Quote:
Originally Posted by Boxer486
So who's going to put together a Radi-Cal kit for the 86?
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Just to continue this train of thought...
Here's a link to the CP8522 Radi-Cal caliper (smallest of the 3 sizes that AP produces):
http://www.apracing.com/Drawings/CP8522-2~5S0_CD.pdf
You can see that it accepts a rotor up to 410 mm x 36 mm. That's their biggest rotor they produce, and not necessarily what we'd want. 16" is overkill for well... anything.
If you can identify the ID of the stock wheel, we can calculate the max rotor size:
Max rotor OD = Wheel_ID - 2*clearance - 2*(OD of caliper - max rotor position)
= Wheel_ID - 2*3mm - 2*(30mm)
If we conservatively assume that there is 1/2" from the bead contact zone to the ID of the wheel...
That calculates down to 340 mm. The nearest standard disc sizes are: 343, 330, 325, 315. The standard widths available are: 36, 32, 28, and 25.4.
For the sake of argument, let's got with 325 x 36.
You can do "float in disc" or "float in bell" mounting if you wanna get floaty. Typically you want to float in the disc though. I'm not completely sold on it... but I guess you can also use their new "strap drive" mounting method which further decouples the rotor from the bell:
Here's a link to the bell specs:
http://www.apracing.com/drawings/cp2494-2000CD.pdf
They state that the bells are typically 6.5mm thick, and use 1/4" fine-thread bolts. Bobbins for the chosen disc are CP2494-504MP. This is the "P" type. Washers are CP2494-1305. Nuts are CP2494-117.
Mounting the caliper and spacers for the bell are more complicated calculations than I feel like doing at the moment. It does seem do-able though, if you really want to run them. We'd need specs on the OEM wheels and the OEM mounting holes.