On The Road Posted May 21, 2016 Report Share Posted May 21, 2016 I have driven on freeway in Wyoming , Utah and Idaho all day and have been experimenting with speed, mpg, and rpms I have always tried to keep my rpms down to 1500 or below and my fuel mileage has not been that great. I believe my turbo does not kick in until over 1500 rpms. So today I tried running 1600 which puts my speed at 70. Really pulls hills well at this combo and runs really smooth. And I am getting better mpg. Does this sound reasonable? "> 2001 610 Volvo -Volvo power 465HP/1650 -autoshift2009 Smart Passion / cross loaded on Volvo2014.5 Mobile Suite 41 RSSB4VOLUNTEER CHRISTIAN BUILDERS Link to comment Share on other sites More sharing options...
MrSeas Posted May 21, 2016 Report Share Posted May 21, 2016 Here is a recent thread on that very subject...... http://www.rvnetwork.com/index.php?showtopic=123134&view=&hl=&fromsearch=1 Link to comment Share on other sites More sharing options...
On The Road Posted May 21, 2016 Author Report Share Posted May 21, 2016 Thanks MrSeas, I guess I will have to get one of those Scan Gauges. I just assumed the turbo worked at all rpms the same but I get a lot more boost when I go over 1500. I do not have a boost gauge. "> 2001 610 Volvo -Volvo power 465HP/1650 -autoshift2009 Smart Passion / cross loaded on Volvo2014.5 Mobile Suite 41 RSSB4VOLUNTEER CHRISTIAN BUILDERS Link to comment Share on other sites More sharing options...
HERO Maker Posted May 21, 2016 Report Share Posted May 21, 2016 Get one and let us know how it goes. You and I may have the same motor! Volvo here. Rocky & Sheri Rhoades '01 Volvo 770 2016 DRV Mobile Suites, HoustonHERO Makers Ministry Link to comment Share on other sites More sharing options...
GlennWest Posted May 21, 2016 Report Share Posted May 21, 2016 Mine still has the governor on it and has a limit of 65mph which is 1500 rpm. Getting right at 6mpg according to truck. 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
MrSeas Posted May 21, 2016 Report Share Posted May 21, 2016 Thanks MrSeas, I guess I will have to get one of those Scan Gauges. I just assumed the turbo worked at all rpms the same but I get a lot more boost when I go over 1500. I do not have a boost gauge.I didn't mean to say you had to "invest" in a ScanGauge D. I was just pointing you at some info that was along the line of your observations that might be of interest to you. I have the ScanGauge D and it is very useful. Link to comment Share on other sites More sharing options...
On The Road Posted May 21, 2016 Author Report Share Posted May 21, 2016 MrSeas, I have been wanting to get a scan gauge ever since I started reading about them. I do not have a boost or egr gauge. I think it would help me understand the engine boost better and tell me where is the best rpm to drive. I did not say earlier but I have the Volvo D12 engine. 465/1650. It is not governed on speed but the rpms I think are governed. I am getting about 7 1/2 mpg. I am just wondering if I have to drive 55 like in California should I hold 9th gear instead of going to 10th. I have the auto shift . "> 2001 610 Volvo -Volvo power 465HP/1650 -autoshift2009 Smart Passion / cross loaded on Volvo2014.5 Mobile Suite 41 RSSB4VOLUNTEER CHRISTIAN BUILDERS Link to comment Share on other sites More sharing options...
Brad & Jacolyn Posted May 21, 2016 Report Share Posted May 21, 2016 I would be interested also like Rocky says. I have the same engine with a Freedomline. I run about 62 MPH and that is right around 1400 RPM. We get 8 MPG. You will have a good time in CA. We were there last year and I'll tell you that if the sign says 55 MPH when towing that is what you do. We met someone that did not and was stopped in his class A. As far as we know the local LEO's never gave us a second look. Of course we try hard not to do anything obviously stupid to call attention to ourselves. Glenn you will be glad to get the governor reset. It was just a computer setting on our Volvo. Very nice to have much more go when you need to go. Brad Brad and Jacolyn Tucker the Wonder dog and Brynn the Norfolk Terrier 2009 Smart "Joy" 2004 VNL630 "Vonda the Volvo" 2008 Hitch Hiker 35 CK Champagne Edition VED12 465 HP, Freedomline, 3.73 ratio, WB 218" Fulltiming and loving it. Link to comment Share on other sites More sharing options...
HERO Maker Posted May 21, 2016 Report Share Posted May 21, 2016 Glenn, you need to get a list of all the things you need changed in the computer, so that you only pay one time. Weren't you having problems with ABS light being on after singling your truck? I thought that was a computer thing? Not sure about the FL though. Rocky & Sheri Rhoades '01 Volvo 770 2016 DRV Mobile Suites, HoustonHERO Makers Ministry Link to comment Share on other sites More sharing options...
GlennWest Posted May 21, 2016 Report Share Posted May 21, 2016 Yes I still got abs light. Going to today get under truck and push in on all the wheel sensors. Worth a try. 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
MrSeas Posted May 21, 2016 Report Share Posted May 21, 2016 Just as a disclaimer I cannot read EGT's on my ScanGaugeD (Cummins ISX). From what I have read this is an issue on most of the HDT's using a ScanGaugeD. So I added an EGT and Boost gauge. I used this one..... http://www.amazon.com/MaxTow-1500-Pyrometer-EGT-Gauge/dp/B0095YDMMU?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_search_detailpage The EGT probe can be attached via a clamp to the outside of the exhaust manifold so no drilling required. I was able to use an exsisting area in my dash for the placement of the gauge. This is a "universal type" install and should work on any type/make of diesel engine. I also used this for my boost gauge... http://www.amazon.com/MaxTow-60-PSI-Boost-Gauge/dp/B0095ZDFH6?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_search_detailpage It has an electrical "sensor" and you will need a place to "tap" into to get your boost. I was able to use an existing port on my intake manifold. If you prefer you can also order this gauge with a "capillary" (hose) style sensor. Link to comment Share on other sites More sharing options...
beyerjf Posted May 21, 2016 Report Share Posted May 21, 2016 This is Kevin Rutherford 101, they guy on the XM Truckers Channel(Sat-Sun 16:00 to 18:00 EST). I don't agree with alot of what he says, but his conversations about a "sweet spot" for every truck drive train/configuation has it's merits. He is the one who markets his version of a scan guage. I have 2 gauges that came with my truck that have helped me for 1.7 million miles attain the best fuel mileage depending on the situation. 1. Turbo Boost gauge. Indispensable for this purpose. The higher the boost, the more fuel being consumed. 2, Real time fuel use gauge. Most Freighliner Century/Columbia/Argosy dashboards are equipped with a digital version expressed in mpg. Mine happens to be extremely accurate. By using both, anyone here would be able to be a fuel economy champion in short order. Jeff Beyer temporarily retired from Trailer Transit 2000 Freightliner Argosy Cabover 2008 Work and Play 34FK Homebase NW Indiana, no longer full time Link to comment Share on other sites More sharing options...
CDR Posted May 21, 2016 Report Share Posted May 21, 2016 Thanks Jeff; No one believes these are accurate, except the ones that use them. Only available on the Freightliner! Curt 2001 Freightliner Century, 500hp Series 60, Gen 2 autoshift, 3.42 singled rear locker. 2004 Keystone Sprinter 299RLS (TT) 2 & 4 Wheelers! 2013 Polaris Ranger 800 midsize LE Our motto "4 wheels move the body, 2 wheels move the soul!" Link to comment Share on other sites More sharing options...
GlennWest Posted May 21, 2016 Report Share Posted May 21, 2016 Where is the real time MPG on our Freightliners? I found truck log and it shows fuel mileage since last reset. Not seen any real time mpg. Also what is 7mp on my display? 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
On The Road Posted May 22, 2016 Author Report Share Posted May 22, 2016 I would be interested also like Rocky says. I have the same engine with a Freedomline. I run about 62 MPH and that is right around 1400 RPM. We get 8 MPG. You will have a good time in CA. We were there last year and I'll tell you that if the sign says 55 MPH when towing that is what you do. We met someone that did not and was stopped in his class A. As far as we know the local LEO's never gave us a second look. Of course we try hard not to do anything obviously stupid to call attention to ourselves. Glenn you will be glad to get the governor reset. It was just a computer setting on our Volvo. Very nice to have much more go when you need to go. Brad Brad, I am at 70 and about 1600 rpms, 65 at about 1500 rpms 1400 is somewhere around 60-62. I do not get 8 mpgs at 62. I might need to replace my turbo boost sensor. I know some have changed the sensor but have not heard if it helped any. Will the Scan Gauge D plug into the plug under the left side of the dash? "> 2001 610 Volvo -Volvo power 465HP/1650 -autoshift2009 Smart Passion / cross loaded on Volvo2014.5 Mobile Suite 41 RSSB4VOLUNTEER CHRISTIAN BUILDERS Link to comment Share on other sites More sharing options...
MrSeas Posted May 22, 2016 Report Share Posted May 22, 2016 "Will the Scan Gauge D plug into the plug under the left side of the dash?" Yes that's where it plugs in! Also be careful.... some years of Volvo motors do not play well with the ScanGaugeD! Link to comment Share on other sites More sharing options...
jeffw Posted May 22, 2016 Report Share Posted May 22, 2016 "Will the Scan Gauge D plug into the plug under the left side of the dash?" Yes that's where it plugs in! Also be careful.... some years of Volvo motors do not play well with the ScanGaugeD! Yes. I have a 2007 and it would cause the TCS system to fault. The manufacturer said they have problems with 2006-2008 Volvos. 2007 Volvo 780 Volvo D12D, 465hp, 1650 ft/lbs tq., ultrashift Link to comment Share on other sites More sharing options...
Star Dreamer Posted May 22, 2016 Report Share Posted May 22, 2016 Where is the real time MPG on our Freightliners? I found truck log and it shows fuel mileage since last reset. Not seen any real time mpg. Also what is 7mp on my display? Glenn, do you have a bar of lights across the top of the readout that moves to the left under acceleration and to the right when coasting? That is the real time mpg. Dead center would be the 7mpg showing on the readout. More bar to the right means better that 7mpg and more bar to the left is less than 7mpg. You can change that number. Ours showed 10mpg when we got it and I changed it using the onboard menu to a more realistic 9 mpg. Dave 2005 Freightliner Century S/T, Singled, Air ride ET Jr. hitch 2019 46'+ Dune Sport Man Cave custom 5th wheel toy hauler Owner of the 1978 Custom Van "Star Dreamer" which might be seen at a local car show near you! Check out http://www.hhrvresource.com/ for much more info on HDT's. Link to comment Share on other sites More sharing options...
GlennWest Posted May 22, 2016 Report Share Posted May 22, 2016 Need to do some checking on that. Interesting. According to that bar I should be getting better than 7 mpg. According to trip read out it less than 6. I have a lot of blow by. Don't except it to be very good 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
beyerjf Posted May 22, 2016 Report Share Posted May 22, 2016 On the Freightliner "fleet" instrument panel there is no rectangular readout containing the real time mpg readout. The panel in question is right at the top, measures about 1 1/2" by 10" and contains the odometer, real time mpg gauge and numerous(18 at least) square indicator lights(high beam, abs light, check engine, parking brake on, several others depending on options, like mine has an indicator that the kick out steps are not deployed) Jeff Beyer temporarily retired from Trailer Transit 2000 Freightliner Argosy Cabover 2008 Work and Play 34FK Homebase NW Indiana, no longer full time Link to comment Share on other sites More sharing options...
petrel Posted May 22, 2016 Report Share Posted May 22, 2016 Glenn, do you have a bar of lights across the top of the readout that moves to the left under acceleration and to the right when coasting? That is the real time mpg. Dead center would be the 7mpg showing on the readout. More bar to the right means better that 7mpg and more bar to the left is less than 7mpg. You can change that number. Ours showed 10mpg when we got it and I changed it using the onboard menu to a more realistic 9 mpg. Dave I wondered what that display was for. Thanks! 2006 Renegade/Freightliner Coronado 43', Detroit, twin screw, 12spd Link to comment Share on other sites More sharing options...
Brad & Jacolyn Posted May 22, 2016 Report Share Posted May 22, 2016 When I needed to replace my boost sensor there was no doubt about it. The boost would not go over 5 and the power was really bad. It is an easy change on a Volvo. Just about 7 screws and 3 zip ties. Brad Brad and Jacolyn Tucker the Wonder dog and Brynn the Norfolk Terrier 2009 Smart "Joy" 2004 VNL630 "Vonda the Volvo" 2008 Hitch Hiker 35 CK Champagne Edition VED12 465 HP, Freedomline, 3.73 ratio, WB 218" Fulltiming and loving it. Link to comment Share on other sites More sharing options...
beyerjf Posted May 22, 2016 Report Share Posted May 22, 2016 The boost sensor not only goes to a gauge telling you what's happening, if you have one, but it also is one of variables that tells the ECM how much fuel to get to the injectors, and in turn tells them what to do. That is why you lost power when the sensor went bad. The ECM was making decisions on bad information. No telling what it did to fuel economy in the meantime. Jeff Beyer temporarily retired from Trailer Transit 2000 Freightliner Argosy Cabover 2008 Work and Play 34FK Homebase NW Indiana, no longer full time Link to comment Share on other sites More sharing options...
ray.service Posted May 24, 2016 Report Share Posted May 24, 2016 Just as a disclaimer I cannot read EGT's on my ScanGaugeD (Cummins ISX). From what I have read this is an issue on most of the HDT's using a ScanGaugeD. So I added an EGT and Boost gauge. FWIW the EGT on the ISX is "calculated". There is not sensor/probe. Maybe that's why the ScanGuage won't "read" it. Not sure about other Cummins engines. Ray & Deb - Shelbi the Aussie & Lexington the cat2004 Volvo 630 500HP ISX "Bertha D" - 10 Speed-MaxBrake -ET hitch.SOLD2009 Designer 35RLSA SOLDFulltiming since '07 - stopped 2016 Link to comment Share on other sites More sharing options...
MrSeas Posted May 24, 2016 Report Share Posted May 24, 2016 Good to know thanks! Link to comment Share on other sites More sharing options...
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