Notices

Front Brembo BBK - What to do with the Rears?

Old 08-14-2015, 10:41 AM
  #1  
Registered
Thread Starter
 
Join Date: Nov 2014
Location: Kent, United Kingdom
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Front Brembo BBK - What to do with the Rears?

Hi Guys,


I'm planning to fit a Brembo 4 pot BBK to the front of my RX8. It is the version with the 328mm floating drilled rotors.


My rears are currently standard. What do people recommend to do in order to keep the brake bias the same as stock?


My thinking is to keep the rear calipers standard but get the rotors upgraded. Is there a company out there that does floating drilled rear discs for the RX8 at all in standard rear disc size? I've searched Google but couldn't find any at all. Most are drilled and grooved which don't really match the front brembo rotors... Or do I just leave them completely standard and just upgrade the pads?


Would appreciate people's opinions on this. Thanks for all replies.
J2daG1990 is offline  
Old 08-14-2015, 10:56 AM
  #2  
Registered
iTrader: (46)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,740
Received 338 Likes on 273 Posts
I have standard calipers in the rear with two piece Racing Brake rotors in the rear and RB pads. But really the stock braking system is more than sufficient so BBK's are really for bling points. I only installed my Racing Brake BBK because I bought it off a buddy cheap.
9krpmrx8 is offline  
Old 08-14-2015, 11:26 AM
  #3  
Registered
Thread Starter
 
Join Date: Nov 2014
Location: Kent, United Kingdom
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by 9krpmrx8 View Post
I have standard calipers in the rear with two piece Racing Brake rotors in the rear and RB pads. But really the stock braking system is more than sufficient so BBK's are really for bling points. I only installed my Racing Brake BBK because I bought it off a buddy cheap.

I would like to do the same but the Racing Brake Rotors are slotted are they not? It would look odd compared to the front drilled discs...


Same story for me, guy was selling parts off his car and it was cheap so I couldn't miss it. My preference would also be slotted rotors.


I don't think anyone does a 2-piece drilled rear rotor so like you say I might just have to leave the rears stock. My only concern is that once I have the 4 pot on the front the brake bias will be more front orientated.


I suppose what I could do further down the line, is swap the front drilled rotors for the RacingBrake 2-piece slotted ones and then get the matching rears I guess...
J2daG1990 is offline  
Old 08-14-2015, 02:50 PM
  #4  
Registered
iTrader: (1)
 
Join Date: Mar 2013
Location: BC
Posts: 129
Likes: 0
Received 2 Likes on 2 Posts
If they designed the kit properly, it'll keep the balance the same as stock. Also, I think DBA makes 2 piece rear rotors, but I don't know if they offer them in drilled. My vote is to keep it stock.
Black2010R3 is offline  
Old 08-17-2015, 05:14 AM
  #5  
Registered
Thread Starter
 
Join Date: Nov 2014
Location: Kent, United Kingdom
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Black2010R3 View Post
If they designed the kit properly, it'll keep the balance the same as stock. Also, I think DBA makes 2 piece rear rotors, but I don't know if they offer them in drilled. My vote is to keep it stock.
Well it is a Brembo so I would hope so! Think i'll be keeping the rears stock in that case, but making sure both the front and rear pads are the same compound.
J2daG1990 is offline  
Old 09-19-2015, 03:00 PM
  #6  
Unregistered User
 
stickmantijuana's Avatar
 
Join Date: Apr 2006
Posts: 824
Likes: 0
Received 0 Likes on 0 Posts
nothing. if you need to slow from 100mph to 40mph repeatedly in a short period of time, get vented rotors.
stickmantijuana is offline  
Old 09-20-2015, 11:06 AM
  #7  
Registered
iTrader: (1)
 
Join Date: Mar 2013
Location: BC
Posts: 129
Likes: 0
Received 2 Likes on 2 Posts
The stock rears ARE vented. If one really wants or needs bigger rears, Mazdatrix does sell a 13" rotor kit that relocates the stock caliper, so you get to keep the parking brake, but it will influence the brake bias somewhat.
Black2010R3 is offline  
Old 09-21-2015, 04:51 PM
  #8  
Registered
iTrader: (1)
 
Join Date: Nov 2012
Posts: 674
Received 13 Likes on 11 Posts
Just to add, drilled, slotted, 2 piece or 1 piece won't have any real effect on the brake bias, so no reason to upgrade the rear rotors on that basis.

Going to a bigger rotor, different piston size, or different pad size (or pad compound), will affect it. As mentioned above, I would expect a front BBK to be designed to work with the stock sized rear brakes.
blu3dragon is offline  
Old 09-24-2015, 09:20 AM
  #9  
Registered
iTrader: (1)
 
Join Date: Mar 2013
Location: BC
Posts: 129
Likes: 0
Received 2 Likes on 2 Posts
Pad size shouldn't cause the bias to change unless it's changing the effective lever arm that the pad is acting on the disk, usually approximated as the halfway point radially. So if one had a pad that's very thin radially at the outer edge of the disk, it'd increase the lever arm, but that's about the only way pad size should cause a change.

I'd also add that drilled, slotted or any other "fancy" rotor isn't an upgrade. If you like the looks and want them for that reason, then great. Don't expect any other advantage, but DO expect that they'll likely crack sooner than a plain disk when used really hard, like on track.
Black2010R3 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Azki23
New Member Forum
12
06-27-2018 03:48 PM
Carbon8
RX-8's For Sale/Wanted
41
04-04-2016 04:05 PM
Paul_Y
New Member Forum
21
09-21-2015 02:23 PM
LMURailsplitter02
New Member Forum
1
09-06-2015 10:56 PM
rxwilly8
New Member Forum
1
09-02-2015 02:42 PM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Front Brembo BBK - What to do with the Rears?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.