HDPE is the ideal material for this.

emilio700 is offline   Reply With Quote
Old 01-05-2015, 07:44 PM   #774
Supporting Vendor
iTrader: (1)
 
OGRacing's Avatar
 
Join Date: May 2014
Posts: 1,570
Total Cats: 72
Default



it matches my hexis matte red vinyl.. crazy
OGRacing is offline   Reply With Quote
Old 01-05-2015, 11:06 PM   #775
Supporting Vendor
iTrader: (3)
 
Join Date: Jul 2006
Location: San Diego
Posts: 2,568
Total Cats: 226
Default

^ First set of our NC hood louvers in the wild... and they're on an NB

-Ryan
ThePass is offline   Reply With Quote
Old 01-06-2015, 09:25 PM   #776
Senior Member
iTrader: (2)
 
Join Date: Dec 2008
Location: KY
Posts: 617
Total Cats: 33
Default

Quote:
Originally Posted by ThePass View Post
Whether it survives at speed without falling off is a different thing entirely than how much downforce is being lost in flex.
I regularly see this comment pop up in aerodynamic discussions and have always kept my mouth shut, but I like this place too much.

The idea that dowforce is lost due to trunk lids or bumpers or other parts flexing is just an old forum wives' tale. Think about trying to compress a spring with your hands. If you push the spring with your right hand, then your left hand has to push back with the same force to compress the spring. Your left hand does not see less force because the spring is compressing. You're putting potential energy into the spring as you compress it, but energy and force are two separate things.

The same goes for body parts flexing under aero loads. If an aerodynamic device is creating a downward force, then 100% of that force is eventually going to end up at the tires. The downforce doesn't just disappear into space when one of the pieces in the middle flexes.

The only way flex comes into play is when it starts changing the shapes of parts and the angle at which air is hitting those parts. However, as Formula 1 has shown recently, that flex can help you just as much as it can hurt you. Without testing, it's just another unknown.

Last edited by jpreston; 01-06-2015 at 09:43 PM.
jpreston is online now   Reply With Quote
Old 01-06-2015, 11:00 PM   #777
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,968
Total Cats: 50
Default

Quote:
Originally Posted by jpreston View Post
I regularly see this comment pop up in aerodynamic discussions and have always kept my mouth shut, but I like this place too much.

The idea that dowforce is lost due to trunk lids or bumpers or other parts flexing is just an old forum wives' tale. Think about trying to compress a spring with your hands. If you push the spring with your right hand, then your left hand has to push back with the same force to compress the spring. Your left hand does not see less force because the spring is compressing. You're putting potential energy into the spring as you compress it, but energy and force are two separate things.

The same goes for body parts flexing under aero loads. If an aerodynamic device is creating a downward force, then 100% of that force is eventually going to end up at the tires. The downforce doesn't just disappear into space when one of the pieces in the middle flexes.

The only way flex comes into play is when it starts changing the shapes of parts and the angle at which air is hitting those parts. However, as Formula 1 has shown recently, that flex can help you just as much as it can hurt you. Without testing, it's just another unknown.
Thanks for posting. I have always wondered about this, especially after the RB brouhaha from a few years back (and to some extent Williams this year).
Seefo is offline   Reply With Quote
Old 01-07-2015, 12:09 AM   #778
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,796
Total Cats: 931
Default

Quote:
Originally Posted by jpreston View Post
I regularly see this comment pop up in aerodynamic discussions and have always kept my mouth shut, but I like this place too much.

The idea that dowforce is lost due to trunk lids or bumpers or other parts flexing is just an old forum wives' tale. Think about trying to compress a spring with your hands. If you push the spring with your right hand, then your left hand has to push back with the same force to compress the spring. Your left hand does not see less force because the spring is compressing. You're putting potential energy into the spring as you compress it, but energy and force are two separate things.

The same goes for body parts flexing under aero loads. If an aerodynamic device is creating a downward force, then 100% of that force is eventually going to end up at the tires. The downforce doesn't just disappear into space when one of the pieces in the middle flexes.

The only way flex comes into play is when it starts changing the shapes of parts and the angle at which air is hitting those parts. However, as Formula 1 has shown recently, that flex can help you just as much as it can hurt you. Without testing, it's just another unknown.
What about flexing transferring the direction of the load? Is that possible?
aidandj is offline   Reply With Quote
Old 01-07-2015, 12:20 AM   #779
Elite Member
iTrader: (1)
 
Leafy's Avatar
 
Join Date: Jun 2012
Location: woosta, ma
Posts: 8,598
Total Cats: 91
Default

Quote:
Originally Posted by aidandj View Post
What about flexing transferring the direction of the load? Is that possible?
Nope. If your wing mounts bolted to the roll bar and your wing was behind the bumper it acts on the car the same as if its bolted to the bumper. What the flexing can do is change the angle of attack or shape of your aero component. So when the air pulls down and on that bumper cover and stretches it out its moving the cow catcher in relation to the ground, and that could change the downforce.
Leafy is offline   Reply With Quote
Old 01-07-2015, 12:26 AM   #780
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,796
Total Cats: 931
Default

Quote:
Originally Posted by Leafy View Post
Nope. If your wing mounts bolted to the roll bar and your wing was behind the bumper it acts on the car the same as if its bolted to the bumper. What the flexing can do is change the angle of attack or shape of your aero component. So when the air pulls down and on that bumper cover and stretches it out its moving the cow catcher in relation to the ground, and that could change the downforce.
Makes sense
aidandj 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 12:03 PM.