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Username Post: BBK question        (Topic#347635)
PMBell357 
Forum Newbie
Posts: 44

Reg: 03-24-16
10-11-17 06:03 PM - Post#2710577    

I will be running a 20 or 22 inch wheel on my SS vert. I will be on air ride (probably makes no diff). With those known factors, I am finding online (and calling companies) that state an 11" rotor will work just fine with my stated wheel size......but I have a guy whom I was going to purchase the BBK from initially saying it won't work with my wheels. he states YES it will fit, but its not "correct" for your vehicle and I need 13' in front, and 12" in back.

My question...how much of a gain would there be using a 13" rotor over an 11" rotor? Is there a substantial gain or is the big rotor just the latest fad....which is a BIG cost difference as well.

Thx for any help I can on this topic.



 
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nicke 
Frequent Contributor
Posts: 1079
nicke
Age: 34
Loc: Spokane, Washington
Reg: 01-06-12
10-11-17 06:43 PM - Post#2710582    
    In response to PMBell357

It really depends on how you'll use your car.

In my opinion, unless you plan on doing some serious autocross or road racing, 11" rotors on the front should be just fine. That being said, a larger rotor can mean more efficient braking, all other factors equal, but on a street driven car, you likely wont see much of a performance difference. Either setup is a huge improvement from drum brakes.

I do have 13" front rotors, and they work well. I hope this helps.
-Nick

My 65' Impala SS LS Swap

6.2L LS ,4L80E, 3.73 gears, disc brakes


 
PMBell357 
Forum Newbie
Posts: 44

Reg: 03-24-16
10-12-17 04:57 AM - Post#2710606    
    In response to nicke

Thx Nicke....I recall you saying you ran a set from POL. Do you still have the specifics of kit? What did you run in rear?



Edited by PMBell357 on 10-12-17 04:58 AM. Reason for edit: No reason given.

 
65_Impala 
Very Senior Member
Posts: 3847

Reg: 12-29-02
10-12-17 07:15 AM - Post#2710618    
    In response to PMBell357

The bigger brakes will fill the wheels more but the cheaper 11" kits with the large caliper will work fine. Just avoid the smaller metric caliper.



 
nicke 
Frequent Contributor
Posts: 1079
nicke
Age: 34
Loc: Spokane, Washington
Reg: 01-06-12
10-12-17 08:28 AM - Post#2710630    
    In response to PMBell357

Yep, exactly.
Here is the kit I'm running.

I'm still running the stock drum brakes as I haven't ever felt the need to go to disks back there. If I did, it would be for looks, as I feel like I have all the stopping power I'd ever need.
Hope this helps!

-Nick

My 65' Impala SS LS Swap

6.2L LS ,4L80E, 3.73 gears, disc brakes


 
raycow 
Honored Member
Posts: 26708
raycow
Loc: San Francisco, CA
Reg: 11-26-02
10-12-17 11:04 AM - Post#2710645    
    In response to PMBell357

Keeping everything else equal, you lose some braking performance as the tire (not wheel) O.D. increases. Think of it as a reduction in leverage directly proportional to the increase in radius.

In other words, even if you are totally satisfied with the performance of your present brakes, you may not be happy with them when you go from stock size wheels (or whatever size you have now) to 22" wheels because of the increase in tire O.D. To retain your previous braking performance, you will have to install "better" (which could mean larger diameter) brakes.

I hope this makes sense, but if it doesn't, feel free to ask and I will try to come up with a better way of explaining it.

Ray



There's a line between good and evil no wider than a razor's edge - D.S. James Hathaway quoting from The Night Keeper


 
Crusty66 
"5th Year" Gold Supporting Member
Posts: 303
Crusty66
Age: 57
Loc: Albany, eNZed
Reg: 11-04-12
10-12-17 01:33 PM - Post#2710661    
    In response to raycow

From my personal experience-

the 11" is a waste of time - the braking performance is inadequate for such a large heavy car. I ran the 11" with the large caliper & was not happy. Where I live we have very twisty roads & got a bit of fade with heavy use. I fitted the CPP big brake 13" kit & transformed the braking, well worth the price difference.

If you search back through the forum, I'm sure there are other posts saying the 11" rotors are inadequate.

Beware though that the 12" CPP rear kit with the Lincoln style calipers might have clearance issues with the caliper hitting the frame. I had to remove mine & fitted Wilwoods to the rear.
The Wilwoods with the drum type e-brake is much better.


Steve
1966 Caprice 396 496 496mkII TH400


 
PMBell357 
Forum Newbie
Posts: 44

Reg: 03-24-16
10-13-17 07:35 AM - Post#2710724    
    In response to raycow

Perfect sense.



 
PMBell357 
Forum Newbie
Posts: 44

Reg: 03-24-16
10-13-17 07:37 AM - Post#2710725    
    In response to Crusty66

ahhh so this is useful as I was about to call CPP for a talk concerning their 13' BBK. Thx.



 
PMBell357 
Forum Newbie
Posts: 44

Reg: 03-24-16
10-13-17 07:40 AM - Post#2710728    
    In response to 65_Impala

yeah...I've seen a few of those trying to get passed off. This is a cutthroat game....almost like vehicle transportation hahah



 
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