cc 82Z-28

iTrader: (7)

Well, I've been researching the swap over to the 4th gen master cylinder and have a few questions. First, the master cylinder that was on my 82 Z-28 hasn't got metric threads so since I am also converting to rear discs the new GM proportioning I got from Ed a while back is the correct unit for 4 wheel disc which means the new master cylinder that I am going to use from a 2002 Camaro and the valve will be metric, correct? I already have C-5 front discs installed and am planning all new lines front to back, for those of you have done this conversion, were you able to create new lines or for the fronts or did you use lines from a manufacturer? I need to create custom lines for the front due my headers are way too close to the factory brake lines and just boil the fluid. I have a new steering shaft upgrade that I got from a board member here to install for more room since the plastic cover over the shaft will not be there. I am pulling the booster to clean and paint it since it is a mess but still works fine and I don't want to get into trying to make sure the rod length is correct if I change the booster to a different one, will this work ok with the 4th gen master cylinder? What about the bore size, are they different between 82 versus the 2002 ? Everything I've read says it will but I am making sure before I go too far with this and I like the look of the 4th gen unit with the one cap which will make a little room for me. James, I know you have a lot of knowledge about this stuff, any tips or tricks you can give me? This is whole new territory for me and looking through bifocal glasses can be a real pain for sure, I'm glad I have my lift for raising and lowering the car so I can into areas that are normally hard. Sorry for the long post, just want to include as much info as possible for and tips and help while doing this. Thanks to all who chime in.

Berlyn0963

iTrader: (4)

bump

Im also curious as i have a 4th gen master 2002 ready to install but i have no clue as where to start. someone please provide me with a little information
thanks

cc 82Z-28

iTrader: (7)

I have a 4th gen master cylinder coming from Summit, it is one for the V-8's model years 98-02 model years. The brake line kit is for the 86-92 3rd gens which have the metric fittings that will now be installed with the m/c and since I already have the C-5 brakes on the front that will make things good. I am reusing my power booster since there is nothing wrong with it other than a cleaning and some paint to make it look better and the 4th gen m/c will bolt up. I also have the new GM prop valve for 4 wheel discs so that is taken care of as well. I am installing the PBR setup with aluminum calipers and the correct new lines for the rear as well, so the brake lines will be new front to rear. The lines are from Right Stuff bought through Summit since the price was cheaper than from the manufacturer. While I have the headers off and wrapping to bring under hood heat down, I bought the new steering shaft upgrade and that is good upgrade to do. One thing about it, when I took the m/c off and the steering shaft out, it allowed me to pull drivers side header up and out instead of down under and not having to tilt the engine up to get it out from under. I just did as much reading of previous posts of others trials and tribulations and hopefully all will go together ok without too much drama. I still need to use something to seal up the new lines from corrosion before installing, I'm thinking of the product called Sharkhide, looks interesting and easy to use. So, that's where I'm at, I will keep you posted as to how it goes.

Tibo

iTrader: (15)

There was a great thread about swapping to the fourth gen master cylinder and booster with wonderful pics by Fueled Soul. Do a quick search. I have a complete brake system off of a fourth gen (LS1) car and am enjoying it. My Camaro is 92 and the LS1 master cylinder uses the same size connections. The LS1 master cylinder bolts up fine to a thirdgen power booster or of course the fourth gen. The Power brake booster from a LS1 car bolts up fine to a thirdgen car, I didn't make a single adjustment or slot/ream out any hole. The four mounting studs were a hair shorter but it doesn't matter. The studs for the LS1 booster have a different thread pitch/size than a thirdgen so you will need to correct size. The LS1 master and booster are each shorter than the thirdgen but it is unclear weather or not there is a "performance" gain, I personally doubt it. If, and I mean if, there is a performance difference it would be small enough to the point that one would be hard pressed to tell. The reservoir on the LS1 cars does offer the advantage that is baffled like a gas tank or oil pan. Looks like the brake fluid would be kept from sloshing around as much. The LS1 master does use ISO bubble type flares as my thirdgen's did.

NemeSS-TyranT

iTrader: (1)

on the same topic,
i am also looking to instal the master cylilinder/fluid reserve on my 91 rs.
i want to use the stock 3rd gen booster with the 4th gen mc/fluid reserve. it bolts right up physically, i can confirm. it is currently bolted/mocked up on my stock 3rd gen booster.
however, im not sure it if will operate correctly.
and also my 91 rs came with rear drum brakes. so im not sure if i need different brake prop valve?
in the front im going to use some afco aluminum calipers with cross drill/slotted 3rd gen specific replacement rotors.
rear, im using a moser 12 bolt also with 3rd gen c/d/s rotors and afco calipers.
any advice on the brake control parts i need?

Tibo

iTrader: (15)

I can't recall in my research before the swap if the thirdgen booster and fourth gen booster gave the same amount of travel into the master cylinder. My guess would be it would be fine. If you are changing the size of the rotors or going from drum to disc, you will need a different prop valve or an adjustable prop valve.

cc 82Z-28

iTrader: (7)

Making progress, have my new m/c and new booster as well, I got a replacement booster for the 82-92 to keep everything the same, the m/c looks good but I do have a question for those of you who have them, is the switch that is located at the center bottom of the m/c for brake warning light on these? My new prop valve which is for a 3rd gen with 4 wheel disc has the brake warning switch on it as the old prop valve I took off. Is this switch peculiar for the 4th gen units? All my old brake lines are off front to rear and I painted my new booster with a steel finish paint, looks good, as for the m/c, I am leaving it natural cast aluminum. I still need to paint the brake lines with something to keep corrosion in check, probably a silver paint as well. Once I wrap the headers, I need to start getting this thing back together now that the weather is nice.

NemeSS-TyranT

iTrader: (1)

u got a pn for that prop valve?
im also lookin to use my 3rd gen booster with 4th gen mc.
but i also have the 4th gen booster.
will the 4th gen booster pushrod work with the stock 3rd gen pedal.
still undecided which booster to use.
looking at it the plungers dont look the same on 3/4 boosters

cc 82Z-28

iTrader: (7)

Thought I'd give an update, new brake lines are installed front to rear using lines from Right Stuff, new 4th gen master cylinder mounted to the new booster, rear pbr's are installed and new e-brake cables are installed and adjusted and work great. Friend is coming over tomorrow morning so we can bench bleed the m/c and reinstall and then bleeding the whole system with Dot 5 fluid since my system is all new. Headers are wrapped and reinstalled to help keep heat away from brake lines. At one time I had the steering column unbolted and lying on the front seat so I could get the brake pedal shaft off and the booster unbolted. I also installed the new steering shaft which freed up some room for the lines to the m/c. Once the system is bled, time to put the tires back on and re-do the y-pipe before sitting back on the ground. It's been a long road but I finally see the light at the end of the tunnel so I can get cruising this summer. Here's a few pics.