Hi guy's,
I've had this on my mind for a while now and I honestly don't know what the answer is, so I thought I'd just put it out there and ask for some opinions on the matter.

I maybe way off the mark here, but as I said I don't know.
It seems to me that when knock occurs and it's shock wave, for want of a better term, is transmitted through the block to the knock sensor. The knock, if you like, would be a harder one through iron than it would be through aluminium.
Is this the case? Or is there no difference at all?

And if it is. Is there a difference in the sensors and there signal sample windows? 

All the very best guy's
O.T.

Many, many thanks to you for the reply on that. It sets it at peace in my head now...

All the very best,
O.T.