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From: Mike Maurice (no email)
Date: Sun Oct 02 2005 - 21:25:47 EDT
"David&Joan" <>
At 10:46 AM 10/2/2005 -0700, you wrote:
>As others have said, why bother. Most turbocharged diesels develop no boost
>until over 1,800 rpm. Below this rpm it is as if there is no turbo. I assume
>that you have a semi-displacement boat with a high output diesel and want to
I have been running boats on delivery trips at modest speeds due to
the extremely high price of diesel. For instance, a pair Cummins 6.2
500 hp, turbocharged engines at 12-1400 rpm. We had some problems
with the starboard engine failing to turn up to WOT on the last trip,
apparently due to running for 12-24 hours at these low rpm's. It took
some coaxing to get the turbo to give proper boost. At first it did
not want to climb over 1800 rpm. I attribute this to unburned fuel or
maybe soot on the turbo wheel. This boat shows a LOT of soot on the
transom and is going to get smaller injector nozzles, real soon.
I have seen problems like this many times over the years. You run
turboed engines at slow speeds for long periods at the risk of
damaging the turbo. My opinion.
Regards,
Mike
Capt. Mike Maurice
Tualatin(Portland), Oregon
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