porting questions

[scarlett98]

So i have google searched this with no answers, i see that people have been porting the stock 3.7 intake manifolds as well as the boss 302 manifolds. My question has anyone done any porting to a stock 3v manifold? I have a spare laying around i could use as a test dummy. I mean even if it only nets small gains it may be worth it considering the frpp unit is 600+ and those dont really net hardly any gains either.

 

[cavero]

Ever look @ Charge motion delete plates?

 

[scarlett98]

Yes i have them

 

[Townson]

I'm pretty curious on this as well. I've ported a few sets of the old 5.0 heads, and while I realize that the 3v's are supposed to be more complex, I'd still like to learn.

 

[scarlett98]

The heads ive seen can be done obviously

 

[Department Of Boost]

Not much material in a intake to port.

 

[scarlett98]

is it to thin? how are the yote and typhoon guys doing it then?

 

[BruceH]

is it to thin? how are the yote and typhoon guys doing it then?

What do you think the gain will be? Aftermarket intakes increase airflow in different ranges with longer runners and or a larger plenum. The stock intake size isn't really holding anything back, gains in the higher rpms are gained with the aforementioned longer runners and larger plenum. The stock intake will flow more air than a 4.6 can digest. An aftermarket intake is really only needed with larger displacement. Good luck with porting the stock intake but imo Ford thought it out pretty well based on how much it flows and how well it flows.

That's my opinion anyway. It's based on my own experiences with various sizes of 4.6 3v motors and countless hours of data logging things like airflow. Your experiences may be different.

 

[cavero]

What do you think the gain will be? Aftermarket intakes increase airflow in different ranges with longer runners and or a larger plenum. The stock intake size isn't really holding anything back, gains in the higher rpms are gained with the aforementioned longer runners and larger plenum. The stock intake will flow more air than a 4.6 can digest. An aftermarket intake is really only needed with larger displacement. Good luck with porting the stock intake but imo Ford thought it out pretty well based on how much it flows and how well it flows.

That's my opinion anyway. It's based on my own experiences with various sizes of 4.6 3v motors and countless hours of data logging things like airflow. Your experiences may be different.

Definitely makes sense. I've seen in a bunch of places that the FRPP intake manifold won't net you any gains unless you already have cams, LT's, TB, high-flow heads, etc.