C5 master with hydroboost?

[csouth]

I'm in the process of finishing up my brake setup, acquiring parts and such. I have C6Z06 calipers fr\rr, Kore3 lines, Wilwood adjustable prop valve\dist block combo with Astro Van Hydroboost. I do have a C3 master cylinder, but I hate the dated look. I know most recommend the 1 1/8 of bore size, but will the C5 with 1" bore work? It was orginally a drum\drum car, so would a replacement of the brake lines be recommended? Any feedback would be greatly appreciated.

[andrewb70]

I'm in the process of finishing up my brake setup, acquiring parts and such. I have C6Z06 calipers fr\rr, Kore3 lines, Wilwood adjustable prop valve\dist block combo with Astro Van Hydroboost. I do have a C3 master cylinder, but I hate the dated look. I know most recommend the 1 1/8 of bore size, but will the C5 with 1" bore work? It was orginally a drum\drum car, so would a replacement of the brake lines be recommended? Any feedback would be greatly appreciated.

I think the C5 MC has metric "bubble" flares. Going to the 1" bore MC will increase line pressure, and also increase pedal travel. I don't know how much, but some. Look into a 1998 S-10 MC. They have standard flare ports and I believe Raybestos makes a version that has the ports on the left side.

Andrew

[csouth]

I think the C5 MC has metric "bubble" flares. Going to the 1" bore MC will increase line pressure, and also increase pedal travel. I don't know how much, but some. Look into a 1998 S-10 MC. They have standard flare ports and I believe Raybestos makes a version that has the ports on the left side.

Andrew

I knew the flares were different, but I'll have to make some custom lines going from the Master to the prop anyway so i figured I'd open up my options. I'll look into the S-10 MC also and see if its doable.

Thanks,

Chris

[csouth]

Andrew, wouldn't that be metric too?

[andrewb70]

Andrew, wouldn't that be metric too?

I don't believe that it is.




Give Hydratech a call. Jim is the one that mentioned this MC to me a long time ago. It is the same one that DSE uses on their booster kits. Tobin might know the part number as well.

Andrew

[csouth]

I don't believe that it is.

Give Hydratech a call. Jim is the one that mentioned this MC to me a long time ago. It is the same one that DSE uses on their booster kits. Tobin might know the part number as well.

Andrew

Made the call. You're right, the 1" bore does result in more pedal travel. Jim also said that it will make the brakes EXTREMELY touchy. I think I will just stick with the MC I have since I don't know of an inexpensive MC that looks ok and fits the 1 1/8" recommended bore. I'm not paying $200 for Wilwood right now. Thanks for the help

[Hydratech®]

Here is a 1997 Savanna 1500 1 1/8" non QTU (quick take up) standard twin piston MC with standard old school brake line flare connections. Some GM QTU MC's have a very large rear register size due to having a high volume third MC piston in the rearmost area of the MC, and will not fit due to how large the rear register is.

http://www.raybestos.com/wps/portal/...ductId=1155735

NOTE: REAR PORT = FRONT BRAKES / FRONT PORT = REAR BRAKES on this particular MC.

[csouth]

Thanks Paul. This is much better than the look of the C4 master.

[andrewb70]

Here is a 1997 Savanna 1500 1 1/8" non QTU (quick take up) standard twin piston MC with standard old school brake line flare connections. Some GM QTU MC's have a very large rear register size due to having a high volume third MC piston in the rearmost area of the MC, and will not fit due to how large the rear register is.

http://www.raybestos.com/wps/portal/...ductId=1155735

NOTE: REAR PORT = FRONT BRAKES / FRONT PORT = REAR BRAKES on this particular MC.

Paul,

What's the PN of the S-10 MC with the ports on the left side? I remember you talking about it when I visited a few years ago for Run to Music City.

Andrew

[Apogee]

Paul,

What's the PN of the S-10 MC with the ports on the left side? I remember you talking about it when I visited a few years ago for Run to Music City.

Andrew

Andrew, are these the ones you're thinking of? Late 90's, early 2000 S-truck master cylinders, just opposite side ports for left versus right hand drive applications.

GM 89056528 MASTER CYLINDER, 1" BORE, ALUMINUM, RIGHT SIDE PORTS (1/2-20 & 9/16-18 inverted flare)
GM 89056529 MASTER CYLINDER, 1" BORE, ALUMINUM, LEFT SIDE PORTS (1/2-20 & 9/16-18 inverted flare)

Tobin
KORE3

[csouth]

I pulled the trigger on the MC that Paul listed above.

[andrewb70]

Andrew, are these the ones you're thinking of? Late 90's, early 2000 S-truck master cylinders, just opposite side ports for left versus right hand drive applications.

GM 89056528 MASTER CYLINDER, 1" BORE, ALUMINUM, RIGHT SIDE PORTS (1/2-20 & 9/16-18 inverted flare)
GM 89056529 MASTER CYLINDER, 1" BORE, ALUMINUM, LEFT SIDE PORTS (1/2-20 & 9/16-18 inverted flare)

Tobin
KORE3

Those are the ones!

Andrew

[csouth]

Andrew, are you running power or manual brakes?

[andrewb70]

Andrew, are you running power or manual brakes?

I am running manual brakes with a 15/16" bore MC. I wish there was a nice, aluminum, OEM style manual MC available. I really like the ones that Tobin posted, but they are intended for power application and lack the deep hole for the pushrod. It should work nicely for your hydroboost setup...

Andrew

[csouth]

I am running manual brakes with a 15/16" bore MC. I wish there was a nice, aluminum, OEM style manual MC available. I really like the ones that Tobin posted, but they are intended for power application and lack the deep hole for the pushrod. It should work nicely for your hydroboost setup...

Andrew

I already ordered th MC Paul from Hydratech posted in the link. When Jim@ Hydratech and I talke, he agreed with you that I would have more pedal travel from the 1" bore master. he also said when the brakes kick in you better hold on! I remember talking to Tom Farrington at Motor State last year and he said his hydroboost would put you into the dashboard, so he removed it. I wonder if it was because of a small bore master?

[andrewb70]

I already ordered th MC Paul from Hydratech posted in the link. When Jim@ Hydratech and I talke, he agreed with you that I would have more pedal travel from the 1" bore master. he also said when the brakes kick in you better hold on! I remember talking to Tom Farrington at Motor State last year and he said his hydroboost would put you into the dashboard, so he removed it. I wonder if it was because of a small bore master?

I've never driven a car with hydroboost brakes, so I don't know how they "feel." I know that my manual brakes have a very linear feel to them. The harder you press on the brake pedal, the more brake force is being applied at the calipers. My GF has a 2002 VW Jetta 1.8T. Her brakes annoy me to no end. For the first bit of pedal travel there brakes are mushy, then all of a sudden they grab like crazy. There is very little correlation between pedal travel, effort, and what the calipers seem to be doing. It feel like my foot is completely disconnected from the calipers, whereas with my manual brakes, I feel like my foot is working the rotors directly. I can't explain it any other way...Hope it makes some sense..

Andrew

[csouth]

I've never driven a car with hydroboost brakes, so I don't know how they "feel." I know that my manual brakes have a very linear feel to them. The harder you press on the brake pedal, the more brake force is being applied at the calipers. My GF has a 2002 VW Jetta 1.8T. Her brakes annoy me to no end. For the first bit of pedal travel there brakes are mushy, then all of a sudden they grab like crazy. There is very little correlation between pedal travel, effort, and what the calipers seem to be doing. It feel like my foot is completely disconnected from the calipers, whereas with my manual brakes, I feel like my foot is working the rotors directly. I can't explain it any other way...Hope it makes some sense..



Andrew

I've never driven a car with hydroboost either, but I did try the manual brakes. Tom let me take his car around the lot so i could see what it felt like before I acquired anymore parts to complete my hydroboost setup. I know what you mean by being "connected" to the brakes. I didn't like working that hard to stop the car though...lol

[andrewb70]

I've never driven a car with hydroboost either, but I did try the manual brakes. Tom let me take his car around the lot so i could see what it felt like before I acquired anymore parts to complete my setup. I know what you mean by beinf "connected" to the brakes. I didn't like working that hard to stop the car though...lol

Do you know what size bore MC Tom is running?

Andrew

[csouth]

Do you know what size bore MC Tom is running?

Andrew

I want to say I read 15/16ths

[andrewb70]

I want to say I read 15/16ths

That's the same size as mine, but I think Tom is running 13" rotors and C5 calipers. I have 14" rotors and Z06 calipers. The increase in rotor size increases the torque applied to the wheels, so less pedal effort is required to achieve good braking.

Andrew