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PostPosted: Mon Jul 09, 2018 3:43 pm 
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Very cool. Looks like the front matches the rear quite nicely.
They look like big brakes under the fronts. I assume R33 disks?

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PostPosted: Mon Jul 09, 2018 4:28 pm 
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Currently Z32 / R32 but I have a set of 296mm Exige rotors to go in with R33 calipers modified to fit 26mm wide rotors, all on my own design alloy hub. Slightly bigger, but a massive 3.5kg lighter per side ... compared to std R31

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Last edited by AlanDatsomefun on Mon Jul 09, 2018 4:36 pm, edited 1 time in total.

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PostPosted: Mon Jul 09, 2018 4:32 pm 
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3.5Kg is massive.

I've always wanted to get an aluminium hat floating version of the R33 rotor I am currently using on the front of my car.
Unfortunately DBA don't make them. Plus they would be too expensive I think...

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PostPosted: Mon Jul 09, 2018 4:45 pm 
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Earlier, I included a photo of rotor, hub and alloy spacer plate under the thread "Brakes Upgrades Performance and Weight".
The R33 calipers look no different, they are just 4mm narrower: no real saving here.
The 296mm diameter x 26mm thick DBA bolt-on rotor for the Lotus Exige is heaps lighter than the Nissan R33 rotor which also incorporates a cast "hat", overall making it as heavy as a boat anchor.
The alloy hub is very much lighter than the Nissan Z31 Californian 5-stud one, not surprisingly.
Whilst the design replaces cast iron with aircraft grade 6061-T6 alloy, the whole assembly contains much less metal.
Unfortunately, this worked out to be a very expensive modification. Titanium bolts have to be used to fit the rotor.
Hubs have a design life of 80,000km.
This was quite difficult to design and tricky to build, particularly from the viewpoint of installing the bearings without damaging the hubs.
... but exciting to do.

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