You are the first and only person to ever say that they have a failed engine that had an UDP on it.
Here is the problem.
1) There have been lots of engine failures.
2) Even if only a minority of them had UDPs, you cannot say UDPs are NOT part of the problem. Why, because the stock damper has been PROVEN by the OEM supplier to FAIL to prevent crank whip. Essentially, a high "background" failure rate makes it impossible to see a additional failure rate imposed by a UDP. (BTW, this is a common problem in medicical research re: disease incidence).
3) So to know HOW much worse is a UDP, you would need all the numbers....UDP failures/total Duratecs with UDPs and compare with stock failures/total stock Duratecs. Then you could see if the UDP is just BAD (same as stock), very BAD (a bit worse than stock), or VERY BAD (much worse than stock).
Now, I can't say UDPs are proven to be a bad thing, but you can say that in this case based on what we know about crank harmonics in Duratec, they theoretically SHOULD a bad thing. Kind of like smoking..it shortens the average life span of a POPULATION but some INDIVIDUALS live very long lives. On the other hand, DMDs are proven to be a good thing (as far as harmonics) and they are mutually exclusive..
