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DRR Trophy
posted
never footbraked, does the master cylinder size/piston diameter make a difference in holding the car back, hence more starting line rpm?
 
Posts: 17 | Location: Glendale AZ | Registered: August 25, 2003Reply With QuoteReport This Post
DRR Pro
Picture of Eman
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Yes, the smaller the bore MC the more pressure but the longer the stroke as it moves less fluid. The larger the bore the less pressure but more fluid moved. Size of caliper or wheel cylinder pistons matter also and have to work with the MC sizing. At the caliper wheel cylinder end the larger the piston the more pressure but it requires more fluid volume.
 
Posts: 1463 | Location: E TN | Registered: February 13, 2009Reply With QuoteReport This Post
DRR Pro
Picture of CURTIS REED
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He pretty much covered it. You can get more pressure if you need it for a larger MC bore by changing the pedal ratio also. Most times you just don't have room to make large ratio changes though.



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Posts: 2951 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
DRR Trophy
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ok thanks guys, I just didnt know it was common practice to experiment with MC's, or just mash the pedal for all its worth!
 
Posts: 17 | Location: Glendale AZ | Registered: August 25, 2003Reply With QuoteReport This Post
DRR Pro
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I would think if you called the brake manufacturer of your choice they could figure the area of the brakes you want to use and give you a recommendation for master cylinder and pedal ratio.



____________________________
2017 and 2018 Osage Casinos Tulsa Raceway Park No-Box Champion

2018 Div4 Goodguys Hammer award winner
 
Posts: 2951 | Location: KIEFER, OK. | Registered: August 17, 2007Reply With QuoteReport This Post
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