Reply to thread

Message: [QUOTE="Rich Rohrich, post: 144002, member: 16241"] By increasing the bore dimension without any other flow path changes you increase the port velocity (intake and exhaust) for a given rpm this causes the torque peak to occur at a lower rpm. Low rpm combustion is improved due in part to greater charge turbulence from the increased velocity. In many cases the overrev (power past the torque peak) is improved because the higher port velocity makes it more difficult for intake flow reversals to occur once the piston passes BDC and bergins to rise while the intake valve is still open. [/QUOTE]