new australian intake manifold for the 4g63
 

http://www.are.com.au/Plennums/Mit%20side%20on%20m.jpg

more: http://www.are.com.au/Plennums/Intake%20Plennums.htm


$1298 AU = $965 American. Ouch!

Re: new australian intake manifold for the 4g63
 

its missing a plenum in the pic. LOL is that how the aussies do it. ha ah ah

Re: new australian intake manifold for the 4g63
 

actually, it's the runner. That big diamond thing is the plenum.

-A. Swift

Re: new australian intake manifold for the 4g63
 

Very nice!

Re: new australian intake manifold for the 4g63
 

I shit one of those in my toilet this morning. They are nothing.

Re: new australian intake manifold for the 4g63
 

Ya the Ausies love to run off of three cylinders. But that is shinny...

Re: new australian intake manifold for the 4g63
 

Yeah, I love shinny things in my engine compartment.

Re: new australian intake manifold for the 4g63
 

Check out the A/W IC they made for a GTO. It's sick.

Re: new australian intake manifold for the 4g63
 

Damn, owned myself. My bad. im retarded.

Re: new australian intake manifold for the 4g63
 

[QUOTE=im retarded.[/QUOTE]
ditto

Re: new australian intake manifold for the 4g63
 

Quoted for truth.

Re: new australian intake manifold for the 4g63
 

Very sweet. That company puts out some nice stuff.

Re: new australian intake manifold for the 4g63
 

That's hott. Velocity stacks in the plenum. However, I don't like how they're raised. I would imagine that it's harmful for flow (turbulance before entry). I'd hack the runners a bit and drop them down to the deck.

Re: new australian intake manifold for the 4g63
 

do you honestly know what you're talking about? have you taken a fluids class?

or are you going off of what you intuition tells you.

Re: new australian intake manifold for the 4g63
 

He did say he imagines.. I didn't see a stamped professional tag anywhere.

To me it looks like any other aftermarket intake :P

Re: new australian intake manifold for the 4g63
 

What's the point of velocity stacks if they aren't raised?

Re: new australian intake manifold for the 4g63
 

They still work if they are not raised. The difference is actually pretty minimal comparing a velocity stack to flush mounted one. I did a lot of research on the subject when designing my manifold. The biggest concern is the runner length, shape and taper.

Re: new australian intake manifold for the 4g63
 

so raising the stack inside the manifold allows a longer runner in the finite amount of space available between the head and the firewall. :)

Re: new australian intake manifold for the 4g63
 

But you don't want anything protruding into the plenum...

Re: new australian intake manifold for the 4g63
 

I guess AMS fucked up with their VSR intake manifold.

Re: new australian intake manifold for the 4g63
 

Those AMS guys are just a bunch of ignorant noobs, obviously.

Re: new australian intake manifold for the 4g63
 

My question would be: Why create turbulance before the air enters the desired tract? So why not just add a ton of raised petrutions into the plenum in addition to the raised stacks? You'd be slowing down the flow, since there is something for the incoming flow to hit. The theory behind a velocity stack is to create turbulance as it enters the runner, not before. If I am incorrect in saying this, please correct me. Examples would be excellent to highlight the information.

BTW: Thanks for stating what should have been obvious to the previous poster to your comment, Pimpin DSM. I just love how people are using their Jump to Conclusions mat in this board. Apparently a Fluid Dynamics course is required to join this board and post.

Re: new australian intake manifold for the 4g63
 

Me thinks you better do some more book learnin'!

A velocity stack is used to minimize turbulance going into the runner. Then you start getting into laminar flow (which is why they have it protrude) and all that fancy jazz.

Re: new australian intake manifold for the 4g63
 

Re: new australian intake manifold for the 4g63
 

I don't know. Things that often look like the way to do things or look better or smoother don't always end up making the most power. The same thing goes for head porting, lowering an intake port floor to do a gasket match, over porting with the bigger is better mentality, knife edging dividers, port matching the exhaust side, valve guide boss removal, etc can make a head produce less HP. I know AMS spent a long time dyno testing their intake manifold and wen't through many different versions before they settled on releasing that design.

Maybe if you think of the intake manifold plenum as a waiting area for ready to use pressurized air. A reservoir for air for the piston to suck in air when it wants it, not as something to direct the air right in from the turbo. You want the insides of the plenum to be somewhat rounded or have angled walls when needed to avoid 90 degree corners to not cause too much major disturbance when the air comes hurtling in past the throttle body to slow down and get ready to make the journey down a port with an open valve. Too big of a plenum and the turbo can't keep it full, too small and there isn't enough air ready to fill the motor at high rpms. You don't want air coming in a favoring one cylinder, maybe the raised ports cause a little turbulence to keep an air flowing along the walls from being directed right into a specific port constantly. Or it might allow the port to suck from a less turbulent area of the plenum away from the walls. Another possibility would depend on how air flows around the radiused inlet, one that sticks up into the plenum would have more of the radiused inlet which might give it more directions to be able to suck in air than just directly infront of the port.

Re: new australian intake manifold for the 4g63
 

That paints a clearer picture for me. And I understand why they would want a velocity stack, since the port can pull air from a larger area. But why create turbulance. The velocity stack "compresses (for lack of a better term)" air from a larger area while the stack pulls it in. Why "rough up" the air? Why not streamline it so that it flows better/evenly? The more air you pull in, the better. So why slow the air down in the plenum for it to just wait? I've got gas to burn, let's move it.

Re: new australian intake manifold for the 4g63
 

The intake valves aren't always open to pull in air.

Re: new australian intake manifold for the 4g63
 

if you really want to know, here is a good place to ask just about anything:

http://www.eng-tips.com/threadcategory.cfm?lev2=6