F22A6 Extrude Honed Intake manifold, leave it as is or add H23 upper plenum?

[aleks77]

Hey guys i bought an Extrude Honed (if you dont know what it is read the quote below) f22a6 manifold with f22a6 TB bored out to the max. I know that H23 TB + H23 Upper plenum + F22A6 Lower plenum is the best setup. I Have the following parts;

- f22a6 extrude honed intake manifold
- f22a6 bored out to the max TB (64mm)
- h23 maxbored TB (66mm)

my question is, which setup should i go with;

1) f22a6 extrude honed IM + f22a6 bored TB (64mm)
2) f22a6 extrude honed lower plenum + regular H23 upper + H23 maxbore TB (66mm)

My concern is if i get the H23 upper plenum, it might mess up the airflow since the f22a6 lower is extrude honed, and the h23 upper wont be. My other question is i belive that the f22a6 upper plenum extrude honed, flows better than a regular h23 upper. And there is no way for me to run the H23 TB with F22 upper plenum correct? the bolt pattern is different?

Any help is appreciated, thanks a lot!

What is extrude honing;

So what is the process? It begins when a part or parts arrive at the Extrude Hone facility. First, the part is thoroughly cleaned in a solvent bath and prepped for media flow.

The media is a combination of semi-solid rubber and silicon carbide abrasive (it looks and feels like a gritty form of gray Play-Doh). A "fixture" is bolted to the part, which will direct the media flow into a specific passage or passages. Once the appropriate fixture is attached, the entire setup is placed into an Extrude Hone machine for processing. The machine basically consists of two vertically opposed cylinders that will extrude the media through the fixture and the engine component's various air passages. As the abrasive material slides through the passage, it removes small imperfections in the metal to create a smoother finish. Through a combination of opening, polishing, and balancing the ports/runners within the engine component, airflow capacity and flow velocity are increased.

[Granite CB7]

I know that a6 plenum would flow really well, but you can't beat the volume that the H23 plenum offers. I'd use the H23 plenum and at least portmatch it to the a6 runners, or find a good local shop to P&P it.

That's a nice setup, but I think the H23 plenum + t/b you have would further help your setup.

[owequitit]

It is probably impossible to say without having a dyno handy.

Your TB is bigger, so your extrude honed A6 may have the advantage.

Throw it on a dyno and try it out.

[aleks77]

I wish i had the upper plenum to swap them out and try the different options, there is no way to fit the h23 TB onto an f22a6 upper?

[kmart64]

I wish i had the upper plenum to swap them out and try the different options, there is no way to fit the h23 TB onto an f22a6 upper?

nope