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Allis Chalmers Discussion Forum
:

WD-45 crank in a WC block

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IHC 301

02-12-2011 21:43:38




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I overhauled my styled WC about 6 years ago, and haven't got 60 hours on it. I pull it at local pulls during the summer. It has the 4 1/8" flat top pistons with the stock 4" stroke, and new camshaft. Question is, is there a difference between WD-45 and WC camshafts and camshaft gears? Curious to what I will all have to do to take the stock 4" out and put the 4 1/2 inch stroke in it. Last time I dynoed the tractor, it was putting out 45 horsepower. What kind of power would someone expect from adding another half inch of stroke? Thanks for any input!

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MLPANKEY

02-17-2011 03:51:40




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 Re: WD-45 crank in a WC block in reply to Maine Fordson, 02-12-2011 21:43:38  
yes btus equal hp that comes from airflow and fuel rate . Compression at 13.1 is a 15 percent increase at the same air and fuel rate over a 8.1 compresion so 62 hp plus 15 percent is around 70 then work the head for good airflow size the carb for the airflow demands and your there.



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MLPANKEY

02-14-2011 06:59:44




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 Re: WD-45 crank in a WC block in reply to old, 02-12-2011 21:43:38  
Quoting Removed, click Modern View to see At 13.1 COMPRESSION thats a 14 percent increase by itself over the factory hp rating of the 8.1 175 226 . With carburator and some head work along with being able to tune one makes it verry possible.



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mlpankey

02-13-2011 13:00:19




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 Re: WD-45 crank in a WC block in reply to IHC 301, 02-12-2011 21:43:38  
A 4 1/8 bore 4.5 stroke 175 cam 110 octane with 13.1 compression 85 to 90 hp



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ca+

02-16-2011 20:57:19




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 Re: WD-45 crank in a WC block in reply to mlpankey, 02-13-2011 13:00:19  
85 TO 90 HP on stock stroke? man i need ur dyno!!!



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Mike Bock

02-13-2011 19:14:26




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 Re: WD-45 crank in a WC block in reply to mlpankey, 02-13-2011 13:00:19  
at what rpm.stock rpm. be lucky to get 60 horse



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kip-utah

02-13-2011 11:06:32




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 Re: WD-45 crank in a WC block in reply to IHC 301, 02-12-2011 21:43:38  
There is no need to change WC cam for a 45 cam. They both have exactly the same profile. You have a choice of using "Power Crater" style pistons for a WD45,D17,170, or 175. Or you can use your WC flat tops. Use the same rods for either style piston. If buying new pistons I'd go with 4.125" 175 replacement pistons & sleeves. This is the combo that I run in my WC. Good Luck! Kip



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al-roi

02-13-2011 07:33:02




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 Re: WD-45 crank in a WC block in reply to IHC 301, 02-12-2011 21:43:38  
I have built a couple of these over the years,probably the most bang for your buck. Its 241 cubes,9to1 comp.ratio. I just so happen to have a comp.gauge in my wd-45 with 4.125 flat tops,wd-45 cam and tall head. Cranking p.s.i. of 190lbs.yesterday. 58 horse. Runs best on 4 gallons of 93 and 1 gallon 110 octane fuel mixed.



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jd plowboy

02-13-2011 05:28:02




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 Re: WD-45 crank in a WC block in reply to IHC 301, 02-12-2011 21:43:38  
i sold a wc that had this setup in it. 4 1/8 flat top wc pistons and a wd45 crank. it was 240 cubes and it pulled like a champ. the flat top pistons is the way to go to build your compression up.



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Aaron SEIA

02-13-2011 05:18:55




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 Re: WD-45 crank in a WC block in reply to IHC 301, 02-12-2011 21:43:38  
4 1/8 pistons on a 4.5" crank is 240 cubes. Would need to find some WD45 or newer pistons to work on the longer crank. Everything else stays the same.

AaronSEIA



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farmerwd45

02-13-2011 02:52:50




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 Re: WD-45 crank in a WC block in reply to IHC 301, 02-12-2011 21:43:38  
it will work just fine u will not have to done anything but put it in.4 half inch stroke will put u at 280 cubes from the stock 226 cubes.



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