C6 Z06 brakes, Hydratech Booster, and Master Cyl. ?'s

[GinoRin]

Hey everyone,
I was just curious if anyone out there has used a hydratech booster with the C6 Z06 brakes yet? I am going to be doing this on my 87 Buick GN but I'd love to hear what you guys are using for master cylinders and whether or not you're using the brass GM distribution block in conjunction with this setup. Paul at Hydratech recommends a 1 1/8" bore size on the master, but NOONE makes an aluminum body/plastic resevoir master cylinder that I can find. All the 1 1/8" stuff is cast iron, and well, I think they're ugly. So I might be forced to move to a 1" bore like all the rest of the GM aluminum masters are. My questions are as follows:

1. For those running Z06 brakes, what did you use in the rear for brackets on a 8.5" 10 bolt GM rearend? Kore3?

2. For those running the Hydratech with an aluminum/plastic master, which one did you use, and why? How does it look, what does it cost?

3. If anyone is running the same setup I'm thinkin about, did you leave the brass distributiuon block in place, or dump it and move to a full adjustable setup?

Thanks in advance!

Gino

[John S]

Gino,
my application is close but not exactly like you are describing and if none of this pertains to you then I apologize.
I'm running C5 brakes in front and Baer discs in back of my 86 Monte SS with a hydratech unit. I am using the stock aluminum/plastic MC that came on my Monte. I am also using the original distribution valve with the modifications listed in the Baer manual as well as an adjustable proportioning valve for the rear.
I am not sure what the difference is between the C6 and C5 brakes or the C% rears and the baer but my system works extremely well.

[ZZ4Blazer]

I just got my set up running this week. Its on my s-10, which shares suspension with the g-bodies.

Anyhow, I have a hydra-tech booster from Paul, and followed his recommendations witht he 1 1/8" master. I spent the money for the Wilwood master. I did not want the huge cast iron master.

ATS tall spindles, C6 Z06 front brakes, 12" LS1 rear discs. Eventually will upgrade to the C6z rears.

I havent had the chance to drive the truck much, only bed the brake pads in, then to and from the alignment shop. Weathers not cooperating this week. Litterally, the high went from 75 on monday to 28 today.

Anyhow, I think the master might be too much for my combo. The pedal is very stiff, and theres little travel in it. Very hard to modulate the pressure. I like a good stiff pedal, but this is too much for my liking, and fear I wont be able to control it as Id like without having that pedal feel. I think I might try the 1" bore master, was just gonna make a post about it when I saw this one.

Granted it was 28 degrees on the way home today, but the front brakes were more than enough to overpower my tires. Didnt stomp it, but got aggresive with the pedal getting off the eway going back to my shop, and locked both front tires up immediately. Two huge clouds of smoke. those being BFG KDW 255/35/18"

[GinoRin]

ZZ4- Thanks, thats what I was looking for! I talked to Paul also and he told me he would recommend a 1 1/8, but I decided just to purchase the matching C6 Z06 master cylinder (which I think might be the same as the regular vette master) from GM. I think I paid just under $150 + shipping from Fred Beans. I'm pretty sure it's a 1" bore. Either way, the Z06 brakes work awesome on the vette chassis with that master cyl, so I'm going to give it a rip and see what happens. Unfortunately I dont even have my drivetrain dropped in yet, so it might be a few months before I get to test it. Kepp me posted on what you decide to do!

Thanks

Gino

[Widetracker]

Any update if the 1 inch works well with Hydroboost? Is it the same master on the c6 and the c6 z06?

Thanks

[GinoRin]

The C6 and C6 Z06 use the same master, yes. As far as whether or not the 1" master works, only time will tell. Probably 6 months before i get to test mine out.

[Takid455]

i plan on using a 1.25" off an astro van. alum/ plastic. this will eleviate the 'touchyness' and uncertain threashold limits of the 1.125" mc. this is based on comments and reviews. setup is c5 front and rears on a 78 T/A w/ astro HB. stock 79 4whl disk prop valve w/ adj. regulator for the rear. Not to take any credit away from anyone, but I'm a DIY guy. If I think I can do it, i'll give it a shot.

[hotrodf1]

Of all the hydroboosts and master cylinders out there, does a guy just expect that the dimensions on each will be such that the rod in the booster will always be the right length to go inside the master cylinder? What I mean is, does it matter which HB unit you pick to mate with a master cylinder, or do they all fit up the same?

Reason I'm asking: I'm having an issue with my setup, 93 pickup HB unit, 76 Vette power master cylinder. Almost seems like the HB rod isn't long enough to engage the master cylinder. Thoughts???

[newby]

hydratech is right on... dont bother with bores smaller than 1" especially with big brakes. 1 1/8 - 1 1/4. you wont have enough fluid volume/pressure on the stroke.

also if you dont want big cast pieces just find a complete unit from a newer vehicle ala 2500 hd trucks for example.

also... a little elbow greese never hurt anyone. take a big nasty cast iron piece, do alittle grinding on the edges, have your local powder coater put a good round of filler powder and a top color of your choice on there, then have it engraved and walla! cool custom pieces for cheap.


dont forget... hydro boost 'technology' is old as dirt. factory backed road race vette teams were switching to 7/8 and 1" hydros back in the late 60s b/c of excessive brake fade. this stuff is not as hard as everyone makes it out to be.