Originally Posted by
fuelie327
^^ that pretty much answers it . Thanx Hurst. That lil tit area is exactly what I was talking about . Seems like it just cloggs the port.My first 306 was pretty stout, I think I might expeirement with this 4.6 I just pulled out. For being such a small displacement , it sure is a big ass motor.
The whole reason for the tit area (the NPI tear drop shape as well) was designed that way due to how the injectors spray into the ports. You see those same 'tits' on the DOHC heads for the same reason.
Hurst