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+--- Thread: rear-end ratio - follow-up (/showthread.php?tid=3415)
rear-end ratio - follow-up - mogoone - 09-12-2006 13:35
I think I messed up, again! The RPMs for 64.8 mph are listed at
1800. Is this rpm level sufficient to keep everything properly
cooled, lubed, etc.? There, I think that covers everything.
Tom Goodson
Mogoone
rear-end ratio - follow-up - Leroy Eckert - 09-12-2006 15:23
Tom:
I do not know the gear ratio of my coach, perhaps I could find it on Vintage
Birds but it's not important to me. That information would only clutter the C
drive capacity I may need for numerous other complex systems on the Bird, I
know my top speed, boost and pyro temps at various other speeds. In my
opinion, BB engineers have done a great job over the years as evidenced by the
numerous Birds on the road today. Follows are some actual average figures on
my bus--from memory.
Flat land with 20ft flatbed trailer hauling a 92- Z-28 Camero Conv- Total
weight approx 48,000lbs
Top speed- approx 80mph---boost 12lbs--pyro--650 or greater--RPM-2200--fuel
economy unknown, probably not good.
Cruise Speed in the right 2 lanes if available--68mph--boost 7.5lbs--pyro
550--RPM 1900--fuel economy--approx 6mpg
We have bunny hills in the South. The Bird does well. I haven't been to the
West in the Bird but would anticipate very good performance when we go next
summer.
Hope this helps;
.
Leroy Eckert
1990 WB-40
Niceville, FL
8v92--Allison 5 Speed
----- Original Message -----
From: mogoone
To: WanderlodgeForum@yahoogroups.com
Sent: Tuesday, September 12, 2006 8:35 PM
Subject: [WanderlodgeForum] rear-end ratio - follow-up
I think I messed up, again! The RPMs for 64.8 mph are listed at
1800. Is this rpm level sufficient to keep everything properly
cooled, lubed, etc.? There, I think that covers everything.
Tom Goodson
Mogoone
[Non-text portions of this message have been removed]
rear-end ratio - follow-up - Gregory OConnor - 09-13-2006 03:25
Leroy, my 94 has a Info plate on the rear frame crossmember ;above
the trailer hitch reciever ;behind the rear bumper. It lists info on
ratio , axles, hubs limits. MikeH and JeffM refer to ratio's for the
birds engineered when speed limits were 55. Makes good sence to
change them as keeping up with the faster 65/70 mph speeds would now
over R the engine.
80 MPH and a copilot 15 years your junior, doesnt sound like you
fish or play chess.
Gregory O'Connor
94ptRomoland
--- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert"
>
>
> Tom:
> I do not know the gear ratio of my coach, perhaps I could find it
on Vintage Birds but it's not important to me. That information would
only clutter the C drive capacity I may need for numerous other
complex systems on the Bird, I know my top speed, boost and pyro
temps at various other speeds. In my opinion, BB engineers have
done a great job over the years as evidenced by the numerous Birds on
the road today. Follows are some actual average figures on my bus--
from memory.
>
> Flat land with 20ft flatbed trailer hauling a 92- Z-28 Camero Conv-
Total weight approx 48,000lbs
>
> Top speed- approx 80mph---boost 12lbs--pyro--650 or greater--RPM-
2200--fuel economy unknown, probably not good.
> Cruise Speed in the right 2 lanes if available--68mph--boost 7.5lbs-
-pyro 550--RPM 1900--fuel economy--approx 6mpg
> We have bunny hills in the South. The Bird does well. I haven't
been to the West in the Bird but would anticipate very good
performance when we go next summer.
> Hope this helps;
> .
> Leroy Eckert
> 1990 WB-40
> Niceville, FL
> 8v92--Allison 5 Speed
>
>
> ----- Original Message -----
> From: mogoone
> To: WanderlodgeForum@yahoogroups.com
> Sent: Tuesday, September 12, 2006 8:35 PM
> Subject: [WanderlodgeForum] rear-end ratio - follow-up
>
>
> I think I messed up, again! The RPMs for 64.8 mph are listed at
> 1800. Is this rpm level sufficient to keep everything properly
> cooled, lubed, etc.? There, I think that covers everything.
>
> Tom Goodson
> Mogoone
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
rear-end ratio - follow-up - Leroy Eckert - 09-13-2006 08:20
Hey Greg:
Learning is great. I didn't consider the old speed limit, and for grins I'll
check out the tags. I think there are two or three back there.
Fish? I fish at the seafood market. Chess?-nah! Hooters-yes. The war
department keeps me in line most of the time. Good to hear from you. I always
get a laugh. LOL
Thanks,
Leroy Eckert
1990 WB-40
Niceville, FL
----- Original Message -----
From: Gregory OConnor
To: WanderlodgeForum@yahoogroups.com
Sent: Wednesday, September 13, 2006 10:25 AM
Subject: [WanderlodgeForum] Re: rear-end ratio - follow-up
Leroy, my 94 has a Info plate on the rear frame crossmember ;above
the trailer hitch reciever ;behind the rear bumper. It lists info on
ratio , axles, hubs limits. MikeH and JeffM refer to ratio's for the
birds engineered when speed limits were 55. Makes good sence to
change them as keeping up with the faster 65/70 mph speeds would now
over R the engine.
80 MPH and a copilot 15 years your junior, doesnt sound like you
fish or play chess.
Gregory O'Connor
94ptRomoland
--- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert"
>
>
> Tom:
> I do not know the gear ratio of my coach, perhaps I could find it
on Vintage Birds but it's not important to me. That information would
only clutter the C drive capacity I may need for numerous other
complex systems on the Bird, I know my top speed, boost and pyro
temps at various other speeds. In my opinion, BB engineers have
done a great job over the years as evidenced by the numerous Birds on
the road today. Follows are some actual average figures on my bus--
from memory.
>
> Flat land with 20ft flatbed trailer hauling a 92- Z-28 Camero Conv-
Total weight approx 48,000lbs
>
> Top speed- approx 80mph---boost 12lbs--pyro--650 or greater--RPM-
2200--fuel economy unknown, probably not good.
> Cruise Speed in the right 2 lanes if available--68mph--boost 7.5lbs-
-pyro 550--RPM 1900--fuel economy--approx 6mpg
> We have bunny hills in the South. The Bird does well. I haven't
been to the West in the Bird but would anticipate very good
performance when we go next summer.
> Hope this helps;
> .
> Leroy Eckert
> 1990 WB-40
> Niceville, FL
> 8v92--Allison 5 Speed
>
>
> ----- Original Message -----
> From: mogoone
> To: WanderlodgeForum@yahoogroups.com
> Sent: Tuesday, September 12, 2006 8:35 PM
> Subject: [WanderlodgeForum] rear-end ratio - follow-up
>
>
> I think I messed up, again! The RPMs for 64.8 mph are listed at
> 1800. Is this rpm level sufficient to keep everything properly
> cooled, lubed, etc.? There, I think that covers everything.
>
> Tom Goodson
> Mogoone
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
rear-end ratio - follow-up - mogoone - 09-13-2006 12:30
Leroy,
Thanks for the input. The terminology "boost" and "Pyro" sound a lot
like a shuttle launch to me. It is probably best for me if I heed
your comment about the competence of the BB engineers, and just assume
that they have built what is best/most efficient.
Tom Goodson
Mogoone
rear-end ratio - follow-up - Leroy Eckert - 09-13-2006 14:22
Tom:
Didn't you know it's what you do with these monsters, launch them? You sure as
@#$% can't turn um. LOL just kidding. O'Conner had a good post regarding
older speed laws, gear retrofits and the placement of info tags etc. Since you
asked specifically about a 1990 PT I passed along what my coach does on the
highway. Boost is the turbo charger inlet pressure applied. Pyrometer is the
temperature of the exhaust gas measured at the position of the sensor near the
turbo charger. In an airplane it's called EGT. Peddle to the metal creates
higher boost and higher temperatures. Generally bad on the equipment. You
probably knew all of that already.
Sooooo, I cruise along about 68MPH talking to the wife while watch'n satellite
TV. Might get there 30 minutes late but the beer is really cold.
Good luck in your search.
Leroy Eckert
1990 WB-40
Niceville, FL
----- Original Message -----
From: mogoone
To: WanderlodgeForum@yahoogroups.com
Sent: Wednesday, September 13, 2006 7:30 PM
Subject: [WanderlodgeForum] Re: rear-end ratio - follow-up
Leroy,
Thanks for the input. The terminology "boost" and "Pyro" sound a lot
like a shuttle launch to me. It is probably best for me if I heed
your comment about the competence of the BB engineers, and just assume
that they have built what is best/most efficient.
Tom Goodson
Mogoone
[Non-text portions of this message have been removed]