C5 brake upgrade issue
Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
C5 brake upgrade issue
I ran in to an issue while upgrading the front calipers on my 92 this weekend and was wondering if anyone else has had this problem. I purchased the C5 adapter brackets from Pacific Northwest ZR-1, rotors and pads, and a used set of C5 calipers from the forum. When installing the caliper, the inside (engine side) of the rotor hits firmly against the caliper, to the point that you can't turn the rotor. It appears that the rotor needs to be spaced out about 1/4 inch to be centered inside the caliper. The brackets only fit one way, and I see no way to get the clearance needed without spacing out the rotor from the hub. Did I get some junk brackets, or am I missing something?
Le Mans Master
Joined: Aug 2005
Posts: 7,392
Likes: 216
From: Merritt Island, FL
Probably ought to check with the vendor to see if you got all the washers that are needed for mounting... of course, in the case of that particular vendor, it'll probably be weeks before you hear back... good luck.
Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
Yea...it took me 4 months to get these brackets. I'm wondering if he sent me the wrong ones. What do the brackets for the early C4's look like? Would this cause the offset that I am missing?
Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
Racer
Joined: Apr 2004
Posts: 250
Likes: 0
From: Binghamton NY
C5 brake upgrade issue
You will have a problem when trying to fit sawblades or other C4 wheels because my experience was the same...the caliper will hit the rim. You have the right kit but you will need to get spacers or upgrade your rims as I did.
Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
I have A molds on it, and they clear fine...no issues there from the front/side/back/etc. The issue is with the rotor contacting the caliper (the abutment bracket, actually) on the inside.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
He doesn't have that problem; the inside part of the rotor is hitting the inside of the caliper.
For the OP: did you get the washers with the custom brackets??
Installation instructions are here. There are pics of the adapter brackets in that link; do they look like what you received? IIRC, they are left and right specific.
For the OP: did you get the washers with the custom brackets??
Installation instructions are here. There are pics of the adapter brackets in that link; do they look like what you received? IIRC, they are left and right specific.
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Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
He doesn't have that problem; the inside part of the rotor is hitting the inside of the caliper.
For the OP: did you get the washers with the custom brackets??
Installation instructions are here. There are pics of the adapter brackets in that link; do they look like what you received? IIRC, they are left and right specific.
For the OP: did you get the washers with the custom brackets??
Installation instructions are here. There are pics of the adapter brackets in that link; do they look like what you received? IIRC, they are left and right specific.
Melting Slicks
Joined: Jul 1999
Posts: 3,214
Likes: 101
From: Decatur, Alabama
Use the caliper bracket washer from old c4 bracket behind the middle bolt (40mm bolt) so it doesnt hit the bracket then use bolt,washer,bracket,washer, nut on bottom larger bolt. You somehow you dont have the washers in the right places.
Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
But if I use the washers anywhere but BEHIND the rotor (to push the wheel/rotor out), it's going to push the caliper out more toward the wheel, and the rotor is already hitting the caliper. There is no way to space "back" the caliper so it centers on the rotor and doesn't hit it by using washers. Is that making any sense? It's like the adapter bracket needs to be thinner, or have an offset more toward the motor side of the car.
Melting Slicks
Joined: Jul 1999
Posts: 3,214
Likes: 101
From: Decatur, Alabama
I JUST went through this the past weekend, wish I could explain better via the board. Email me at corvette95@charter.net and I will give you my phone number and masybe I can help. You have to re-use your old caliper bracket washers. You DID get new C5 rotors didnt you?
Thread Starter
Instructor
Joined: Feb 2006
Posts: 100
Likes: 0
From: Panama City Fl
I JUST went through this the past weekend, wish I could explain better via the board. Email me at corvette95@charter.net and I will give you my phone number and masybe I can help. You have to re-use your old caliper bracket washers. You DID get new C5 rotors didnt you?
