Zsteve

It is possible to rebuild the distributor mechanical advance (the weights on springs) and misaligh the internal distributor driveshaft 180 degrees from stock when you reassemble. This can happen because the weights have two pins that stick through a rotor on the internal to distributor driveshaft-these pins are both the same diameter so you can assemble 180 degrees out of sink with the other driveshaft that powers both the oil pump and the distributor. I confirmed this problem when I removed the valve cover, placed the camshaft lobes of the number 1 cylinder with both intake and exhaust closed and pulley timing mark at Top Dead Center and checked the #1 distributor cap position and found it was 180 degrees out of position.

This part is still available from Nissan for about $120!!

I joined after the cut-off to get access to Aerodynamics data. How can I pay and get the access?

Designing the front to rear piston areas appears to have not been addressed with this topic. The Silvermine rear kit with 43mm piston gets close to the right front to rear piston area ratio but could be better (I have the 2 piston 43mm/34mm front caliper). Check the graph from this link: http://stoptech.com/technical-support/technical-white-papers/white-paper---brake-bias-and-performance-why-brake-balance-matters . The car for this link has very similar front to rear weight balance as a Z-car statically. Dynamically, though, with race car spring rates, a 30% contribution by rear brake piston area is near the maximum needed. Street cars won't need near as much rear brake. There are other variables such as rotor size, pad material, spring rate, proportion valve that effect brake bias sizing but front/rear piston sizing is the most important. Because of this, I picked a 3 square inch rear piston to balance out the front brakes.