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56 Century Boat with Chrysler Hemi
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Beltran
Posted 2018-11-27 6:17 PM (#574230)
Subject: 56 Century Boat with Chrysler Hemi



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Don't see these too often. This is how I got my two Hemi engines.

https://www.ebay.com/itm/264061611074?ul_noapp=true

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56D500boy
Posted 2018-11-27 6:34 PM (#574231 - in reply to #574230)
Subject: RE: 56 Century Boat with Chrysler Hemi



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And there is that 2 x 1 bbl manifold again. Interesting that the exhaust valves were sodium-filled like the D501 engine.

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LD3 Greg
Posted 2018-11-27 8:11 PM (#574243 - in reply to #574231)
Subject: RE: 56 Century Boat with Chrysler Hemi


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All the marine hemis I have had experience with had sodium cooled exhaust valves. This one looks to be a 331.

Greg
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Powerflite
Posted 2018-11-28 12:46 AM (#574262 - in reply to #574230)
Subject: Re: 56 Century Boat with Chrysler Hemi



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How can you tell the difference between the 331 & 354 from the picture? These motors also came with solid lifters & adjustable rockers. That's how I obtained one of my sets too. I sold the marine valve covers for the same amount I bought the whole motor for.
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LD3 Greg
Posted 2018-11-28 7:20 AM (#574266 - in reply to #574262)
Subject: Re: 56 Century Boat with Chrysler Hemi


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I don't think they built the 354 with anything but single or dual 4bbl carbs. The two singles were common on the 331.

Greg
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58coupe
Posted 2018-11-28 1:11 PM (#574283 - in reply to #574230)
Subject: Re: 56 Century Boat with Chrysler Hemi



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Sodium cooled valves and exhaust rotaters were very common in gasoline truck engines. The engines were worked much harder than in a car and this made the exhaust valves last longer without burning. The same concept applied to marine engines.
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Powerflite
Posted 2018-11-28 1:17 PM (#574284 - in reply to #574266)
Subject: Re: 56 Century Boat with Chrysler Hemi



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LD3 Greg - 2018-11-28 4:20 AM
I don't think they built the 354 with anything but single or dual 4bbl carbs. The two singles were common on the 331.
Greg


That's not true. According to what has been published about them, the numbers on the marine blocks were

M45S 331 2X1
M45S-3 354 2X1
M45SP-? 354 1x4 (Canada)
M45SP-3 354 2X4

In fact, my marine 354 originally came with a 2x1 manifold on it, and the tug boat it came out of had 2 motors; one right, and one left. Both were configured the same, except for the rotation direction.
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Beltran
Posted 2018-11-28 7:05 PM (#574302 - in reply to #574230)
Subject: Re: 56 Century Boat with Chrysler Hemi



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Same as Powerflite. My engines were Marine APV motors. left and right. one 331 and one 354, a replacement motor, to the original it seems. but both had 2 x 1bbl carbs.
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