Need a little direction on brake upgrade
#41
Junior Member
Thread Starter
Join Date: Jan 2014
Location: Port Saint Lucie,FL
Posts: 476
Total Cats: 12
Nice brake pad carnage!
I know this setup is probably overkill for the majority of the driving I do, however - an insufficient braking system is one of the main reasons I have not been back to the track post-turbo...
I know this setup is probably overkill for the majority of the driving I do, however - an insufficient braking system is one of the main reasons I have not been back to the track post-turbo...
#42
You CAN put together OEM stuff that will work, but it will be compromised and eventually consumables will have paid for a BBK. Something is wrong with Thumpetto's setup. That's an anecdote i'd throw out in the context of this scenario. Not to mention that a street car on 15x7s probably isn't really the same sort of car we're talking about here. And i'd agree with him, a BBK isn't needed for a street car with 15x7s.
#43
Elite Member
iTrader: (7)
Join Date: Jan 2008
Location: Statesville, NC
Posts: 2,737
Total Cats: 317
Just a reminder (i wish someone would have told me this before I dropped 2k on brakes) "upgraded" brakes wont actually stop the car faster.
You can easily lock up the stickiest tires on earth with oem miata brakes.
Seriously, its not worth it (to me). They are just bling, and you could have spent that money on aero, or something else that may benefit you greater.
Especially since you dont seem to brake hard in the first place.
You can easily lock up the stickiest tires on earth with oem miata brakes.
Seriously, its not worth it (to me). They are just bling, and you could have spent that money on aero, or something else that may benefit you greater.
Especially since you dont seem to brake hard in the first place.
#44
Senior Member
iTrader: (8)
Join Date: Mar 2006
Location: Indianapolis, IN
Posts: 1,105
Total Cats: 229
So you are complaining that your rotors are noisy, but also complaining that they aren't floating. You do realize that floating rotors make a ton of noise that you will hear at low speeds on the street, right?
#45
Its just no one talks about certain parts and how noisy they are. I have mesophonia, and it was a large undertaking getting used to very expensive loud parts (squeaky xidas, and rattly brakes) The parts i added, like mazdacomp engine mounts, or delrin CA bushings, i knew about the nvh increases before hand.
im not saying the noise is bad, just trying to help another member that might appreciate all the details.
im not saying the noise is bad, just trying to help another member that might appreciate all the details.
#47
What happened to spending a few hundred bucks ducting the stock rotors before dropping a grand on a kit? Once big rotors get too hot, the rate they cool off will be dictated by airflow anyway. I'm sure the extra area helps, but I bet the airflow helps more. Are there any racing series that allow real pads and ducting but not bbks?
I would try ducted XP10/8 on centrics before going full bling.
One thing I discovered recently when looking to get the car trackable is that:
I would try ducted XP10/8 on centrics before going full bling.
One thing I discovered recently when looking to get the car trackable is that:
- Big brakes require 15x10 wheels
- Big wheels require body work and narrow springs
- Narrow springs means might as well upgrade to Xidas
- Might as well duct brakes first since that has no dependencies
#48
What happened to spending a few hundred bucks ducting the stock rotors before dropping a grand on a kit? Once big rotors get too hot, the rate they cool off will be dictated by airflow anyway. I'm sure the extra area helps, but I bet the airflow helps more. Are there any racing series that allow real pads and ducting but not bbks?
I would try ducted XP10/8 on centrics before going full bling.
One thing I discovered recently when looking to get the car trackable is that:
I would try ducted XP10/8 on centrics before going full bling.
One thing I discovered recently when looking to get the car trackable is that:
- Big brakes require 15x10 wheels
- Big wheels require body work and narrow springs
- Narrow springs means might as well upgrade to Xidas
- Might as well duct brakes first since that has no dependencies
- Nope
- Maybe
- Yes
- Yes
#49
Moderator
iTrader: (12)
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 20,645
Total Cats: 3,009
Yeah, I don't buy the argument that you have to have the biggest wheels and tires and the biggest brakes and the biggest spring package and the biggest turbo setup to be trackable. I think incremental improvements in any of the components are the way that most of us proceeded. We didn't jump right into a 350 plus horsepower car with massive brakes and massive slicks and 1000 lb Springs. That's how Race shops build race cars but that's not necessary to build a trackable dual duty car. I started off on used street tires on 15x6.5 and then graduated to used SM6 and DIY bilsteins. I did a lot of track days and had a good time learning. I wasn't trying to win anything. I just wanted to have fun. As I used stickier tires and went faster I needed more brakes.
#52
Elite Member
iTrader: (2)
Join Date: Aug 2016
Location: New Fucking Jersey
Posts: 3,890
Total Cats: 143
Its just no one talks about certain parts and how noisy they are. I have mesophonia, and it was a large undertaking getting used to very expensive loud parts (squeaky xidas, and rattly brakes) The parts i added, like mazdacomp engine mounts, or delrin CA bushings, i knew about the nvh increases before hand.
im not saying the noise is bad, just trying to help another member that might appreciate all the details.
im not saying the noise is bad, just trying to help another member that might appreciate all the details.
Last edited by ridethecliche; 05-16-2018 at 05:55 PM.
#53
Junior Member
Thread Starter
Join Date: Jan 2014
Location: Port Saint Lucie,FL
Posts: 476
Total Cats: 12
Got it all together!
Ran into a couple small unexpected things, but nothing terrible. The PFC 7754.11.16.44 pads are designed for the caliper with the bridge bolt, not the big W retainer so I had to grind out the center of the backing plate to fit.
I called PFC and they do not yet make a 7816 wilwood style pad.
And the wheel weights hit the outer edge of the caliper so I had to rebalance my tires. I ended up just static balancing them in the center of the wheel and they feel fine.
Also had to do some backing plate trimming.
Also had to cut a lot off the rear plate to fit the sport bracket and rotor. Used some tin snips to cut about 3/4" off the edge of the backing plate and a chunk off where the caliper now sits. ( no pics of that tho)
Took it out, did a 30 to 5mph, 60 to 5mph, then an 80 to 5mph to bed the pads in. So far everything seems really nice. The pads are quiet, pretty dusty but I have been pretty hard on them so that might add to it. Only really need to adjust the proportioning valve when I get some more time. The pedal is nice and high, firm, and so far it's easy to control the pressure to not lock up the tires on hard stops. Time to get back on the road course!!
Ran into a couple small unexpected things, but nothing terrible. The PFC 7754.11.16.44 pads are designed for the caliper with the bridge bolt, not the big W retainer so I had to grind out the center of the backing plate to fit.
I called PFC and they do not yet make a 7816 wilwood style pad.
And the wheel weights hit the outer edge of the caliper so I had to rebalance my tires. I ended up just static balancing them in the center of the wheel and they feel fine.
Also had to do some backing plate trimming.
Also had to cut a lot off the rear plate to fit the sport bracket and rotor. Used some tin snips to cut about 3/4" off the edge of the backing plate and a chunk off where the caliper now sits. ( no pics of that tho)
Took it out, did a 30 to 5mph, 60 to 5mph, then an 80 to 5mph to bed the pads in. So far everything seems really nice. The pads are quiet, pretty dusty but I have been pretty hard on them so that might add to it. Only really need to adjust the proportioning valve when I get some more time. The pedal is nice and high, firm, and so far it's easy to control the pressure to not lock up the tires on hard stops. Time to get back on the road course!!
#55
I lusted after a bbk for years. I finally get the radial mount wilwoods with ap jhook rotors. They look awesome. They fit 15x7 rims without a spacer. They also are still fixed rotor ( 350dollars per rotor and it aint a floating) They clunk loudly over bumps. They take (estimate) 3 times the pedal force to stop.
I know about the issues with stock brakes, but ****, they work, and the rotors are cheap, pads are about the same, and the op doesnt seem to brake hard enough to merit a bbk.
Im all for spending money all ***** nilly, but just standing my ground with a different perspective.
I know about the issues with stock brakes, but ****, they work, and the rotors are cheap, pads are about the same, and the op doesnt seem to brake hard enough to merit a bbk.
Im all for spending money all ***** nilly, but just standing my ground with a different perspective.
Floating rotors dont need to clunk. Some floaters use conical washers or spring clips to preload against the hat so there is no rattle, but the rotor can still float with thermal expansion. It could have been the pads moving around inside the pad cavity as well - pad spring clips can stop that kind of thing.
3 times the pedal force? This means that caliper piston sizes were wrong or the Master Cylinder needed to be changed. Either way, poor design unless they state you need to change other hydraulic components in the system to balance the output and retain pedal feel. If you had found anyone else running this kit, they would have experienced the same problems as you?
BBKs are all about thermal capacity and the ability to shed heat faster than stock. Some actually do stop the car faster (shorter distances) than stock, because they manipulate some small percentage of balance to the rear of the car (factory front bias for liability). But in general, BBKs allow you to beat on the brakes without getting into a fade situation. On track, you want them running in the proper temperature range for the pad you are using. Too much ducting or running too cool for a particular pad will hurt performance, while too hot will do the same. Ducting should be used ONLY when indicated by temperatures, and even then only as much as needed to get into the optimum temperature range of the pads being used.
If you never fade brakes on your car and you are not cracking rotors from heat cycles after a few events, or wearing pads super fast, there is no real advantage to a BBK besides possibly weight savings. Higher horsepower cars have more momentum, so the brake demand is higher - but this only means the temperature comes up more quickly and stays higher baseline as compared to the same brake system on a lower power car. In a BBK, the rotor may have the ability to cool more quickly than a stock rotor not because of ducting but because of vane design. So in addition to more capacity, it also has more efficient cooling.
Thread
Thread Starter
Forum
Replies
Last Post
sbcrx007
Suspension, Brakes, Drivetrain
28
08-03-2014 05:41 PM