I was wondering how closely matched the volume inside the cylinder head for each cylinder has to be after a porting and grinding operation.
The swept volume per cylinder of a 3.2L NSX V6 engine is 3.2L / 6. At TDC, that volume decreases by a factor of 10.5. But is there a residual volume not accounted for?
If not, and I think that'll be wrong, the volume inside each "dome" of the cylnider head is 3.2L / 6 / 10.5. We then use that to calculate how a slight volume change, either by decking the head or by seating the valves too far in, will affect compression, and thereby lead to an unbalanced engine.
To me, balance is very important: crank shaft, piston + rod weight, compression. All of them should be as balanced as possible. Is that why the NSX-R hand-built engine can both spin faster and have more torque throughout the power band?
The swept volume per cylinder of a 3.2L NSX V6 engine is 3.2L / 6. At TDC, that volume decreases by a factor of 10.5. But is there a residual volume not accounted for?
If not, and I think that'll be wrong, the volume inside each "dome" of the cylnider head is 3.2L / 6 / 10.5. We then use that to calculate how a slight volume change, either by decking the head or by seating the valves too far in, will affect compression, and thereby lead to an unbalanced engine.
To me, balance is very important: crank shaft, piston + rod weight, compression. All of them should be as balanced as possible. Is that why the NSX-R hand-built engine can both spin faster and have more torque throughout the power band?
