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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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3-7/8 bore for 880 diesel

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Yamadog

08-22-2006 20:18:05




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I have an 880 diesel that needs rebuilding and was wondering if the stock bore can be increased to 3-7/8" without boring the block for bigger sleeves. I've seen 3-7/8" bore kits available for gas engines but not for the diesel. Thanks in advance for any info.




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Weldin Man

08-25-2006 04:37:44




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog, 08-22-2006 20:18:05  
Do you do anything to the injectors when changing to the Roosa-master pump?



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D-Day

08-26-2006 15:11:00




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 Re: 3-7/8 bore for 880 diesel in reply to Weldin Man, 08-25-2006 04:37:44  
No. The 1600 injectors are the same as a the 88/880. The only thing you need besides the other stuff I mentioned are the injector lines from a 1600.



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Yamadog1

08-23-2006 20:16:31




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog, 08-22-2006 20:18:05  
Thanks for the replies. D-day - Now you got me thinking about injector pumps. Did all the 1600s have the roosa master? Is the roosa master a better pump than the American Bosch? If so why? Sorry for so many questions. I'm just starting to get into the performance aspect of tractors.



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D-Day

08-24-2006 20:38:02




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog1, 08-23-2006 20:16:31  
I'm sure there are several reasons, but two of them are pretty obvious in my opinion. First, they will let the engine turn 2500 RPM instead of the 1600/1750 that the American Bosch pump turned. Second, you can still get parts or buy a brand new pump in a Roosa Master. The RM pump is now under the name of Stanadyne. All of the 1600s, to the best of my knowledge, had the Roosa Master pump. As far as the adjustment (smoke) screw, it's a little tricky. If you're interested in that, I'll save that for another post. One more thing: the Roosa Master pump set up would allow you to, if you wanted to, you could get a bigger fuel pump. That's if you wanted to make a full-time pulling tractor. Hope this helps.

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J Schwiebert

08-24-2006 03:50:55




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog1, 08-23-2006 20:16:31  
Very late 880 tractors also have a Roosa Master injection pump. Yes all 1600 tractors have a Roosa Master Pump.



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ejr-IA.

08-23-2006 11:00:04




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog, 08-22-2006 20:18:05  
I had the 880 sleeve bored to 37/8 and used 1800c diesel flat tops cut down to specs.



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dboll

08-23-2006 07:06:28




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog, 08-22-2006 20:18:05  
I have 4 used M&W 3 7/8 flattops for a dsl.



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D-Day

08-22-2006 21:14:06




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 Re: 3-7/8 bore for 880 diesel in reply to Yamadog, 08-22-2006 20:18:05  
Yes, a 3-7/8 sleeve kit will fit in the diesel. I have '52 88 diesel with them in it, so it's a 283. All you have to do is machine the top of the piston off until it is flat; they are originally domed pistons. Maibach's did mine, they machined them down and shipped them to me. Another thing, if you are looking for some extra power, and you didn't already know, a 1600 fuel pump and injector lines will work on an 88/880. All you need is the timing cover and backing plate; the rest is a bolt-on installment. But on ours, the threaded hole on the left side of the block needed some grinding so the Roosa Master pump will clear. It sounds good and loud, especially at 2500 RPMs. That big pump can really make it smoke. Hope this helps and good luck on that engine build.

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newter haven

08-24-2006 19:52:22




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 Re: 3-7/8 bore for 880 diesel in reply to D-Day, 08-22-2006 21:14:06  
so if that big pump can make smoke, what did the sleeve kit do for it? have one, yes the pump makes lots of smoke, didn,t know about the sleeve kit when rebuilding or machining pistons. maybe I should change my name to in the dark.



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