Do Big Brake Kits work?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Apr 14, 2009 | 01:46 PM
  #16  
Blue Meanie's Avatar
Registered User
iTrader: (1)
Joined: May 2008
Posts: 2,217
Likes: 4
From: An Englishman in New York (state)
Pretty much spot on...
 
Reply
Old Apr 14, 2009 | 02:04 PM
  #17  
redlude97's Avatar
Registered User
iTrader: (25)
Joined: Feb 2006
Posts: 1,911
Likes: 8
From: Seattle, WA
Originally Posted by Krispyklene
so i'm pretty sure you were wrong.

it's pretty much this... BBK's don't fade whil under the pressures of constant breaking.... on my Base Model 350z i had the regular breaks and halfway up to canyon run it would hardly stop at all.... now on my track 350z, and on my sport pkg Coupe... you can definately feel the lack of brake fade during those same said runs. most people who have BBKs either: Track a lot or do canyon runs a grip... or like their car looking like pure SEX with those big calipers. Don't get anyone wrong... with an upgraded breaking system you will definately think you're braking faster but i'm not sure that you actually do.
brake. B R A K E
 
Reply
Old Apr 14, 2009 | 02:54 PM
  #18  
UnluckyCharms's Avatar
Registered User
iTrader: (7)
Joined: Feb 2007
Posts: 671
Likes: 0
From: Mar Vista (Los Angeles), CA
Originally Posted by Krispyklene
so i'm pretty sure you were wrong.

it's pretty much this... BBK's don't fade whil under the pressures of constant breaking.... on my Base Model 350z i had the regular breaks and halfway up to canyon run it would hardly stop at all.... now on my track 350z, and on my sport pkg Coupe... you can definately feel the lack of brake fade during those same said runs. most people who have BBKs either: Track a lot or do canyon runs a grip... or like their car looking like pure SEX with those big calipers. Don't get anyone wrong... with an upgraded breaking system you will definately think you're braking faster but i'm not sure that you actually do.
Again, the TIRES are the limiting factor in terms of braking performance. If the OEM binders can lock up a wheel, that means the performance of the brake system has exceeded the traction capacity of the tires.

BBK's give you more consistent feel and reliable performance in heavy use situations, due to their abilities to dissipate heat quickly. They also make it a bit "easier" to mess with your brake bias, but even that can be done by just slapping grippier pads in the front or rear.
 
Reply
Old Apr 14, 2009 | 02:59 PM
  #19  
Jeff92se's Avatar
Red Card Crew
iTrader: (24)
Joined: May 2005
Posts: 37,810
Likes: 585
From: ɐʍ 'ǝlʇʇɐǝs
Premier Member

I think most that run BBKs have upgraded tires/wheels also (to clear said bbk). Unless it clears the oem coupe 19s (many do).

If one can keep the 60-0 time near stock and gain a ton of fade resistance and pedal feel, consider it a success.
 
Reply
Old Apr 14, 2009 | 03:48 PM
  #20  
terrasmak's Avatar
Registered User
Joined: Dec 2007
Posts: 112
Likes: 3
From: Sin City
G Sedan
Originally Posted by UnluckyCharms
With a BBK, you get relatively good stopping power, but with the expense of additional rotating mass.
Rotating mass ?? My 2 piece rotors are lighter than my stock 1 piece rotors, wouldn't that be a reduction? Along with that , i also lost unsprung weight even with a 6 piston kit.
 
Reply
Old Apr 14, 2009 | 03:53 PM
  #21  
Jeff92se's Avatar
Red Card Crew
iTrader: (24)
Joined: May 2005
Posts: 37,810
Likes: 585
From: ɐʍ 'ǝlʇʇɐǝs
Premier Member

Correct. If only the 2 pc were't so damed expensive. DEFINATELY a "pay to play" deal. But IMHO, the weight savings are worth it.
 
Reply
Old Apr 14, 2009 | 03:59 PM
  #22  
Blue Meanie's Avatar
Registered User
iTrader: (1)
Joined: May 2008
Posts: 2,217
Likes: 4
From: An Englishman in New York (state)
Originally Posted by terrasmak
Rotating mass ?? My 2 piece rotors are lighter than my stock 1 piece rotors, wouldn't that be a reduction? Along with that , i also lost unsprung weight even with a 6 piston kit.
Rotating mass is a tricky one to work out. The fact it is further out from the hub centre means you have extra issues. It;s like the 'rotating in a chair, and you stick your feet out'.. Weight is the same, but rotation forces change when the weight is further out.
 
Reply
Old Apr 14, 2009 | 04:00 PM
  #23  
redlude97's Avatar
Registered User
iTrader: (25)
Joined: Feb 2006
Posts: 1,911
Likes: 8
From: Seattle, WA
yes, inertia is the real factor to look at, which 2 piece rotors only somewhat help with
 
Reply
Old Apr 15, 2009 | 12:04 AM
  #24  
UnluckyCharms's Avatar
Registered User
iTrader: (7)
Joined: Feb 2007
Posts: 671
Likes: 0
From: Mar Vista (Los Angeles), CA
Originally Posted by Blue Meanie
Rotating mass is a tricky one to work out. The fact it is further out from the hub centre means you have extra issues. It;s like the 'rotating in a chair, and you stick your feet out'.. Weight is the same, but rotation forces change when the weight is further out.
Correct, I believe it's called the Moment of Inertia (MOI), but I'm a bit rusty on my physics.

Regardless, assuming a BBK and stock brake setup have the same weights and MOI, the only immediate performance gain a BBK could offer is in helping you lock up your tires sooner. Consistent performance in high-demand situations is the main aim of BBKs. Oh, and they look okay too.
 
Reply
Old Apr 15, 2009 | 12:07 AM
  #25  
Jeff92se's Avatar
Red Card Crew
iTrader: (24)
Joined: May 2005
Posts: 37,810
Likes: 585
From: ɐʍ 'ǝlʇʇɐǝs
Premier Member

Would you rather deal with MOI w/ 26lbs or 16lbs? Because that's what you're looking at.
 
Reply
Old Apr 15, 2009 | 12:22 AM
  #26  
UnluckyCharms's Avatar
Registered User
iTrader: (7)
Joined: Feb 2007
Posts: 671
Likes: 0
From: Mar Vista (Los Angeles), CA
Originally Posted by Jeff92se
Would you rather deal with MOI w/ 26lbs or 16lbs? Because that's what you're looking at.
Are you trying to sell the idea based on deceleration, or acceleration? The stockers are strong enough to lock up the wheels, so I hope you're pushing the latter....
 
Reply
Old Apr 15, 2009 | 12:25 AM
  #27  
Jeff92se's Avatar
Red Card Crew
iTrader: (24)
Joined: May 2005
Posts: 37,810
Likes: 585
From: ɐʍ 'ǝlʇʇɐǝs
Premier Member

Originally Posted by UnluckyCharms
Are you trying to sell the idea based on deceleration, or acceleration? The stockers are strong enough to lock up the wheels, so I hope you're pushing the latter....
Yes and yes. Why?

Stockers can lock up with what type of modulation? How many times? For how long? Most have upgraded tires so that brings us to? On what tires BTW? Stock reo5os? sport pilots? turanzas?

Do you read any of my previous posts on the subject?
 
Reply
Old Apr 15, 2009 | 12:32 AM
  #28  
UnluckyCharms's Avatar
Registered User
iTrader: (7)
Joined: Feb 2007
Posts: 671
Likes: 0
From: Mar Vista (Los Angeles), CA
Originally Posted by Jeff92se
Yes and yes. Why?

Stockers can lock up with what type of modulation? How many times? For how long? Most have upgraded tires so that brings us to? On what tires BTW? Stock reo5os? sport pilots? turanzas?

Do you read any of my previous posts on the subject?
I'm not disagreeing with you. In all cases I can think of, a reduced MOI is great in terms of increasing performance. My point was simply that IF you are not pushing the car hard enough to induce brake fade, or boil the fluid in your lines, you probably won't appreciate the benefits of a BBK.

The stickier tires you run, the harder it's going to make your brakes work. This is not an issue in daily driving situations. If we're talking about race applications, I fully endorse BBKs.
 
Reply
Old Apr 15, 2009 | 12:39 AM
  #29  
Blue Meanie's Avatar
Registered User
iTrader: (1)
Joined: May 2008
Posts: 2,217
Likes: 4
From: An Englishman in New York (state)
all things being equal, (road condition, tyres, rims), then a BBK will not make you stop any quicker. It may well feel different on the pedal, but there is no reason a stock setup will stop you any slower than BBk. Racing applications are another matter entirely. repeated stresses on the rotors, pads and fluid will mean that the cooling aspect comes into play. However, boiling point of 5.1 is the same on both.
 
Reply
Old Apr 15, 2009 | 12:46 AM
  #30  
Jeff92se's Avatar
Red Card Crew
iTrader: (24)
Joined: May 2005
Posts: 37,810
Likes: 585
From: ɐʍ 'ǝlʇʇɐǝs
Premier Member

I upgraded from my 03 brakes to 06 non brembos. Very slight but significant upgrade. 60-0 times are the same but w/o the need for very aggressive pad materials and touchy brake feel. Rotors for the 12.5" are heavier than the 11.5" versions. But it's what I suffer with for the other benefits.

The most I'd upgrade to is probably an OEM Brembo w/ 2 pc rotors if I could swing it. Most likely overkill but it's not an outlandish upgrade. 2pc rotors would be to get the weights down to my original oem weight or less.

I don't know if you guys realize this but you're preaching to the choir here (as far as I'm concerned).
 
Reply


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 01:44 AM.