C5 Front/LS1 Rears...Master Cylinder??

[Joey316G]

Hey I searched for this topic and found some stuff but looking for some opinions from people who might have the setup I have. I am putting together a brake system for my 69 Camaro. SO far I have LS1 F Body 12" rear setup complete and for the fronts I have C5 calipers with C6 Z06 14" rotors and KORE3 brackets. What Im wondering about is the master/booster combo. I am trying to decide between going with a 98-02 F body setup or going with the oem style power brake booster with the 67-76 Corvette manual master cylinder. I like the technology of the newer style parts but I also like the originallity of the older parts. Now I will say that I am leaning toward the OEM/Corvette setup. Is there anyone here running these with a similar setup? How do you like it? IS it enough for you? DO you wish you went the other way?...Let me also add that my car will have an LS1 and T56 setup. Now I know that I will have to do some fab work and some tubing fab witht he 4th Gen stuff. Thats not what Im concerned with. I am wondering about function and how you guy like the setup you have. Please let me know what your experiences with these items are. Thanks

[gearheads78]

Asking the same question a while back wanting to run manual brakes I ended up using a 77 Malibu master cyl. Its not on the road yet so I have no real world feed back.

-Richard

[68sixspeed]

I'm running a similar setup (C5 vette front, c4 vette rear) with a 92 vette master cylinder on a 9" dual diaphram booster with very good results. That master cyl is 15/16 vs the 1" bore c5 vette or even 70's vette master cylinder. I started with a 70's master cyl on a 7" dual diaphram booster, it was pretty stiff. The 15/16 master was better and I ran it that way for years with a vac. pump booster. With the 9" dual booster I don't need the vac. pump. If your motor has good vacuum the 7" or 8" dual diaphram should be fine. (I have a .700 lift cam on a small block.)

[claytonisbob]

I know Im bringing back an old thread, but I have the same question for a C6 twin piston front, LS1 rear disk setup in a Chevelle. I want to run a manual brake master cylinder. What size do you think would be appropriate (I'm wanting to say a 7/8", but I'm not sure)? What car would it have come in stock?

[GenPac]

I know Im bringing back an old thread, but I have the same question for a C6 twin piston front, LS1 rear disk setup in a Chevelle. I want to run a manual brake master cylinder. What size do you think would be appropriate (I'm wanting to say a 7/8", but I'm not sure)? What car would it have come in stock?

Off the top of my head, a late 70s malibu had a 7/8" bore master for manual apps, but... they had drum rears.

[claytonisbob]

Ok, it looks like 76-80 Monza's had 7/8" bore masters (Part # M1741 at autozone). It looks like they are shallow pocket on the piston. Is that what works best, or do I need to find one that has a deeper pocket? Going from vacuum booster, I have no idea.

[MrQuick]

this should work too...
https://www.pro-touring.com/forum/showthread.php?t=69682

[Randy67]

Ok, it looks like 76-80 Monza's had 7/8" bore masters (Part # M1741 at autozone). It looks like they are shallow pocket on the piston. Is that what works best, or do I need to find one that has a deeper pocket? Going from vacuum booster, I have no idea.

Use a master with the deeper pocket (and corresponding longer pushrod) so it doesn't fall out while driving. I am using a 1" 67-76 Corvette master cylinder with C5/LS1 brakes. It stops very well, but takes a bit of effort, but the HP+ pads help (more aggressive pads help). It works well enough while autocrossing, daily driving is no problem. A 7/8 or 15/16" master should stop a bit better with less effort but slightly more pedal travel.

[claytonisbob]

this should work too...
https://www.pro-touring.com/forum/showthread.php?t=69682

Whats the bore size on those kind of masters? Id imagine it was designed for a booster so it's also a shallow pocket? I have Hawk HP+ pads on the front. The rear pads I believe are oem replacements (IDK , they came with the calipers and rotors when I got them second hand).

I cant find a 7/8 master that has a deep pocket :(

[a67]

I cant find a 7/8 master that has a deep pocket :(

Here is the one I'm using with LS1 ft & rr's, manual:

1992 DODGE SPIRIT 3.0L 2972cc 181cid V6 MFI (3) SOHC
DORMAN M39736 Master Cylinder

Aluminum with plastic reservoir. Dimple is .725" deep, left hand 3/8"-24 I.F. ports.

Pictures on Rock Auto, along with a price that can't be beat.

Bob.

[claytonisbob]

https://static1.pt-content.com/images/noimg.gif
Source: RockAuto

Pretty slick looking master. Thanks everybody for your help. I'm going to give this DODGE master cylinder a try. (And to think I was getting away with mostly GM parts until now).

[69keith]

I'm using a 98 camaro mc and booster, works great with c5 front calipers and ls1 rears used adjustable prop. valve

[amargari]

I am running a C5 master and booster on my 2nd gen Camaro with C5 front brakes and LS1 rear discs. I am also using an prop block with the adjustable proportioning valve.

[srh3trinity]

Does anybody have pics of these setups? Do the Ls1 F-body and C5 Corvette masters/boosters fit without too much modification or taking up too much more space. How much do you have to do on the brake pedal side of things? I am looking at options for a second gen F-body. The brakes I have are C6 Z51's.

[amargari]

Does anybody have pics of these setups? Do the Ls1 F-body and C5 Corvette masters/boosters fit without too much modification or taking up too much more space. How much do you have to do on the brake pedal side of things? I am looking at options for a second gen F-body. The brakes I have are C6 Z51's.

Here is the write up on my site:

Fronts:
http://www.apiem.com/camaro/C5Brakes20081106.asp

Rear:
http://www.apiem.com/camaro/RearBrakesSuspension20090502.asp

http://www.apiem.com/camaro/RearBrakesSuspension20090503.asp

Parking Brakes and other:
http://www.apiem.com/camaro/Brakes20100330.asp

[srh3trinity]

Here is the write up on my site:

Fronts:
http://www.apiem.com/camaro/C5Brakes20081106.asp

Rear:
http://www.apiem.com/camaro/RearBrakesSuspension20090502.asp

http://www.apiem.com/camaro/RearBrakesSuspension20090503.asp

Parking Brakes and other:
http://www.apiem.com/camaro/Brakes20100330.asp

Great write up. That will be a lot of help.

[claytonisbob]

When you paint the rotors like that, does it scrub off pretty quickly after you use your brakes? Or are you painting them, and then having them turned?

[amargari]

When you paint the rotors like that, does it scrub off pretty quickly after you use your brakes? Or are you painting them, and then having them turned?

Funny that you mention that. I did the paint trick on my 98 Cobra and it worked fine. However; this time on my Camaro I wound up locking up my front pads to the rotors because of the paint. You can get away with a little overspray on the rotor surface where the pads contact but don't put too much on.

[claytonisbob]

I guess I'll just try to mask them off. Good to know though, I won't try to worry to much about getting the masking perfect.

[Pete68]

Im using all C5 on my 68 camaro, front and rear rotors and calipers and booster and master cylinder. Only thing stock are the hard brake lines. Works amazing, here is my write up:

https://www.pro-touring.com/forum/showthread.php?t=61780

[Skip Fix]

FWIW painting the mounting surfaces of rotors can give enough thickenss variation to change runout. I had painted some with thin high temp paint like that and when we went to turn them for a fresh surface they wobbled slightly on the brake lathe until we sanded off the paint on the mounting surface.Then it was true again.

[bochnak]

Source: RockAuto

Pretty slick looking master. Thanks everybody for your help. I'm going to give this DODGE master cylinder a try. (And to think I was getting away with mostly GM parts until now).




Is this dodge master a bolt on deal for a chevelle? Is the hole spacing for the firewall mounts the same?

[a67]

The mounting hole spacing is slightly narrower (maybe ~1/4") then the stock GM master I replaced. Since I made an adapter plate set up this didn't matter.

Actually, have the plans right next to me, I have the hole-to-hole C/L on the Dodge M/C as 3-3/16".

Bob.

[bochnak]

The mounting hole spacing is slightly narrower (maybe ~1/4") then the stock GM master I replaced. Since I made an adapter plate set up this didn't matter.

Actually, have the plans right next to me, I have the hole-to-hole C/L on the Dodge M/C as 3-3/16".

Bob.

Is there enough material on master to elongate holes?

[BulldawgMusclecars]

On an '83 Malibu we just finished, I used C5 calipers on the front and LS1 rear (late 4th gen F-body), and used the original Malibu quick-take-up master cylinder (per tobin's recommendation) and booster, with an adjustable valve. Worked great.