Can anyone provide sizing info for wet exhausts on diesel engine. My recent
purchase originally had 80 HP petrol engine, then 30 HP Lister, now 80 HP
converted Nissan diesel. The Nissan is OK up to about 2200 RPM, but over
that the exhaust has both a little smoke and what looks like steam to me.
And the exhaust if absolutely rocketing out the pipe ! I've seen
somewhere that diesels have twice the exhaust volume of similar sized petrol
engines, which suggests the exhaust may be half the required area ( I bet
it's the original diameter ...) but I'd love either rule of thumb or
rigorous methods for sizing exhausts.

Thanks

David