Engine Speed

[Jeff Miller]

The 3208 drives more like a gas engine, it develops more of its power
with higher RPM.

The 3208Ta is rated at 2650rpm, max. operating rpm is 2800+/- 50rpm
(225hp & 250hp)
The 3208a and 3208ATAAC are rated at 2850rpm, max. operating rpm is
3000rpm+/- 50rpm (190/210hp and 300hp). The ZF transmissin is rated
for 3000rpm.

I prefer to run the 3208 above 2100rpm for climbing, tends to develop
more boost up there anyway. The preference to higher rpm is because
the oil pressure & flow is higher to produce more
lubrication/protection/cooling, the water flow is higher to provide
more cooling, and the transmission fluid flow is higher to produce
more internal cooling. It is also because developing power with RPM
reduces the internal forces in the engine (cylinder pressures/ring
pressures, forces on main and rod bearings, etc.) than lugging an
engine. Keep the revs up and temps down.

The 92-series DD also has a higher power curve which punishes those
who let it fall off the ball in a climb, the S-60 pulls very well at
low RPM where it is designed to run.

- Jeff Miller
in Holland, MI


--- In WanderlodgeForum@yahoogroups.com, Wilhelmus Schreurs
wrote:
>
> I have read a lot of the posts about engine speed for the 3208 NA,
and wow, I never realized that you would wind them up so high,
3000rpm.
> What about the 3208 TA, the manual says do not let it lug lower
than 1400 rpm, but it does not say anything about the top rpm. What
would it be?
>
> Also, I will be towing a 24' trailer, and when going uphills,
what is the rpm range that I should try to maintain.
>
> This is all with Randy's ex BB and Crit's ex trailer. I know
these guys will also give me all sorts of tips.
>
> Thanks
> Bill
> 84FC35SB
> Terrace, B.C.
> (Maiden voyage in Oct.)
>
>
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