| Re: 9" with disk brake question?? |  |  | |
| Re: 9" with disk brake question?? -- Stephen Moore | Post Reply | Top of thread | Maverick Message Board |
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Posted by: Ken Merring 01/21/2002, 16:53:47 |
Well, I finally found a 9" out of a Lincoln Versailles and it came with the original disk brakes. My question is what modifications must I make to get the correct pressure to the rear discs? I've been told that an adjustable proportioning valve will do the job? Do I need to bypass the original proportioning valve? One more question, the brake calipers and discs need to be replaced and from what I can find for what it costs to replace everything I could upgrade to a Wilwood or Aerospace Engineering rear disc setup. I think this would be the best route, what do you guys think?? Thanks for all the help!!
.......................... ....Unless your going to run 150 mph and do hard braking, your going into over kill with aftermarket brake set up. Remember that upon brakeing, there is weight tranfer to the front. There is only so much tire bite in the rear and over braking will just cause lockup. Install a standard proportioning valve. Breakin the linning, then do some hard (controlled) stops on a smooth surface road. If the rear locks up, then install an adjustable valve in the rear line and adjust down the pressure till no rear lockup occurrs. Thats all you can get out of the brake system. By putting a valve in line you already are waisting rear brake area as it is. ...Remember that this front to back ratio is dependent on disc sizes, friction material, tire size and compond, car weight and to some degree the suspension and height. ...Most cars today have smaller disc on the rear than the front so there is not an excess of disc area . Like tire bite; the larger the brakeing surface area the smaller the effort required to stop and less heat/wear. I would think there is a practial limit in cost to obtain good braking performance. ...Some experience to relate, I just relined the front and rear of my Lincoln Sport Coupe. Performance Friction pads front/Raybesto-rear. The front disc pads use the full surface on the out side and only 3/4 of the inside surface. The rear discs use full surface both sides. This is how the factory engineered there ratios. Really fine stopping now. ... I converted to 11" disc on a Comet with the 10" drum on the rear and still had to put an adjustable valve in the rear line to balance up. Hope this helps gives some insight into brake requirements. Good luck,Ken |
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