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Tractor Talk Discussion Forum

Repowering a W9

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Russ Schultz

01-22-2004 16:55:54




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Im going to repower my 1940 McCormick W9 with a '74 Buick 350 and heavy duty Automatic transmission (which will be coupled in front of the original IH transmission). I will use it at our local small town tractor pulls. Any Ideas? Anyone done a conversion like this before?

Thanks,
Russ




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Russ Schultz

01-24-2004 22:03:28




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 Re: Repowering a W9 in reply to Russ Schultz, 01-22-2004 16:55:54  
Hello Again, I had a look at the Tractor today. If I don't run a fan or fan shroud, The engine & Auto Tranny will fit in with 3/4" of room from the Water pump pulley to the Radiator without extending the frame. To cool the engine, I will run an electric fan in front of the radiatior. I will also be installing a Govenor on it that was from a 510 Massey Combine, and setting it to max out at 3000-3500 RPM. To prevent Transmission slippage, I'm installing a Manual Lock-Up torque converter. Keep the Ideas & comments coming !

Thanks,
Russ

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Mike (WA)

01-23-2004 08:18:51




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 Re: Repowering a W9 in reply to Russ Schultz, 01-22-2004 16:55:54  
Swapping to an automotive engine with automatic tranny, and leaving the original transmission in place, was a favorite for the old Cats, Cletracs, etc, in which the original engine turned something like 900 RPM. The additional gear reduction in low on the auto tran. would get ground speed down to where it should be, with the added benefit of a no-clutch "shuttle" between reverse and first. Only problem was you had to use a foot throttle so you could idle down during the shift. A big block GM V8 will run a D-6 or D-7 very nicely.

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Mike

01-22-2004 22:40:17




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 Re: Repowering a W9 in reply to Russ Schultz, 01-22-2004 16:55:54  
A neighbor installed a 350 Olds with turbo 350 in his TD 14 crawler with blade. Works great. He did what you are considering,left the regular transmission in place. Didn't look it over real close to see if he used a governor or the regular throttle and just be careful not to over rev the engine. Another neighbor uses his W9 for all out pulling. Uses a high performance 460 Ford with C6 automatic. Removed the original transmission and rearend. Uses a two ton military truck rearend. A real puller. I am in the process of installing a 455 Olds with turbo 400 in my WD9. Original engine is shot as the previous owner disassembled it and left it outside uncovered for about 5 years.
I did something like this about 24 years ago. Installed a 455 Olds with turbo 400 in '59 GMC 2 ton truck. Didn't know how the transmission would stand up as it was just a stock transmission from a '68 Olds 88 but iy stood up real well. I did install the air conditioner condenser from the car in front of the radiator and run the transmission oil through it. Well satisfied with it. Just a little too high geared in first and reversed for off road use.

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r4etired

01-22-2004 17:54:05




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 Re: Repowering a W9 in reply to Russ Schultz, 01-22-2004 16:55:54  
I recommend you leave out the tranny, Moving the radiator ahead with the cast frame will be a big problem. On most frame rail tractors they need lengthed 12 to 14in to use engine and tranny. If you want power bore out the w9 to a 338ci.



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steveormary

01-22-2004 20:40:39




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 Re: Re: Repowering a W9 in reply to r4etired, 01-22-2004 17:54:05  

Russ, now that automatic tranny in there would be an interesting concept. Are you going to govern the engine down some?

But dont some of these new tractors have what would be the Ford SOS mated to a Buick Dynaflow transmission and have it all controlled by computer.



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