Hurricane HMS2002 build thread

[dlampe]

To finish up the rest of the system we had to chose the master cylinders. I have read on the Hurricane forum that some of the previous owners had trouble locking up the brakes. That shouldn't be the case even with the stock GM disk package included in the standard kit. I wanted to assume that the previous Hurricane company had put some thought into the system but just to be sure I decided to double check their work. Paul Proefrock sent me an Excel spreadsheet to determine the proper master cylinder given an optimize pedal pressure of 60 lbs. This took into account the pedal ratio, the rotor size, tire size, weight of the car, piston surface area front and back and the G force created given a maximum braking condition. There is probably more that went into the final answer but I don't remember. The formula gave us a master cylinder size closest to a .625 front and .750 rear with balance at the pedal set to neutral (50% front and rear). I think the original kits came with 1 inch masters. According to the spreadsheet we used, that would account for the tremendous effort needed to lock up the wheels. These new masters should provide more pedal travel and less effort needed to lock'em up! I have also installed a Willwood in line bias adjuster next to the drivers seat.