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Farmall & IHC Tractors Discussion Forum
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Farmall 504 D-188 engine Question

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Charles Todd

02-22-2008 11:20:15




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From my research, the D-188 was not used on very many pieces of equipment other than the 504 and 2504. I do not know the exact figures, but the compression ratio of about 16.5 seems right. If I rebuild the engine (sleeves, pistons, head job, bearings, ect) and have a fresh build, could I shave the head. If I bumped the CR up to lets say, 17.1 - 18.1, would it give much more power? Would it run? Would it fly apart? I read a post a few days back about naturaly aspirated diesel engines having a low EGT, so I take this as there is room for improvement of what I currently have.

I am not interested in professional tractor pulling, but I would not mind trying it out this fall at the Louisiana State Fair :) Whatcha think?

I know, I am asking to blow the engine up... Could I retro-fit on a turbo? M&W did not make one for the 4 cyls but I know they have them for the 6's. Could I use my skills to graft one onto the manifolds with a light boost, turn up the fuel a little and shave the head without catastrophic failures or explosion?

Thanks again, it has been raining like crazy here and I am couped up inside with my mind racing.

Charles

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Ted in NE

02-23-2008 06:32:17




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 Re: Farmall 504 D-188 engine Question in reply to Charles Todd, 02-22-2008 11:20:15  
Can't remember how much the block was surfaced Charles. The engines are prone to erosion around the water ports over time can get pretty deep. This was the reason for surfaceing the block. Never thought about takeing the top down on the sleeve might work. Don't think you will keep the sleeves in with out a press fit like the later engines. It started great was not a farm tractor, just used for feeding. Under full load will be very short lived. Hope you have better luck than I did.
Ted

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Ted in NE

02-22-2008 12:18:58




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 Re: Farmall 504 D-188 engine Question in reply to Charles Todd, 02-22-2008 11:20:15  
Other than valve recession the head is flat. I did have the block surfaced and counter bore for sleeves cut back down on a D282,same engine just 2 more cyls. Made a great difference in starting & some on power. Did not set up the fuel. Could not hold the sleeves when you worked it. They would break off at the top & end up in the pan. Might have some press fit ones made, did not persue it after it ate the 3rd sleeve. Just my experience.

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Charles Todd

02-22-2008 16:45:08




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 Re: Farmall 504 D-188 engine Question in reply to Ted in NE, 02-22-2008 12:18:58  
Thank you Ted. I did not know that it was "flat head" design. How much did you surface the block? When you had the counter bore cut down, are you saying you cut into the block or cut off of the sleeve? I think I may reserch this further.

Thanks again,
Charles



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dej(jed)

02-22-2008 11:49:02




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 Re: Farmall 504 D-188 engine Question in reply to Charles Todd, 02-22-2008 11:20:15  
I don't see why you couldn't do it. Also they used that engine in the 340's also. As with any higher compression ratio engines, the life will be shorter from higher temperatures and thiner metal surfaces. You might want to add a supplemental cooling fan. Good luck. It sounds like a plan to me.



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Randy in NE

02-22-2008 11:35:22




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 Re: Farmall 504 D-188 engine Question in reply to Charles Todd, 02-22-2008 11:20:15  
You might pose these questions over on the pulling board.



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