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AC 426 vs. Ford 401 engine?
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KevinON View Drop Down
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Joined: 07 Dec 2009
Location: Schomberg, ON
Points: 798 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KevinON Quote  Post ReplyReply Direct Link To This Post Topic: AC 426 vs. Ford 401 engine?
    Posted: 25 Jun 2011 at 8:23am
Just wondering what your thoughts are on the potential horsepower of these two engines for an 8000lb mod farm class, 3100 rpm, 2.75" charger inlet.  I know that the Ford has a larger head, and inline Simms pump, which could be an advantage.  Any thoughts?
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Lonn View Drop Down
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Joined: 16 Sep 2009
Location: Назарово,Russia
Points: 29792 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lonn Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2011 at 9:03am
I thought the Simms wasn't a very good pump. I have no experience with them though. Back in the late 60's and early 70's the 426 was king in tractor pulls or so I'm told. Even diehard IH fans have told me that.
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KevinON View Drop Down
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Joined: 07 Dec 2009
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Points: 798 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KevinON Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2011 at 9:14am
Right now, in this relatively new class, the IH 407 in a 1256 is the leader.
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firemen View Drop Down
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Joined: 15 Apr 2011
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Points: 74 		Post Options Post Options   Thanks (0) Thanks(0)   Quote firemen Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2011 at 3:26pm
we run the 670 I 426 in our d-21 at stock bore reground cam head work and a mac simpson pump and a few other goodies
 we have no problems runnning with 540 cubic inch engines 
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21406 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2011 at 6:06pm
Use a Genesis 456 engine instead of the 401.
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KevinON View Drop Down
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Joined: 07 Dec 2009
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Points: 798 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KevinON Quote  Post ReplyReply Direct Link To This Post Posted: 25 Jun 2011 at 8:51pm
I forgot to mention that the cube limit is 410, so I would have to decube the 426.  It is just that AC would be my first preference, of course!
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