intake manifold modification

[nissannewby]

Pete.

what gains have you actually made with this current manifold design as opposed to the basic lid lift like my ARE one.
is it more to do with velocity and responce than power?
cheers
Benny

Air speeds are lower at the valve, so better cylinder filling is achieved, which the equates to a faster torque rise. I believe the curved design also helps with reducing turbulence.