C6 GrandSport Brakes install

You better use that up Vacation that is, yeah the rust on my car sucks, but all I can do right now is sslap stuff on it to stop it or try at least.

Here is a pic of the rear in the car. and what it looks like with the caliper in the forward position.

pmgm said:

Nice.... I wonder how these compare to a Kore 3 or Bear brake setup...

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It is a Kore3 setup in most regards, I just didn't get the calipers, rotors and parking brake assembly from him to give other options to people, if you are talking the C5 caliper upgrade that Tobin puts together it is about the same in most regards, I just pieced everything together on my own. Don't get me wrong Tobin is an awesome guy and honestly if I had the money I would I just ordered the full thing from him, but if you add it up in getting everything from him:
Rear kit with parking brake $1692.00
Front Kit with hubs $1528.00

Total: $3220.00

Now the way that I did it, and to be honest I don't think that it can be done this cheaply again, but you never know.

• used 2010 Grandsport Calipers- $500.00 shipped with pads about 25 miles on them, well what I was told anyway
• Kore 3 B-Body Hubs- $ 329.00 plus shipping
• aftermarket cross drilled rotors- $250.00 shipped to my door
• Kore 3 front brackets and hardware- $85.00
• Kore 3 Rear Brackets and hardware- $105.00 plus shipping
• Machine work on rotors- $20.00 (but I know my machinist and he owed me)
• parking brake backing plates and shoes- $FREE (originals)
• parking brake cables- $40.00 (not really needed, but I figured why not.)
• all new brake lines and fittings- $100.00
• MCPV-1 CPP master cylinder (USED) - $100.00
• Total = $ 1529

As you can see I cut the number down quite a bit, I sold a bunch of stuff that I had and pretty much did this and the new wheels and tires for free

I am thinking about making a run of kits if there is going to be interest, but I wouldn't want to take business from Tobin, he helped me out greatly in this. The biggest thing that I was trying to figure out and save cost on was the parking brake assembly. He makes one but it is pricey, but very well engineered.

I don't know let me know if there is interest in a production run and I will see what I can do to make it happen.

Good question, thought about c-clip eliminators but couldn't figure out how to make them work. The axle float is there, it is very minimal. Talking .020 or less, pad knock back maybe present , but the only thing that it may require is a residual check valve to keep tension/fluid on the pistons or as it was told to me there maybe times that I would have to pump the brakes to get a full force stop. I have yet to drive the car yet, still buttoning things up, but I don't think that it is going to be that drastic as Tobin @ Kore3 would of mentioned this. The kit that he developed, which is essentially what I have with some things that I purchased separately and the use of the factory parking brake, doesn't eliminate the C-clip or anything like that. I guess I will just have to see what I come up with when I test drive it. With a fully adjustable proportioning valve in the new master cylinder, I am sure that I am going to have to tweak it a bit, but once dialed in it should be great.

I think that I saw a Baer kit or something where they add shims to the c clip to eliminate the float, maybe an option as well. I will have to post up my findings when I have them

Ok progress. After making all of the lines in my car I only had one fitting that was being a bastard and leaked a little bit, loosened it and tightened back done, I will have to go out and check it again today. Should be good though, system builds pressure nicely now after getting new master cylinder and pressure bleeding it. The CPP MCPV1 units, like I installed are notorious for being bastards to bleed, but what is cool with the MCPV it comes with a cap that is used for a remote reservior setup, so it has 1/8th inch fittings embossed into it, so I went to my local Lowes and made a pressure bleeder using this. Basically, purchased a 1 gallon garden sprayer, some 1/4 inch clear tubing, a pressure gauge and some fittings. For about 20 bucks I have a pressure bleeder for my set that works unbelievable. Pump it to about 10 psi, you shouldn't need anything over that and go to every bleeder and attach line to a bottle, crack bleed and fluid comes out, as easy as that. So much easier than anything else I have ever used. Plus the great benefit of this besides the cost is the fact the only thing that you have to do is make sure the pressure stay up a little, I think that I only pumped it up once, but I did inject fluid in to the lines and calipers to keep from having to bleed the system all that much more.

Anyway after all the bleeding, great pedal pressure in the air and all that, I will update further once I am able to drive it, that willl be sometime though. I have another large project coming in here shortly that is going to take up quite a bit of time.

I had purchased new parking brake cables from Mike @ hamilton and they are perfect, but when GM replaced the cables with some different number, they discontinued the equalizer (the place where you adjust the parking cable tension.) so I got a hold of Mr. Harper and he had a set, so I got the complete set from him. Guess what the parking brake works PERFECTLY

I will post up some pics here in a bit, I think that I am going to set it on the ground today sometime, just cause I want to see what the new rims are going to look like.

PRdeVille said:

Wow.
Big brakes for big cars.

More pics plz!
Awesome work man!!

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What other pictures would you like to see? Haven't driven the car yet, too much other stuff going on, was going to do more this weekend, but my dad decided to drop into town from South Carolina with no notice LOL. So that is on the back burner. Everything is in though, brakes are bled, may need one more bleed though. Remember I didn't reinvent the wheel on this install by any means, Kore3 built a kit and still does for that matter that you can buy tomorrow. I just did a little development on the rear aspect of the installation, to find another option for the parking brake and two move the calipers to the front of the axle as they are on a vette.

Here is a pretty good side shot of the car for you.