Quote:
Originally Posted by YTNUKLR
ho hum 
why did you increase the valve size, particularly the exhaust? not being critical at all , I am genuinely ignorant of why and curious to know.
cheers |
Increased flow at all RPM levels. The Carrera head has huge ports. I was trying to bring the ratio of port size to valve diameter in line with what I understand to be optimum about 80%.
I've tried reducing port size with our Venti-port system (with reasonable success) and now we're trying bigger valves.