4 or 5-speed? And wich one??

[R2.0]

I think you need to look at a broader definition of "efficiency". On the whole it is cheaper to install a modified T1 4 speed than a 901/914 5 speed for the following reasons:

- The t-1 is a bolt in. 901-914's require slight body mods, fabrication of front mounts and linkage, and, in the case of a 914, replacement of the nosecone and hockey stick and flipping the differential

- Porsche parts are initially more expensive, and are rarer on this side of the pond.

Also, the 901 shift pattern is unfamiliar to most americans, and most of the ones who have tried it don't like it (I do like it, however). To get an "Ameriacn" shift pattern, one must go to a 915, which has the above problems in spades.

Personally, I am looking for a 901 since I like the shift pattern. One of the ways to get better acceptance of the 901/914 swap over here would be a bolt-in solution to the mount and linkage problem that didn't cost an arm and a leg.

R2.0