Wilwood front kit for drum spindles - Page 2 - Impala Tech
Brakes & Suspension Conversion Questions & more

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post #26 of 36 (permalink) Old 11-15-2018, 05:39 AM Thread Starter
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What master cylinder and proportioning valve are you using ?

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post #27 of 36 (permalink) Old 11-15-2018, 06:09 AM
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Quote:
Originally Posted by Impala 66 View Post
What master cylinder and proportioning valve are you using ?


The proportioning valve is summitís own brand (or no brand). The MC and booster we got last year. I canít recall the name right now bit it is a popular brand. I will post when I remember.
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post #28 of 36 (permalink) Old 11-06-2019, 05:12 PM
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I would like to install same brakes kit, for a manual (without booster), what is the best master cylinder bore size with drums rear? 1" or less?

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post #29 of 36 (permalink) Old 11-06-2019, 05:54 PM
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I would like to install same brakes kit, for a manual (without booster), what is the best master cylinder bore size with drums rear? 1" or less?
Call wildwood and they will tell you exactly what master to use.
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post #30 of 36 (permalink) Old 11-07-2019, 06:59 AM
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OK 67SS, I've sent an email to Wildwood, I'm waiting them answer.
I will post them answer, if that can help.

I red lot of forums about bore size, most of people install 1" or less. It appears that Corvette uses 1" for manual brakes. Some people said that 15/16 or 7/8 can be a good option for a better pedal brake sensation (softer).

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post #31 of 36 (permalink) Old 11-07-2019, 10:41 AM
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Bore size of the master cylinder has to match the bore size of the wheel cylinders and the stroke of the brake pedal (as well as the foot pressure required since Granny Goodwhich has to be able to drive to church). A Corvette was designed not for dentist living their second childhood (that is what a Harley is for), but to road race. It doesn't behave the way a passenger car does, and Granny Goodwich really would hate to drive one. Your leg would feel like it fell off after twelve hours at Sebring or at Watkins Glen.

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post #32 of 36 (permalink) Old 12-28-2019, 05:22 AM Thread Starter
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I would like to install same brakes kit, for a manual (without booster), what is the best master cylinder bore size with drums rear? 1" or less?
I am using a 1" bore and the top hole on the pedal for a 6:1 ratio. I could not be happier. stops the car with very little effort

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post #33 of 36 (permalink) Old 04-08-2020, 03:47 AM
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Thank you for your feedback and help.
Everything is installed, new master cylinder (15/16" bore size) , proportioning valve, and disc brake kit. I'm happy because 12.9" kit fit with 15x8 Rally Wheels.
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post #34 of 36 (permalink) Old 04-08-2020, 11:35 AM
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absolutely shocking to me that you got a 12.9" disk on there with a 15" wheel!

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #35 of 36 (permalink) Old 04-08-2020, 12:00 PM
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Looks great. I have been really happy with ours.
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post #36 of 36 (permalink) Old 04-08-2020, 01:10 PM
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absolutely shocking to me that you got a 12.9" disk on there with a 15" wheel!
It's Corvette's Rally, maybe different to others?

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