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Oliver 88 vs. Super 88

O

OliverMW

New User
I noticed in the Oliver service manual that an Oliver Super 88 has an 1/8" offset in the connecting rods. Does anyone know why there is an offset? Is the bore spacing different or the crank journal spacing different?
 
I got a set of cylinder kits for a Coop E4 and the pins are offset 3/32. It affects the thrust on the power stroke and changes the top-of-stroke dwell but I don't understand the theory behind it. I looked on some racing forums and there is a lot of debate on the benefits.
 
The cubic inch displacement is bigger from an 88 to a super 88 and the offset is to get the connecting rod as close to the center of the piston as possible and to save money on bearings used from previous engines.
 
Does that mean the rod journal spacing is different from a Super 88 crankshaft to an 88 crankshaft? I'm not positive I understand what the term offset means. I think offset indicates that the center of the rod bearing width is offset from the center of the wrist pin bushing width. Can anyone confirm this?
 
I haven't had an 88 apart for a while and didn't pay attention to see if the crank is the same as a super 88 but the rods on a super 88 or 880 are off set on the crank end and can only fit one way. I'm sure some of the other Oliver guru's can give you more info on the 88 vs. Super 88.
 
All super and 3 digit Oliver engines have offset rods. The supers have larger crankpins as well. The width of the rod bearings is also wider. The holes in the block to install the sleeve are the same distance on each block.
 
The rods will only hook onto the crank 1 way, or they will lock the motor, we usually marked the rods on the camshaft side so we would install them back in the correct way, clear as mud I hope. I hope this helps you if I understand your question correctly.
 
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