Quote:
1200GXman wrote:
Forgot to mention.
BMW intake valves = 40mm
BMW exhaust valves = 37mm
I think this might be a little big for a A12 engine.
Thanks for the suggestion kulula.
I am still thinking what to do.
What bore size are you running.
My maths says on a 78mm bore you want:
intake valves = 40.5mm
exhaust valves = 30.5mm
I know 30.5 sounds small but thats what you want most people oversize there exhaust valves thus slowing down the air speed in the port and killing the engine.