Adding disk brakes to your Europa? Where is the ideal placement?

Recently the question of ideal caliper placement has been bandied about, at least in highly nuanced Europa modifying community. Factors like suspension location, rim diameter, and cooling notwithstanding, there are other, more physics-minded calculations to be taken into account. Which is why I'm never surprised to see some AutoZone hopped up Civic handling poorly. It is amazing the amount of time/money spent on ill though out modifications purchased out of the backs of car magazines.

Now, onto selecting the location for our Europa's rear calipers.

The following is from Dave/2560. Lets say that the caliper friction center is 6" from the axle center, the tire is 24" diameter, and the braking action is capable of 1G of deceleration. If the caliper were at 270° 1G of stopping torque would add 2G of down force on the bearings (Total:3G) AND 1G deceleration (pressure on the front of the bearings)(Grand total: 3.16G at 200°). However, if it were mounted at 90°, the 2G down is now up giving a total of 1G up (added to 1G deceleration, that is 1.4G at 315°). But remember that the 2G force is always 90° from the mounted position and the 1G of deceleration is always pushing the tire to the rear (pressure on the front of the bearings). To neutralize the deceleration force on the bearings the caliper should be at the 150° position. This would also bring the 90° positions excess G force down by 1. This seems to be the ideal position.

Now, try to find a caliper that will bleed properly in that position!