29-05-2012, 11:28 AM
88mm stroke 10.4;1 compression
Drop the stroke to 81.4mm - if you kept the rods the same length and the crank position the same, you'd end up with the piston sitting lower in the bore at TDC by half of the difference between the strokes - 3.3mm... It'd also sit higher in the bore at BDC, again by half of the stroke difference - 3.3mm.
Higher at the bottom by 3.3mm and lower at the top by 3.3mm = your 6.6mm difference in stroke.
Now, whether peugeot decided to extend the conrods or slap feckloads on the piston crowns in the 1.8 application - I don't know...
Drop the stroke to 81.4mm - if you kept the rods the same length and the crank position the same, you'd end up with the piston sitting lower in the bore at TDC by half of the difference between the strokes - 3.3mm... It'd also sit higher in the bore at BDC, again by half of the stroke difference - 3.3mm.
Higher at the bottom by 3.3mm and lower at the top by 3.3mm = your 6.6mm difference in stroke.
Now, whether peugeot decided to extend the conrods or slap feckloads on the piston crowns in the 1.8 application - I don't know...
