:biggrin: I just got around to finishing the vacuum brake conversion for my GN. I am very pleased with the results. Since I am definitley keeping the GN, I went with all new/remanufactured parts even though junkyard parts would be much cheaper. (but I did however get the brake pedal from the junkyard)..The powerbooster I bought is the dual diaphragm setup, and I suspect it has much more assist power than a single diaphragm booster.
I am really impressed with the stopping power my new vac set up has, I was a bit skeptical since others have complained about vac set ups on this forum.
If you are looking to do a vac conversion and plan to buy the parts from a Kragen/ NAPA type of auto parts store, I suggest you buy the master cylinder and powerbooster separatley, they can be bought together as a kit together, but it would cost you an extra $60 compared to buying an individual powerbooster and an individual master cylinder and putting the two pieces together yourself. The only difference is you would have to also buy the 2 nuts that holds them together (no big deal).
So with the powerbooster, mastercylinder, used brake pedal, 3 feet of 3/4" vacuum hose, one Kirban's vacuum block with the vac brake inlet, and a large bottle of brake fluid, I spent a grand total of a bit over $200, but I was also able to sell my working powermaster to recover some of the costs
The conversion is really straight forward and only basic tools would be needed.
I decided to go vac instead of hydroboost because I think the parts are more universal and will be more readily available and cheaper than hydroboost parts in the future.
I am really impressed with the stopping power my new vac set up has, I was a bit skeptical since others have complained about vac set ups on this forum.
If you are looking to do a vac conversion and plan to buy the parts from a Kragen/ NAPA type of auto parts store, I suggest you buy the master cylinder and powerbooster separatley, they can be bought together as a kit together, but it would cost you an extra $60 compared to buying an individual powerbooster and an individual master cylinder and putting the two pieces together yourself. The only difference is you would have to also buy the 2 nuts that holds them together (no big deal).
So with the powerbooster, mastercylinder, used brake pedal, 3 feet of 3/4" vacuum hose, one Kirban's vacuum block with the vac brake inlet, and a large bottle of brake fluid, I spent a grand total of a bit over $200, but I was also able to sell my working powermaster to recover some of the costs
The conversion is really straight forward and only basic tools would be needed.I decided to go vac instead of hydroboost because I think the parts are more universal and will be more readily available and cheaper than hydroboost parts in the future.
