Quote:
Originally Posted by C. Ludwig
More duration without overlap.
|
As stated its mostly done to allow the correct engine compression ratio #1
On the overlap aspect:
My engines actually have quite allot,
not as much as a bridge or semi pp, but enough (maximum possible on a street port) to allow high Ve at high rpm thereby improving power output and rev range. Its the best balance for an engine running on the street yields highest average power curve when matched correctly in other areas.
You can tell this when you look at equalized engines such as in my power at 1 bar NA thread. I have a very extensive list on this (far bigger than what I put in that thread),
This combo pictured with an EFR9180H and Cosmo inlet manifold on RICE RACING street port is well over 260bhp @ 1 bar (N/A) and it works to 4 bar reliably.... which is
a little bit of power 