[Fot] Race Car Brake Calipers

[fubog1]

This...
g.

 


You are working on this problem too hard.  Or.....as once advised by an old, successful pro racer "more throttle, less brake"


The real issue to worry about is rear axles, front spindles and front and rear hubs.  Modern tires are the villain here, not brakes.  Actually, modern tires make the brake issue smaller.


 

 

 

-----Original Message-----
From: Mike Jackson <grandwazoo at earthlink.net>
To: Scott Janzen <sjanzen at me.com>; STEPHEN BOROWSKI <biznzman at pacbell.net>
Cc: FOT List <fot at autox.team.net>
Sent: Tue, Dec 1, 2015 6:37 pm
Subject: Re: [Fot] Race Car Brake Calipers



I had planned on staying out of this but my fingers have over ruled my brain....


My poor old TR3 has NEVER faded a brake at any race anywhere!  That includes an amazing bumper to bumper race with an ex IMSA, 6cyl Vitesse at Road America at a previous TR reunion.  I led him twice and we finished with a separation of a few inches.  There was no other 4 cyl Triumph within sight.  Similarly at tracks as brutal on brakes as Sebring at the 12 hr support race.  Ran it many times.  NO FADE, even at the old hairpin config.


You are working on this problem too hard.  Or.....as once advised by an old, successful pro racer "more throttle, less brake"


The real issue to worry about is rear axles, front spindles and front and rear hubs.  Modern tires are the villain here, not brakes.  Actually, modern tires make the brake issue smaller.


Mike Jackson


-----Original Message-----
From: Scott Janzen 
Sent: Dec 1, 2015 2:59 PM
To: STEPHEN BOROWSKI 
Cc: FOT List 
Subject: Re: [Fot] Race Car Brake Calipers

Brakes are definitely a limiting factor in many vintage cars.  One of the things that keep them vintage.  The rules for the three clubs below essentially say - calipers of the same size and number of pistons, rotors ditto.


SVRA says - 3. Alternate rotors and drums of the same diameter and thickness are permitted. Rotors may bedrilled or grooved.
4. Alternate calipers or wheel cylinders must be of the same material, design and number of pistonsas the original component. There must be no increase in the frictional surface of the pads or shoes 
		
VRG  - Brakes must be the original type (disc, drum), size, and design as supplied by the manufacturer, or listed option, for the model.  Updating from drum to disc will result in reclassification if eligibility timeline (e.g. 1960) is crossed.  Lining and pad materials are free.  Rotors may be drilled or grooved, but must be same diameter, thickness, and material as originally supplied.  Modern aftermarket calipers are not permitted.  
VDCA - Braking systems must be of the same type as standard for the year of manufacture or as homologated by the original manufacturer for that year.  Updating or backdating is not allowed.
1.       Aftermarket brake calipers are prohibited



On Dec 1, 2015, at 2:24 PM, STEPHEN BOROWSKI wrote:




Hello All,
I am starting the selection for front brakes on my TR4 racer. Naturally the old stock ones are out. Are the Toyota four piston calipers good enough? They are less expensive and easy to get, with disks and assorted pads. Which after market models work well and bolt wright in? Which disks work the best and last? 10 inch, 10.5 inch -- bigger or smaller?
All comments are welcome!
 
Thank You,
Steve & Matthew
Florida TR4 Racing

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