Oliver 88 stroker

[Ironcollector]

I have been wonder for some time a detail of an Oliver 88 with a 5 inch stroke. How close is the center of the piston pin to the bottom edge of the sleeve?

 

[VicS]

I have been wonder for some time a detail of an Oliver 88 with a 5 inch stroke. How close is the center of the piston pin to the bottom edge of the sleeve?

Its better if you have as long a rod as possible. So thats not a problem. But I would start from a 310 or a 320. If you are pulling top cut with 15.5 x 38 tires 4 mph that is big enough. If faster the sky is the limit. Lol

 

[VicS]

Its better if you have as long a rod as possible. So thats not a problem. But I would start from a 310 or a 320. If you are pulling top cut with 15.5 x 38 tires 4 mph that is big enough. If faster the sky is the limit. Lol

 

[Ironcollector]

It seems even with a short compression height piston there is still an issue. I don't know that you can let the sleeves hang down in the block like the factory wet sleeves do to get a longer cylinder. Not only is the sleeve thin and unsupported with a 4.375" piston, at some point it will hit the crankshaft throw.

 

[VicS]

It seems even with a short compression height piston there is still an issue. I don't know that you can let the sleeves hang down in the block like the factory wet sleeves do to get a longer cylinder. Not only is the sleeve thin and unsupported with a 4.375" piston, at some point it will hit the crankshaft throw.

When I am deciding what stroke will work. I cut a dowel pin to my main bearing size. And long enough to span 2 main bearings. Then another shorter dowel pin the diameter of the big end of my rod. Then if I'm wanting to see if a 5" stroke will work. I cut a steel strap ( 1/8x1") with holes drilled 2 1/2 " apart. And see how it turns or not, and what needs notched or ground. You already have marked the center of your dowels turning them in a lathe. I use a 5/16" wood screw. I make a few different lengths of these straps up to 3" for a 6" stroke. I have stroked a Massey Ferguson 50 engine to 5" . The rods come thru the block. (JB weld and screen wire)
.

 

[VicS]

When I am deciding what stroke will work. I cut a dowel pin to my main bearing size. And long enough to span 2 main bearings. Then another shorter dowel pin the diameter of the big end of my rod. Then if I'm wanting to see if a 5" stroke will work. I cut a steel strap ( 1/8x1") with holes drilled 2 1/2 " apart. And see how it turns or not, and what needs notched or ground. You already have marked the center of your dowels turning them in a lathe. I use a 5/16" wood screw. I make a few different lengths of these straps up to 3" for a 6" stroke. I have stroked a Massey Ferguson 50 engine to 5" . The rods come thru the block. (JB weld and screen wire)
.

 

[Ironcollector]

I have made something similar for one cylinder except I made it all out of steel. I have also welded two rods together to represent the longer rod. At a 5" stroke a reinforcement rib inside the block needs to be notched and the cam needs to be notched. No windows are required.

 

[EFV]

4.375 X 5 is only 450 cubic inches,has to be a lot more room to grow.
Gingerich Oliver 88 engines were 540 and 580 CI 30 years ago. Using a
Perkins 354 crank has them in 600+ range now.