Jeff Curtis

Okay, clear out yer dirty minds.

I am contemplating the purchase of a pair of BIG Red calipers off of a 1994 C2 Turbo, a 965.

I know they are a direct bolt-on for the 964, but I can't recall if anyone had figured out a different rotor to use in the rear or if they just used the factory 964 rotors??

I seem to remember someone saying the RS rear rotors are thicker than the "regular" version. Can anyone confirm that and where I could get a set?

Thanks in advance for your input.

Adrian

Dear Jeff,
RS rears are 24 mm thick.
Ciao,
Adrian
964C4

tonytaylor

I believe the RS rear disc is thinner ( than the 965) and the part number is a 951 item.
I have the set up and could get exact part number.
I was advised that the rear pads needed changiing early, ie with material left on and not at the rivets as usual, because of this discrepancy but can`t say I`ve noticed a problem.

Jeff Curtis

Tony, that seems to be what I remember reading somewhere, either they are a 968 M030 or a 951 part.

Your info. would be helpful.

ThomasC2

It's the RS discs you should buy and it's a 951 number as Tony says. You could maybe need a 2 mm washer between the caliper and the hub to center the caliper over the rotor.

This is my last post this year, now it's time to party here in Sweden!!

Jeff Curtis

That's funny...you lucky dog, I'm stuck here at work for another hour and you're set to party.

Happy New Year EVERYONE!!

tonytaylor

On mine set up on rear is;

caliper 965 352 421/2 12 ( 2 of)
disc 951 352 041 91 (2 of)
pads 965 352 939 04 (now pagid yellow)
sensor993 612 365 01 (2 of)
shim 965 352 096 01 ( 8 of)

all according to the invoice, so I assume are correct.

Advice "replace rear pads when thickness of material is down to 4mm"

Hope this helps.

Jeff Curtis

Hmmmm, do the shims go behind the pads or to space out the caliper??

Thanks for that info.

tonytaylor

I don`t know!, but when they changed the pads I don`t recall loads of washers involved. I suspect they are to center the caliper over the disc as Thomas suggests.

Matt Romanowski

Hi Jeff,

The 965 352 096 01 part number is shown as a "rear brake pad damper shim - 34 mm." I'm not familiar with the conversion, but it looks like this is the part that goes in the piston for silencing. It's a round peice with spring steel ball to locate it. They are not for centering the caliper over the disc. You would have to use regular washers for that.

Matt

Matt Romanowski

Hi Jeff,

The 965 352 096 01 part number is shown as a "rear brake pad damper shim - 34 mm." I'm not familiar with the conversion, but it looks like this is the part that goes in the piston for silencing. It's a round peice with spring steel ball to locate it. They are not for centering the caliper over the disc. You would have to use regular washers for that.

Matt

Bill Gregory

Jeff,

C2 Turbo rotors are made for 28mm discs, not the stock (or RS) 24mm ones. You can't use the C2 Turbo rotors as they are the wrong offset. VCI can narrow the set of calipers to use the 24mm rotor, or if you use them stock, just be real careful not to wear your pads down low, as they can fall out! Yikes

ThomasC2

Hi everybody, now I'm back from the party!

Just to clarify my earlier post. The washers are to center the caliper over the rotor. Put a 1,5-2mm washer between the caliper and the mounting hole on the hub. One washer for each of the two holes. They have nothing to do with the pads.

I believe this is an easier fix than doing any work on the hub. But without this you will see that the caliper doesn't align correctly over the rotor.

ThomasC2

About the pads....we're talking about 2 mm on each side. How can that possibly make the pads or piston fall out? Has anyone really seen this happend? I checked out the VCI homepage but I still don't understand how it could be, even though it's not a real problem for me because I change my pads long before the metal.

Jeff Curtis

Thomas, I actually agree with you, same issue for the guys that take their front 964 calipers and put them in the rear when they upgrade the front to 993 or BIG Red calipers.

I don't think it's an issue whatsoever, even if the pads do get run down a bit...but to the metal?? ...you're going to have more problems than your pistons falling out - don't I know!

After all, that's how I would up with BIG Reds in the front...I melted the hell out of one of my front calipers on a 3day track event where I wasn't paying attention to brake pad wear. In my defense, I was using a different brake pad than usual and didn't expect them to wear that fast.