91Z28-350

I don't know what happened to the C5 thread, but here's a link to a site that has part numbers and a bit of detail about making the hub.

http://82lt1.cz28.com/brakes/brakes.html

There was more information in the thread, something about milling something about 1/32" but I can't recall what that is. I don't recall if bracket dimensions were posted either.

toddlsf

If anyone has any questions, just email me and I'll try to answer what I can. I had some part numbers wrong in the site, but I have corrected them now.
Todd

toddlsf

I know, there was a lot of info, but some of it is also covered in the C4 and LS1 brake threads. I'll post the pictures of the clearance problems with the IROC wheels later tonight.
Todd

toddlsf

I mocked up a C5 setup the other day so I could try fitting some IROC wheels. They didn't quite fit. I ground down the ribs on the caliper a little and that helped but not enough. The wheels rub where there is a ridge on the inside. I don't know if all wheels have this ridge. I am attaching a couple of pictures. Let me know if any other 16 inch OEM wheels have this.
Todd

toddlsf

front view

novass

iTrader: (1)

Todd,
I e-mailed you about the brackets.
Also, did you run into any problems once you got the conversion right? (like proportioning valve do it need changes?)

toddlsf

I didn't change my proportioning valve and everything seems to work great. My car is a 1982 4 wheel disc. I have 4th gen rear disc brakes on it. It stops on a dime right now. I guarantee I would have had trouble stopping at the dragstrip before, but I don't have any trouble now. I think I would have been pulling weeds out of the grill with the old brakes.
Todd

Neil

Hey Todd,

Very nice work! I will be doing the upgrade soon, but first I am deciding on what wheel to go with. With the ZO6 brake setup, is the offset chaged at all (in the front only)? I am wondering if I will still need wheel spacers if I switch to ZO6 rims, currently I have IROC wheels. I know I will definitely need spacers in the rear.

toddlsf

The offset only changes by the thickness of the rotor, which is about .250 inch. I wish it changed the offset to use Z06 wheels. I would buy a set right now, if I didn't have to use spacers.
Todd

novass

iTrader: (1)

Will the c5 setup clear 17" rims with out a problem? I was thinking of getting ROH ZS 17". The .25 inch offset might even help with the 9.5, because someone I read had problems with the inside of the rim rubbing against the tie rod end.


Do you know that the max diameter of the whole assembly?

Also I was not able to find this part on gmpartsdirect.com
Bolt (Bracket to spindle) 115081533

toddlsf

I don't know the diameter of the whole assembly. It's hard to measure something like that. I do know that it is just about the same size as the inside of an IROC wheel. A friend of mine has one of those "calipers" that measures wheel width. I might be able to use that to get an idea.

I know that it cleared my 17 inch cragars. That is all I know for sure. I guess as long as the wheel company says that it will clear the front of a 1997-up Corvette, you're fine. I did have to use a .125 inch spacer because the face of the caliper rubbed the inside of the wheel.

I had that part number wrong. It is actually 11508133.

Todd

PF Flyer

Todd, you have mail.

Having been involved in the C5-LT1 brake upgrade, I'll say you'll need 17" wheels to use this brake upgrade. With wheel deflection found during cornering there will need to be some room between the wheel and caliper, as well as caliperAnd as far as brake proportioning, I would'nt worry too much about it if you're running the 1LE rear calipers and rotors. (aluminum PBR calipers with 12" rotors)

Mike

toddlsf

As best I can measure the diameter of the setup is approximately 15 inches. That is at the smallest part of the caliper near the face of the caliper. But, that is where the rim is usually more narrow. The IROC wheels fit fine where the caliper gets bigger, but they rubbed at the smallest part of the caliper where the ridge in the wheel is.
Todd

ebmiller88

iTrader: (7)

Todd, sent you a PM.

Ed

ebmiller88

iTrader: (7)

OK, I may be pissed here. Per the LS1 thread, the caliper pictured below on the right is a LS1 caliper, correct? Problem is, it looks just like the "98 Vette" calipers I just got on this auction. Did I screw it up?

http://cgi.ebay.com/ebaymotors/ws/eB...ory=33564&rd=1

Ed

toddlsf

Ed,
I just looked at the auction and it looks like you bought some Camaro LS1 brakes.
Todd

Matt_91RSTPI

They will say "Corvette" on the outer edge if they are C5 calipers. Other than than and their casting process, there is no difference between the two calipers.

ebmiller88

iTrader: (7)

That's what I thought. I'll live with it, they'll work the same regardless of what is cast on the side of them. Looks like I'll take the LS1 brake ball and run with it.

Thanks guys.

Ed

89 Iroc Z

Ed,
You bought some camaro LS1 brakes. There are differences between the corvette and camaro calipers other then just the corvette name cast into it. The corvette calipers are made by pressure casting while the camaro calipers are made with just gravity casting. Also the corvette calipers have the reinforcement \ cooling ribs running the full length of the caliper while the camaro caliper only has them on the back. Also the corvette caliper has different abutment bracket, the mounting holes are closer together. Also as you probably know corvette rotors are 12.75 inches and the camaro rotors are 12 inches.

ebmiller88

iTrader: (7)

Funny...I compared the LS1 caliper carrier to Todd's C5 bracket and the holes lined up exactly, just those 2 holes.


Ed

89 Iroc Z

Thanks for letting me know. I do not know why I got that messed up.