Hi Richard and All,
I have a similar small rod Ariel Huntmaster engine to reassemble once this Bl***y knee will let me stand for any length of time,
The conrods have the small nuts with built in washer, they are 26tpi
While convalescing I have been thinking on what torque to use on those bolts / nuts,
My thoughts are that the "8" is a misprint for 18
which would be similar stretch on a BSF bolt (I think it was the long stroke engines had BSF bolts ????)
I think I am going to aim for 0.004in bolt stretch rather than any notional torque value
That is what I did with the last A10 engine using new ARP bolts after completing their stretch cycling
There was a very interesting group of posts some years ago about the torque value to use when fitting new alloy rods with ARP bolts, If torqued to ARP's values the alloy rods would distort and jam the big ends
I cannot remember the final outcome of that discussion
John