Andreas, Charles, what you think?Andreas Miko said:I sent a 20V head to SR20turbo freak and he was very much impressed with head.
The valve stem is 5.5mm but necks down to 4.5 mm in the port. The 20V head runs incanel valves which are super light.
From what Charles has seen he feel the 20V head is on par with flow as a K20 head.
K20 head 35mm valve with 6 mm valve stem
20V head 34.3mm valve with 5.5mm valve stem necked down to 4.5mm
This means the 20V head has the same or slightly larger flow threw the throat.
the 20V head kills the sr20ve head. in a lot of ways. Personally, a sr20ve/ N1 type head can never be like a 20v head. the 20v head ports are atleast 1/8" taller and wider, not sure how much exactly but the port also has a smoother taper. the divider wall is longer too.
i would put the stock 20v head in between a stock B18C5 ITR head and a K20a head.
Read my first post. N1 - Aggressive cams(springs and retainers to handle revs), shaved head(Higher compression), and ported from factory. The motor also revs higher which creates greater peak horsepower. The N1 can be duplicated if your where to buy a regular VE head. The 20V as already stated cannot because it is competently different.But why SR16VE N1 is a 197hp stock and the SR20VE 20V just 204hp stock???
It's 1.6 vs 2.0L, 400cm3 difference!