Reply to "How to increase the power handling of a ZF? (850 newton/meters or 627 foot/pounds)"

hi Push, yes we have some crazy people here in Austria :-) But in fact, the last zf , I have rebuild here was from 1972! The ring and pinion, states the date also and it was from 1972!
I think in the near future the ZF "problem " will grow up ! The engines are stronger than in the past and the zf´s are getting older and older.
We have worked out that our new Ring and Pinion have a live time from 32 000 hours @ 141 nm and 4500 rpm. But with 9000 RPM and 700 nm it is dead after only one hour! The function is not linerar - its like a e-function. But our new Ring and Pinion is minimum 1.5 factor better than the stock one!
So you can imagine how long a old ring and pinion set works, when you drive hard with a 700 nm Engine! Maybe a couple of weeks! Friends with racing BMW M1 change every year the ring and pinion sets, because they do not want to have a big zf failure during the race! When you increase the power from the Engine, the zf is realy a weak point. Right now we collect orders for the new ring and pinion sets. The ratio is about 4.0 . price something arround 2500.- and 3000.- euros it depends on the quantity. please pm me, when you are interessed.