[John Rogers]

The only way to find the loss of power in the drive train is to take the engine to an engine dyno shop and have them run it. Then put the engine in and take it to a rolling dyno and make some runs with no engine changes. EngHP - RWHP = loss and then you can figure percent.

UncleBilly asked about coolers in race cars and many do not need them but those that are very high speed, high rev or ancient mechanical (901 trans) need a cooler for longevity. In the 914-6 I used to race we had a cooler/pump system to make the ring and pinion last longer and also the same with those hard to find gears. Most serious vintage Porsche racers I knew had coolers in their cars and tranny failure was rare.