i was reading in the Toyota bible, that the 22r/re were over square, meaning the bore was larger than the stroke, witch typically increases mid and high speed performance while sacrificing low end torque, in the book it says the effect on the low end torque was negligible.
so my question is if you bore it any more during a rebuild, will it sacrifice low end torque?
Boring it won't really negatively affect torque. The stroke is what affects the torque more than anything. A long stroke means the piston travels farther during it's cycle and the subsequant power stroke after the fuel is ignited and creates creates torque. Longer strokes usually sacrifices high rpm capabilities due to the design of an internal combustion engine.
A short stroke means the piston travels less distance in the cylinder and because of this can usually operate at a higher rpm.
If you look at most of your indy or formula 1 racing engines the bore and stroke are usually very close to the same.
The weight of the moving parts tends to affect torque as well. The is why most of your high torque diesel engines weigh so much. Heavy pistons, rods, flywheel, etc. It uses the inertia created by the heavy moving parts to ad torque.
