You should be able to cruise @ 20kts!
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Thread: 53MY Repower
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11-12-2021 01:04 PM #21Senior Member
- Join Date
- Dec 2014
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- 415
Re: 53MY Repower
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11-19-2021 09:10 PM #23
Re: 53MY Repower
Was there something wrong with the Detroits or you just wanted more power? Which I can totally understand.
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Re: 53MY Repower
That's an interesting engine- has a 'radial supercharger", which I'm assuming is a centrifugal blower. This doesn't look related to any of the Cat engines I've seen before.
They are bound to be lighter than the DDs that came out, which will get you some speed as well. Can you stick with your old shaft size or do you have to go up?
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Re: 53MY Repower
I wonder if the blower can be turned off for trolling or economy at hull speed. Servicing both of the filters seems a bit challenging.
Regards
Dan
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Re: 53MY Repower
I had 5000hrs on the 6v92's so it was time to do something. There is very little weight savings, maybe 600lbs total. The super charger is clutch driven. It disengages at higher RPM so that it is not a parasitic drain once the turbo spools up. So the torque is pretty consistent throughout the RPM range.
Since only tier 3 emission engines can be sold now, Cat can't sell the C12 and a few others in the US market so they partnered with FPT for the C8.7 and C12.9 engines.Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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Re: 53MY Repower
Interesting.. someone else had a similar design, with a supercharger that freewheeled when the turbo boost came up. Might have been Volvo- I can't recall.
Very keen to see the photos and the performance numbers on this.
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Re: 53MY Repower
And yes, we are increasing shaft size from 2" to 2.5"
I'm dropping off the struts to the shop to use as patterns to make the new ones. They did this same job for another forum member when he installed 3:1 reduction gears in his 53ED.Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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11-22-2021 12:45 PM #30Senior Member
- Join Date
- Dec 2014
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- 415