Rotora BBK in the Rear!!!???
09-02-2011, 01:18 PM
#1
Instructor
Thread Starter
iTrader: (5)
Join Date: Nov 2006
Location: South jordan Utah
Age: 41
Posts: 150
Likes: 0
Received 8 Likes
on
8 Posts
Rotora BBK in the Rear!!!???
Guys I have a chance to get a Rotora BBK Front brake kit, and i want to adapt this to the rear of the car. I know it can be done, because i have seen some people on the forum with it.
Can anyone help me with this and let me know what i will need to make this mod happen?
Matt
Can anyone help me with this and let me know what i will need to make this mod happen?
Matt
09-02-2011, 04:52 PM
#4
Boomer SOONER
Join Date: Jul 2003
Location: McKinney, TX
Age: 41
Posts: 3,729
Likes: 0
Received 14 Likes
on
14 Posts
because when you brake the weight shifts forward and that is why on every car the front brakes are always the bigger/more powerful set - the BMW 1M has a single piston rear brake and it is a quick car to say the least. Front brakes do the vast majority of all braking, especially on hard brakes.
heck even until recently full size trucks only had drum rear brakes
heck even until recently full size trucks only had drum rear brakes
09-03-2011, 12:27 PM
#5
Instructor
Thread Starter
iTrader: (5)
Join Date: Nov 2006
Location: South jordan Utah
Age: 41
Posts: 150
Likes: 0
Received 8 Likes
on
8 Posts
look man, i hear you. I know the front brakes do most of the braking on cars. However to say that adding a 13" rotor with a 4 piston caliper will only help braking by 5%. doesnt seam right. I would think it would be a night and day difference after i add this.
But im still looking for the people on the forum that have done this to there TL or CL. I need to know what parts i will need.
Thank you
But im still looking for the people on the forum that have done this to there TL or CL. I need to know what parts i will need.
Thank you
09-03-2011, 02:08 PM
#6
put your money into good fronts
70% of the braking torque is generated there
Adding more rear brake to a front heavy, front wheel drive car- makes the rear tend to come around easily, especially under heavy braking and mass forward weight transfer ie: spin out!
Race cars have bias adjustment in car,, the wheels locked up and spin off course at end of straight? - too much rear bias
there is so little weight on the back- its got plenty of force as is, upgraded rotors and pads are your best investment, Dont need slotted or drilled on rear,,just bling
BBK on front- if you have the big bucks to do it right- go for it
those on a budget can upgrade to 2 piston 1995 legend LS-C front calipers for same price as stock TL caliper,,definite increase in overall brake feel and action
70% of the braking torque is generated there
Adding more rear brake to a front heavy, front wheel drive car- makes the rear tend to come around easily, especially under heavy braking and mass forward weight transfer ie: spin out!
Race cars have bias adjustment in car,, the wheels locked up and spin off course at end of straight? - too much rear bias
there is so little weight on the back- its got plenty of force as is, upgraded rotors and pads are your best investment, Dont need slotted or drilled on rear,,just bling
BBK on front- if you have the big bucks to do it right- go for it
those on a budget can upgrade to 2 piston 1995 legend LS-C front calipers for same price as stock TL caliper,,definite increase in overall brake feel and action
Trending Topics
09-03-2011, 06:21 PM
#8
then you are done
09-05-2011, 03:39 PM
#11
call or PM Josh at Excelerate,,he is the bbk man to ask,
if its made he will sell it to you~
the rest of us understand braking dynamics of the TL
if its made he will sell it to you~
the rest of us understand braking dynamics of the TL
09-05-2011, 03:44 PM
#12
note= the gen3 type S came with brembo fronts,,
and the rears were the same single piston we all have
If you have a really fast car, chances are you will be doing some trail braking into corners, or braking thru the entry of off camber corners etc
the rear is light and the dynamic load is angled, weight transfers off a rear wheel...
too much rear brake and that thing is comin around !!
and the rears were the same single piston we all have
If you have a really fast car, chances are you will be doing some trail braking into corners, or braking thru the entry of off camber corners etc
the rear is light and the dynamic load is angled, weight transfers off a rear wheel...
too much rear brake and that thing is comin around !!
09-07-2011, 11:06 AM
#13
Boomer SOONER
Join Date: Jul 2003
Location: McKinney, TX
Age: 41
Posts: 3,729
Likes: 0
Received 14 Likes
on
14 Posts
you dont want to believe us so do some other research on your own and you will get the same info. If you want to put the new rear brakes in then get after it - it wont hurt but it wont help either
09-07-2011, 11:19 AM
#14
MechEng
iTrader: (9)
Please read the brake bias chapter of Caroll Smith's "Tune to Win". In fact read all of his books. You will get a much better understanding of vehicle dynamics.
Also the rear brakes have a parking brake shoe and drum so I doubt the front BBK can be retrofitted to the rear.
Also the rear brakes have a parking brake shoe and drum so I doubt the front BBK can be retrofitted to the rear.
The following users liked this post:
01tl4tl (09-08-2011)
09-07-2011, 05:07 PM
#15
Senior Moderator
Please read the brake bias chapter of Caroll Smith's "Tune to Win". In fact read all of his books. You will get a much better understanding of vehicle dynamics.
Also the rear brakes have a parking brake shoe and drum so I doubt the front BBK can be retrofitted to the rear.
Also the rear brakes have a parking brake shoe and drum so I doubt the front BBK can be retrofitted to the rear.
09-08-2011, 11:04 AM
#16
how did we miss The White Elephant on the Internet?
Doh!
who needs park brakes anyway,,move to where its flat, or carry a block of wood~
Doh!
who needs park brakes anyway,,move to where its flat, or carry a block of wood~
09-19-2011, 10:38 PM
#18
Senior Moderator
iTrader: (2)
Join Date: May 2000
Location: where the weather suits my clothes
Age: 55
Posts: 27,921
Received 1,080 Likes
on
661 Posts
they sell big rotors for the back i saw these on ebay http://www.ebay.ca/itm/Big-Brake-Kit...item2310a7cbd2
Designed to run with your factory calipers
This is not a BBK This is a BBR (big brake rotor) Nothing else. Well it's a quite expensive BBR if that means anything.
09-26-2011, 08:54 AM
#19
Senior Moderator
So i got to thinking. Yes you can buy a kit that has the parking brake incorporated into the rotor. OR with a little work and machining i dont see why we couldnt have a set of brackets made and run a setup like the NSX with a 2nd caliper with the sole purpose as a parking brake. It might open up more rotor options. Especially if the larger caliper brackets being custom you could in theory run front rotors and calipers in the rear (using a custom brake bias adjuster to make sure brake pressure was optimal 
09-26-2011, 08:55 AM
#20
Senior Moderator
Enjoy the thoughts 
09-26-2011, 06:04 PM
#21
6G TLX-S
Painted aftermarket brake calipers sure look much nicer than the plain old OEM ones at the rear of a car.
09-28-2011, 11:39 AM
#22
Senior Moderator
Agree. I need to look into this a little more this winter 
09-30-2011, 11:20 AM
#26
Senior Moderator
It would be the way to have a larger set of calipers AND a parking brake. It would allow the use of just about any caliper and rotor. All one would need are brackets machined (wouldnt be that hard as they are made to get the RL calipers to bolt up to our fronts, id say rears could be made as well.
02-15-2013, 01:01 AM
#27
I have a set of 4 piston rear calipers and called rotora for a quote. It was $1600 for them to make me a rotor and brackets to make it work
1100 for the 2 piece rotors.
320 for brackets
100 for brake lines.
Im trying to figure out what other rotor works. Like u I have a one piece front kit and want bbk all around just for looks
some people have suggested honda pilot rear rotors. If so you would get those for under 200. I can't see myself saying 1100 to get some rotors made lol. the bracket price and line price is fair though
1100 for the 2 piece rotors.
320 for brackets
100 for brake lines.
Im trying to figure out what other rotor works. Like u I have a one piece front kit and want bbk all around just for looks
some people have suggested honda pilot rear rotors. If so you would get those for under 200. I can't see myself saying 1100 to get some rotors made lol. the bracket price and line price is fair though
02-15-2013, 10:25 AM
#28
Senior Moderator
Rotor wise it would just be a matter of finding what dia rotor you wanted to use and bolt spacing. When we use the RL rotors and bracket we use the 350z track pack rotor for the front. Any bracket made would have to be made for the specific rotor being used.
The following users liked this post:
mikebikelife (02-15-2013)
02-15-2013, 02:32 PM
#30
Senior Moderator
Considering you would have to make 2 for each wheel (one for the BBK and one for the separate parking brake caliper) it sounds about right. The bracket for the 2 on the front for the RL calipers runs about 160 ish so double that for 4 brackets.
02-16-2013, 04:19 AM
#32
I talked to rotora again today but this time on the phone. He is saying to bring the car in and we have to look at everything and we can give you an estimate again. I'm assuming he wants to see if I am even serious at this point. he wouldn't really talk prices on the phone but hinted it would be lower than that ridiculous $1600 estimate he gave before (which is pretty high considering I am supplying the calipers). I have had no real luck with any custom tuner shops or fab shops.
On the fone he kept talking about what to do with the parking brake. I suggested run the oem rear caliper (just to retain the parking brake) along with the rotora caliper as the actual break. He was kinda confused and wanted to see it in person. But I can't do that anytime soon since the car is back in nor cal. But I'm going to keep looking at options in the meantime.
On the fone he kept talking about what to do with the parking brake. I suggested run the oem rear caliper (just to retain the parking brake) along with the rotora caliper as the actual break. He was kinda confused and wanted to see it in person. But I can't do that anytime soon since the car is back in nor cal. But I'm going to keep looking at options in the meantime.
02-16-2013, 08:30 AM
#33
Senior Moderator
I talked to rotora again today but this time on the phone. He is saying to bring the car in and we have to look at everything and we can give you an estimate again. I'm assuming he wants to see if I am even serious at this point. he wouldn't really talk prices on the phone but hinted it would be lower than that ridiculous $1600 estimate he gave before (which is pretty high considering I am supplying the calipers). I have had no real luck with any custom tuner shops or fab shops.
On the fone he kept talking about what to do with the parking brake. I suggested run the oem rear caliper (just to retain the parking brake) along with the rotora caliper as the actual break. He was kinda confused and wanted to see it in person. But I can't do that anytime soon since the car is back in nor cal. But I'm going to keep looking at options in the meantime.
On the fone he kept talking about what to do with the parking brake. I suggested run the oem rear caliper (just to retain the parking brake) along with the rotora caliper as the actual break. He was kinda confused and wanted to see it in person. But I can't do that anytime soon since the car is back in nor cal. But I'm going to keep looking at options in the meantime.
02-16-2013, 10:34 AM
#37
Senior Moderator
02-16-2013, 11:51 AM
#38
So then the most ideal 4 corner BBK for our gen TL would entail 2 rotors 2 brackets 2 calipers for front. 2 rotors 4 brackets and 4 calipers in rear, 2 of which are parking brake. This seem correct? Would you use the Audi parking brake calipers or is there a generic aftermarket one that can be used? Do you then need a brake proportion adjuster as well??
02-16-2013, 12:05 PM
#39
Senior Moderator
So then the most ideal 4 corner BBK for our gen TL would entail 2 rotors 2 brackets 2 calipers for front. 2 rotors 4 brackets and 4 calipers in rear, 2 of which are parking brake. This seem correct? Would you use the Audi parking brake calipers or is there a generic aftermarket one that can be used? Do you then need a brake proportion adjuster as well??