Oops, if have learned so many things during modification (by reading and experimenting)
By Reading:
1. Do remember that Drum and Disc brake master cylinders are different, you cannot interchange as per theory (Check Summit Racing on YouTube). Cylinder Bore in very important and it depends on something called pedal ratio and there is a maths behind it. Also, large the master cylinder bore size requires more pedal power, thus driver is suppose to push very hard if your booster is idle or failed.
1" Master Cylinder is recommended for major applications.
By Reading and Experimenting:
2. Double Diaphragm Booster is good, but it needs lots of air pressure and it is better to install addition air reservoir or Tank. This modification requires calculation with the size of reservoir or Tank in conjunction with vacuum pump size, moreover, it requires a low and high pressure switch for safety purposes.
- External Vacuum pump needs oil delivery and return lines, you should identity earlier position of delivery and return lines. You can get delivery line from Oil Switch with the help of TEE (T) and connect return line (with the help of TEE) to dipstick (modification: you need alter your dipstick length as well) or oil sump or any available plug in engine block.
In view of the above, I have installed Nissan CD1700 Double Diaphragm Booster with 1" Toyota Land Cruiser Master Cylinder. For Booster installation I need to expand walls and remove 5"x2" piece underneath Master Cylinder. Luckily, alteration work and Booster is excellently aligned with pedal.
I have selected Mitsubishi 2800 CC engine vacuum pump to work with brake booster but I am unable to figure-out proper or reason place for installation.
Let see the combination works or fail. So far I have completed the project in alternator replacement cost i.e. Rs. 8,000/- (approx.)
Wish me good luck !!!!
Regards,
Abdul.
