C4 Brake Upgrades - Info Please
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Melting Slicks
Joined: Apr 2000
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From: Canada
C4 Brake Upgrades - Info Please
This again, is for an 86. For those who have done a brake upgrade, I'd appreciate some feedback. On the rear brakes, did you replace the emergency drum brake? Or I guess I should ask if U also upgraded the em. brake to a newer style. I guess the newer ones just work on a disc. I'd be interested in any info or opinions. Baer, GM, or what? Thanks in advance.
Racer
Joined: Jul 2002
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From: Aptos CA
Re: C4 Brake Upgrades - Info Please (Trixie*)
Since no one answered, I will suggest that you do a search here for brakes, brake upgrade, etc. Look in this forum and general and product reviews. There is a lot of information. Then you can ask a more specific question if necesssary.
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From: Almost all Skyline Cruises Vettes at Waterside 1-5
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Re: C4 Brake Upgrades - Info Please (Trixie*)
:cheers: Many folks don't mess with the rear brakes other than to install a new roter. The rear brakes are, I believe, all 12" single piston, atleast from 88 up and I believe back to the 84's as well. C5 is 12" single piston as well.
C5 roters are thicker.
Most people go to either the J55 (C4) 13" brake or the C5 13" brake on the front.
You will need 17" wheels for either one of these. I have done the C5 deal on mine, so if you have any questions I will be happy to try to answer
:seeya
:steering:
C5 roters are thicker.
Most people go to either the J55 (C4) 13" brake or the C5 13" brake on the front.
You will need 17" wheels for either one of these. I have done the C5 deal on mine, so if you have any questions I will be happy to try to answer
:seeya
:steering:
Drifting
Joined: Apr 1999
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From: Middletown New Jersey
Re: C4 Brake Upgrades - Info Please (Trixie*)
I did the GS brake upgradee on the front, left the rear stock and added the brake bias spring from Doug Rippie and I'm very pleased with my braking performance at this point.
Team Owner
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Re: C4 Brake Upgrades - Info Please (Trixie*)
You have to get 17" wheels, and buy a set of outrageously priced adapters to make a C5 brake upgrade (Electrodynamics sells them).
I'm going to do the C5 upgrade on my 86, and install the DRM bias spring, but otherwise leave the rears alone for the moment.
Maybe later when my rich uncle gets out of the poorhouse, I'll do a complete Baer or Brembo upgrade for the whole car.
I'm going to do the C5 upgrade on my 86, and install the DRM bias spring, but otherwise leave the rears alone for the moment.
Maybe later when my rich uncle gets out of the poorhouse, I'll do a complete Baer or Brembo upgrade for the whole car.
Drifting
Joined: Dec 2000
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From: Sarasota FL
Re: C4 Brake Upgrades - Info Please (vader86)
"You have to get 17" wheels, and buy a set of outrageously priced adapters to make a C5 brake upgrade (Electrodynamics sells them). "
After your next brake service you will make up the adaptor price due to the cheaper pricing on the C-5 parts. Better stuff, cheaper price, Go figure?
I have the C-5 stuff in my car and it's the best bang for the buck out there.
After your next brake service you will make up the adaptor price due to the cheaper pricing on the C-5 parts. Better stuff, cheaper price, Go figure?
I have the C-5 stuff in my car and it's the best bang for the buck out there.
Instructor
Joined: Dec 2002
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From: Las Vegas NV
Re: C4 Brake Upgrades - Info Please
Isn't it true that you not only need 17" wheels, but not sawblades or salad shooters? I also believe that you can have the adapter fabbed for you for much less than Electrodynamics charges as a few people have mentioned that around here.
MF
MF
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Re: C4 Brake Upgrades - Info Please (matt fury)
Isn't it true that you not only need 17" wheels, but not sawblades or salad shooters? I also believe that you can have the adapter fabbed for you for much less than Electrodynamics charges as a few people have mentioned that around here.
MF
MF
First, adapters (C%) are available for a lot less money...you need to discreetly ask around, a lot of guys have had them made at local machine shops. I hear DRM has them cheaper and there was a vendor at CI IV, in the first trailer on the right, who had them for $125.00, and
second, I have never read it or heard it, but I do believe from my observation of my set up, therefore I could be wrong, that the C5 brakes might require c5 wheels. the calipers come very close to the spokes on my y2k wheels
:seeya
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From: No more yankee my wankee, the Donger is tired!
Re: C4 Brake Upgrades - Info Please (jackdaroofer)
second, I have never read it or heard it, but I do believe from my observation of my set up, therefore I could be wrong, that the C5 brakes might require c5 wheels. the calipers come very close to the spokes on my y2k wheels
C5 rims are not required.
Melting Slicks
Joined: Apr 2000
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From: Oviedo FL
Re: C4 Brake Upgrades - Info Please (Trixie*)
Racer
Joined: Jul 2002
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From: Aptos CA
Re: C4 Brake Upgrades - Info Please (Jeffvette)
A molds or another AFS style 5 spokes. Or most aftermarket rims will fit. Saw blades and salad shooters need spacers to work with the C5 package.
Meanwhile, are my 2 piece 90's "sawblades or salad shooters"? Oh, and I would love to have someone who really knows tell me whether C5 calipers fit these rims. I have read that they do - I have read they don't. No guesses or third-hand info, please. Thanks.
Melting Slicks
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From: Oviedo FL
Re: C4 Brake Upgrades - Info Please (Skippy Stone)
Hey, if you like your "salad shooters" then more power to you. I've had my car for over 8 years now and have had the AFS A-Molds on them for the last 6 years. Personally, I like the look.
As for whether or not the C5 calipers will work, I cannot tell you. There are a number of people on here who are using them however. I'm sure you can search the archives to get the answers you are looking for...
Mike
[Modified by luvmy92, 10:24 PM 5/31/2003]
As for whether or not the C5 calipers will work, I cannot tell you. There are a number of people on here who are using them however. I'm sure you can search the archives to get the answers you are looking for...
Mike
[Modified by luvmy92, 10:24 PM 5/31/2003]
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From: No more yankee my wankee, the Donger is tired!
Re: C4 Brake Upgrades - Info Please (Skippy Stone)
Sawblades or salad shooters? :nono: Well, while everyone is running around buying 5 spoke late zr1, gs, c5, rims that look like every other suv, supra, honda civic rim, some vette owners have rims that go with their year of car. This makes them look unique. Star patterns have been around since the model T. yawn: Boring.
Meanwhile, are my 2 piece 90's "sawblades or salad shooters"? Oh, and I would love to have someone who really knows tell me whether C5 calipers fit these rims. I have read that they do - I have read they don't. No guesses or third-hand info, please. Thanks.
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Re: C4 Brake Upgrades - Info Please (luvmy92)
Hey, if you like your "salad shooters" then more power to you. I've had my car for over 8 years now and have had the AFS A-Molds on them for the last 6 years. Personally, I like the look.
As for whether or not the C5 calipers will work, I cannot tell you. There are a number of people on here who are using them however. I'm sure you can search the archives to get the answers you are looking for...
Mike
[Modified by luvmy92, 10:24 PM 5/31/2003]
As for whether or not the C5 calipers will work, I cannot tell you. There are a number of people on here who are using them however. I'm sure you can search the archives to get the answers you are looking for...
Mike
[Modified by luvmy92, 10:24 PM 5/31/2003]
I went for the y2k wheels for three reasons:
1] My 88 17" wheels were just too much of a PITA to keep clean even though I invested probably a hundred hours in sanding and polishing, and
2] The look is different...not saying better, that is opinion, but it does change the looks of the car
3] I believe, can't prove, therefore MHO, that C5 brakes work better with C5 Wheels. When GM did the design, they took heat removal and brake cooling into consideration.
I can tell you this, after a run, I can feel more heat emanating from the wheels than I could before.
I also agree with others who have posted about the proportioning spring. If you add that, I don't think you have to modify or change the rear brake set=up
Just my HO
:seeya
:steering:
Racer
Joined: Jul 2002
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From: Aptos CA
Re: C4 Brake Upgrades - Info Please (luvmy92)
Hey, if you like your "salad shooters" then more power to you. I've had my car for over 8 years now and have had the AFS A-Molds on them for the last 6 years. Personally, I like the look.
As for whether or not the C5 calipers will work, I cannot tell you. There are a number of people on here who are using them however. I'm sure you can search the archives to get the answers you are looking for...
Mike
[Modified by luvmy92, 10:24 PM 5/31/2003]
As for whether or not the C5 calipers will work, I cannot tell you. There are a number of people on here who are using them however. I'm sure you can search the archives to get the answers you are looking for...
Mike
[Modified by luvmy92, 10:24 PM 5/31/2003]
:cheers:
Instructor
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From: Greenville TX
Re: C4 Brake Upgrades - Info Please (Trixie*)
Haven't done the upgrade because according to published brake tests, a J55 equipped C4 has virtually the same braking performance as a C5 for one time stops. I don't know if anyone has done fade tests of the two systems.
The C5 calipers have bigger pistons so you would get lower pedal effort, and that is worth something.
The C5 calipers have bigger pistons so you would get lower pedal effort, and that is worth something.
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Re: C4 Brake Upgrades - Info Please (Skippy Stone)
e
I hope I will get the right info from the actual manufacters on Monday. But that depends on who answers the phone. Just like here.
:cheers:
I hope I will get the right info from the actual manufacters on Monday. But that depends on who answers the phone. Just like here.
:cheers:
It's not my intention to create a flamable situation here, but since there are people who have actually done the upgrades responding to this post and you apparently have not, you might want to avoid "name calling" such as "lawn edgers" and contribute to the body of knowledge more positively.
That's just MHO! I will contact my manufacturer tomorrow at church and see what he says :blueangel: Hope the right angel answers the phone :blueangel: :D
:seeya
:steering:
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Re: C4 Brake Upgrades - Info Please (rcdk)
Yuk, has this turned into a messy thread. Lots of mis-information, and naive supposition.
FYI, larger pistons in a caliper adapted to a system with a master cylinder designed for smaller diameter pistons yield a long pedal. Not real fun.
FYI, larger pistons in a caliper adapted to a system with a master cylinder designed for smaller diameter pistons yield a long pedal. Not real fun.
Instructor
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From: Mesa AZ
Re: C4 Brake Upgrades - Info Please (h rocks)
I just did a brake upgrade on my '94 that I'm very happy with. I went to a junkyard and got Grand Sport (black with 'corvette' in silver letters) calipers and 13" GM rotors for $250. I also replaced all the stock rubber lines with Goodridge braided stainless steel lines.
The GS calipers bolted right on to my steering knuckles with no adapters necessary. They fit under my OE "sawblade" 17" wheels, barely. The pads that were in the calipers appear to be OE. They are very thick, and are performing well, so I'm sticking with 'em.
I'm very happy with the performance improvement, which is most noticable the faster you are stopping from, and the simplicity and low cost of the upgrade compared to what the catalog houses offer. Hope this helps. Jeff
The GS calipers bolted right on to my steering knuckles with no adapters necessary. They fit under my OE "sawblade" 17" wheels, barely. The pads that were in the calipers appear to be OE. They are very thick, and are performing well, so I'm sticking with 'em.
I'm very happy with the performance improvement, which is most noticable the faster you are stopping from, and the simplicity and low cost of the upgrade compared to what the catalog houses offer. Hope this helps. Jeff
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Re: C4 Brake Upgrades - Info Please (jz94)
I went with the Baer Eradispeeds...front rotors, stainless steel lines, calipers, and rear rotors. All slotted and cross drilled.
[Modified by 95AquaC4, 8:16 PM 6/1/2003]
[Modified by 95AquaC4, 8:16 PM 6/1/2003]