Aidan's SCCA Stock Class Autocross Build (Road Course is Too Scary) - Page 169 - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Build Threads Building a motor? Post the progress here.

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 08-29-2015, 05:54 PM   #3361
SadFab CEO
iTrader: (3)
 
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 3,322
Total Cats: 401
Default Community build thread...Aidan rambles on and on...

Or even just rtv
hi_im_sean is online now   Reply With Quote
Old 08-29-2015, 05:55 PM   #3362
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>Or even just hold the nut there....</p><p>How much thickness do we need between the nut and the spindle. Whats the engineering math behind that.</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:00 PM   #3363
Elite Member
iTrader: (19)
 
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,187
Total Cats: 325
Default

You're gonna strip the nut long before you have enough force to pull it through.
rleete is offline   Reply With Quote
Old 08-29-2015, 06:01 PM   #3364
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>Why?</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:01 PM   #3365
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>Will the cutouts increase the CNC price?</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:01 PM   #3366
Sadfab Union President
iTrader: (2)
 
Join Date: May 2014
Location: Kansas
Posts: 2,687
Total Cats: 113
Default

Because it's gotta pull 5/8 square steel through .200" aluminum.

Nuts let me use 3/4 material, cheaper material, less milling total.
deezums is offline   Reply With Quote
Old 08-29-2015, 06:02 PM   #3367
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>How do you math that?</p><p>Shear strength? Something else?</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:03 PM   #3368
SadFab CEO
iTrader: (3)
 
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 3,322
Total Cats: 401
Default Community build thread...Aidan rambles on and on...

My concern wouldnt be the nut pulling through the aluminum, but the bracket pulling away from the counter sunk area. Needs good radii.
hi_im_sean is online now   Reply With Quote
Old 08-29-2015, 06:04 PM   #3369
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>So like the nut moving around?</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:05 PM   #3370
Sadfab Union President
iTrader: (2)
 
Join Date: May 2014
Location: Kansas
Posts: 2,687
Total Cats: 113
Default

Are you talking folding the entire caliper mounting ear off the thicker side of the bracket?

Also, the reason I don't want to stake the nuts in is because I don't plan on completely countersinking the caliper mounting nut, so there won't be material to stake it down there. The nut is proud from the bracket there, the reason rtele made them from 1" is because he wanted an extra .100" or so of aluminum thread, I'll leave the nut slightly proud, any more and it would be in the rotor, that just leaves extra strength in the ears.

Also, the rotors I ordered measure around 21.8mm. I got my BP10 pads today and there is clearance, although only 1.5mm or so as Relte found, no drag though slips over just fine. Score!
deezums is offline   Reply With Quote
Old 08-29-2015, 06:07 PM   #3371
Senior Member
iTrader: (8)
 
Join Date: Oct 2006
Location: Lexington SC
Posts: 961
Total Cats: 12
Default

Quote:
Originally Posted by hi_im_sean View Post
I typed a whole paragraph to him specifically in our emails. He read none of it.
Thanks! I can really feel the love!

I made some steel inserts for my first set of brackets that I made out of 3/8 coupling nuts. They worked, but only held 5ft/lb more torque before stripping compared to at least 3/8 deep tapped aluminum, during testing I did.
Rallas is offline   Reply With Quote
Old 08-29-2015, 06:10 PM   #3372
Sadfab Union President
iTrader: (2)
 
Join Date: May 2014
Location: Kansas
Posts: 2,687
Total Cats: 113
Default

Were you by chance using coated hardware?

I guess worse comes to worse, you could use bolts or nuts as I imagine a bolt with flange nut would hold better. Either one will be better than aluminum though, at the cost of complexity that doesn't bother me much with CNC.
deezums is offline   Reply With Quote
Old 08-29-2015, 06:22 PM   #3373
Senior Member
iTrader: (8)
 
Join Date: Oct 2006
Location: Lexington SC
Posts: 961
Total Cats: 12
Default

Quote:
Originally Posted by hi_im_sean View Post
I would prefer a full depth flanged insert with a flat, but those are much harder to find.

This is close to what my steel inserts looked like. Willwood uses a similar looking insert on their brackets. I have the part number for it somewhere.

I would be more worried about those square nuts stripping than pulling through. Also you are significantly reducing the material left on each mounting ear. The reduced crossectional area will significantly weaken the bracket. The threaded aluminum is just fine ad long as it is >3\8 thick. Thinner than this and you will strip it with 30ft/lb of torque on a 3/8-16 bolt. This is really only a concern on the caliper mounting ear since you are limited by Tha space between the rotor and the mounting face of the caliper ears. The part that attaches to the spindle allows almost a full inch deal holes. I needed over 60 ft/lb to strip those guys.

I did these stripping tests by tapping different depth holes in different materials. I even tried manual vs. machine tapping. I would then install a washer stack and bolt and use a digital torque meter to capture the peak torque before each bolt started stripping. Was pretty interesting. I need to dig up my results.

Did I ever post a link for the threadserts?
Rallas is offline   Reply With Quote
Old 08-29-2015, 06:26 PM   #3374
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>You talked about them. Not sure if I remember a link.</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:27 PM   #3375
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>found em</p><p>http://www.miataturbo.net/build-thre...0/#post1258452</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:28 PM   #3376
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>You're link is broken though</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:28 PM   #3377
Sadfab Union President
iTrader: (2)
 
Join Date: May 2014
Location: Kansas
Posts: 2,687
Total Cats: 113
Default

Again, I am not fully recessing the bolt/nut on the caliper mounting ear. I'm gonna use 3/4 material, then leave the nut proud from the bracket, as far as I can before it starts hitting the rotor. I am removing approximately .100" from the entire bracket (moving to 3/4 and won't need to mill thickness) then recessing the nut 1/8". The caliper ears are .33", and the nut pocket is far enough out to not detract from the overall thickness where they meet. That's about enough aluminum for threads, right?

Threadserts, positive locking helicoils, right? I don't remember a link, but those things are spendy for the installing hardware, no?
deezums is offline   Reply With Quote
Old 08-29-2015, 06:30 PM   #3378
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>Key locking?</p><p>McMaster-Carr</p>
aidandj is offline   Reply With Quote
Old 08-29-2015, 06:33 PM   #3379
Sadfab Union President
iTrader: (2)
 
Join Date: May 2014
Location: Kansas
Posts: 2,687
Total Cats: 113
Default

******* hell, those are spendy. I'll make brackets of stainless before using those.
deezums is offline   Reply With Quote
Old 08-29-2015, 06:34 PM   #3380
SadFab Sales Lady
Thread Starter
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,842
Total Cats: 936
Default

<p>5 bucks each?</p>
aidandj is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Autocross Class Unknown - An exercise in not caring ChasB Race Prep 31 10-26-2016 09:22 PM
Autocross/time attack build up drivehardaz General Miata Chat 11 07-21-2006 02:39 PM
Red Beast might be for sale... rmcelwee Cars for sale/trade 5 07-17-2006 04:38 AM
(not my Miata) Water in my CAI. And I/C piping. And I/C. And, finally, engine. UofACATS Insert BS here 4 07-11-2006 11:37 PM


Tags
aidan and sean's thread, brake fade? used pads., camera thread, can't catch meeeeee, dirt is my friend, hairline thread, landlord fuckery, linus strikes again, remarkable power!!!!!!!, sadfab rocks your butt, tires suck buy frozen rs3

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 01:44 AM.