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Brake job help

blockhead

Active member
Joined
Mar 3, 2006
Messages
36
Location
western new york
I am planning on doing the brakes ( replacing the rotors and pads ) on my 93 vert this summer. I have done brake jobs on many other cars but never on a vette. I dont want to spend major bucks on the job but want a quality job. Would appreciate any tips or recomendations on this. What rotors are the best? Slotted or holes ?Which pads perform better? Also plan on replacing shocks at the same time. Any suggestions on a good mid-priced shock? Any information w8ill be helpful!
 
The best thing you can do is to buy the factory shop manual from Helms. For a little over $100 or so, you get the same books that the GM techs use at a dealership. Go to www.helminc.com and order the set for your year.

For brake components, you can go with drilled/slotted rotors for street use and choose a pad that is low-dusting like a ceramic pad. Ceramic pads are not quite as good as OEM pads when cold but they will last and work fine when hot. If you are hard on brakes, go with generic replacement rotors. For a good street/autocross pad, consider Hawk HPS or EBC GreenStuff pads. Great bite when cold and very good braking once they get hot. They do dust more than stock pads.

This would also be a good time to do a complete fluid flush. The chances are the fluid is either original or old enough that it looks black. You can use a good DOT3 fluid like Castrol LMA, Valvoline SynPower or Ford MotorSports HD fluid. Takes about a quart to do a full flush.

The Corvette brakes are not difficult to do. The front calipers are held in place with a pin and C-clip. Pull the clip, slide the pin out and lift the caliper out and away. For the rears, there are two small bolts that hold the caliper to the guide pins. Remove the bolts and lift off the caliper.

There is a bracket attacked to the knuckles that has to be removed to pull the rotors. There are two large bolts for the front and two smaller bolts for the rears. Torque on the front bolts is 165 ft-lbs and the rears are 70. You will need a good-sized breaker bar or a impact wrench to pull the fronts but the rears are not difficult.

The bracket bolts have a factory applied threadlocker. While the manual says to discard the bolts after removal and use new ones, you can simply clean the threads and apply some Locktite BLUE and re-use them. Same for the guide pin bolts in the rear. Torque the front bracket bolts to 165 +/-15 ft-lbs and the rears to 70. The rear guide pin bolts are torqued to 26 ft-lb for the upper bolt and 16 ft-lb for the lower bolt.

If the hoses are original, consider new hoses while everything is apart. You might also consider "Speed-Bleeders for the calipers to make the job of bleeding brakes a one-man operation. They cost about $15 a pair and well worth it. Go to www.speedbleeder.com for info. You need p/n SB1010.

Shocks are pretty straight forward. The fronts can even be removed without raising the car. The rear shocks have a mounting plate attached to the underside of the frame rail so you have to pull the rear wheels to get to them. Many people like the KYB Gas-A-Just shock for about $30 at Summit Racing or Jeg's. OEM Bilsteins will run about $70-75 each depending on the vendor.

For the front shock bolts, torque the lower front bolts to 19 ft-lbs, the upper shock nut to 19 ft-lb. For the rears, tighten the upper shock retaining nut to 19 ft-lb, the upper bracket bolts to 22 ft-lbs and the lower mounting nut to 61 ft-lbs. When you tighten the lower shock nut, the suspension must be at ride height, so raise the control arm with a jack until the car just lifts off the jack stand pad.
 
blockhead said:
I am planning on doing the brakes ( replacing the rotors and pads ) on my 93 vert this summer. I have done brake jobs on many other cars but never on a vette.
You will find this to be simple with your professed experience.

I am a fan of stock parts for street use. This, from many brake jobs on my Bimmers, Corvettes and many sets of various pads.

Stock pads: softer, therefore more dust and quicker stops but equalized wear with respect to rotors. Quite decent life and arguably best stopping overall, for the street.

Harder pads: worse cold stopping, less dust and more wear on rotors, because they are harder.

I am probably the only (again) non-fan of slots. The slotted or drilled rotors allow hot gasses formed under severe braking to escape, yielding better performance. The slots I used (ATE power disks) delivered a pulsing pedal, with was only eliminated by machining the rotors down.
 
Like you've heard already, it's a pretty straight forward job to do and if you've done brake jobs before it should be a breeze. When I did mine, it was about 1 1/2 hours for new pads and rotors, taking my time and not trying to hurry to see how quickly I could do it.

There's lots of places with wide ranges of pricing for rotors, and as has been mentioned, you probably don't need drilled and slotted rotors unless you do auto-x or really hard braking on a course somewhere...that being said, I still went with them probably more for looks than anything else...lol. Do make sure though, and I think most are anyways, that you get the zinc plated rotors so that it'll stay nice and pretty anywhere that the pads don't touch the rotors...where the pads touch the rotors, they'll keep them shiny and clean.

Where I found mine from was
Speed Solution International Inc.
www.gripforce.com
17517 Fabrica Way Suite E
Cerritos, CA 90703


TEL: 888-988-4747(GRIP)
TEL: 714-228-9101
FAX: 714-228-0445




blockhead said:
I am planning on doing the brakes ( replacing the rotors and pads ) on my 93 vert this summer. I have done brake jobs on many other cars but never on a vette. I dont want to spend major bucks on the job but want a quality job. Would appreciate any tips or recomendations on this. What rotors are the best? Slotted or holes ?Which pads perform better? Also plan on replacing shocks at the same time. Any suggestions on a good mid-priced shock? Any information w8ill be helpful!
 
Brakes

Be careful what you pick for pads. If you pick the high end ceramic or kevlar pads they need heat to work. They are fine for competition use where you get the brakes up to temperature and keep them there. If you drive the car mostly on the street then go with an OEM equivalent pad. The reason is the regular pads grip at a much lower temp therefore you do not have any lag in braking distance in stop and go driving. The competition style pads react slower in stop and go use because they are not up to there operating temp. You could have a delay in stopping much as one car length at 40 MPH on cold brakes. That could cost you a nose job.:beer
 
The brakes on the Corvette are surprisingly easy. :D Like the others said before, it would also be a good time to totally flush the brake system. Wouldn't cost you but a few dollars and a little bit more time.

I went with regular Bosch pads on my car. I think they were about $40 or so and they're available at a lot of places. I've been pleased with what they do.
 
I have the Baer Eradi Speed drilled & slotted rotors ($500 for a set of 4). Very happy w/ performance. I suggest if you go drilled & slotted to spend the extra money on a good set. Don't go cheap. You won't be happy and you'll either spend the extra money later on a good set or go back to stock. I've heard all the nightmare stories about drilled & slotted rotors not performing up to expectations and I have no complaints.
 
I have 13 inch rotors (stock) on my 92 with the oem pads. I was very disappointed with their stopping power, (particularly at speed) and used this forum to search for new pads. I ended up going with EBC Red, on the stock 13 inch rotors, which has made a big difference. While it does not get real cold here, I have not had any problem with cold stops, but know they work even better after warm up.
 
While ceramic pads may work fine for a great majority of cars and general street driving, the use of a semi-metallic pad is preferred for high-performance or "spirited" driving like you see Corvette owners doing. Guess it depends on how you drive the car and if you want clean wheels all the time :D

As to drilled/slotted rotors, there are good ones and cheap ones. The cheapie drilled rotors are prone to cracking around the holes if these rotors are used for high performance use like track days or autocross events that have some high-speed sections. Once the rotor is cast, drilling will weaken the material around the hole. The expensive drilled rotors have the holes cast into the rotor and the holes are finished as part of the final process. These will survive much longer in extreme braking use, but the cost is will be high.

I use the cheap "white box" stock rotors on my 87 for track days. They may only last a few days with hard use, but they work fine and are very cheap compared to OEM or even the better name brands. I never resurface the rotors. Even the GM service manual states that resurfacing rotors should not be done as there is not a lot of extra material (thickness) on the rotor to take more than one resurfacing operation. Get one big gouge in them or leave a ridge on the edge of the rotor and they can't be safely turned down.
 
hi there c4 cruiser,
so do the semi-metalic pads put out less dust do they?as i want to keep my white dircetional rims to be kept cleaner if i can!
thanks
glen
sxyvet
australia
 
Semi-metallic pads will dust more compared to ceramic pads or even OEM pad compositions. But not all semi-metallic pads will dust as much as others. Once you get into high-performance and near-race level pads the amount of dust generated goes up dramatically.

I ran EBC GreenStuff pads on my 87 for the autocross season last year and I was pleasantly suprised to see that there was very little dust. They worked great on the street and compared in braking performance to the Hawk HPS pads with less dust. Excellent cold bite (when starting out in the morning) and as I got some heat into them, they really began to work. No squeal or vibrations.

I installed a set of stock rotors at the same time and didn't have to do anything other than make a half-dozen medium-hard stops from 40 to 0 and then let the brakes cool for a hour. That process beds the pads by transferring some pad material onto the rotor surface.

I did do one track day with the EBC pads and while dusting was heavy, I fully expected that due to the braking forces from high speeds. The wheels on my 87 are black so the dust was hardly noticable. But the pad life was not what I expected although the price was less than the Hawk HPS pads.
 

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