hello everyone :)
what's new? well, basically first of all, I got a fantastic opportunity to upgrade my brakes. Specifically, I got this vacuum booster with the master brake cylinder from a turbo Celica for free, so I couldn't miss out on installing it because it will play a big role when I swap in a more powerful engine and four-piston calipers later! I know that it won't make much difference right now, but after driving with the new vacuum booster and master cylinder for several days, I noticed that my brakes are significantly quicker and firmer. Personally, I really like these changes, and this is all still on stock pistons. The response time is just instant, you barely put your foot down and the Mark stands firmly!
in future plans is to buy over time and swap in a full set of GTR or Celica brake calipers, depending on how it goes and what budget I have. By the way, who has any recommendations for the 81 model? What's more reliable? What can be bought and installed easier? And by price, what is cheaper to install? Thanks everyone in advance) here are a couple of photos with descriptions

here the new turbo vacuum booster with master cylinder is already in place

first thing I propped up my hood with a sturdy hammer to avoid hitting my head during work, since it was quite windy that evening, my friend and I thought: LET'S CALL IT A DAY!

first you need to disassemble the dashboard under the steering wheel so it's convenient to loosen 4 bolts (size 13). Personally, I used two extensions from my set, a socket wrench, and the appropriate size head. Some manage to tighten these bolts with an open-end wrench but personally, why buy a toolset if I'm not going to use it? Anyway, when all 4 bolts are removed and the brake pedal is disconnected by removing a fixing pin (a thin pin that holds the pedal rod in place), and removing the spring from the pedal. Once all four bolts are loosened and the pedal detached from the vacuum booster, which now moves freely forward-backward - we go under the hood, disconnect the hose marked 1, there you'll see an oil level sensor plug going to the dashboard, remove it along with a bolt securing the automatic cable with a size 10 screwdriver, carefully unscrew the pipe near numbers 2 and 3 (it's best to spray WD-40 on them beforehand for easier turning), mine came off without any problems)) additional note from AlexandrGX81:

tightening and tightening :)

on the right, numbers 3-13 show the new turbo vacuum booster. We moved the sleeves on the rods around as my pedal is slightly bent, so I was worried that the booster rod might hit it, so I switched to the shorter sleeve from the original 81 model. It's not necessary though, you can leave them in place. Next, we need to move the brake fluid reservoirs and keep the stock one since the turbo booster won't fit due to the strut tower cup

here are photos from different angles

here are photos from different angles

here are photos from different angles

swapping out the reservoirs is completely problem-free. Unscrew the bolt (marked on the left photo), lift up and remove the reservoir, repeat for the second vacuum booster, swap them, tighten the bolts, and with a flick of your wrist, the JZX100 vacuum brake booster becomes the booster for an 81 model :) it's simple

plug in the new vacuum booster into its place) don't forget to put on a paper gasket (it serves as a barrier between the metal booster and the car body)

assemble everything back together in reverse order :) 1 plug in the hose, fasten with a clip 2 bolt that holds the cable, adjust so it doesn't rub against anything while driving) 3 those are brake fluid level sensor wires, somewhere at the bottom you'll need to reconnect the connector. The pipes will need to be bent slightly and screwed into the master cylinder, both now screw from the side of the brake cylinder. Then put everything back in place in the cabin

:)

the next day was for bleeding brakes. Man, I got so tired cranking this jack, it was cold and windy too. Even though I have two hydraulic jacks, but I carry only this one — it takes up little space and is very compact, but you do need to put in some physical effort

I needed 2 cans of ROSDOT4 for a full bleed of the brakes, flushing the new brake fluid throughout the system. Old brake fluid was drained into an empty can and disposed of.

by the way, here's my work tool set :) really glad I bought it a year ago, since then it has helped me several times over. I try to buy only SERVIC-KEY brand tools for myself based on personal experience with their quality products. Highly recommend everyone to get at least this kind of set :) 108 items