Quote:
Originally Posted by '___'
Looks interesting, but I'm not a fan of how quickly the runners transition from round to oval...that will likely create some turbulence and slow down the charge air. Also not a fan of the bellmouths not having any undercut in the plenum. Bellmouths with an undercut are proven to flow better and provide better discharge coefficients which create more laminar airflow.
|
Quote:
Originally Posted by '___'
The OEM manifold has a few things going for it and a few going against it. The biggest of the two are:
Bad...less than optimal equalization of flow between all cylinders and a gnarly hump in the cylinder 1 runner.
Good...the plenum has a good amount of volume and an extra "pocket" of space just after the throttle body that is there to increase volume and slow down the incoming air so it can more easily make the turns necessary to get to the cylinder in need. This is also added by the 90* bend in the charge pipe just before the TB, which also helps to slow down the incoming charge air. This tactic has been used by a bunch of aftermarket manis by way of throttle body angle to runner placement. Examples of such are the 2JZ and RB motors.
|
+1
I'm going to try and stay oval on mine whenever I have a spacer/flange to work with. Motiv is making august drag out so long lol.
http://www.rossmachineracing.com/ovaltube.html
Haven't played with the throttle actuator yet but I'd like to run one of these with it.
http://www.rossmachineracing.com/throttlebody90mm.html
EDIT: Also not a fan of this manifolds runner design. But OFH gets in the way that is why I'm going to delete it.