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Has anyone done that? Thinking of doing that and would like to call on anyone who has and what problems I could encounter.
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I have heard that running the stock booster on just the front brakes (disc) is something many people do.
54 Victoria 312; 48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ
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According to Gil Baumgartner ay CTCI , using the stock booster for the front disc brakes wont help at all because it can provide a 600-800 psi assist and front disc brakes require a boost of at least 1200 psi to provide a noticeable assist.
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Disc brake calipers are designed to operate at higher hydraulic line pressure than original drum brakes, as a result it is very beneficial to have a power brake booster. These steps are written presuming you have a power booster on your car. If not, the brake fluid lines would be slightly different. A booster is highly recommended. Even with a booster these brakes will not give you the feel of the disc brakes on your new vehicle, it still takes a bit of pedal pressure. The biggest advantage is the straight, true stopping, and the resistance to fade.
SOURCE - https://www.ctci.org/disc-brake-conversion/
A MIDLAND BOOSTER is designed for one circuit only as was common in pre-1967 cars (SGL RESVR MC). To keep the disc conversion somewhat OEM appearing, the front disc circuit (primary reservoir) will be plumbed through the BOOSTER HYD CYLINDER for disc power assist and the rear drum circuit plumbed straight from the MC secondary reservoir as they require less line pressure their being self-energizing.
The original kit design included different size rear wheel cylinders and was later changed to a universal PPV. Both methods seem to be hit and miss on brake bias. The booster will give enough assist to be noticeable.
The nice thing about this conversion is that the KH 4-Piston Caliper can be adapted to the OEM spindle (and keep original 14" wheels - 57 BIRD) and can be easily changed back to 4-wheel drum if the car goes to a dedicated restoration.
CTCI Install Photo Showing Rough Plumbing -
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