11-09-2013, 08:30 PM
16v head has the advantage of injectors without stupid plane angles.
Gotta say I don't think the 16v head is as bad as you and Ruan think, need to do some reading and measuring when mine comes apart and work out the c/s area of the inlet tract and the back of the valves. I gotta be honest I think, like the GTi6 manifold, that the entry to the manifold is going to have a smaller c/s than the combined 4 or 8 ports but we'll see.
Also you know the reasons I'm going 2.2, partly to be different, partly for the status of having a 2.2 rather than just another 2.0 and a million other little reasons but mainly because I love the low down grunt of the bigger displacement.
On the intake flow subject Im pretty sure that the 2.2 is a pair of 30mm valves and the 8v is a 36mm both with 6mm stems so the 2.2 16v will flow more at the valves (if a very quick mental estimate is right)
Gotta say I don't think the 16v head is as bad as you and Ruan think, need to do some reading and measuring when mine comes apart and work out the c/s area of the inlet tract and the back of the valves. I gotta be honest I think, like the GTi6 manifold, that the entry to the manifold is going to have a smaller c/s than the combined 4 or 8 ports but we'll see.
Also you know the reasons I'm going 2.2, partly to be different, partly for the status of having a 2.2 rather than just another 2.0 and a million other little reasons but mainly because I love the low down grunt of the bigger displacement.
On the intake flow subject Im pretty sure that the 2.2 is a pair of 30mm valves and the 8v is a 36mm both with 6mm stems so the 2.2 16v will flow more at the valves (if a very quick mental estimate is right)