Is my front undertray too long? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 03-20-2008, 09:39 AM   #21
Elite Member
iTrader: (21)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,689
Total Cats: 560
Default

Quote:
Originally Posted by tann3r View Post
I think rleete was refering to Dzus fasteners.
Yes, that's the type of thing I was thinking. But, Dzus is a brand; one among several. I mostly use Southco at work, but they're all pretty much the same.

McMaster-Carr sells them. Can also get them through other places, but I'm not sure if you can find them in the average auto parts store.
rleete is offline   Reply With Quote
Old 03-20-2008, 10:11 AM   #22
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,244
Total Cats: 291
Default

I think it's great. If it becomes a hassle to remove, then change it later. Now get some data and show us it works! btw- I don't think it's a good idea to have your WBO2 sensor point up (past parallel to the ground/chassis)... regardless of who makes it.
m2cupcar is offline   Reply With Quote
Old 02-05-2009, 10:43 AM   #23
Junior Member
 
Join Date: Sep 2008
Posts: 218
Total Cats: 0
Default

Quote:
Originally Posted by rleete View Post
Yes, that's the type of thing I was thinking. But, Dzus is a brand; one among several. I mostly use Southco at work, but they're all pretty much the same.

McMaster-Carr sells them. Can also get them through other places, but I'm not sure if you can find them in the average auto parts store.
What sort of fasteners are these? I have a desk job so I'm not familiar with the terminology.
JimAtFSU is offline   Reply With Quote
Old 02-05-2009, 11:43 AM   #24
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,244
Total Cats: 291
Default

m2cupcar is offline   Reply With Quote
Old 02-05-2009, 11:50 AM   #25
Elite Member
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,791
Total Cats: 130
Default

Very nice, I like it.
pdexta is offline   Reply With Quote
Old 02-05-2009, 01:11 PM   #26
Elite Member
iTrader: (12)
 
Join Date: Apr 2008
Location: Longs, SC
Posts: 2,583
Total Cats: 13
Default

I have a few questions about undertrays.

1. Is plastic really the best material to use? Doesnt it get hot in that area?

2. Is this -only- to to increase the effectiveness of the radiator/cooling system?

3. Does it noticably reduce drag?

4. What is the rear-most part of the undertray connected to?

5. What, if any, are other noticeable effects of the undertray?

Would these work to hold it on if they are fit tight?

http://www.pegasusautoracing.com/pro....asp?RecID=779



BTW sorry to thread-jack.

Last edited by icantthink4155; 02-05-2009 at 01:42 PM.
icantthink4155 is offline   Reply With Quote
Old 02-08-2009, 12:47 AM   #27
Newb
 
Join Date: Jul 2008
Location: CA
Posts: 27
Total Cats: 0
Default

I would like to know and see some data about reduced drag and more efficient cooling as well. Looks like it would be a fun project. Have you guys ever considered putting a triangular shaped piece in front of the front wheels to curve it around them? I read some article about trays and this on a prius and I think I remember something like 33% of the drag in the front is from your front wheels. If you have a splitter does the undertray still help reduce drag?

Found the article here, you guys should check it out. It's definitely a cool read.

Browser Warning

Here are some images from the article that may be helpful...




Last edited by Emberghost; 02-08-2009 at 12:59 AM.
Emberghost is offline   Reply With Quote
Old 07-04-2009, 12:48 AM   #28
Junior Member
iTrader: (3)
 
Join Date: Jun 2008
Location: NJ
Posts: 429
Total Cats: 0
Default

Quote:
Originally Posted by icantthink4155 View Post
1. Is plastic really the best material to use? Doesnt it get hot in that area?
I'm also curious about this... i googled and found this:
ABS Acrylonitrile Butadiene Styrene

Indicates melting point is a little over 200 degrees F which isn't really out of the question is it? especially if the tray ends up in contaact with some hot pipe or something?

Another site says maximum "service temperature" is 185 degrees.. Wikipedia says the heat from a "wood fire" can cause it to boil and light up in a spectacular way

I need to build an undertray soon to, but i'm wondering if there's a different material more suitable. Aside from the sharp edges, what's the downside to aluminum?

-Tomaj
ctxspy is offline   Reply With Quote
Old 07-05-2009, 06:22 PM   #29
Elite Member
Thread Starter
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,052
Total Cats: 8
Default

I've had no problem with my ABS undertray. It doesn't come in contact with any really hot parts but it is close to the downpipe. I haven't noticed any heat damage to the tray though.
Efini~FC3S is offline   Reply With Quote
Old 07-05-2009, 07:46 PM   #30
Junior Member
iTrader: (1)
 
Join Date: Apr 2008
Location: Bristol
Posts: 442
Total Cats: 0
Default

Back on to the subject of the LC-1. I thought that you weren't supposed to mount them below horizontal otherwise moisture would condense and ruin the sensor. Just something to think about if you can rotate that pipe.

Not to mention it would increase the clearance for the awesome undertray. I'm definitely putting this on my list of things to do. I like reddroptop's idea of using aluminium but can I justify the extra weight or more importantly the extra cost!!
Duckie_uk is offline   Reply With Quote
Old 07-06-2009, 03:40 AM   #31
Junior Member
iTrader: (2)
 
Join Date: Feb 2007
Location: Santa Clarita, CA
Posts: 158
Total Cats: 0
Default

isn't the stock undertray abs? I use an abs one I made also and haven't had problems.
Chapman is offline   Reply With Quote
Old 07-07-2009, 07:47 PM   #32
Elite Member
Thread Starter
iTrader: (4)
 
Join Date: Sep 2006
Location: Charlotte, NC
Posts: 3,052
Total Cats: 8
Default

It's not an LC-1. It's a PLX M300. Either way it probably shouldn't be mounted like that, bummer too bad...

Seems to be working fine and I have more pressing issues...
Efini~FC3S is offline   Reply With Quote
Old 07-07-2009, 11:13 PM   #33
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

ABS is commonly used for under the hood applications. In fact I am making my undertray/splitter/ducting out of ABS right now as well. I plan on posting pictures when it is complete.

ABS is also what most factory sport bike body panels are made out of; they see a lot of heat too. Typically there is only a couple of inches between a body panel and the engine and/or exhaust.
ZX-Tex is offline   Reply With Quote
Old 07-07-2009, 11:16 PM   #34
Junior Member
iTrader: (3)
 
Join Date: Jun 2008
Location: NJ
Posts: 429
Total Cats: 0
Default

good to hear.. I'm currently waiting on some silicone for my new intake tract, then comes the cold air box. After that, undertray
ctxspy is offline   Reply With Quote
Old 09-17-2009, 06:02 PM   #35
Elite AbsurdFlow Member
 
Laur3ns's Avatar
 
Join Date: Mar 2008
Location: Enschede, NL
Posts: 2,058
Total Cats: 11
Default

So, how does it perform?
Laur3ns is offline   Reply With Quote
Old 09-17-2009, 07:58 PM   #36
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Quote:
Originally Posted by Spookyfish View Post
So, how does it perform?


I love that smiley

but all the fairing on the sports bikes are made from abs as well. Matter of fact my old Ninja had less than a finger clearance (less than 1/2") between the pipes and the fairing and it never got burned.
triple88a is offline   Reply With Quote
Old 09-17-2009, 10:12 PM   #37
Elite Member
iTrader: (12)
 
Join Date: Apr 2008
Location: Longs, SC
Posts: 2,583
Total Cats: 13
Default

[QUOTE=ZX-Tex;427833I plan on posting pictures when it is complete.
[/QUOTE]

Anything come of that statement?
icantthink4155 is offline   Reply With Quote
Old 09-17-2009, 10:24 PM   #38
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

Yeah sorry been busy dealing with the engine rebuild and the LS1 car. The splitter is in and working great. I have had it over 100 mph and it stayed put. I'll get some pictures up as soon as I can.

I will also be making another one for the LS1 car soon. That one will be track tested, and will be larger as well, with more forward protrusion.
ZX-Tex is offline   Reply With Quote
Old 09-17-2009, 11:13 PM   #39
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

ZX-Tex, are you also planning on having the splitter stick out or will it just line up with the bumper? Also will the bottom part of it be from the same piece or will they be cut separately (like splitter made from 1/4" abs and 1/8" for the undertray)?
triple88a is offline   Reply With Quote
Old 09-18-2009, 12:02 AM   #40
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

Quote:
ZX-Tex, are you also planning on having the splitter stick out or will it just line up with the bumper?
The one I have finished on the street car sticks out about 2" from the bottom of the bumper. It looks good IMO for a street car, not too excessive. The one for the track car will probably stick out an inch more.

Quote:
Also will the bottom part of it be from the same piece or will they be cut separately (like splitter made from 1/4" abs and 1/8" for the undertray)?
It is the same piece all the way back to the front edge of the wheel well. After that, the stock undertray takes over, cut to fit.
ZX-Tex is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 12-15-2017 09:00 PM
Noob to Miataturbo from MA JxPhan Meet and Greet 3 10-02-2015 03:17 AM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM


Thread Tools

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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:18 AM.