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04-13-2007, 04:27 PM
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#1
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Winnebago Master
Join Date: Aug 2004
Posts: 530
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Those who have the ISL 400, what do you see on the boost pressure gauge? At wot (wide open throttle) climbing a hill. The most I have seen is @ 35 psi, is that normal? The gauge goes to 50, should I be seeing more?
Thanks
Jim
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2011 Mobiles Suites, 2011 Chevy 3500 Dually
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04-13-2007, 04:27 PM
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#2
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Winnebago Master
Join Date: Aug 2004
Posts: 530
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Those who have the ISL 400, what do you see on the boost pressure gauge? At wot (wide open throttle) climbing a hill. The most I have seen is @ 35 psi, is that normal? The gauge goes to 50, should I be seeing more?
Thanks
Jim
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2011 Mobiles Suites, 2011 Chevy 3500 Dually
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04-13-2007, 05:14 PM
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#3
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Winnebago Owner
Join Date: Jul 2005
Posts: 162
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I don't own a Cummins powered MH right now, got a yellow engine. Worked for Cummins for many years and 30 to 35 psi is about right for that application. Have seen piston air craft engines go as high as 50 inches of mercury.
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04-14-2007, 12:11 AM
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#4
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Winnebago Master
Join Date: Jan 2005
Location: Back at the ranch
Posts: 2,041
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I have seen our ISL go briefly to 50 inches and then back off to about 25 and then down from there. Punching into a 30 mph wind last summer out West our boost stayed at 25 inches for hours I think our fuel economy was down to about 5.5 for that run.
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--John
2005 Horizon 40AD, 2005 Jeep Liberty CRD
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04-14-2007, 03:41 AM
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#5
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Winnebago Watcher
Join Date: Nov 2004
Location: Florida
Posts: 4
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I wish I had a boost pressure gauge. I don't have a tranny temperature gauge either. I really miss both.
Dennis
05 39f dp
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Dennis, SW Florida
05 Journey 39f DP
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04-14-2007, 03:48 AM
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#6
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Winnebago Master
Join Date: Aug 2004
Posts: 530
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Thanks for the info.
Jim
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2011 Mobiles Suites, 2011 Chevy 3500 Dually
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04-15-2007, 01:21 PM
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#7
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"Formerly Diplomat Don"
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 14
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jimandsue60....My gauge goes to 30 and at full boost, the dial goes past 30 to where 35 would be if there was one.
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Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
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04-15-2007, 02:10 PM
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#8
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Winnebago Master
Join Date: Aug 2004
Posts: 530
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I found that I actually have 2 boost indicators. The gauge on the dash and an electronic one that comes up with engine parameters in the electronic display. I will monitor that during our travels tomorrow.
Thanks
Jim
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2011 Mobiles Suites, 2011 Chevy 3500 Dually
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04-16-2007, 04:38 AM
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#9
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Winnie-Wise
Join Date: Sep 2002
Location: Fallbrook, Ca
Posts: 307
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DenShaw,
If you run a laptop or have one, look into the VMSpc engine monitoring software from a company named Silverleaf. It is really inexpensive, works great, and gives you more engine diagnostics than you know what to do with. I have a few pics in my gallery of what the software looks like. Well worth the money.
Sarge
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04-16-2007, 11:19 AM
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#10
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Winnebago Master
Join Date: Aug 2004
Posts: 530
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I watched the digital display and it showed 37 Psi a couple of times, all is good.
Thanks
Jim
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