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Would installing a manual master cylinder in a 1979 Datsun 280ZX be a good idea? Answered

I need to put in a new braking system in a Datsun 280ZX that I am converting to electric. Since there is no vacuum from an engine, I was considering using some sort of vacuum pump but I came upon using a manual master cylinder instead, which is good because it does not require extra power besides my leg, but since my vehicle initially came with power brakes, I am not sure if it will be compatible. I will most likely have to replace all the brake lines, because they are fairly old and there is a good chance that they've been damaged. So this gives me the chance to replace them with suitable lines for either type of master cylinder. Does anyone have any experience with this sort of thing? Any input would be greatly appreciated!



4 years ago

In my opinion, that's not a good idea. I'll try to avoid the obvious, "If you don't know what you're doing...etc." spiel. The facts are, that the power booster provides an advantage over standard hydraulic brakes in that it requires much less foot pressure on the brake pedal to stop the vehicle. This could be an issue to someone who lacks a lot of physical strength in their legs.
From a practical standpoint, the wheel brake cylinders may also have to be replaced because standard brakes may not exert enough pressure to actuate them fully.
When it comes to the braking system, more is better. Upgrade, don't retrograde.

I thought that manual and power master cylinders used the same principle, but the manual one used more leverage and a smaller bore to have enough pressure to brake the car. So it does take more leg strength to push the brake but not significantly...

you need one of these http://www.ebay.com.au/itm/12-volt-electric-vacuum-pump-brake-booster-vacuum-pump-12-volt-new-/230879547411