High altitude
 

High altitude

Started by chessie4905, June 24, 2018, 04:13:10 AM

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chessie4905

Just thought about this today. Coach engines not turboed get wheezy at high altitude. How well do your generators do at altitude, since they aren't turbocharged? Gas vs. diesel? Have never seen this mentioned.
GMC h8h 649#028 (4905)
Pennsylvania-central

luvrbus

Cummins has the info on their site on how altitude and heat both affect the performance of a generator with propane,gasoline and diesel I thought was covered several times here 
Life is short drink the good wine first

Oonrahnjay

Quote from: luvrbus on June 24, 2018, 05:16:57 AMCummins has the info on their site on how altitude and heat both affect the performance of a generator with propane,gasoline and diesel ... 

     I have Cummins/Onan 10K "Quiet Diesel" (non-inverter).   I looked at this data when I bought it and was first looking through the printed stuff.  I was surprised how big the effect is.  It doesn't come in much for East Coast altitudes, but many places in the western US/Canada are places where performance will really fall off.
Bruce H; Wallace (near Wilmington) NC
1976 Daimler (British) Double-Decker Bus; 34' long

(New Email -- brucebearnc@ (theGoogle gmail place) .com)

luvrbus

The turbo's don't help much on the small engines other than making one quieter,the entertainer people just oversize their generator to compensate or use 2   
Life is short drink the good wine first

chessie4905

Do the diesel gens smoke a lot at those altitudes? I know they drop in output but wondered how they acted in real time use for users...voltage, engine temp, etc.
GMC h8h 649#028 (4905)
Pennsylvania-central

luvrbus

They do smoke a little more it is more noticeable on the ground for most RV, the old Perkins will smoke a lot it is very noticeable and one can smell it 
Life is short drink the good wine first

TomC

Diesel generators are not a problem at high altitude-all you'll get is less power and you'll figure that out when you start seeing black smoke-use that as your guide to how much load you can put on.
Gasoline generators are another story. Unless it is electronically fuel injected, you'll have to screw in the main jet to let it run. I had an Onan 6.5kw Emerald III Commercial on my big rig and at anything over 4,000ft, had to screw in the main jet on the carb just to allow it to run. Just remember to screw it back out when you come back down. Good Luck, TomC
Tom & Donna Christman. 1985 Kenworth 40ft Super C with garage. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Gary Hatt - Publisher BCM

This is what I take when I get Wheezy.  Have you tried putting a couple of these in the fuel tank?   ;D

1999 Prevost H3-45
Gary@BusConversionMagazine.com

Van

B&B CoachWorks
Bus Shop Mafia.
Now in N. Cakalaki

chessie4905

I still use mothballs.  lol
GMC h8h 649#028 (4905)
Pennsylvania-central

Sebulba

Back to the U.S. after 8 years in Europe.  
Bought a 1997 MCI 102D3 with Allison B500 on November 17, 2021 in Syracuse, NY.  Commenced living it that day and  drove it to Florida and New Mexico.  Converting as we go.  https://basicsuds.com