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Allis Chalmers Discussion Forum
Show Parts for Model:

201 into a 226

Author  [Modern View]
Dave in SC-NE.

08-26-2012 16:48:52
71.31.209.209



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Hi,I have the oppurtunity of getting a 1947 WC. My question, Which I am sure has been asked Hundreds of times on here is this. Will a crankshaft from a 226 (WD 45) Bolt right into the 201? and doe's a person need to use the 226 rod's or Pistons, frontpulley, flywheel? Or can I use all that from my 201. Will the intake/exhaust manifold interchange? I am planning on buying new sleeves and pistons so would appreciate any info. Thanks.

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Aaron SEIA

08-28-2012 14:40:09
67.55.181.57



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
I think an offset grind involves welding up the outside of the rod journal. After that is done, the crank is ground again only this time it is ground for a longer stroke. Can be done to a point to gain stroke without needing the lengthen the actual throw of the crank. No idea how much can be added to the stroke doing this, but thats my understanding of the process.

AaronSEIA



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jd plowboy

08-28-2012 14:48:15
69.160.179.211



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 Re: 201 into a 226 in reply to Aaron SEIA, 08-28-2012 14:40:09  
the welding on the crank is adding stroke to it. offset grinding is you take a 45 crank with has a rod journal size od 2 3/8 inch. you take that and grind off the bottom side of the journal to a 2 inch rod size. that way you are taking 3/8 inch off the bottom and throwing it to the top so you gain 3/8 of and inch stroke making it 4 7/8 inches. the journal has to be ground with the same angle on it as it has and if it is done wrong when you roll the engine the rod will hit the sleeve. you have to get a set of rods from a wd45 buda diesel which has a 2 inch rod journal. then you get a set of wd or wc flattop pistons but the only problem is you have to make a wrist pin bushing cause they are no longer made and make it a floating pin. this puts the piston 400 thousandths from the top of the block.

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Dave in SC-NE

08-27-2012 12:48:24
208.254.241.74



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
OK THANKS GUYS ALL YOUR INFO HELPED ALOT.



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jd plowboy

08-27-2012 12:57:28
69.160.179.252



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 Re: 201 into a 226 in reply to Dave in SC-NE, 08-27-2012 12:48:24  
why cant he use a set of wc or wd flattop pistons in it to build compression.



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Jerry Coulter

08-27-2012 14:21:22
50.40.188.230



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 Re: 201 into a 226 in reply to jd plowboy, 08-27-2012 12:57:28  
Oh yes, it will build compression. It may require purple racing fuel or lots of octane booster and a pull start.



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jd plowboy

08-27-2012 15:28:41
69.160.179.210



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 Re: 201 into a 226 in reply to Jerry Coulter, 08-27-2012 14:21:22  
i run flattops in my wd45 with a offset grind and the piston is 400 thousandth from the top of the block and it will run just as good on 87 as 110 racing fuel.



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Jerry Coulter

08-27-2012 19:46:07
50.40.188.230



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 Re: 201 into a 226 in reply to jd plowboy, 08-27-2012 15:28:41  
What do you mean by offset grind. Now I am intrigued.



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BushogPapa

08-27-2012 12:26:19
173.88.51.117



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
One question..??? When did AC go away from a combustion chamber in the HEAD.?? I know that the WD-45 and D-17 Gas both have a flat head..are all WC's Flat Head..??

For a little more compression, you can put the "D-17" 4 1/8" kit in it.. That will give you 7.4:1 Standard WD-45 gas is originally 6.5:1 7.4 is about the "Limit" for working in the field, but is not critical to tune.. Same price for either piston/sleeve kit.. Probably will require 12Volts to spin it over, or 1/4 turns on the crank...won't be spinning it with that size and compression..but will crank, if you want or need to..

Ron..

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Jerry Coulter

08-27-2012 11:56:42
50.40.188.230



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
The mix and match all will fit, but you need the WD45 manifold, carb and air cleaner to not strangle your potential power. With the 4.5" throw crank, use power crater pistons. Also, we sometimes had to grind a little meat off the block to allow the crank enough clearance to spin.



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Kip-Utah

08-27-2012 09:10:50
75.169.78.156



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
Like Mitch suggested buy a good 4.125" sleeve & piston kit. This over-bore along with the half inch stroke increase will put you right at 240 cubic inch displacement. The bigger bore pistons with the stock 4" stroke crank gives you 217 cid.



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mlpankey

08-27-2012 06:01:29
98.68.179.41



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
Buy the 41/8 over bore. Its a few more cubic inches to.



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Kip-Utah

08-26-2012 20:32:49
75.169.78.156



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
The camshaft is the same in all of these models. There are diferences in how the cam gear bolts on but is of no consequence. The cam profiles are exactly the same. Kip



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Kip-Utah

08-26-2012 20:28:08
75.169.78.156



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
4.5" stroke WD45 crankshaft is a drop in swap in place of the 4" stroke model in the earlier WC & WD models. connecting rods are all the same, but you need to use WD45 pistons. Manifold,head, etc. are all mix & match propositions between all of these models. BTDT, Kip



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Dave in SC NE

08-26-2012 17:20:54
71.31.209.209



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 Re: 201 into a 226 in reply to Dave in SC-NE., 08-26-2012 16:48:52  
Also will I have to use the 226 camshaft?



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