C5 Front Caliper in Rear
01-07-2012, 11:05 AM
#101
Melting Slicks
Member Since: Mar 2009
Location: Odessa FL
Posts: 2,300
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St. Jude Donor '10-'12-'13-'14-'15-'16-'17
[QUOTE=melvingregory;1579668305]
Parts used:
C5 front Calipers - no mods
NAPA Part # 83212A Disc Brake Hardware Kit
GM Caliper rebuild kit
C5 front brackets - modified for clearance.
C6 Z51 rear rotors - no mods
NAPA Part#38253 Brake hoses - 18 1/2" in length verus 16" stock
, OEM should work, but I didn't like the stress put the lines at the frame mount point. Plus, I wanted to replace hardware with new anyway being this car is a 1998 with 80,000+ miles on it.
My wheels are OEM C6Z06 off a 2008 Z06
front: 18 inch x 9.5 inch P275/35ZR18
rear: 19 inch x 12 inch P325/30ZR19
Performance? Braking appears somewhat better, but I didn't do the mod for performance per say, as I don't track or race the car so I would let those that do make the statements about that aspect of the conversion. Logic would say it should be better. I am not getting any errors on the DIC. I have probably put 10 - 15 miles on the car since Thursday night. I will be going on a run this sunday with others in the club and that will put about a 100 or so miles on the car.
Thanks for all the information. My question on performance was more in regard to any degradation or any issues. I am doing this more for the looks, but there were early discussions with concerns about having larger or equal size calipers and rotors in the rear. Let us know how the cruise goes on Sunday. PS did you have to use any spacers on the C6Z wheels?
Parts used:
C5 front Calipers - no mods
NAPA Part # 83212A Disc Brake Hardware Kit
GM Caliper rebuild kit
C5 front brackets - modified for clearance.
C6 Z51 rear rotors - no mods
NAPA Part#38253 Brake hoses - 18 1/2" in length verus 16" stock
, OEM should work, but I didn't like the stress put the lines at the frame mount point. Plus, I wanted to replace hardware with new anyway being this car is a 1998 with 80,000+ miles on it.
My wheels are OEM C6Z06 off a 2008 Z06
front: 18 inch x 9.5 inch P275/35ZR18
rear: 19 inch x 12 inch P325/30ZR19
Performance? Braking appears somewhat better, but I didn't do the mod for performance per say, as I don't track or race the car so I would let those that do make the statements about that aspect of the conversion. Logic would say it should be better. I am not getting any errors on the DIC. I have probably put 10 - 15 miles on the car since Thursday night. I will be going on a run this sunday with others in the club and that will put about a 100 or so miles on the car.
Last edited by alxltd1; 01-07-2012 at 11:08 AM.
01-07-2012, 11:25 AM
#102
Racer
[QUOTE=alxltd1;1579669590]
Thanks for all the information. My question on performance was more in regard to any degradation or any issues. I am doing this more for the looks, but there were early discussions with concerns about having larger or equal size calipers and rotors in the rear. Let us know how the cruise goes on Sunday. PS did you have to use any spacers on the C6Z wheels?
No spacers on the wheels. Some say they will rub, and mine are close. Only suprise I had was with the front rims/tires. I had the front driver's side tire lightly rub inside the front fender well when I turned right. That's the problem with mass produced cars. I talked with engineers at the Bowling Green plant down the road and they explained that there are allowances in assembly. My car is 5/16" out of being square. Overall It aligns properly and drives well. The front cradle is where the difference is noted because of the rubbing. If I had stayed with factory size wheels would have never noticed it. I ended up dropping the front about an inch and changing the sway bars/shocks to C6 Z06 hardware to stop the rubbing.
Having stated that, I understand why some owners have to use spacers in the rear. If the body is slightly off the tub could rub.
Like I said it's close.
Thanks for all the information. My question on performance was more in regard to any degradation or any issues. I am doing this more for the looks, but there were early discussions with concerns about having larger or equal size calipers and rotors in the rear. Let us know how the cruise goes on Sunday. PS did you have to use any spacers on the C6Z wheels?
Having stated that, I understand why some owners have to use spacers in the rear. If the body is slightly off the tub could rub.
Like I said it's close.
01-07-2012, 11:43 AM
#103
Race Director
Wow, this is one of the best mods I have come across in months/years.
With all the information presented, I wonder if any aftermarket company will perfect this "upgrade" and put it together as a package deal, to include all necessary items (longer brake lines, rotors, brake caliper bracket shaved, availability to keep E-Brake, etc etc etc.)
I myself would go for a perfected system because I don't trust myself to get it right, and finding out on the street (or track) is not an option. I prefer safety too. Hahahaha
With all the information presented, I wonder if any aftermarket company will perfect this "upgrade" and put it together as a package deal, to include all necessary items (longer brake lines, rotors, brake caliper bracket shaved, availability to keep E-Brake, etc etc etc.)
I myself would go for a perfected system because I don't trust myself to get it right, and finding out on the street (or track) is not an option. I prefer safety too. Hahahaha
01-07-2012, 01:05 PM
#105
Racer
01-07-2012, 07:16 PM
#106
Racer
Today was nice so I cleaned on the car and while I had the wheels off to clean, I pulled the calipers off to inspect the brackets and see if any rubbing was going. The drivers side is fine. The passenger side caliper showed some signs of rubbing! So I took my dremal out and removed some the caliper where it seemed to be touching. But, only the passenger side. My goal is to get the clearance without having to trim the rotors. Because I would prefer to keep the maintenance down to just replacing parts as they wear out. And that would be the rotor and pads. There is plently of excess material on the both the brackets and calipers where the rotor hits so I should be alright. The material I removed off the brackets was enough, the new shields are fine and not rubbing. I will pull the rear wheels Monday evening and inspect them again after our road trip tomorrow.
Last edited by melvingregory; 01-07-2012 at 07:19 PM. Reason: spelling
01-07-2012, 08:06 PM
#107
Team Owner
Excellent thread - subscribed!
I might just do this - all I need is C5 front calipers, I have all the C6 Z51 stuff already and my left over C5 front brackets already!
"BUT" one question again, will they clear 17" wheels? - because I have 17" wheels with slicks on them for the drag track!
Currently my combo is 19x11 rear and 18x9.5 front - just worried about the 17" C5 Z06 drag wheels clear the combo!
Thanks,Matt
I might just do this - all I need is C5 front calipers, I have all the C6 Z51 stuff already and my left over C5 front brackets already!
"BUT" one question again, will they clear 17" wheels? - because I have 17" wheels with slicks on them for the drag track!
Currently my combo is 19x11 rear and 18x9.5 front - just worried about the 17" C5 Z06 drag wheels clear the combo!
Thanks,Matt
01-07-2012, 09:15 PM
#108
Racer
Excellent thread - subscribed!
I might just do this - all I need is C5 front calipers, I have all the C6 Z51 stuff already and my left over C5 front brackets already!
"BUT" one question again, will they clear 17" wheels? - because I have 17" wheels with slicks on them for the drag track!
Currently my combo is 19x11 rear and 18x9.5 front - just worried about the 17" C5 Z06 drag wheels clear the combo!
Thanks,Matt
I might just do this - all I need is C5 front calipers, I have all the C6 Z51 stuff already and my left over C5 front brackets already!
"BUT" one question again, will they clear 17" wheels? - because I have 17" wheels with slicks on them for the drag track!
Currently my combo is 19x11 rear and 18x9.5 front - just worried about the 17" C5 Z06 drag wheels clear the combo!
Thanks,Matt
01-07-2012, 09:32 PM
#109
Racer
Thread Starter
Excellent thread - subscribed!
I might just do this - all I need is C5 front calipers, I have all the C6 Z51 stuff already and my left over C5 front brackets already!
"BUT" one question again, will they clear 17" wheels? - because I have 17" wheels with slicks on them for the drag track!
Currently my combo is 19x11 rear and 18x9.5 front - just worried about the 17" C5 Z06 drag wheels clear the combo!
Thanks,Matt
I might just do this - all I need is C5 front calipers, I have all the C6 Z51 stuff already and my left over C5 front brackets already!
"BUT" one question again, will they clear 17" wheels? - because I have 17" wheels with slicks on them for the drag track!
Currently my combo is 19x11 rear and 18x9.5 front - just worried about the 17" C5 Z06 drag wheels clear the combo!
Thanks,Matt
Check out post #70 of this thread. He made it work with 17's.
01-07-2012, 09:38 PM
#110
Team Owner
01-10-2012, 10:58 PM
#113
Racer
Report from 100+ road trip. There appears to be no issues with the setup. We went on a run this sunday with some members of our local club. Pulled the wheels and checked the pads, rotor, calipers and shields. Pads are seating fine, braking was good. No panic stops or hard braking was done yet. I like to let brake pads and rotors to break in for a few miles before pushing if then. I am satisfied with the appearance and the only thing I will do with brake setup is locate some stainless lines for the rear. Again, I was going for appearance not so much performance.
02-04-2012, 10:16 PM
#114
Racer
Thread Starter
Report from 100+ road trip. There appears to be no issues with the setup. We went on a run this sunday with some members of our local club. Pulled the wheels and checked the pads, rotor, calipers and shields. Pads are seating fine, braking was good. No panic stops or hard braking was done yet. I like to let brake pads and rotors to break in for a few miles before pushing if then. I am satisfied with the appearance and the only thing I will do with brake setup is locate some stainless lines for the rear. Again, I was going for appearance not so much performance.
melvingregory,
Did you do any further driving. How are they holding up so far?
02-05-2012, 12:51 AM
#115
Le Mans Master
02-05-2012, 08:01 AM
#116
Racer
No issues, the setup is fine. With the mild winter we are having I've gotten the car out a few times, roadtrip to Nashville the last of January for a indoor car show (Nashville Autofest). Lots of positive comments on the setup. And I have driven to work and such a few days.
02-24-2012, 09:37 AM
#117
Melting Slicks
Member Since: Mar 2009
Location: Odessa FL
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St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Well I have collected all the parts for this conversion except for the longer brake lines which are on order at my local NAPA parts store. The calipers and brackets are at the powder coater being done in electron blue, sort of a ZR1 theme. After the rear is installed I will have to pull the fronts to have the calipers and brackets done in blue. Right now they are gloss black with the lettering in silver. Waiting to see if I will like the blue, my coupe is black. One last question: regarding the clearance issues because of the larger C6 Z51 rear rotor. Was the clearance a problem strictly because of the larger diameter of the rotor (13 vs 12.8) or was there also an issue with the thickness of the C6 Z51 rear rotor?
02-24-2012, 10:01 AM
#118
Racer
Well I have collected all the parts for this conversion except for the longer brake lines which are on order at my local NAPA parts store. The calipers and brackets are at the powder coater being done in electron blue, sort of a ZR1 theme. After the rear is installed I will have to pull the fronts to have the calipers and brackets done in blue. Right now they are gloss black with the lettering in silver. Waiting to see if I will like the blue, my coupe is black. One last question: regarding the clearance issues because of the larger C6 Z51 rear rotor. Was the clearance a problem strictly because of the larger diameter of the rotor (13 vs 12.8) or was there also an issue with the thickness of the C6 Z51 rear rotor?
02-24-2012, 10:29 AM
#119
Melting Slicks
Member Since: Mar 2009
Location: Odessa FL
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St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Hi, There wasn't any issue with the width/thickness of the rotors, just a minor rub on the bracket and calipers. Very slight, just had to file off a little bit on the calipers. If you have to do that, it would be on the underside out of sight. As I stated earlier in the post I wanted to make the adjustments on the brackets and calipers so that later on if I needed to replace the rotor and pads I could do it with off the shelf parts and not worry about having to mod the rotor.
02-24-2012, 11:57 AM
#120
Heel & Toe
Member Since: Sep 2011
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rear rotors
you can also use 1994 mustang front calipers single piston , but larger , i have the brackets and you can use the large 2008 z06 rotors , on the rear , i had this setup on my 1999 vette for over a year before i changed all the brakes to 2008 z06 front and rear.. wheels are 18 front 19 rear. pics if you want