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Old 06-26-2014, 09:50 AM   #1597
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Gilleshps - Very nice find! What a nice example of a classic DP.....
Thank you very much ahicks!
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Old 06-26-2014, 10:22 AM   #1598
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We've been all over the country with out 275hp Cat. I never felt it was lacking, even with the Honda in back of it. In traffic, we're right at home running in the middle of the pack with the semi's. Pass some, get passed by others. We do generally get there in pretty good shape, and get reasonable mpg....
I don't think I'm getting WOT on the pedal. The books shows 2800 max RPM in park and I'm only getting 2500. So I guess that could be part of the problem? On the flats I have no problems at all, I can set the cruise at 62-65 with the toad @1900-2000 rpm. But a 6% grade and I'm down to 25mph. She runs about 10lbs boost when WOT max. Do you think that's normal?
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Old 06-26-2014, 11:50 AM   #1599
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Not an expert, would hate to mislead you with wrong info. You'll need to do some digging for that. Meanwhile, have patience!
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Old 06-26-2014, 11:11 PM   #1600
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I don't think I'm getting WOT on the pedal. The books shows 2800 max RPM in park and I'm only getting 2500. So I guess that could be part of the problem? On the flats I have no problems at all, I can set the cruise at 62-65 with the toad @1900-2000 rpm. But a 6% grade and I'm down to 25mph. She runs about 10lbs boost when WOT max. Do you think that's normal?
My executive has only 190HP. I've only owned it a few months and have been fixing odds & ends. I've not had it on a grade yet, but 25mpg is kinda what I was expecting. I have a full size Ford Bronco I'd really like to use as a toad, but it don't think the rig has enough power.
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Old 06-27-2014, 09:01 AM   #1601
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Is that a non turbo 3208 or the 5.9 cummins? I'm assuming you meant MPH (not mpg?) that would be great mileage.
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Old 06-27-2014, 09:29 AM   #1602
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My rig weighs 23000 with a cummins triple nickel pushing it around. I turned up the pump a bit so I am probably at about 240 horse. I can't imagine pulling something as heavy as a E250, my little 2800 lb 1961 Mercedes slows me down plenty. 9 MPG with a toad and 10 MPG without. Found a jake brake setup and it's always on for the downhill runs.
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Old 06-27-2014, 10:58 AM   #1603
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I love the Foretravel's too! I seem to get 8.5mpg pulling a toad, 22' trailer or not towing anything. It is a little heavy for a toad, but I'm not retired yet so it's also my work vehicle. Fulltimer too!
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Old 06-27-2014, 06:49 PM   #1604
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Is that a non turbo 3208 or the 5.9 cummins? I'm assuming you meant MPH (not mpg?) that would be great mileage.
5.9 Cummins. Yes, I meant MPH. Mileage is in the 10-ll mpg
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Old 06-27-2014, 06:53 PM   #1605
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My rig weighs 23000 with a cummins triple nickel pushing it around. I turned up the pump a bit so I am probably at about 240 horse. I can't imagine pulling something as heavy as a E250, my little 2800 lb 1961 Mercedes slows me down plenty. 9 MPG with a toad and 10 MPG without. Found a jake brake setup and it's always on for the downhill runs.
I'd love a exhaust brake for mine, but I've been told the 6BT can't have one without changing exhaust springs. Makes it a very expensive option.
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Old 06-28-2014, 12:21 AM   #1606
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I'd love a exhaust brake for mine, but I've been told the 6BT can't have one without changing exhaust springs. Makes it a very expensive option.
Yeah your exhaust brake has to be set under the valve spring rating or you will float your exhaust valves and break something. I think that Cummins came stock with somewhere around 30 lb springs and 20 or 25 lb exhaust back pressure won't do much to slow you down. One of the nice things about my Cummins is that it's the early style medium truck motor and has cam driven injectors with the PT fuel system which makes a true Jake Brake possible. Of course that motor is also known for dropping sleeves and breaking crankshafts but you can't have everything
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Old 06-28-2014, 12:25 AM   #1607
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I don't think I'm getting WOT on the pedal. The books shows 2800 max RPM in park and I'm only getting 2500. So I guess that could be part of the problem? On the flats I have no problems at all, I can set the cruise at 62-65 with the toad @1900-2000 rpm. But a 6% grade and I'm down to 25mph. She runs about 10lbs boost when WOT max. Do you think that's normal?
10 lbs of boost for a 3208 is plenty

What is your final drive ratio? 1900 rpm seems awful slow for a 3208 at cruise. It would be happier at 2400 to 2600 at that speed Perhaps your tach is a bit off?
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Old 06-28-2014, 08:55 AM   #1608
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I'm not sure what the ratio is but I'll pull the book out and see if I can find it, then I will post it. As far as the tach, I guess it could be off a little but it idles at 7-800RPM which I believe is proper as per the cat specs.

The boost gauge redline's at 12lbs so you're right, that 10lbs seems to be the norm.

Thank you, I appreciate your support.
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Old 06-28-2014, 09:35 AM   #1609
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I'm not sure what the ratio is but I'll pull the book out and see if I can find it, then I will post it. As far as the tach, I guess it could be off a little but it idles at 7-800RPM which I believe is proper as per the cat specs.

The boost gauge redline's at 12lbs so you're right, that 10lbs seems to be the norm.

Thank you, I appreciate your support.
If that's a pusher, it may have an alternator driven tach which could easily be 200 RPM off. Mine changes by at least 100 RPM when I turn the lights on due to the miles of wire and resistance losses in my aged 37 foot rig
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Old 06-28-2014, 10:29 AM   #1610
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Haha, that's very possible. I was on a trip to lake Powell in 2011 and monitoring all the gauges throughout the trip. As I slowed down approaching a stop, then came to a complete stop, my gauges were still 65MPH and about 2000RPM. Turns out a fuse blew and all the gauges froze where they were.

I'll look into a portable tester and double check the rpm as well.
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