On Aug 22, 8:18 am, Gene Kearns
wrote:
On Wed, 22 Aug 2007 07:30:16 -0700, UglyDan®©™ penned the following
well considered thoughts to the readers of rec.boats:

Eisboch wrote
If a "blower" is defined by you as a turbo (i.e. .., device to increase
air flow into the cylinders), then you are in error. I know several
people with 2 stroke DD 6-71's. Some are naturally aspirated, some have
turbos (blowers).
Eisboch

Richard,
All 2 stroke DD series whether inline or V configuration 71- 53's- 92's
even the old 110's etc.. have blowers, Naturally aspirated (NA) or
turbocharged (TI) . The 6v53 in my boat is a NA with a blower. UD

An engine is, by definition, either naturally aspirated or not. If it
has a blower (supercharger) or turbocharger it is not naturally
aspirated.

http://en.wikipedia.org/wiki/Naturally-aspirated_engine

--

Grady-White Gulfstream, out of Oak Island, NC.

Technically, you are correct, but since ALL Detroit Diesel (and their
precursors, the "Jimmies") 2-strokes have crankcase blowers by design,
the convention has always been to call an otherwise unenhanced engine
"naturally aspirated" (NA), and add the appropriate moniker if also
turbo-charged with or without cooling (T, TI, TIA).

By design, without the crankcase blower, a DD won't run.

Regards,

Bob

Homepagehttp://pamandgene.idleplay.net/

Rec.boats at Lee Yeaton's Bayguidehttp://www.thebayguide.com/rec.boats
-----------------www.Newsgroup-Binaries.com- *Completion*Retention*Speed*
Access your favorite newsgroups from home or on the road
-----------------