30-12-2020, 12:16 PM
Hi I have tried a 9E head and the Ricardo head on the same engine.
I found the Ricardo head made the engine much smoother.
I think the smoothness is down to combustion chamber position the 9E fires over the valves and gas expansion pushes more onto one side of the crown causing the piston to tip and wobble.
The Ricardo combustion is more biased over the piston crown.
My engine attains higher revs with the Ricardo Head too.
The car has never been on a dyno so I can not quote relative power figures ( I do have an 8000 rpm electric Tacho instead of a fuel gauge )
I found the Ricardo head made the engine much smoother.
I think the smoothness is down to combustion chamber position the 9E fires over the valves and gas expansion pushes more onto one side of the crown causing the piston to tip and wobble.
The Ricardo combustion is more biased over the piston crown.
My engine attains higher revs with the Ricardo Head too.
The car has never been on a dyno so I can not quote relative power figures ( I do have an 8000 rpm electric Tacho instead of a fuel gauge )