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Classic Trucks '47-'98 GM Trucks - Performance | Conversions | General Discussion

FF 14 Bolt Disc brake conversion

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Old 02-15-2010, 09:36 PM
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Default FF 14 Bolt Disc brake conversion

Just got finished putting disc brakes on my FF 14 Bolt. Question is do I have to replace the proportioning valve? I know that the drum brakes used a lot less brake line preassure to operate ans the disc's will require more. Thanks in advance.
Old 02-17-2010, 10:48 AM
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Nobody knows??
Old 02-17-2010, 08:14 PM
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Old 02-17-2010, 08:38 PM
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try it like it is then change it if need be. thats the best i can tell you.
Old 04-08-2010, 03:30 PM
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When I did a conversion on my FF14 and went ahead and changed the M/C (Disc/Disc for a Van), New (Disc/Disc) Prop Valve and added an additional adjustment on the rear for a post valve brake bias .. it helped fine tune the brake balance ... the rear of my truck weighs alot more than most.

With the new P/V I just wanted to eliminate the guess work on the disc/drum volume and 2/10 pressure and that was worth the $50 to me.
Attached Thumbnails FF 14 Bolt Disc brake conversion-th_100_0914%5B1%5D.jpg   FF 14 Bolt Disc brake conversion-th_100_0920%5B1%5D.jpg   FF 14 Bolt Disc brake conversion-th_100_0913.jpg  

Last edited by Burb; 04-08-2010 at 03:38 PM. Reason: Pics
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