v8r brake kit + brake bias - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-20-2012, 02:48 PM   #21
Elite Member
 
Join Date: Jul 2005
Location: Anacortes, WA
Posts: 2,476
Total Cats: 114
Default

I scaled images to get a comparison of wilwood single pads for the rear compared to my current 1.6l pads.

total pad area looks similar. The wilwoods will have more sweped surface area on the rotors. which would last longer?

Attached Thumbnails
v8r brake kit + brake bias-untitled.jpg  
bbundy is offline   Reply With Quote
Old 01-21-2012, 12:13 PM   #22
Senior Member
iTrader: (6)
 
Join Date: Jun 2010
Location: San Rafael, CA
Posts: 1,124
Total Cats: 41
Default

The timing of this thread is perfect. I have been sitting on the sidelines waiting for the ideal 4 wheel solution. Great info guys!

Bob why would you choose the 2x1.38 verses the 4x1.00? Todd states the piston volume of each is about the same.
k24madness is offline   Reply With Quote
Old 01-21-2012, 02:54 PM   #23
Elite Member
 
Join Date: Jul 2005
Location: Anacortes, WA
Posts: 2,476
Total Cats: 114
Default

Quote:
Originally Posted by k24madness View Post
The timing of this thread is perfect. I have been sitting on the sidelines waiting for the ideal 4 wheel solution. Great info guys!

Bob why would you choose the 2x1.38 verses the 4x1.00? Todd states the piston volume of each is about the same.
2X 1.38” piston area 1.50”
4X 1” piston area 1.58”
Close enough I think.

Looks like only off the shelf for a 4X1” the option is narrow Dynapro Lug Mount.

I’m kind of thinking on the theory that the behavior of the pad friction material is is non linear with both temperature and operating pressure. Race pads that work awesome with high pressure and high temp offering good feel and pad and rotor wear rates tend to behave much differently if your just tooling around on the street with them with low brake pressures and temp. Even if they do have a flat friction curve it seems to like to grind down the rotors fast with the pads cold and hard and light pressure.

With the same size pads front and rear and the rear operating with a little less than half the piston force to maintain bias the much lower pad to rotor operating pressure seems like it wouldn’t balance the system optimally. Front pads will be working hard rear pads will be on a drive back from the grocery store.

More data

Forged Dynalite 3.4lbs
Dynapro Radial 4.0lbs
Narrow Dynapro lug mount 4.1 lbs
Dynapro Single 2.3 lbs

Dynapro Radial/narrow Pad-----Area 6.36 sqin----Volume 3 cuin
Forged Dynalite Pad------------Area 6.36 sqin----Volume 2.1 cuin
Dynapro Single Pad-------------Area 3 sqin-------Volume 1.1 cuin

Bob
bbundy is offline   Reply With Quote
Old 01-22-2012, 08:06 PM   #24
Senior Member
Thread Starter
iTrader: (22)
 
Join Date: Oct 2007
Location: bay area, ca
Posts: 551
Total Cats: 19
Default

I swapped to the 6.4:1 booster, drilled a hole in the pedal, and moved the booster arm down ~0.5". My rough guess is the pedal ratio is now closer to 3.5:1. It felt a lot better on the street this morning, but I wasn't able to really test it with no sun and low 40s.
orion4096 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 57 07-19-2017 05:11 PM
Noob to Miataturbo from MA JxPhan Meet and Greet 3 10-02-2015 03:17 AM
New M62 Miata owner Pist0n Meet and Greet 4 10-01-2015 09:18 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM


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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:22 PM.