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block comparison-844 vs 731 |
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Dale ![]() Silver Level ![]() Joined: 11 Sep 2009 Location: Ontario Points: 375 |
![]() ![]() ![]() ![]() ![]() Posted: 13 Apr 2012 at 9:17pm |
I suspect I know the answer but here goes. Can a block from an Allis 844 engine be used to replace a block from a 731 Allis engine.
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CAL(KS) ![]() Orange Level ![]() Joined: 18 Sep 2009 Location: Chapman, KS Points: 3804 |
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if your referring to the engine use in 8550 and 4W305 then i would say yes. major differences should be in crank (stroke) and compression height of pistons and maby rods not sure. otherwise only minor differences like exhaust manifolds (731 has 2) for twin turbo and different turbo piping. intake manifold maby be different for turbo piping also.
this would apply to later 844 blocks like 17000-25000 motors. early 16000 and 21000 and buda 844 blocks have smaller main journals. My 59 HD16 has 16000 and bearings are not available
i think the blocks are identical, hopefully some one who knows for sure will chime in.
the 731 is just a destroked 844 Edited by CAL(KS) - 13 Apr 2012 at 10:26pm |
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
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DrAllis ![]() Orange Level Access ![]() Joined: 12 Sep 2009 Points: 21854 |
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I would guess ( and it is only a guess) that if they were both built new at the same time in history, they would be the same.
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tbran ![]() Orange Level ![]() Joined: 14 Sep 2009 Location: Paris Tn Points: 3522 |
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I have a block , 731 , out of an 8550 . Cheap. |
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Dale ![]() Silver Level ![]() Joined: 11 Sep 2009 Location: Ontario Points: 375 |
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Might be interested in that. Can you PM me of the price and details. Thanks
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