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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Sorta a idea on big brakes small 15" wheels

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    7/11/2014 7:43 PM  #1

    True74yamaha
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    From: Salt Lake City
    Registered: 5/07/2013
    Posts: 2,462

    Sorta a idea on big brakes small 15" wheels

    So I was helping my fellow car nut friend with his 72 thunderbird. Now I know back in the day on the boss stangs and others people used bigger lincoln and similar calipers and rotors and a made a connecting bracket to pretty much mesh it together when they were doing track racing.  Well I decided to look at the rotos specs on my buddies lincoln and it says it's a 11.72 OD and 11.19 nom thick. What I was thinking about doing is if I decide to ever put on a styled steel wheels on my Stang is use that rotor and my already purchased 2013 gt brake calipers with the 72 rotors sense the two cars have almost identical nom specs. After all that being said I think it'd be easy to attach theses guys on my car sense I have a set of old kh caliper mounting brackets that I was given a while ago. All I'd need is some 3/8" steel plate cut and some holes drilled connect it all together and I'd have a 12" brake set up inside my 15"ers.

     

    7/12/2014 1:20 PM  #2

    lowercasesteve
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    From: Auburn, Ca
    Registered: 4/01/2013
    Posts: 1,219

    Re: Sorta a idea on big brakes small 15" wheels

    I have 12.2's on my 16" wheels, so 11.72's might just fit on your 15"s.  It will be very tight though.  I have about 1/16" clearence between the caliper and the inner diameter of the wheel.  They are Willwoods by the way.

    Your caliper design is the critical factor.  A little bump here or there makes a big difference.

    Original owner - 351w,T-5, 4whl disks, power R&P
     

    7/12/2014 2:07 PM  #3

    True74yamaha
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    From: Salt Lake City
    Registered: 5/07/2013
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    Re: Sorta a idea on big brakes small 15" wheels

    Very true.  I slid my gt calipers on my buddies lincoln rotor and then bolted the wheel on so I know it will clear my 15s I have now. So hopefully the styled steel wheels have the same id.  The only reason I'm farting with this idea is cause I'm not sure right now if I want to run 17s or not. But thought is share the info

       •Thread Starter
     

    7/14/2014 2:38 PM  #4

    MS
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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 11,746

    Re: Sorta a idea on big brakes small 15" wheels

    You need to consider clamping force capabilities, piston sizes etc before you go mismatching parts.  Consider this comparison.  Two systems both using exact same caliper and master cylinder.  One has 11" rotor and one has 13" rotor.  The caliper on the 13" rotor takes less pedal effort and hydraulic pressure to exert the same braking forces due to the longer lever arm created by the larger caliper.  The 11" rotor will make that same caliper require alot more force on the pedal to achieve the same amount of braking, but guess what... That extra force required to power the caliper will also cause the caliper to try to lock up the brakes quicker.

    I would try to stick with proven stuff, but let us know how it works out.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    7/14/2014 5:23 PM  #5

    True74yamaha
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    From: Salt Lake City
    Registered: 5/07/2013
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    Re: Sorta a idea on big brakes small 15" wheels

    Thanks MS I thought I'd throw the idea out sense I found out they'd mesh okay theoretically but yes I didn't put into factor what you said so maybe they won't work as good.

       •Thread Starter
     

     

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