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616 ,720 hp. differance

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HudCo View Drop Down
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Joined: 29 Jan 2013
Location: Plymouth Utah
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Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Topic: 616 ,720 hp. differance
    Posted: 24 Oct 2021 at 4:38pm
what makes up the hp differance between the ccka and the cckb i know the charging system is differant but that would not make any differance  is it just the carb and manifold?
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Bird76Mojo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bird76Mojo Quote  Post ReplyReply Direct Link To This Post Posted: 25 Oct 2021 at 9:25am
I'm no expert, but being a 616-720 owner, that is my understanding after years of research. The primary difference being a downdraft carb vs a side-draft carb.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote coggonobrien Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2022 at 9:30am
intake manifold is long runner vs short runner as well, air velocity = cfm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote talntedmrgreen Quote  Post ReplyReply Direct Link To This Post Posted: 28 Apr 2022 at 10:41am
The engines are also spec'd to run at different RPM's.  The CCKB achieves max power with a higher max rpm spec.  I have not known this to be an issue in the tractor world, but if you poke around Onan engine/generator forums, you will find many jokes about wearing a catcher's mitt when running a CCKB, due to the flying rods. 
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HudCo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 28 Apr 2022 at 11:19pm
i have a cckb engine here i do not even know if it runs or not but i just got gaskets to put the b manifold and carb on 
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