Bolt size for C5 brake adapter plates? - ZR-1 Net Registry Forums

GSJoe · 07-28-2012

My friend and I are about to upgrade his 91 ZR-1 brakes to C5 calipers, rotors, etc. He purchased some used calipers and caliper brackets which are now clean and ready to install. He also got some new adapter brackets, but they did not come with hardware. My question, then, is what size bolt do we get to hold the adapters to the spindles? It looks like the adapters are drilled and tapped for M14X2.0x?? Yup, we don't know the length. From pictures I've seen, these bolts are usually allen head and grade 10.9. Before I go to the friendly nut, screw and bolt store in our area, however, I need to know how long should the bolts be that I ask for. Please help if you know. Thanks.

WVZR-1 · 07-28-2012

http://forums.corvetteforum.com/c4-t...with-pics.html

Try these install instructions with "snap-shots"!! There are a couple of different style adapters out there I believe so you need to make sure yours are very similar to these. Good luck! There's nothing that says "these are what you need"!

ZZZZZR1 · 07-28-2012

Quote:

Originally Posted by WVZR-1

http://forums.corvetteforum.com/c4-t...with-pics.html

Try these install instructions with "snap-shots"!! There are a couple of different style adapters out there I believe so you need to make sure yours are very similar to these. Good luck! There's nothing that says "these are what you need"!

Excellent! Thanks for posting... We are doing another C5/C6 brake upgrade next weekend.

David

A1990 · 07-29-2012

Quote:

Originally Posted by ZZZZZR1

Excellent! Thanks for posting... We are doing another C5/C6 brake upgrade next weekend.

David

Excellent newsletter article...hint, hint

ZZZZZR1 · 07-29-2012

Quote:

Originally Posted by A1990

Excellent newsletter article...hint, hint

Point taken!

David

XfireZ51 · 07-29-2012

Dave,

Do the C6Z calipers use the same adapters as the C5? I'm thinking of selling my Brembos and going w the Z brakes/rotors.

VetteMed · 07-29-2012

Quote:

Originally Posted by XfireZ51

Dave,

Do the C6Z calipers use the same adapters as the C5? I'm thinking of selling my Brembos and going w the Z brakes/rotors.

The C5 and C5Z and I think the base C6 use the same adapters. The Z51, ZO6, and other high performance C6 packages require different adapters.

XfireZ51 · 07-29-2012

Quote:

Originally Posted by VetteMed

The C5 and C5Z and I think the base C6 use the same adapters. The Z51, ZO6, and other high performance C6 packages require different adapters.

Yeah the Z brakes are 14" rotors. Also been looking at CTS-V Brembos and Camaro Brembos. Wondering about the spindle bolt pattern on those.

VetteMed · 07-29-2012

I think there's some C4 folks on the other forum who have discussed the CTS-V swap. I don't recall specifics.

efnfast · 07-30-2012

Can you do the C5 upgrade with the stock rims on my 90?

07-28-2012	#1
GSJoe Join Date: Jul 2011 Location: Charlotte, NC Posts: 135	Bolt size for C5 brake adapter plates? My friend and I are about to upgrade his 91 ZR-1 brakes to C5 calipers, rotors, etc. He purchased some used calipers and caliper brackets which are now clean and ready to install. He also got some new adapter brackets, but they did not come with hardware. My question, then, is what size bolt do we get to hold the adapters to the spindles? It looks like the adapters are drilled and tapped for M14X2.0x?? Yup, we don't know the length. From pictures I've seen, these bolts are usually allen head and grade 10.9. Before I go to the friendly nut, screw and bolt store in our area, however, I need to know how long should the bolts be that I ask for. Please help if you know. Thanks.

07-28-2012	#2
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: Bolt size for C5 brake adapter plates? http://forums.corvetteforum.com/c4-t...with-pics.html Try these install instructions with "snap-shots"!! There are a couple of different style adapters out there I believe so you need to make sure yours are very similar to these. Good luck! There's nothing that says "these are what you need"! Last edited by WVZR-1; 07-28-2012 at 09:27 PM.

07-29-2012	#6
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: Bolt size for C5 brake adapter plates? Dave, Do the C6Z calipers use the same adapters as the C5? I'm thinking of selling my Brembos and going w the Z brakes/rotors. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

07-29-2012	#9
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: Bolt size for C5 brake adapter plates? I think there's some C4 folks on the other forum who have discussed the CTS-V swap. I don't recall specifics. __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)

07-30-2012	#10
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,492	Re: Bolt size for C5 brake adapter plates? Can you do the C5 upgrade with the stock rims on my 90?