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Re: 9 bolt rear PBR brakes using C5 rotors possible?
Quote:
Originally Posted by Daz
What I have
C5 rotors
LS1 front calipers/abutments
C5 conversion brackets
9 bolt rear with PBR brakes
C5 pads
Since I need rotors it would be nice if I can just upgrade to C5 brakes in the back
I have 18" Z06 wheels in the back if it matters
Well hey there...
The C5 rear brakes aren't as bolt on friendly as LS1s are, the backing plate bolt patterns are totally different. Here's some progress I made a while back but this is currently set up for a drum rear:
I apologize for not having them finished yet and it's too cold now to get to them so I'll get back to them when it warms up a bit. Until more progress is made, you can buy C5 rear conversion plates from Kore3 (~$750 for the plates) or just convert to LS1 rear discs which are very close to C5s, only slight differences in the two. Also, since you have a 9 bolt, that bolt pattern is different from the LS1 pattern as well, another issue there. Since you already have PBRs out back, I'd recommend increasing rear disc size (13" or so) and running C5 or larger front discs that will fit your 18" wheels. A 14" C6 ZO6 rotor with either LS1 or C5/C6 front calipers would work nicely for you.
Re: 9 bolt rear PBR brakes using C5 rotors possible?
Quote:
Originally Posted by ebmiller88
Well hey there...
The C5 rear brakes aren't as bolt on friendly as LS1s are, the backing plate bolt patterns are totally different. Here's some progress I made a while back but this is currently set up for a drum rear:
I apologize for not having them finished yet and it's too cold now to get to them so I'll get back to them when it warms up a bit. Until more progress is made, you can buy C5 rear conversion plates from Kore3 (~$750 for the plates) or just convert to LS1 rear discs which are very close to C5s, only slight differences in the two. Also, since you have a 9 bolt, that bolt pattern is different from the LS1 pattern as well, another issue there. Since you already have PBRs out back, I'd recommend increasing rear disc size (13" or so) and running C5 or larger front discs that will fit your 18" wheels. A 14" C6 ZO6 rotor with either LS1 or C5/C6 front calipers would work nicely for you.
HTH...
Ed
So I guess all I need a the plates to install my C5 rotors and LS1 front brakes then?Ill go for the 14" rotors if possible too.Take youre time Ed and thanks for the support.
Re: 9 bolt rear PBR brakes using C5 rotors possible?
Basically yes, along with a couple other things and some details.
Hubs, mods to spindles, custom conversion brackets for a 14" rotor and LS1 caliper and abutment, new brake lines/banjo bolts, LS1 pads (LS1 calipers = LS1 pads). Good luck!
Re: 9 bolt rear PBR brakes using C5 rotors possible?
Quote:
Originally Posted by ebmiller88
Basically yes, along with a couple other things and some details.
Hubs, mods to spindles, custom conversion brackets for a 14" rotor and LS1 caliper and abutment, new brake lines/banjo bolts, LS1 pads (LS1 calipers = LS1 pads). Good luck!
Ed
spindles?dude Im only talking about mods to my current rear PBRs .I already have C4HD for the front.. Get those plate done ED!!! hehe
Re: 9 bolt rear PBR brakes using C5 rotors possible?
Quote:
Originally Posted by ebmiller88
Well hey there...
. Since you already have PBRs out back, I'd recommend increasing rear disc size (13" or so) and running C5 or larger front discs that will fit your 18" wheels. A 14" C6 ZO6 rotor with either LS1 or C5/C6 front calipers would work nicely for you.
HTH...
Ed
any luck on the plates Ed?
custom backing plates are all I need to use the 13" C5 rotors correct?Along with LS1 calipers etc of course.
Re: 9 bolt rear PBR brakes using C5 rotors possible?
Hey Ed interested in those 13" rotor brackets for pbr brakes, any pics, price and when can i order, i need them for my 19 C6 rims, what else will i need besides the rotorsand plate, i currently have the pbr set up on my 91
Re: 9 bolt rear PBR brakes using C5 rotors possible?
Let me be clear, the C5 rotors won't swap in with the LS1 backing plates/abutments and then bolt to a 9 bolt, there's a few differences in designs that won't allow it. The C5 and LS1 rotors have a slightly different offset and the LS1 plate has a different pattern than the 9 bolt. I was referring to the earlier '89-97 LT1/1LE/J65 rear disc design prior to the LS1 rear discs in '98-up. As usual I'll see what I can make fit but at this time you can't do that without a custom backing plate.
