[KobaltBlau]

This is a very interesting question. Titanium as a material does not have a fatigue life like aluminum does. However, there are many flaws which could make one or more of the 935 rods unusable, and replacing a single rod may be very difficult.

If I were in your position, I would first try to determine whether I was building an engine for which these rods would be useful. They are quite lightweight, but this is of course more useful with a higher RPM engine. I'm not sure if there are many 3.2 935 rods floating around, but you should determine if they are in fact for the shorter or longer crank as this may change whether you can use them.

The 935 rods also used titanium rod bolts. I have talked with respected folks on both sides of the issue of reusing 935 rod bolts, but I personally would not reuse rod bolts that I had not purchased myself, i.e. of unknown history.

The key thing I would want to do, however, is send the rods to a respected engine builder who has experience with 935 rods. I would give the seller some sort of deposit contingent on an inspection of the rods, and ask the engine builder to inspect them in detail. if they don't pass muster, the deposit could be refunded, but if they do you could pay the balance and the engine builder would send the rods to you. This "trusted third party" approach may be especially useful on this expensive but very critical item.

Good Luck,