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Thread: Blowing Out the Turbos
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07-29-2019 03:04 PM #11Senior Member
- Join Date
- Apr 2005
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- 2,826
Re: Blowing Out the Turbos
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Re: Blowing Out the Turbos
Nothing. Somebody was wondering if turbos ever need to be replaced from not being spooled up often enough.
Loading the engine is to burn off the soft soot in the cylinders that comes from prolonged light load operation. The turbos aren't really affected by that.--- The poster formerly known as Scrod ---
I want to live in Theory, everything works there.
1970 36C375
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Re: Blowing Out the Turbos
Offered for visual reference only, no claims as to cause or prevention as the cylinder shown is from a bus. “Bus Greasemonkey” is a often informative series of videos on YouTube. https://m.youtube.com/watch?v=KtaBzPgeKPI
Top Hatt ‘78 43’ DCFB #471 6-71Ns Oakley CA
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07-29-2019 04:19 PM #14Senior Member
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- Apr 2005
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07-29-2019 05:01 PM #15Senior Member
- Join Date
- Jul 2007
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- 1,001
Re: Blowing Out the Turbos
I thought the reason was to get the oil hot enough to burn off the condensation and other impurities.
Michael & Beth
Hull Number CV312
63’ Cockpit Motor Yacht
1986 model launched in August 1987
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Re: Blowing Out the Turbos
If your engine isn't operating at temp a five minute blast isn't going to do it. When you're "cruising" at hull speed you still need to keep the coolant temps up.
--- The poster formerly known as Scrod ---
I want to live in Theory, everything works there.
1970 36C375
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07-29-2019 07:18 PM #17Senior Member
- Join Date
- Jul 2007
- Posts
- 1,001
Re: Blowing Out the Turbos
Yes, 5 minutes is not long enough. I like 1/2 hour at 1950 RPM once a week if we are traveling every day. It is also a good way to monitor the condition of the raw water cooling system. We cruise at 1000/1050 rpm @ 10 mph so we are getting pretty good economy thus we really notice the burn at 1950!
Michael & Beth
Hull Number CV312
63’ Cockpit Motor Yacht
1986 model launched in August 1987
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07-29-2019 07:28 PM #18Senior Member
- Join Date
- Apr 2008
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- 494
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07-29-2019 08:52 PM #19
Re: Blowing Out the Turbos
Maybe with some boats but a 55 convertible with 12V71's run at hull speed won't get up to temp. Im usually 160 max at 9.5 knots. Put her on plane and I get to temp of 180-185. If 160 is the temp I need to get to to reduce issues then I wouldn't ever need to get my boat above 900-1000 RPM. My Detroit/Covington manuals say otherwise
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Re: Blowing Out the Turbos
So I run 800 or so RPM 9 MPH or 8 KTS. Temp is always just slightly under running on plane temp. Ran 26 SM this weekend. Am I good? Can it wait till I am not towing dink to run it up? So confusing. And coolant temp has little to do with true internal core and oil temp.
I agree with what many say, that no one ever wore one out from low RPM use. But also agree they need to be run up to temp over a decent period to run clean and have no moisture internally in the oil system.
Also a big believer in "use it or loose it"! let any marine engine of any type or fuel lay dormant too long and it will have issues. To me the cheapest, best, and certainly most fun way to maintain these is to simply burn some fuel.