Upper Intake Manifold Pics

[Smoke them tyres]

Guys,

Does anyone have some pics of the internals of the upper intake manifold?

Would be good to have some pics without splitting the manifold off the engine just yet.

[MaTTe]

if you don't find one by tomorro, I'll pull one apart and take photos

[needfordspeed]

Here's some from an older model (not a BA) but pretty sure the upper is the same anyway?

The first pic is of a modified one, they're not that smooth stock

I got some better pics if you want them, just need to upload them, PM me if you need.

[XF Falcon]

Whats with those butterflies and that on the lower half in the second photo, do the N/A's have that or something?

[Tocchi]

mike, its the EF/L BBM.

basically, below 3800rpm the butterflys are closed, making the air use the long runners, promoting torque

when the car hits 3800rpm the runners open and the air uses the short runners.

falcons are far more responsive with the butterflys in.

its a common mod for EA-Ds too. gives about a 10% power increase

[XF Falcon]

Ah cool stuff Matt.

Wonder why they dropped it in the BA's onwards then?

[Tocchi]

I think the NA 6s have it.

but I know the Phoon doesnt.

im pretty sure it could be an overlap factor.

the 3540 spools early, and im guessing due to that fact, they dropped the long runners on the turbos

eg: this is a dyno sheet of when the EF was N/A (and running an AFR in the 8s, but we can ignore that cos it doesnt affect rpm switching)

as you can see, there is a distinct drop of power at the point of runner switching

[XF Falcon]

cheers again

[Venom XR6]

  XF Falcon said:

Ah cool stuff Matt.

Wonder why they dropped it in the BA's onwards then?

They didn't drop it, it was only the turbos that didn't have it. The FG also has a similar system in the plastic NA manifolds.