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#1 |
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Tony didn't say what car he's doing this on ,or if he's using an OEM master cylinder .
Many older disc drum cars have integral residual valves ,either in the master cyl itself ,or in the factory combination/proportion valve that can cause excessive brake drag when being converted from drum to disc . When making major system changes like this ,it's best to replace the master cylinder and the factory distribution block with parts that are sized properly for the application , particularly if the car will be foot braked . On several of the Stockers I've built I've used Bias valves on the front brakes , not the rear,to proportion proper braking , especially at the finishline.
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Tom Goldman 1500 SG , 1506 STK Last edited by Tom Goldman; 12-26-2015 at 12:53 PM. |
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#2 |
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Join Date: Jan 2006
Location: Zeeland, MI
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All the factory stuff is gone. Have a 1.030 strange master cylinder, I don't know if I need a bigger one. Sounds like I probably should upgrade to the bigger master cylinder also. I want to do it right, but not spend money on things I don't need.
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#3 |
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Tony, I think you should go with the 1 1/8 bore MC from strange. I believe you will have too soft a pedal with your current MC.
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Greg Hill 4171 STK |
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#4 |
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What kind of a car is it? Might have to move where the rod attaches to the pedal to get better pressures with a footbrake car. Tom
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Tom Meyer 5240 SS Stock ??? |
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#5 |
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Just got my new brakes from Lamb. In conversations with Roger he told me a few things.
1. he does not believe in reducing front brake pressure via an adjustable proportioning valve. 2. for 4 wheel discs, 4 piston caliper they recommend a 1 1/8" master cylinder. I can tell you from my experience building cars, we never use residual pressure valves on cars where the master cylinder is on the firewall. The RPV is only used when the master cylinder is mounted on the floor. |
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#6 |
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Thanks for the responses from everyone! I'm going to up grade the M/C to a 1.125 bore, and not use a proportioning valve. Thanks Tony
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