quote:Originally posted by No Quarter:
I can't imagine having a 4V size intake into a plugged-to-2V head will improve flow.
And I also remember having read here that 4V produce more HP than 2V, at the cost of throttle resp and low end torque.
George? Anybody?
The port is closed to approximately the size of the A3 heads.
In the case of the port stuffers, the bottom of the port is raised about 5/8". Line of sight to the valve remains unchanged.
It has been debatable all of these years whether the bottom of the port in a 4v head had much value anyway.
The angle to the valve is better in the 4v head vs. the 2v head. The 2v head is reduced but is moved the wrong way, down.
I know Dan Jones was talking about dynoing the 4v heads with the suffers but I don't know if he actually got around to it yet?
I don't think that the bottom of the 4v intake becoming a mismatch is a significant issue with the modification.
I'd be more concerned about the stuffers coming loose. They are supposed to be bolted through the bottom but that presumes that the castings are not going to split through the bolt hole and become UFO's in the port?
I'd ask Dan.
Having had the A341 "torker" intake, the bottom of the runner on that intake is filled and I think will line up approximately with the stuffer heights.
That would be the manifold to try but they have become very pricey, $800-ish IF you can find one for sale at all.