Thread: Front to Rear Brake Bias
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Old 08-15-2008, 10:14 AM
Shelboss Shelboss is offline
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Join Date: Jul 2004
Location: Hopkinton, MA
Cobra Make, Engine: early Contemporary Cobra (1005), 67 Shelby GT350 with Inline carb on a Boss 302
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Default Front to Rear Brake Bias
I just got this nifty little spreadsheet that calculates brake bias from Mickmate and now I'm dangerous. Contemporary used Jag XKE pedals and brakes with a VW Super Beetle master cylinder (.75" dia.) for their stock offering. The upgrade that they offered used Wilwood Superlite 4 piston calipers (1.38" dia.) with XJ vented rotors, machined hubs, and series II uprights. The stock Series I Jag stuff works out to 59% front brake bias and with the recommended upgrade 57%. For reference, the ideal is 66% and my Miata with about the same front to rear weight distribution as the Cobra is 70%. Using Wilwoods with the 1.75" piston diameter would change the bias to 67%, so by the numbers I think Contemporary got it wrong! I would like to hear from Contemporary folks on what brake bias works for you?
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