96 mm cylinder question, Difference between 1.7- 2.0? Options

[Jgilliam914]

I was digging through a storage tote and found a set of NPR 96mm pistons and cylinders.
Is there a difference between one that fits a 1.7 vs a 2.0?

[Montreal914]

2.0 rod has a smaller crank end diameter due to 2.0 crank being a 66mm crank with reduced journal to create the extra offset (stroke). Not sure I properly explained this… (IMG:style_emoticons/default/rolleyes.gif)

Edit: said differently… the 66mm crank has 55mm journal whereas the 71mm crank (2.0) has 50mm journal. The 5mm is machined offset on the 66mm crank to create the 71mm stroke. Therefore rods are different between 66 and 71, as mentioned in previous posts.

[ClayPerrine]

2.0 rod has a smaller crank end diameter due to 2.0 crank being a 66mm crank with reduced journal to create the extra offset (stroke). Not sure I properly explained this… (IMG:style_emoticons/default/rolleyes.gif)

Edit: said differently… the 66mm crank has 55mm journal whereas the 71mm crank (2.0) has 50mm journal. The 5mm is machined offset on the 66mm crank to create the 71mm stroke. Therefore rods are different between 66 and 71, as mentioned in previous posts.

Yes, but at Top Dead Center is the distance from the crank centerline to the piston top the same on a 1.7/1/8 and a 2.0? I would suspect it is, as they didn't change the case sides to account for the longer stroke. The smaller journal on the 2.0 would account for the difference in rod length at TDC. All the additional displacement comes from the additional distance at BDC.

A 2.0 smaller offset rod journal may not necessarily have the same distance from the case side to the highest point on the rod journal. The differences in the rods would account for that.

Do I make sense??