Thank you for the reply.
I was hoping that as you had them 2 years ago that you had got some use out of them in your boat by now, but sounds like not at that stage yet.
As they are a modified car engine
, I was wondering about the real life use/performance onboard a boat. Wth the 2.5tds intercooled car engine giving about 141hp (260/280 Nm) and the marinised version giving 150hp they seem a reasonable option to go with a sterndrive (many diesels probably wreck sterndrives because of too much torque). The car engine rated at 141hp at 4600/4800rpm and the marined version quoted at 150hp at 4800rpm isn't pushing the engine much, although I realise that quoted car figures are "at best" and cars are not normally run at max rpm
for any length of time and I am sure heat would be an issue if these engines were run at 4800rpm for any length of time, perhaps 3900/4100rpm being a more realistic maximum for any length of time.
I am just guessing that running these in a boat situation with engine more heavily loaded should be OK in the 2700-3400rpm sort of range (perhaps 100-130hp) with 3800rpm (perhaps 135hp) maximum for short periods, otherwise heat issues may occur.
Not sure what to make of torque as quoted maximum torque of 260/280 Nm for 2.5tds is given for 2200rpm, however, Dyno dynamics graphical result appears to show similar maximum torque but at around 3000rpm.
I believe that the exhaust
manifold is a standard car type and not marinised, I guess that the alternator
and starter motor
are also standard car engine parts
, therefore I would presume that engine internals (valve seats/heads, cam shaft etc are also standard car parts) and no marinised thrust bearing, therefore care must be taken with these engines in a boat situation not to stress them too much, hence the lower guesstimate of useable rpm
range for use in a boat.
So, much of the above is just guesswork and I was looking to see if you had real world engine in boat experience, just to confirm (or abuse) theory that 2700-3400 rpm (probably with maximum torque of about 280Nm around 3000rpm) giving about 100-130hp was realistic.
Obviously these marinised engines are old engines from cars and as such output figures are probably somewhat less than when new, however, as older more basic indirect injection engine, may last well if treated correctly and maintained well. Also as they were used in BMW/Omega/Range Rover cars, spares are probably readily available.