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Old 12-23-2008, 05:15 PM   #9
rdlamb
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Join Date: Jun 2007
Posts: 386
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Hi Jhan;
I have the 400 Cummins. Got a recall notice from Cummins notifying me that they wanted to put a light on my dash to warn me that my engine just blew. It seems they utilized a "new supplier" of wrist pins, and said pins were not correctly milled.
I wrote a nasty letter to Cummins, and they overhauled my engine instead. The mechanic noted my wrist pins, with 13000 miles on them, were "excessively worn."
The reason I note this, is that the Cummins shop I went to offered me a computer upgrade, normally $2000, to reprogram everything to boost the Cummins to 450hp.
I was happy with the 400, but went ahead with the 450 boost. Wow, yes more is better in this case.
MPG went down initially during break in of the new parts.
Now, we manage 7.6 to 8.4 mpg, down to 6.8 mpg on hills or hilly terrain.

You might want to check with MB, to see if they offer a way to boost your HP, then decide if it makes sense for you.



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Safe Travels
Rick
07 TM 40D;ISL 450 Cummins(upgraded). Very happy w/coach
Gnarly toad to scoot around.
Geocaching, hiking, fishing, National Parks, Civil War sites.
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