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Old 03-04-2017, 12:49 PM   #1
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Underpowered

Anybody have experience in changing or adding a power chip in my 40' Charleston with a 300 hp diesel,. On the flat it's OK but on the hills I'm spending most my time in 3rd gear. If I could get to 4th that would be great.
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Old 03-04-2017, 06:58 PM   #2
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What engine and transmission do you have? Should do better then stated.
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Old 03-04-2017, 07:13 PM   #3
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It's the c7 cat 6 speed, 40' 2006 Charleston with 4 slides. Only 32,000 miles
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Old 03-04-2017, 08:20 PM   #4
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We have a 2007 Charleston 40QS with the 330 hp Mercedes and have plenty of power and pull on the big grades with a toad. I'm not going to BS you as some would that I pull the big hill at 70 but will say I can pull steady at 45 to 50 mph on most of the long steep grades. I run on at around 65 which seems to be my sweet spot but in the mountains I will downshift and yes allot of times it will be in 4th gear. Your engine should have plenty of power to do the same but the Mercedes torque curve does come in sooner which does make a difference. If we want to run with the big boys in the left lane we need to get up in the 500hp range . Check your fuel filters and make sure that the transmission is programmed for your c7.
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