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  #41  
Old 10-01-2017, 06:58 AM
vstol vstol is offline
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Greg I see Wilwood recalled their 7/8yths bore MC. I think I am done with Wilwood do you have a suggestion with another MC? Thanks
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  #42  
Old 10-01-2017, 08:25 AM
dhutton dhutton is offline
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I am going to guess the issue is the bore, not the fact it is Wilwood. This is not voodoo. You can calculate your bore. Details in this thread:

http://www.pro-touring.com/threads/1...Tobin-of-KORE3

Caliper specs are here:

http://lukeskaff.com/projects/car/th...-measurements/

Don

Last edited by dhutton; 10-01-2017 at 08:27 AM.
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  #43  
Old 10-01-2017, 08:31 AM
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GregWeld GregWeld is offline
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Quote:
Originally Posted by vstol View Post
Greg I see Wilwood recalled their 7/8yths bore MC. I think I am done with Wilwood do you have a suggestion with another MC? Thanks

Yes they did --- certain codes on them --- not every one they ever built - but close! Had one on the Mustang track car!

Baer makes a real trick looking billet model.... if you're looking for "fancy" under the hood.... and I used a Tilton in the '33 (although it was dual singles with a balance bar).... AP Racing also has MANY styles of M/C and all kinds of mount options.


http://baer.com/Remaster.html


http://tiltonracing.com/product-cate...ter-cylinders/


https://www.apracing.com/products/ra...ted_types.aspx
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  #44  
Old 10-01-2017, 08:34 AM
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Quote:
Originally Posted by dhutton View Post
I am going to guess the issue is the bore, not the fact it is Wilwood. This is not voodoo. You can calculate your bore. Details in this thread:

http://www.pro-touring.com/threads/1...Tobin-of-KORE3

Caliper specs are here:

http://lukeskaff.com/projects/car/th...-measurements/

Don


TOTALLY AGREE!!


Lots of people get the bore, and or, pedal ratio wrong..... using a power brake pedal ratio on a manual master cylinder is a very common "mistake". But so too, is the wrong bore diameter.
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  #45  
Old 10-01-2017, 04:51 PM
vstol vstol is offline
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The std bore on a regular MC for the 71 corvette was 1 inch. I spoke with Wilwood many many times before going with 15/16ths since I had C-4 calibers and they used a 3/4 bore. The ratio is just shy of 6:1. I took it up to 45mph today, it stops but the brakes do not lock and its all pedal. Need to have good brakes before letting her loose, but the LS-3 427 is going to be sweet. This is crazy, I never had an issue before on my other builds. Thanks

Last edited by vstol; 10-01-2017 at 04:54 PM.
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  #46  
Old 10-01-2017, 05:06 PM
vstol vstol is offline
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Quote:
Originally Posted by dhutton View Post
I am going to guess the issue is the bore, not the fact it is Wilwood. This is not voodoo. You can calculate your bore. Details in this thread:

http://www.pro-touring.com/threads/1...Tobin-of-KORE3

Caliper specs are here:

http://lukeskaff.com/projects/car/th...-measurements/

Don
Interesting info I will peel it back but it showed a bore of 1.25 front and 1 inch rear. So if mine is 15/16 assuming it is not enough would that be a possible issue? Soft pedal not enough fluid going to the calibers?
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  #47  
Old 10-01-2017, 05:07 PM
dhutton dhutton is offline
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Quote:
Originally Posted by vstol View Post
The std bore on a regular MC for the 71 corvette was 1 inch. I spoke with Wilwood many many times before going with 15/16ths since I had C-4 calibers and they used a 3/4 bore. The ratio is just shy of 6:1. I took it up to 45mph today, it stops but the brakes do not lock and its all pedal. Need to have good brakes before letting her loose, but the LS-3 427 is going to be sweet. This is crazy, I never had an issue before on my other builds. Thanks
Do the math....

Don
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  #48  
Old 10-01-2017, 05:11 PM
dhutton dhutton is offline
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Interesting info I will peel it back but it showed a bore of 1.25 front and 1 inch rear. So if mine is 15/16 assuming it is not enough would that be a possible issue? Soft pedal not enough fluid going to the calibers?
I think you are confusing caliper bore with master cylinder bore. You use your caliper bore and pedal ratio etc to calculate the required master cylinder bore.

Don
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  #49  
Old 10-01-2017, 05:30 PM
vstol vstol is offline
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I was referring to the thread for MC which had a larger bore. Going through the thread for the math formula. Thanks
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  #50  
Old 10-01-2017, 05:47 PM
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THere is also a BEDDING procedure with brand new rotors and pads.....
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