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-   C4 ZR-1 Technical Postings (http://zr1.net/forum/forumdisplay.php?f=9)
-   -   In Defense of J55 Brakes (http://zr1.net/forum/showthread.php?t=33123)

dredgeguy 06-19-2021 08:22 AM
Re: In Defense of J55 Brakes
 
1 Attachment(s)
Quote:
Originally Posted by 1991 Corvette ZR-1 (Post 324558)
The Z26 package has been quiet as a mouse for me. I?ve been using it over a year now and no noise of any kind. The rotors are zinc plated, so it is a nice touch and good to know you don?t have to look at rusted parts of the rotor not in use. Low dust pads. The only thing that you might even consider an issue is on the rare cases there is enough pad dust accumulated that gets wet from say driving in the rain, it can run out onto the wheel and dry out. It requires some extra effort to remove from the wheel but a very minor issue.
I used the same and no issues with noise or vibration. Used C5 brakes up front and stock in rear. Was a pain clearing my FM5's. If I were to do it again would have stayed with stock J55's as only time I get on a track is during our C4 gathering at BG. Other than that normal daily driver.

sleazy rider 06-20-2021 12:48 PM
Re: In Defense of J55 Brakes
 
1 Attachment(s)
Quote:
Originally Posted by LGAFF (Post 324549)
What wheels are you using
i am using the corvette spyder wheels, 18 x 9.5 x 40mm in front and 19 x 12 x 59mm in the rear and the stock size tires but i am searching for some forged wheels to replace the spyders. stock wheel offset for the c4's is 57mm in the front. the spyders stick out of the wheel wells by about 3/4"in the front, which i hate the look, and i use a 1/2" spacer in the rear to place the tire in the middle of the wheel well to give me clearance on both sides. i looked at an aftermarket c6 zr1 wheel that had the correct offset in the front and cleared the z06's caliper but they weighed 35lbs in the front and 40lbs in the rear. each. and cleaning would be a b-otch with all those vanes to get thru.

LGAFF 06-21-2021 06:04 PM
Re: In Defense of J55 Brakes
 
Quote:
Originally Posted by sleazy rider (Post 324632)
i am using the corvette spyder wheels, 18 x 9.5 x 40mm in front and 19 x 12 x 59mm in the rear and the stock size tires but i am searching for some forged wheels to replace the spyders. stock wheel offset for the c4's is 57mm in the front. the spyders stick out of the wheel wells by about 3/4"in the front, which i hate the look, and i use a 1/2" spacer in the rear to place the tire in the middle of the wheel well to give me clearance on both sides. i looked at an aftermarket c6 zr1 wheel that had the correct offset in the front and cleared the z06's caliper but they weighed 35lbs in the front and 40lbs in the rear. each. and cleaning would be a b-otch with all those vanes to get thru.

Those look awesome... not as awesome it would look with performance cams.... be pretty awesome :hello:

LGAFF 06-21-2021 06:06 PM
Re: In Defense of J55 Brakes
 
I got my EBC redstuff pads last weekend and installed the doug rippie bias spring in a new master cylinder might do the swap this weekend

XfireZ51 06-22-2021 09:04 AM
Re: In Defense of J55 Brakes
 
Quote:
Originally Posted by sleazy rider (Post 324632)
i am using the corvette spyder wheels, 18 x 9.5 x 40mm in front and 19 x 12 x 59mm in the rear and the stock size tires but i am searching for some forged wheels to replace the spyders. stock wheel offset for the c4's is 57mm in the front. the spyders stick out of the wheel wells by about 3/4"in the front, which i hate the look, and i use a 1/2" spacer in the rear to place the tire in the middle of the wheel well to give me clearance on both sides. i looked at an aftermarket c6 zr1 wheel that had the correct offset in the front and cleared the z06's caliper but they weighed 35lbs in the front and 40lbs in the rear. each. and cleaning would be a b-otch with all those vanes to get thru.
Part of the reason the fronts stick out as far as they do is the brake rotor. With my stock Z06 wheels over the stock brake rotors, the tire would protrude past the front fender opening as u describe. With the Z06 rotor, the tire receded into the wheel well further, and then w the 2piece Coleman rotors and aluminum hat, its nearly flush.
I?m using an 18mm spacer for the stock rear Z06 wheels.

sleazy rider 06-22-2021 11:52 AM
Re: In Defense of J55 Brakes
 
my issue is not the rotor but the c6 z06 caliper size. the caliper sticks out 2.22"/57mm from the hub mounting face. what i am looking for is a wheel that will clear the caliper and yet fit in the wheel well to give me a 57+/-mm offset.

sleazy rider 06-22-2021 12:06 PM
Re: In Defense of J55 Brakes
 
Quote:
Originally Posted by LGAFF (Post 324662)
not as awesome it would look with performance cams.... :hello:
with the engine out of the car right now, i guess it would be the perfect time/opportunity to replace the cams, but $$ seems to be in short supply at this present time and i never budgeted for them. between you, jerry's, marc haibeck, zfdoc, stainless works and jet hot, i managed to spend over 6k and my paypal shows it. i need to sell some more parts...lots of them!

LGAFF 06-22-2021 12:29 PM
Re: In Defense of J55 Brakes
 
Quote:
Originally Posted by sleazy rider (Post 324676)
with the engine out of the car right now, i guess it would be the perfect time/opportunity to replace the cams, but $$ seems to be in short supply at this present time and i never budgeted for them. between you, jerry's, marc haibeck, zfdoc, stainless works and jet hot, i managed to spend over 6k and my paypal shows it. i need to sell some more parts...lots of them!
Just giving you a hard time, appreciate the support and buying parts!

sleazy rider 06-22-2021 12:46 PM
Re: In Defense of J55 Brakes
 
Quote:
Originally Posted by LGAFF (Post 324677)
Just giving you a hard time
appreciate it! makes me feel as one of the pack...in my own warped mind. :cheers:

XfireZ51 06-22-2021 12:53 PM
Re: In Defense of J55 Brakes
 
Quote:
Originally Posted by sleazy rider (Post 324675)
my issue is not the rotor but the c6 z06 caliper size. the caliper sticks out 2.22"/57mm from the hub mounting face. what i am looking for is a wheel that will clear the caliper and yet fit in the wheel well to give me a 57+/-mm offset.
Of course I did not have that issue given the use of the stock Z06 wheel.


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