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01-17-2018 #1Registered User
- Join Date
- Sep 2010
- Location
- Germany
- Posts
- 40
..which size bore master cylinderi really need
Guys, i have a to hard brake pedal feeling in my 65 Olds 442 with a 1" master and disc/drum
( pushrod bolt to upper hole)
This combination works until i switch from power to manual... always read that with power brakes you need 1 1/8 and with manual 1 "
Sooo it´s seems i´m a exception, question is now...which size?
Must i goo to a 15/16“ master and hope everything will be okay or better go to 7/8“ and be safe ?
thanks from germany
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01-17-2018 #2It really depends on your calipers piston area and pedal ratio. Which calipers are you using? I'd guess pedal ratio is 6:1? Most likely though a 7/8" is going to be what you need.
01-18-2018 #3Registered User- Join Date
- Sep 2010
- Location
- Germany
- Posts
- 40
What i know is, the front Disk (10.75") & calipers are from the 67-72 cars...i assume stock size is 2.75" (one piston)
About the piston ratio: really don´t know, never measure it--- I only bolted the rod to upper hole....
Let me know if must measure the ratio.
01-19-2018 #4