Packed some some bearings and trialed a mock up. Had a adjust some of the holes with a file for fitment.
Borrowed a bearing packer (reused bearing seal because ratsun)
New rotor installed (at this point I thought I was on a roll) since the rotor didn't touch the suspension.
Went to bolt on caliper and this is where it all went wrong...
Wasn't enough room to put the caliper mounting frame behind the rotor....
At this point I'm scratching my head and second guessing my measurements or alignment etc. So I packed it up for the night and gave myself time to think.
Going over it the next day, I thought it could only be 2 things;
- Sample rotor was in fact not off an R31 skyline.
- I hadn't bolted the hub on properly OR that 410 & 411 hubs were different.
Turns out the sample rotor I had used for fitment was off a R30 skyline that I had wrecked years ago, and not a R31 as suspected. Therefore there is about 10-12mm different in hat size;
Now I'm left with either modifying the caliper mount spacer to suit the new hat size of the R31 rotor, or buy new R30 rotors. The difference is that R30 are less common and likely to not be made in the future IMO, they also may not give good caliper clearance. R30 rotors are also 3 times the price of an R31 rotor.
Another positive of the R30 rotor is suspension clearance may be better due to a shorter hat size.
The next step will be to put the R30 rotor on and assemble it and check full suspension bump for clearances, and then do the same with the R31 rotor. My preference is the R31 rotor but it will all be depend on what is the best option overall.