fagnaml Report post Posted September 10, 2018 As always, I never complete Motorhome 101 class. Even though I have owned my motorhome for 2-1/2 years, this weekend was the first time I "played" with my Freightliner dashboard "read-outs". I discovered that one of the available read-outs is "Turbo Pressure" which I selected out of curiosity. What I discovered was the turbo pressure while idling is 0 psig with the turbo pressure reaching 27 psig while accelerating from a full stop. This turbo pressure reading makes sense to me i.e. low exhaust gas flow while idling to max exhaust gas flow while accelerating. For reference my engine is a 2007 EPA Cummins 300 HP ISB. My curiosity questions are: 1) Is this turbo pressure range "typical" ? 2) Is turbo pressure a "read-out" worth monitoring ? Thanks for your thoughts. Share this post Link to post Share on other sites
wolfe10 Report post Posted September 10, 2018 1 hour ago, fagnaml said: My curiosity questions are: 1) Is this turbo pressure range "typical" ? ABSOLUTELY 2) Is turbo pressure a "read-out" worth monitoring ? A QUICK INDICATOR OF FUEL BEING USED-- LOWER BOOST, BETTER MPG. ALSO, MONITOR IT OVER TIME. IF MAX BOOST FALLS FIND OUT THE CAUSE (SUCH AS LEAK IN HOSE OR CAC). Thanks for your thoughts. Share this post Link to post Share on other sites
fagnaml Report post Posted September 10, 2018 Brett -- Thanks for the prompt response. My lingering question is "Will I ever complete Motorhome 101 class?" Share this post Link to post Share on other sites
wolfe10 Report post Posted September 10, 2018 Man, I know how hard you are studying, but I am not smart enough to know the answer to that one. Share this post Link to post Share on other sites
hermanmullins Report post Posted September 10, 2018 Not as long as you own a Motor Home. It is what is called continuing and continuing and continuing education. Herman Share this post Link to post Share on other sites
elkhartjim Report post Posted September 10, 2018 Mike, for what its worth, I monitor engine temp, transmission temp and turbo boost. I found a switch on the dash today for the courtesy lights in the bedroom and rear bath. Who knew? Share this post Link to post Share on other sites
obedb Report post Posted September 10, 2018 Will add this/ 27 psi is pretty much normal. On a really chilly day it might approach 30. No living human could possibly teach Motorhome 101. Still struggling with remedial Motorhome classes and that started in 1986 with a rental to be amplified by a purchase in 1988.🙄 , Share this post Link to post Share on other sites
manholt Report post Posted September 10, 2018 Mike. Welcome to the club! As long as you need help here, like me, your in school. The answer is above my "pay scale"! Share this post Link to post Share on other sites
dickandlois Report post Posted September 10, 2018 The path to understanding and knowledge is in the members of the forum! BTDT. The lesson is one a person never forgets and those that are often to comfortable walking out on a limb. Learning never really ends, because there are always changes. Unless one is happy to set and watch the world go by. Rich. Share this post Link to post Share on other sites