B6 Intake manifold solutions

[20vturbo]

I think it's time we have a thread dedicated just for that as it is the only thing that hasn't got much attention on our cars
My intention is to use either apr or the the new sem intake in transverse form and adapt it to my car
my reasons...a lot of R&d has been put in transverse manifolds in the vw scene, why not use that???
second I think it's the bst design when compared to the b6 intake where the Tb blows right into the runners

my ideea is use the sem transverse intake, designe an adapter to turn the tb 90 or 180 deg down, redo my piping...Most probably the prestone tank will have to be relocated but I feel it's possible to pull it

[F16HTON]

Well, you would be best off running the charge pipe from the turbo along the firewall then and making the intercooler a top/bottom feed with the inlet and outlet on the passenger side of the car.

[20vturbo]

the prob is not enough clearence between the intake and the firewall...I could gain a 1/2 inch by machining the tb flange but I'll have to make some adapter to swing the tb down...I might get away with leaving the tank in place..of course all those hoses will have to go but I can live with that
What do you think about the manifold design???
Another question is if by having a tight bend there is gona change the flow characteristics of the mani

[dirtybrd]

I think it'd be more cost effective to just have one built, maybe with a center, bottom mounted TB. Stock AEB runners with a 5-6" pipe capped off and welded to the runners with a TB mounted under neither and centered on the pipe.

[20vturbo]

Well, you would be best off running the charge pipe from the turbo along the firewall then and making the intercooler a top/bottom feed with the inlet and outlet on the passenger side of the car.

best would be water cooler but I won't mess with that

[20vturbo]

I think it'd be more cost effective to just have one built, maybe with a center, bottom mounted TB.

not really The person who built that sem intake has put a lot of research in it...How am i gonna do that fast and cost effective...We have to use what we have no?

[dirtybrd]

I'm not sure. With the intake being under pressure, the air makes it's way to where it needs to go. Look at Honda intake manifolds, they don't look as if they have had alot of R&D.

[F16HTON]

best would be water cooler but I won't mess with that

I have what you need for a A/W setup OEM Audi S4 supplemental water radiators (new) left and right side plus the OEM brackets to bolt them in.

[mike-2ptzero]

Why not just buy one that is already designed for our 1.8t? It isn't like it hasn't been done already.

[B6Lovin]

there's a couple in the works, i saw one today that's for the transverse 1.8t - but you can switch the side that the throttle body bolts to. then it's just a simple re-work of the piping. also there's supposed to be an IM coming out for our cars towards the end of this year from a certain company that we all know and love

[mike-2ptzero]

I have had this one for just over a year now.

[20vturbo]

there's a couple in the works, i saw one today that's for the transverse 1.8t - but you can switch the side that the throttle body bolts to. then it's just a simple re-work of the piping. also there's supposed to be an IM coming out for our cars towards the end of this year from a certain company that we all know and love

wich company is that?

[20vturbo]

Why not just buy one that is already designed for our 1.8t? It isn't like it hasn't been done already.

That's the only one made and it uses oem runners

[20vturbo]

I'm not sure. With the intake being under pressure, the air makes it's way to where it needs to go. Look at Honda intake manifolds, they don't look as if they have had alot of R&D.

So based on this we might as well leave the stock one there....hmmm

[20vturbo]

Why not just buy one that is already designed for our 1.8t? It isn't like it hasn't been done already.

Also this design is based on fitting the manifold under the A4 hood...What i am talking about is a design where the main criteria of it is performance

[Wizard-of-OD]

Sit tight....WF08 will have something for you guys in CAST.

BTW what you are planning to do was done with Sportec B6 Wagon:


If you have your heart set on doing the SEM manifold idea I can help you out.Just give me a call and I will meet you in mtl...and as for the coolant bottle:

[20vturbo]

Sounds good send me your Phone #

[20vturbo]

So is that a dahlback manifold that was cut and rotated??It's an interesting set up Do you have more pictures of that??

[mike-2ptzero]

Also this design is based on fitting the manifold under the A4 hood...What i am talking about is a design where the main criteria of it is performance

LOL, yeah thats why I went from 488whp with the stock AEB manifold to 556whp with this manifold. It was designed for more flow which is what it does.

What is wrong with using the OEM runners? It isn't like there is design flaw with them so changing them isn't really going to make a difference. I got the manifold I have from Issam so it was designed for performance not looks.

I would never install a manifold that has a inlet that forces the air to change direction 180 degs which is how it looks to be designed on that B6 pictured above.

[20vturbo]

LOL, yeah thats why I went from 488whp with the stock AEB manifold to 556whp with this manifold. It was designed for more flow which is what it does.

What is wrong with using the OEM runners? It isn't like there is design flaw with them so changing them isn't really going to make a difference. I got the manifold I have from Issam so it was designed for performance not looks.

I would never install a manifold that has a inlet that forces the air to change direction 180 degs which is how it looks to be designed on that B6 pictured above.

The injector seats protrude into the flow in the oem runners.With that style I am worried on Tb postion, mainly because it blows air into some of the runners causing some uneven flow to the cylinders
What's wrong with an 180deg turn???I have a picture of an early sports quattro using a lehmann type manifold doing the same thing..we have several turns from the turbo all the way to the tb..Vw's use even longer and twistier paths and yet are somewhat more succesful at making power than 1.8 audis

almost all racing vag turbo engines I've seen so far use a double plenum manifold so that should tell us something..i am very worried about uneven flow and it seems that audi engineers were also...

[Jet Jockey]

"LOL, yeah thats why I went from 488whp with the stock AEB manifold to 556whp with this manifold."

You gained 68 WHP just from an intake manifold?

What else was modified at the same time? Bigger turbo? New programming? Surely that manifold did not get you an extra 68 WHP on its own.

In any case if it got you this result on its own, how would this manifold impact a regular or one modified with a little K04? Would new programming be required to take advantage of it or would someone see a lot of gains with it just by simply bolting it on?

[20vturbo]

You gained 68 WHP just from an intake manifold?

What else was modified at the same time? Bigger turbo? New programming? Surely that manifold did not get you an extra 68 WHP on its own.

In any case if it got you this result on its own, how would this manifold impact a regular or one modified with a little K04? Would new programming be required to take advantage of it or would someone see a lot of gains with it just by simply bolting it on?

i actually didn't say anything about that because it's very obvious...
I also don't want this thread to turn into an argument, i want to come up with the best intake solution for our cars

[Jet Jockey]

i actually didn't say anything about that because it's very obvious...
I also don't want this thread to turn into an argument, i want to come up with the best intake solution for our cars

Well I know Mike and I'm not trying to start an argument here just want to know because if I can get a big increase in WHP on my car by just bolting it on (no re-programming) then I'm interested in it.

I went through the whole Dahlback thing and it sucked big time and I don't want to go through the same shit again.

[20vturbo]

Why not just buy one that is already designed for our 1.8t? It isn't like it hasn't been done already.

this Im is forcing air into 2 and 3 and 1 and 4 are outh of the path...the ideea is good but i am saying it can be improved..
First the oem runners are the same size at the head as at the plenum...I would have them larger at the plenum so that more air is forced in and compressed as it goes into the head, remove injector seat out of the path
Second I would center the tb and blend in all the way to both extremities of the plenum
Third I would tilt the tb to face down like that the air coming in hits the plenum wall and I would use fins on that area to separate and direct air towards each runner, kinda like what apr did with the intercooler tanks

So to do this a new casting is needed
and to mention last is material, we can use plastic for better no heat soak

and now lets discuss it

[20vturbo]

So you had the dahlback intake???tell me your experience
how much power you have now???it will prob make a difference but I am sure not 60hp

[Jet Jockey]

this Im is forcing air into 2 and 3 and 1 and 4 are outh of the path...the ideea is good but i am saying it can be improved..
First the oem runners are the same size at the head as at the plenum...I would have them larger at the plenum so that more air is forced in and compressed as it goes into the head, remove injector seat out of the path
Second I would center the tb and blend in all the way to both extremities of the plenum
Third I would tilt the tb to face down like that the air coming in hits the plenum wall and I would use fins on that area to separate and direct air towards each runner, kinda like what apr did with the intercooler tanks

So to do this a new casting is needed
and to mention last is material, we can use plastic for better no heat soak

and now lets discuss it

You are assuming that the internals to that plenum let the air flow like you say but maybe the internals were modified properly to let the air flow to the proper runners with the right or same amount of air and while distributing them correctly.

[Jet Jockey]

So you had the dahlback intake???tell me your experience
how much power you have now???it will prob make a difference but I am sure not 60hp

It's a POS!

You have something I may want and you’re in Montreal. I'd like to call you (phone). Send me an e mail at [email protected] with a contact number and I'll call you. I'd like to do this now because I'll be busy for the rest of the weekend.

I'll tell you about the Dahlback POS manifold. LOL.

[20vturbo]

pm sent

[MikTip]

Funny, how all these aftermarket manifolds use the OEM runners....

[20vturbo]

Funny, how all these aftermarket manifolds use the OEM runners....

because it's hard and expensive to make new ones

[20vturbo]

You are assuming that the internals to that plenum let the air flow like you say but maybe the internals were modified properly to let the air flow to the proper runners with the right or same amount of air and while distributing them correctly.

well Issam made it He should know

[mike-2ptzero]

You gained 68 WHP just from an intake manifold?

What else was modified at the same time? Bigger turbo? New programming? Surely that manifold did not get you an extra 68 WHP on its own.

In any case if it got you this result on its own, how would this manifold impact a regular or one modified with a little K04? Would new programming be required to take advantage of it or would someone see a lot of gains with it just by simply bolting it on?

CR went from 8.0:1 to 8.5:1 with new pistons, VR6 TB, new tune for 100CC and because the new manifold allowed for way more air flow. Have to remember that I am running stand alone so the retune was needed seeing that my tune is based on boost pressure not air flow like a MAF setup would use. If it wasn't retuned the car would have been running very lean.

Have to remember that I was at a power level that was most likely maxing out the stock manifold, so a car that isn't maxing out the stock manifold might only see a fraction of the gain.

Pretty sure the manifold I had does direct air to all 4 runners more evenly then the stock one, IIRC 034 had it tested on a flow bence along with the AEB/ATW manifolds I had. This manifold also uses velocity stacks.

[mike-2ptzero]

Funny, how all these aftermarket manifolds use the OEM runners....

Just cheaper and it is already a good design.


BTW not all 1.8t manifolds use the stock runners. Here is a picture of the intake manifold that Full-race sells, it is for a transverse and retails for $1310 on their site.

[20vturbo]

Just cheaper and it is already a good design.


BTW not all 1.8t manifolds use the stock runners. Here is a picture of the intake manifold that Full-race sells, it is for a transverse and retails for $1310 on their site.

that's a hypertune from australia..I called full race and they don't even stock that thing so be prepared to wait if you want it

[317ssayzarc]

the RMR mani doesnt use OEM runner but its $$$$$$$$$$$$$ as well...

[20vturbo]

the moment you touch the runners you jack the cost..it's very expensive to machine new runners

[F16HTON]

that's a hypertune from australia..I called full race and they don't even stock that thing so be prepared to wait if you want it

The throttle body is facing the correct way for a longitudinal motor though.

[VRTease]

oem runners are absolutely perfect if your using the euro manifold that actually matches the ports on the head. which manifold am i speaking of (engine code?) it may have came on a North american car too but cant remember the engine code off the top of my head. its been a while. :)

[VRTease]

that's a hypertune from australia..I called full race and they don't even stock that thing so be prepared to wait if you want it

holy hotttnessss!

[AudiA4_20T]

Jay Thorton told me he would enjoy making a manifold

Mike Hood, did he not make yours?