my complete BBK conversion using Cayenne S - BREMBO callipers

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Originally Posted by Forest Gump

I don't know why someone wanting to do something like this doesn't just build brackets to extend the stock calipers out further. There is nothing really wrong with the stock caliper, it just needs a bigger rotor.

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This is what I'm talking about above with fitting stock callipers on evo or 370Z rotors. I looked at yhe specs of all rotors above yhe other day. The early evo is only 320mm from memory so not that much bigger than 2nd gen (314mm). This idea was discussed on 3si and even looked into by supercar eng but it was dropped due to lack of interest. Have a spare hub and calliper here to test and fab a bracket but time I don't have lol. I also looked on the supercar eng site for the calliper widening kit they sell but it seems to no longer be available. I think stop widened callipers with the stiffening bolts and 370Z rotors would be as good as any BBK for much less money.

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The stock calipers are very wide. The face of the caliper sticks out a lot farther than aftermarket ones. I think the difference on mine to the BBK was about 6mm. That is what causes fitment issues for a lot of rims.

That's a major plus for most BBK's. I think with the 370Z rotor sitting back 5mm it will help. The other one I found was the R33/R34 GTR which sits even further back.

Specs of a few I researched. All are 32mm wide except for the 350Z and the R33/34.

http://i299.photobucket.com/albums/m...ps2283962c.jpg

Vehicle make NISSAN
Vehicle model SKYLINE
Vehicle details R32 GT-R 2.6L TWIN TURBO FRONT VENTED
Dimensions DIA 296 TH 32 A 54 B 68 C 5

Vehicle make NISSAN
Vehicle model SKYLINE
Vehicle details R33/R34 GT-R 2.6L TWIN TURBO FRONT VENTED
Dimensions DIA 324 TH 30 A 53.7 B 68 C 5

Vehicle make MITSUBISHI
Vehicle model LANCER EVO
Vehicle details EVO 9 FRONT VENTED
Dimensions DIA 320 TH 32 A 43.5 B 69 C 5

Vehicle make MITSUBISHI
Vehicle model LANCER EVO
Vehicle details EVO 10 2.0L TURBO AWD (1 PIECE ROTOR) FRONT VENTED
Dimensions DIA 350 TH 32 A 43.9 B 69 C 5

Vehicle make NISSAN
Vehicle model 350Z
Vehicle details Z33 3.5L V6 W/BREMBO CALIPERS FRONT VENTED
Dimensions DIA 324 TH 30 A 49 B 68 C 5

Vehicle make NISSAN
Vehicle model 370Z
Vehicle details Z34 W/PERFORMANCE BRAKES FRONT VENTED
Dimensions DIA 355 TH 32 A 49.2 B 68 C 5
**Notes Alloy Calliper


This kit from Supercar Engineering widens the calliper to suit 35mm rotors. Kit consists of rotors and widening kit. But it's for the stock 2nd gen size.

Supercar Engineering

With the stock knuckles the rotor can only go so far back. Even if you remove the dust shield the inner hub portion of the rotor will be at risk of hitting the knuckle where the caliper bolts on. When I put my BBK on with my R6 rims it wanted to just barely hit the inside of the rims. One of my ideas was to modify the rotor since it was a 2 piece. I could undo the center hat and have a ring machined out as a spacer to push the rotor surface back farther. However upon inspecting it I noticed I could barely move it at all without hitting the ears on the knuckle for the stock caliper bolts. I'm sure the 2 piece rotors I ahave already sit back a little more than the stock ones did. Hopefully you won't run into that problem. I did get mine to clear with my R6 rims by moving caliper 1mm inward towards the axle nut, and 1mm back wards, but it was so close that you'd have trouble sliding a card through the gap. I went with new rims to be safe.

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Originally Posted by Forest Gump

There were wide spacer brackets offered by supercar, but I never saw anything that would just move the stock caliper outboard. It would be laughably simple if you were willing to thread the caliper itself (would use a threadsert if you were smart). I could cut one out with a grinder.

I just wish one of these threads would actually end in a completed setup that works. I've probably seen 10 over the last 10 years and never seen one where someone doesn't give up. I hope it works out for you.

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I made an extension bracket for the stock calipers and put 370z rotors on left wheel.
I got a video of it. It looks pretty cool. I had to slightly modify the stock calipers to have them sit closer to the center of the rotor. It was nothing major just some grinding. I got the caliper close enough there was only a mm or two of brake pad overhang. The other issue I had was the stock brake pads don't cover the full friction surface of the 370z rotor. There was probaly .5"-.75" of inner radial friction surface not covered. Also the wheel s I was running wouldn't fit over the set up. I used some 18x9 ssr gt1s and they fit over the set up but knocked the stcick on wheel weights of the inner drum of the wheel.

Pics of the bracket you made? Did it look odd with the extra rotor surface not covered? Was thinking that maybe the earlier evo might be a closer match and still big enough for me (320mm).

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so, back on topic, Cayenne Calipers on a 3S :)

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Originally Posted by Jesters Deadd

The other issue I had was the stock brake pads don't cover the full friction surface of the 370z rotor. There was probaly .5"-.75" of inner radial friction surface not covered.

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I'm happy that the TRW brake pads that I've got, are a perfect match so far with the 370Z front rotors.
Attachment 6330
Attachment 6331

I have left the wheels, caliper and rotors to a guy here that will make the adapters for the fronts.
will have it done in a couple of days or so.

the rears will be a problem
it will be great if you guys can help me a little....

Quote:

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Originally Posted by GTOJOE

Pics of the bracket you made? Did it look odd with the extra rotor surface not covered? Was thinking that maybe the earlier evo might be a closer match and still big enough for me (320mm).

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the EVO ones that you are talking about it stick out by 1.3mm so it might clear the 18" oem wheels, and they are 320x32mm, so a little bigger and but way wider.
most probably the pads will fit better than on the 370Z ones.

about the rears.

i'm about 90% sure I can't find a better fitment than the EVO X ones.
the only problem i have with them is that I need to make a custom spacer for the pads, so that it will fill the -6mm width of the rotors.
as I said the EVO uses a 22 mm width while the cayenne uses a 38mm one, so that I will not care anymore about that.
using a 22mm one will offer also a wider range of e-brake calipers range.
I'm still looking for the brembo one, and hopefully I will get the right one soon.

Did you mean 28mm rear rotor? Is the inside diameter of the brake drum on the evo that much bigger than the 3/S?

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