Originally Posted by BDD
Good info. There is no liability issue. But if someone says a part is a reasonable replacement and "bolts right on" they should then also go on to say....but you'll also have to modify this and this. Anything else is just incomplete.
|
I have posted over time close to 8 different braking systems I have installed on my cars and/or customer cars. The post with the Geo Master cylinder stated that "only two holes needed to be drilled since the mounting holes on the Opel Booster were further inboard." The same statement applies to the Honda master cylinder and some of the other I have used. Besides, the Geo unit is tiny, about 5" in length so there is no interference problem with the reservoir or anything else. It also uses two forward ports which are 10mm and one rear port which is also 10mm so the existing tube nuts can be used.
I have installed the Geo assembly on vehicles with front 2.5" diameter pistons and 11" rear drum brakes with 1 1/8" wheel cylinders. Never had a single problem with cars under the 4000Lbs range. And if you do a search on the web for Ford Falcon brake upgrades, the Geo mastercylinder/booster combination is the recommended cheap upgrade to a car that is over 3000Lbs.
Everyone says you must use a proportional valve and so on. What everyone misses is that on most of these Jap master cylinders, the unit comes balanced for 60/40 operation due to the placement of the inlet port, in respect to the outlet. So nothing else is needed besides a 10lb residual valve for the rear which with the emergency brake properly adjusted, I don't believe is required and I never used one.
Though I no longer have an Opel with a front mounted master cylinder, if anyone would like to see how it is done just let me know. I can show step by step what needs to be done to mount a Geo master to the Opel booster. If all you need is a stock master cylinder or booster, I have a good qty of new, rebuilt and used units in stock.