Wanderlodge Gurus - The Member Funded Wanderlodge Forum
A newbie's DD questions - Printable Version

+- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com)
+-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61)
+--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63)
+--- Thread: A newbie's DD questions (/showthread.php?tid=7355)

A newbie's DD questions - wilfreddrabble - 11-09-2008 17:07

I know that older DD engines are two strokes with cam actuated
exhaust valves but no intakes because they are blower scavenged.

I also think I know that the -71 series GM diesels had belt driven
Rootes-type superchargers.

Here is my first question:

Do all -92 series engines have turbochargers? (ie, not superchargers).

Second question:

On busses with 8V92 engines, are the engines mounted inline or
transverse? I know that on the old GM 4610/4710 busses with 6V71
engines, the engines were mounted transversely.

On 8V92 engined birds, is the transmission ahead of or behind the
rear axle?

To whoever takes the time to answer this post, MANY THANKS in advance!

John Alldredge

A newbie's DD questions - Leroy Eckert - 11-10-2008 01:55

John, I will tell you what I think I know.
Older DD engines are either mechanical or electronic controlled operations. There are no intake valves as you stated; the air drafted into the cylinder through holes in the cylinder wall.
Don't know anything about a 71and how the turbo is driven.
All 8v92's I have seen are turbocharged. Some after cooled. I have not seen them all so there may be some out there NA but that would seem to defeat the purpose.
I do not think BB built a East West engine configuration.
My 8v92 is in line, the tranny is behind the axle.
Leroy Eckert
1990 WB-40 Smoke N Mirrors
Dahlonega, GA
Royale Conversion

--- On Mon, 11/10/08, wilfreddrabble wrote:
From: wilfreddrabble

Subject: [WanderlodgeForum] A newbie's DD questions
To: WanderlodgeForum@yahoogroups.com
Date: Monday, November 10, 2008, 12:07 AM



I know that older DD engines are two strokes with cam actuated

exhaust valves but no intakes because they are blower scavenged.



I also think I know that the -71 series GM diesels had belt driven

Rootes-type superchargers.



Here is my first question:



Do all -92 series engines have turbochargers? (ie, not superchargers) .



Second question:



On busses with 8V92 engines, are the engines mounted inline or

transverse? I know that on the old GM 4610/4710 busses with 6V71

engines, the engines were mounted transversely.



On 8V92 engined birds, is the transmission ahead of or behind the

rear axle?



To whoever takes the time to answer this post, MANY THANKS in advance!



John Alldredge





A newbie's DD questions - ronmarabito2002 - 11-10-2008 02:33

Answers to your questions.

All 8V92 engines are turbo-charged
Engines are in-line mounted
Transmission is directly attached to engine and to the rear of the
drive axle.

R.E. (Ron) Marabito, Dallas, TX 92WB40

--- In WanderlodgeForum@yahoogroups.com, "wilfreddrabble"
wrote:
>
> I know that older DD engines are two strokes with cam actuated
> exhaust valves but no intakes because they are blower scavenged.
>
> I also think I know that the -71 series GM diesels had belt driven
> Rootes-type superchargers.
>
> Here is my first question:
>
> Do all -92 series engines have turbochargers? (ie, not superchargers).
>
> Second question:
>
> On busses with 8V92 engines, are the engines mounted inline or
> transverse? I know that on the old GM 4610/4710 busses with 6V71
> engines, the engines were mounted transversely.
>
> On 8V92 engined birds, is the transmission ahead of or behind the
> rear axle?
>
> To whoever takes the time to answer this post, MANY THANKS in advance!
>
> John Alldredge
>

A newbie's DD questions - Paul Carver - 11-10-2008 07:15

--- In WanderlodgeForum@yahoogroups.com, "wilfreddrabble" drab@...> wrote:
>
> I know that older DD engines are two strokes with cam actuated
> exhaust valves but no intakes because they are blower scavenged.
>
> I also think I know that the -71 series GM diesels had belt driven
> Rootes-type superchargers.
>
> Here is my first question:
>
> Do all -92 series engines have turbochargers? (ie, not
superchargers).
>
> Second question:
>
> On busses with 8V92 engines, are the engines mounted inline or
> transverse? I know that on the old GM 4610/4710 busses with 6V71
> engines, the engines were mounted transversely.
>
> On 8V92 engined birds, is the transmission ahead of or behind the
> rear axle?
>
> To whoever takes the time to answer this post, MANY THANKS in
advance!
>
> John Alldredge
> John,
You should identify the year and model of the coach you have or at
least the coach prompting the questions. I believe all of the DD 2
cycle engines, series 53, 71, and 92's have roots blowers (or
superchargers) whether belt or mechanically driven, as they won't run
na. Turbo chargers are in addition to that blower to increase hp
ratings and some of those turbo'd gain further boost with after
cooling.
Most motorhomes employ inline configurations with the transmission
bolted up directly to the engine, both ahead of the driveline to the
drive axle. (or behind dependent on view of a pusher) Exceptions
could be "converted buses". However all Birds I'm familiar with have
the engines configured to inline.
I hope this covers your basic questions and if not, e-mail me direct
for further elaboration.

A newbie's DD questions - Paul Carver - 11-10-2008 07:22

--- In WanderlodgeForum@yahoogroups.com, "Paul Carver"
wrote:
>
> --- In WanderlodgeForum@yahoogroups.com, "wilfreddrabble" > drab@> wrote:
> >
> > I know that older DD engines are two strokes with cam actuated
> > exhaust valves but no intakes because they are blower scavenged.
> >
> > I also think I know that the -71 series GM diesels had belt
driven
> > Rootes-type superchargers.
> >
> > Here is my first question:
> >
> > Do all -92 series engines have turbochargers? (ie, not
> superchargers).
> >
> > Second question:
> >
> > On busses with 8V92 engines, are the engines mounted inline or
> > transverse? I know that on the old GM 4610/4710 busses with 6V71
> > engines, the engines were mounted transversely.
> >
> > On 8V92 engined birds, is the transmission ahead of or behind the
> > rear axle?
> >
> > To whoever takes the time to answer this post, MANY THANKS in
> advance!
> >
> > John Alldredge
> > John,
> You should identify the year and model of the coach you have or at
> least the coach prompting the questions. I believe all of the DD 2
> cycle engines, series 53, 71, and 92's have roots blowers (or
> superchargers) whether belt or mechanically driven, as they won't
run
> na. Turbo chargers are in addition to that blower to increase hp
> ratings and some of those turbo'd gain further boost with after
> cooling.
> Most motorhomes employ inline configurations with the transmission
> bolted up directly to the engine, both ahead of the driveline to
the
> drive axle. (or behind dependent on view of a pusher) Exceptions
> could be "converted buses". However all Birds I'm familiar with
have
> the engines configured to inline.
> I hope this covers your basic questions and if not, e-mail me
direct
> for further elaboration.
>Sorry for not signing off appropriatly, as I thought "reply"
included an automatic signature stamp.
P. Carver '93 WLWB 8V92 Texas

A newbie's DD questions - ciao70@... - 11-10-2008 09:39

John..to the best of my knowledge all 8v92 have both, a supercharger and a turbocharger...The engine in the 8v92 powered Bluebirds are mounted inline with the transmission behind the rear axel and a short drive shaft..Jim barone 1991 PT





-----Original Message-----

From: wilfreddrabble

To: WanderlodgeForum@yahoogroups.com

Sent: Sun, 9 Nov 2008 11:07 pm

Subject: [WanderlodgeForum] A newbie's DD questions



I know that older DD engines are two strokes with cam actuated

exhaust valves but no intakes because they are blower scavenged.



I also think I know that the -71 series GM diesels had belt driven

Rootes-type superchargers.



Here is my first question:



Do all -92 series engines have turbochargers? (ie, not superchargers).



Second question:



On busses with 8V92 engines, are the engines mounted inline or

transverse? I know that on the old GM 4610/4710 busses with 6V71

engines, the engines were mounted transversely.



On 8V92 engined birds, is the transmission ahead of or behind the

rear axle?



To whoever takes the time to answer this post, MANY THANKS in advance!



John Alldredge





A newbie's DD questions - Gene Sharp - 11-10-2008 11:01

Hi, that is what our 8v92 has in the the backend of its 40'.

Gene Sharp 8v92
Belle Center, Oh



--- In WanderlodgeForum@yahoogroups.com, ciao70@... wrote:
>
> John..to the best of my knowledge all 8v92 have both, a
supercharger and a turbocharger...The engine in the 8v92 powered
Bluebirds are mounted inline with the transmission behind the rear
axel and a short drive shaft..Jim barone 1991 PT
>
>
> -----Original Message-----
> From: wilfreddrabble
> To: WanderlodgeForum@yahoogroups.com
> Sent: Sun, 9 Nov 2008 11:07 pm
> Subject: [WanderlodgeForum] A newbie's DD questions
>
>
>
>
>
>
> I know that older DD engines are two strokes with cam actuated
> exhaust valves but no intakes because they are blower scavenged.
>
> I also think I know that the -71 series GM diesels had belt driven
> Rootes-type superchargers.
>
> Here is my first question:
>
> Do all -92 series engines have turbochargers? (ie, not
superchargers).
>
> Second question:
>
> On busses with 8V92 engines, are the engines mounted inline or
> transverse? I know that on the old GM 4610/4710 busses with 6V71
> engines, the engines were mounted transversely.
>
> On 8V92 engined birds, is the transmission ahead of or behind the
> rear axle?
>
> To whoever takes the time to answer this post, MANY THANKS in
advance!
>
> John Alldredge
>

A newbie's DD questions - Gardner Yeaw - 11-10-2008 11:06

Because the DD is a 2 cycle engine it needs a boost at low RPM and
the blower provides that. The turbo charger adds to the boost when
the RPM's climb.

Gardner
83FC35

--- In WanderlodgeForum@yahoogroups.com, "Gene Sharp"
wrote:
>
> Hi, that is what our 8v92 has in the the backend of its 40'.
>
> Gene Sharp 8v92
> Belle Center, Oh
>
>
>

> --- In WanderlodgeForum@yahoogroups.com, ciao70@ wrote:
> >
> > John..to the best of my knowledge all 8v92 have both, a
> supercharger and a turbocharger...The engine in the 8v92 powered
> Bluebirds are mounted inline with the transmission behind the rear
> axel and a short drive shaft..Jim barone 1991 PT
> >
> >
> > -----Original Message-----
> > From: wilfreddrabble
> > To: WanderlodgeForum@yahoogroups.com
> > Sent: Sun, 9 Nov 2008 11:07 pm
> > Subject: [WanderlodgeForum] A newbie's DD questions
> >
> >
> >
> >
> >
> >
> > I know that older DD engines are two strokes with cam actuated
> > exhaust valves but no intakes because they are blower scavenged.
> >
> > I also think I know that the -71 series GM diesels had belt
driven
> > Rootes-type superchargers.
> >
> > Here is my first question:
> >
> > Do all -92 series engines have turbochargers? (ie, not
> superchargers).
> >
> > Second question:
> >
> > On busses with 8V92 engines, are the engines mounted inline or
> > transverse? I know that on the old GM 4610/4710 busses with 6V71
> > engines, the engines were mounted transversely.
> >
> > On 8V92 engined birds, is the transmission ahead of or behind the
> > rear axle?
> >
> > To whoever takes the time to answer this post, MANY THANKS in
> advance!
> >
> > John Alldredge
> >
>

A newbie's DD questions - M Thomas Eastham - 11-10-2008 14:36

71 series blowers are gear driven from the front. Also the governor
is driven off the back of the blower / supercharger on the inline
units (not sure on the v's). There are many non-turbocharged
Detroit 2-strokes in Fire truck, marine, and industrial
applications. I've currently got 5 detroits of various sizes and
only 1 is turbocharged (4-53T).

Thomas
83FC35 SB
Houston, TX
Just back from Seaworld in San Antonio

A newbie's DD questions - Joe Garner - 11-11-2008 13:03

If your interested in the DD 2 strokes check out
the Yahoo group 'Detroit Diesel'. Lots of
knowledgeable people on that group.


HTH, Joe


wilfreddrabble wrote:
>
>
> I know that older DD engines are two strokes with cam actuated
> exhaust valves but no intakes because they are blower scavenged.
>
> I also think I know that the -71 series GM diesels had belt driven
> Rootes-type superchargers.
>
> Here is my first question:
>
> Do all -92 series engines have turbochargers? (ie, not superchargers) .
>
> Second question:
>
> On busses with 8V92 engines, are the engines mounted inline or
> transverse? I know that on the old GM 4610/4710 busses with 6V71
> engines, the engines were mounted transversely.
>
> On 8V92 engined birds, is the transmission ahead of or behind the
> rear axle?
>
> To whoever takes the time to answer this post, MANY THANKS in advance!
>
> John Alldredge
>
> __._,_.