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Old 02-29-2008, 18:24   #1 (permalink)
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Need More Braking Power

I have a 1987 Ford Ranger 2wd, standard transmission that originally had a 2.3L engine.

I replaced the internal combustion engine with an electric motor and the gas tank with 1400 lbs of deep cycle lead acid batteries. The state inspector took it for a drive with some sort of inertia measuring device and said it wasn't stopping quickly enough (.6 G's, expecting at least .7)

The conversion kit includes a vacuum pump to accommodate the brake vacuum booster. We have added a vacuum reservoir.

Are there larger master cylinders/vacuum boosters available that will fit nicely into this one? Are there after market larger rotors and calipers that can be put on the front wheels without having to weld in different supports etc? Any other ideas that might help this thing stop better?
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Old 03-01-2008, 09:03   #2 (permalink)
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Re: Need More Braking Power

you can try newer parts for the newer model rangers they should fit up nicely. i know a company made 98 rangers into electric rangers
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Old 03-01-2008, 12:41   #3 (permalink)
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Re: Need More Braking Power

It would be nice to have some insight into the hydraulic power associated with the brake system. The man at the NAPA store in town told me there is 2000 lbs of pressure within the system when the brake is applied. Is that a valid statement? Does it vary from model to model? Can I get more hydraulic power at the wheel cylinders if I install a bigger (whatever that means???) master cylinder?
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Old 03-02-2008, 07:47   #4 (permalink)
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Re: Need More Braking Power

i did think of something to try, the brake power booster is powered by a vacuum off of the engine. re establish the vacuum and the brakes should work like they once did
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Old 03-03-2008, 13:22   #5 (permalink)
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Re: Need More Braking Power

After getting several replies to the original question replies to the following two questions would really be helpful.

Has anyone out there actually done an upgrade to the larger 2 piston calipers from the newer (93-97) rangers on the equivalent of a 1987 Ranger with 2 wheel drive? Is there a kit available? Is there welding involved with the upgrade?

Same thing with upgrade to 10 inch drums on the back. Has anyone done this on the equivalent of a 1987 Ranger 2 wheel drive? Is there a kit available? What kind of processes are required. Is it a matter of unbolting the 9 inch and bolting back in the 10 inch or is hack sawing and welding involved or perhaps a whole new axle required?
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