Mike:
Thanks for the info, much appreciated, interesting to note your warm up period.... I am not quite so gentle with my beast... I slow run for about 20 to 30 secs, allowing the lube to splash around a bit then put it straight onto working load once its up to working revs....
B&D:
Agreed re the accuracy point, but it does give an indication of potential carbon buildup in upper cyl and exhaust... as well as the most basic indication of burn... surely, lube oil, ring condition etc come into it, but on a reasonably sound motor, well...... enough said!
38ac:
Noted re the lister spec... Them injuns have a built in rack limit on mine.... the governor hasn't got a hope in hell of pulling further than its max point!
I have seen, when running on gunk, a large element makes a difference to power output/smoke emission, not because of more fuel, but because of more fuel earlier in the injection stroke... a small element, although giving sufficient power over the entire rack to max position, was very smokey at exhaust... the larger element, giving a bigger portion of fuel earlier in the injection event.... although final power output was largely similar, larger gives a cleaner exhaust, or seems to anyway... my thinking is more efficient, but only marginally to slightly more.. The downside is that because of the greater volume injected earlier in the injection event, is that the motor running becomes more prone to knocking.(Getting tongue tied here, but I think you will get my drift)
Agreed re running out and getting a bigger element just to try and get more power.... something will break.... for sure! But, by the same token, a larger element seems to be more tolerant to lower fuel quality by the looks of it, but again, take care, bad things can happen quickly! By and large, I am willing to risk TM1 by trying an even bigger element still, do you know offhand if there are 11, 12, or 13mm elements available? My local guys get a glazed look when I ask for anything even remotely out of the ordinary...they swore blind that a 10mm element didn't exist, even when I dangled it in front of their probosci....
By and large, so far, my playing leads me to the following relationship, albeit very general and maybe over simplified:
Lower revs - you can go down in element size
Better fuel, or fuel with a higher cetane - go down in size
Lower quality fuel, or fuel with a lower cetane - go up in size.
Higher revs than rated....... don't go there....
But, if you go down in revs and down in cetane/fuel quality, element will probably be OK as standard!
In playing with the bigger bore elements, do you recall if there were any cam differences specd as far as travel etc?
Keep it pumping....
Regds
Ed
PS - I will admit, governor response does seem better with the larger element, so maybe its not my imagination....Lol...
PPS - design spec for me was 4 to 5 kw average - 4.4kw on diesel sump gunk yields medium volumes of black smoke, the same on petrol sump gunk yields grey to dark grey smoke, the same again on pure dino yields a light grey to clearish... but.... the sump gunks burn with less knocking and don't smell as bad as dino.... then.... the phase of the moon changes with the next batch of gunk, and everything is the other way round and upside down! Gotta love them listers......