just figured i'd throw it up for discussion....think it would work? its in an Audi TT never seen one like this before..... im skeptical

 

That does look like it would work. It flows really evenly from the side over the top. Maybe that car has ITB's. Ive seen alot of oddly designed Audi manifolds, but the seem to work really well.

 

The design of it looks like it may work well, nice curve and bend..

 

looks very simple to make... and i think it would mostly be space constraints.

 

24v Vr6 tt Nice

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pit Guy &raquo;</TD></TR><TR><TD CLASS="quote">24v Vr6 tt Nice </TD></TR></TABLE>

Um that looks like a 20V 1.8T to me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by daveG &raquo;</TD></TR><TR><TD CLASS="quote">

Um that looks like a 20V 1.8T to me. </TD></TR></TABLE>

Yeah, but its not....its a 24V VR. 1.8T got the oil cap on the other side.

 

alot of vw people are making manifolds like that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LBHgti &raquo;</TD></TR><TR><TD CLASS="quote">Yeah, but its not....its a 24V VR. 1.8T got the oil cap on the other side. </TD></TR></TABLE>



Good call. I don't know jack about VWs.

 

That intake would be even better if it allowed for the different runner distances inside the head. There's about 3.5" difference between front and rear cylinders.

thats also a 3.2 and not a 2.8

 

I don't know how well it will work, but I have incoperated a similar idea into a manifold I am building. It uses a cone though that feeds thru a certain area. My reason behind this is to make the velocity of the air in the cone relatively constant. To do this, you have to decrease the area of the tube as it passes area that air can flow out of.

The idea behind all of this is to equalize airflow between all the cylinders. Instead of blowing directly across the top of one runner, you blow air at all the runners at an equal amount. If that makes any sense.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99_GS-T &raquo;</TD></TR><TR><TD CLASS="quote">I don't know how well it will work, but I have incoperated a similar idea into a manifold I am building. It uses a cone though that feeds thru a certain area. My reason behind this is to make the velocity of the air in the cone relatively constant. To do this, you have to decrease the area of the tube as it passes area that air can flow out of.

The idea behind all of this is to equalize airflow between all the cylinders. Instead of blowing directly across the top of one runner, you blow air at all the runners at an equal amount. If that makes any sense.</TD></TR></TABLE>

Like a taper towards the cylinders furthest from the throttle body?

 

Here are some pics of wierd audi 5 cylinder intake manifolds:

 

Who is making those? That is VERY similiar to the design I am planning on using. Actually, almost identical on the design layout. I wnet about it in a slightly different manner, but it will most likely act the same way.

Anybody have some testing results from similar manifolds showing if it works or not?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LBHgti &raquo;</TD></TR><TR><TD CLASS="quote">

Yeah, but its not....its a 24V VR. 1.8T got the oil cap on the other side. </TD></TR></TABLE>

its a vr6....

 

Some examples of this style manifold:

1986 Ferrari F1 engine




More recently an ALMS Champion Audi R8

 

WHoa, Sick

 

does anyone else see those pointy things on the turbo outlets... it looks like something off the back of a jet engine.

what is it? does it reduce turbulence when exhaust comes outta the turbine?

 

reminds me of the one for laskey's new car

https://honda-tech.com/zerothread?id=1062168

 

some kid thats into vw near me makes them that way. The cone design has a small channel designed to distribute equal amounts of air into the manifold at wot

 

From what I can tell there would be more pumping losses from this style intake manifold. It physically distributes the air evenly, where as a properly shapped plenum realize on pressure gradients to give even flow.

Justin

 

For those that have designed intake plenums, is there a problem with presenting the air parallel to the velocity stacks. Seems to me that the majority of intake plenums present airflow perpendicular to the velocity stacks that they are feeding air to. For my application, I have the room to do a symetrical plenum design, and am wondering what are the problems associated with them? I want to build my intake plenum liek tony1 did his endtanks on this intercooler:



Here is the plenum that I would like to do for my intake manifold. What I'm curious about is if you can have to great of volume away from the runners? Would I be better off shaping the plenum with a rounder plenum and a transition like this:

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shortyz21 &raquo;</TD></TR><TR><TD CLASS="quote">does anyone else see those pointy things on the turbo outlets... it looks like something off the back of a jet engine.

what is it? does it reduce turbulence when exhaust comes outta the turbine?</TD></TR></TABLE>

air restrictors

not sure what size they are, but they are usually like 30mm or something on each side.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Justin Olson &raquo;</TD></TR><TR><TD CLASS="quote">From what I can tell there would be more pumping losses from this style intake manifold. It physically distributes the air evenly, where as a properly shapped plenum realize on pressure gradients to give even flow.

Justin</TD></TR></TABLE>
I've been wondering the same thing with my own design. I've seen a few race teams saying that being able to run every cylinder the same and each cylinder seeing the same power can make a huge overall difference in actual power production. But is it enough to offset the difference that the pressure drop losses may create?

Is it really possible to get a very even airflow distribution under various dynamic conditions without doing some form of air distribution system like the controlled area change and inlet entry setup of the cone-channel setup though? I mean, a plenum design that sets up even pressure gradients under steady state flow could be completely wrong under transient conditions.

The cone-channel inlet seems like it would force the runner to draw air directly from the plenum and every runner would be very similar if the plenum was symmetric. Then the plenum would be forced to fill at the rate the channel would allow it.

Of course, then you have the air disturbances caused from the other cylinders ingesting air...

I need to learn CFD so I can answer these questions on my own. That Audi manifold and the HKS 4G63 manifold are the two manifolds I used for my design inspiration.

 

Does anyone make any intake manifolds for an R32 motor?