I found this:
Diesel Performance | AERA Engine Builders Association by googling 'diesel performance engine builders' and that was my pointer to LSM.
I enquired abt their CGI blocks first, and that was a non-starter, then I asked abt their machined 4140 and Steve, Jnr said they'd prefer not to do any more of them, but how about their cast aluminum?
If you know of a machined Al Cummins B block, yes, please. There were more than one or two things I did not like abt LSM, but saving 1000# over a pair of OE Cummins 6.7 blocks certainly increases their attractiveness.
I have no idea what you said abt timing & electronics, I'm sorry. I am comfortable building and maintaining cast-iron diesels, and I need other things than max HP.
DMAX is a non-starter for me, however, for reasons I listed, PLUS when I have an option, I refuse to spend a single pound, pence, peso, penny with GM, so that's a two-fer: DM is completely untried AND it's from GummintMotors.
It is likely I will build a smaller, softer version of this boat, and I would swallow my angst and consider an aluminum DM, but NOT without a
substantial service history.
Frankly, I think the VM Motari 3.0 offers a LOT of development potential, pus, it is sooooo cute.
I am in England, and I'm not worried abt fuel. My worst-case standby is Jet-A, and chainsaw oil, plus additives. I have enough synthetic diesel stashed to carry out testing in the states.
Again, 1120º, 1-1½ Bar, 625± kW & 6-10litre/mile, I'm gold.
Virtually every engine-builder I spoke with assured me he could make 1500hp as easy as he could make 1000. For MY purposes, that is counterproductive: can't use it, don't need it, needs more wrenching and it dies sooner.