AEB Throttle Body Hose Too Curvy?

[b5a4erik]

Halo,

Just working on my throttle body today (rotated it), and noticed that the throttle body hose seems to be unnecessarily curvy. It makes a fat "C" shape in between the intercoolor and the TB... I figured it could have something to do with aerodynamics, but would it make more sense to replace it with a hose that was more of a straight shot?

~ ea

[redline380]

Too curvy? Kim Kardashian is too kurvy. For me, at least. I mean, who can plop a bottle of champagne on their ass without it falling off, photoshop or not?

Man, I am on a role today.

To answer your question, I believe the hose is made that way otherwise it would kink. Imagine a piece of heater hose being bent too much. But it isn't a big deal. Does your compressor hose have a hard time letting pressure out if the hose is all coiled up? Nope.

[b5a4erik]

Apparently, only Kim "Eyein the Dashboard in my Kar" herself. I imagine she's saying that's a well designed dashboard... LOL

rofl as for the hose, ight. I saw this dude here: http://www.audizine.com/forum/showth...o-Mods-Edition made a custom hose that was less bendy, for the sake of not bumping that thread... It seems as though this one was better, for the reason it was bigger in diameter... Recommended?

[redline380]

I'm willing to bet there is no noticeable difference. I could see getting a better one, but the stock one is actually pretty well made.

[b5a4erik]

I'm willing to bet there is no noticeable difference. I could see getting a better one, but the stock one is actually pretty well made.

Word.

[A1 A2 German]

I already have the mod thread up.

Edit: Can't find the thread on my phone.

Before:



After:

[Davdraco1]

is there proof that rotating the TB actually does something? I know the theory behind it but have yet to see tangible evidence of it. And redline, you being on a role is an understatement.

[b5a4erik]

I already have the mod thread up.

Edit: Can't find the thread on my phone.

Before:



After:

Gotchu: http://www.audizine.com/forum/showth...e-Delete-34-05

is there proof that rotating the TB actually does something? I know the theory behind it but have yet to see tangible evidence of it. And redline, you being on a role is an understatement.

This guy seems to have some data: http://forums.vwvortex.com/showthread.php?4027043

As for me I saw that and wanted to try it, and looking at the intake manifold, and also the way the TB opened, it seemed to make sense and feel better when I rotated it. Schwoop %

In continuation... One guy said it made no difference on his Big Turbo setup, another guy said it did make a difference... on his stock k03.

[b5a4erik]

more teh info: http://forums.vwvortex.com/showthrea...y-throttlebody (on throttle body rotation).

I figure combing a straight TB pipe with the TB rotation is ideal.

[Davdraco1]

My thinking is if we are running off of boost and pushing air in and not sucking air in there should be the same amount of air in the IM at all times. And since all the intake valves aren't opening at the same time the pressure doesn't drop instantly and then go back up again if you can picture that. I think on an NA car this would make a different if the setup was the same and had the weird TB position.

[b5a4erik]

My thinking is if we are running off of boost and pushing air in and not sucking air in there should be the same amount of air in the IM at all times. And since all the intake valves aren't opening at the same time the pressure doesn't drop instantly and then go back up again if you can picture that. I think on an NA car this would make a different if the setup was the same and had the weird TB position.

I hear you. I don't think this whole TB rotation is going to make a crazy huge difference, just perhaps smooth things out...

Another poster made a MS paint version of how he thought it was working on a VW engine, here's my version of a theory for an AEB:

Stock TB position:

In this case, the TB flapper opens top/bottom, and I think the air is more likely to heavily flow directly to cylinder 2 & 3, while cylinder 4 gets a medium flow, and cylinder 1 gets a low flow.



Rotated 90* counter clockwise (with the computer portion on top):

In this case, the TB flapper opens left side away from the engine, right side towards it: air gets immediately directed into the direction of cylinder 4 which was lacking before, gets "bounced back" towards cylinder 1 which was also lacking, and gets sort of "equalized" for cylinder 2 & 3, instead flowing directly into them as it did before. Thus resulting in *even distribution*.

[redline380]

Audi pays engineers millions of dollars a year. Willing to bet they had it right when they designed it.

[b5a4erik]

I figure the same thing, and yet each year they engineer a new, better car.

I think that throughout the design process they might've either made sacrifices in areas, or just didn't put all the time/effort into certain areas (such as the TB flap opening direction).

As of right now, I'm no engineer, this is all just me looking and thinking, and well, also drawing. My thought process makes sense to me, and hey, car still runs Extended test drive needed...

But basically, what I've gathered through my research is that: this won't make much of a difference unless your running Water/Meth, the only real possible difference on stock is perhaps more smoothness.

More Recently Dated:

Due to my DBC (Drive-By-Cable) ness, I've put the TB back to stock rotation. The cable was chafing the way I had it, was uneasy to me plus I couldn't get the pedal to stay towards the top (too much slack in the cable) resulting in me not being able to fully open the TB... so despite my efforts, I reverted to stock orientation. If I had a facelift model, I would've kept it rotated (no cable involved there).

[redline380]

They should create a throttle plate like a camera aperture

[b5a4erik]

They should create a throttle plate like a camera aperture

Yo now THAT is a good idea. If I ever become an engineer and design a TB, I'll try to make that and give you credit.

[Avant Nate]

They should create a throttle plate like a camera aperture

That wouldn't backfire. 6+ overlapping flaps versus one circular one. I give the factory recall about 6 months.

In the original linked quote, the manifold wasn't longitudinal which has an entirely different air flow. If anything I think you would be directing air at either 1 or 4. Also original engineering dynamics go out the window when you flowing twice or more spec.

[b5a4erik]

That wouldn't backfire. 6+ overlapping flaps versus one circular one. I give the factory recall about 6 months.

In the original linked quote, the manifold wasn't longitudinal which has an entirely different air flow. If anything I think you would be directing air at either 1 or 4. Also original engineering dynamics go out the window when you flowing twice or more spec.

Haha, an interesting idea none-the-less.

Yeah, I realized it was for a different style engine, but it did encourage me to take my TB off and take a look for myself and my AEB. As for the 2x+ the power note, hm, yeah, and... awesome.