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View Full Version : AEB-VR6 Throttle body swap



offroader1006
06-26-2008, 06:21 PM
I recently got some throttle codes and went into limp mode, which was nice for gas mileage, but not so great for fun factor.

so i decided to upgrade instead of just replace.

i contacted 034 and ordered the adapter plate and VR6 OBD2 throttle body.

http://www.034motorsport.com/oscthumbwm/w/550/h/498/q/95/f/jpg/fltr/wmi%7CphpThumb/watermarks/034watermark%7CC%7C20%7C0/hash/430410a2232ae01448ed236b17627150/src/images/TBadaptor1.jpg

http://www.034motorsport.com/oscthumbwm/w/550/h/591/q/95/f/jpg/fltr/wmi%7CphpThumb/watermarks/034watermark%7CC%7C20%7C0/hash/933709b3d41b9392b01854d80e22d1dc/src/images/VR6TBa.jpg

i was planning on it being a direct bolt on, buuuuuuuuuuut . . .

the adapter cocks the TB 45 degrees, and the bottom bolt hits the ear on the intake manifold for the support bracket.

so i went the hard(right) way and used some MB trans pan aluminum bolts(ones for the new magnesium pans) and cut em off and re drilled new holes and milled the center bore per the gasket.

i bent the cable bracket a little towards the TB and removed the plastic holder for cyl 1 & 2 injector connectors and ran the cable through that spot.

here is where i can't decide what to do.

the OEM AEB throttle doesnt use the two large vacuum ports that the VR6 has.

anyone know of an aesthetic way to block them off, or something i could use them for?

right now i have a length of hose looped between the two, tucked under the manifold.

i must say, the guys at 034 were, as usual, very helpful. the whole transaction was carried out leisurely on AZ pm's. the adapter, hardware and gaskets were all top notch.

t1demont1
06-26-2008, 06:27 PM
You could weld them shut? or get some vacuum caps.

mike-2ptzero
06-26-2008, 06:59 PM
Those are not vacuum ports. They are just the inlet/outlet of a U for running coolant thru the TB housing.

jlien08
06-26-2008, 08:04 PM
liquid cooled TB? WTF?

mike-2ptzero
06-26-2008, 08:13 PM
liquid cooled TB? WTF?

You mean liquid heated. It would be hard to cool the TB with coolant seeing that once the engine is at running temps the coolant is going to be hotter then the TB or the air flowing thru it.


Basically it was designed in the same way the oil/coolant heat exchanger, allowing the coolant to get the oil up to temp quicker.

jlien08
06-26-2008, 09:18 PM
makes sense. i haven't seen that before.

Wizard-of-OD
06-26-2008, 10:00 PM
Those are not vacuum ports. They are just the inlet/outlet of a U for running coolant thru the TB housing.
They are vaccuum ports.That is an OBD-II 2.8 V6 throttle body MIke,not OBD-1 VR6 like yours...

If anyone wants a conversion kit let me know.We have 10 brand new 2.8 V6 throttle bodies in stock @ $225US each[o_o]

VTECCURED
06-27-2008, 05:35 AM
OffRoader:
any comments on this TB upgrade? Do you have BT setup, or stock?
Have you noticed any increase in response or power thru the powerband?


thanks
JOHN

docurley
06-27-2008, 06:08 AM
How this all work and are there any gains to be had and does it work on ndbw cars, oh and why did you have problems fitting this if its a direct replacement?

mike-2ptzero
06-27-2008, 07:00 AM
They are vaccuum ports.That is an OBD-II 2.8 V6 throttle body MIke,not OBD-1 VR6 like yours...

If anyone wants a conversion kit let me know.We have 10 brand new 2.8 V6 throttle bodies in stock @ $225US each[o_o]

Wow that is weird, seeing that the ports look exactly the same. oh well seems I learned something new today. Just an odd place to put vacuum ports.

Well I guess all he had to do was blow thru the port and see where the air came out.[>_<]


To block them off all he needs to do is visit an autoparts store like Kragen and buy some vacuum covers, just make sure to clamp them down good since they will get boost pressure.



How this all work and are there any gains to be had and does it work on ndbw cars, oh and why did you have problems fitting this if its a direct replacement?

Gains are most likely going to depend on how much air flow you are trying to force thru the TB, so the higher the hp you are making the more gains you will see.

offroader1006
06-27-2008, 11:41 AM
i noticed a big difference in throttle response.

i am only on a k04 so no real power gains.

but off idle throttle and part throttle driving are much easier now.

and i havent found any caps big enough for a clamp to fit on.

Wizard-of-OD
06-27-2008, 11:45 AM
To block them off all he needs to do is visit an autoparts store like Kragen and buy some vacuum covers, just make sure to clamp them down good since they will get boost pressure.
Yup[up]


i am only on a k04 so no real power gains.
There is a power gain to be had....I would wager 4-6whp at least.If you look @ the SIZE of the AEB throttle plate you would laugh.The DBW models come with a larger throttle body but most people dot mention that.

Regardless the 2.8 V6 throttle body has a 65mm throttle plate.More than enough!

mike-2ptzero
06-27-2008, 12:24 PM
i noticed a big difference in throttle response.

i am only on a k04 so no real power gains.

but off idle throttle and part throttle driving are much easier now.

and i havent found any caps big enough for a clamp to fit on.

The black ones in this picture aren't big enough?

http://www.4x4wire.com/toyota/reviews/fullfloater/2.jpg



BTW JCWhitney sells a kit with 50 caps
Color-coded vinyl. Includes 10 each of the following sizes: 1/8", 3/16", 1/4", 5/16" and 3/8".

Wizard-of-OD
07-15-2008, 12:02 AM
DBC OBD-II throttle bodies BACK in stock.Who wants?

VTECCURED
07-15-2008, 06:36 AM
Ok... ill take one...
with the adaptor...

Should i go through the website.. or just through u?

Does it matter whether or not its a v6 or vr6 or even a s4? Is there one bigger then the other ?

Thanks Issam

JOHN

Wizard-of-OD
07-15-2008, 06:58 AM
Ok... ill take one...
with the adaptor...

Should i go through the website.. or just through u?

Does it matter whether or not its a v6 or vr6 or even a s4? Is there one bigger then the other ?

Thanks Issam

JOHN
S4's have a DBW throttle body.
The V6 and VR6 DBC throttle bodies have different vaccuum breather ports.
Check your pm.

Wizard-of-OD
07-15-2008, 09:47 PM
Bump for High flow Intake manifold porn...sorry to those who missed out on this.5 of these will find homes tomorrow morning[:|]

http://i226.photobucket.com/albums/dd25/issamabed/DSC_0006.jpg

Militant-Grunt
07-15-2008, 10:22 PM
Loving the intake manifold porn, details on gains etc?

t1demont1
07-15-2008, 10:22 PM
issam that motor looks damn sexy

Vreihenmotor6
07-16-2008, 10:06 AM
dry sump eh?

djwimbo
07-16-2008, 10:42 AM
Isn't that a transverse 1.8T?

I just got all sorts of confused trying to figure out how that would fit a Mk4 car....

Nice dry sump though.

Have you guys done anything with porting stock AEB intakes? I'm messing with a spare one I have around. There's a handful of places that need some attention inside of that thing. I should be bolting it up tonight, I'll see if it makes a difference.


Bump for High flow Intake manifold porn...sorry to those who missed out on this.5 of these will find homes tomorrow morning[:|]

http://i226.photobucket.com/albums/dd25/issamabed/DSC_0006.jpg

DuviVr6
07-16-2008, 01:44 PM
this TB used here is from what generation of VR6's?

onemoremile
07-16-2008, 04:16 PM
That is project 2220 and it is not transverse.

t1demont1
07-16-2008, 04:33 PM
It all depends on what your car is. If your a DBC then your tb will be from the 12v vr6 wich is dbc, if your dbw then it will come from a 24v vr6 which is also dbw.

Wizard-of-OD
07-16-2008, 09:20 PM
That is project 2220 and it is not transverse.
So much for deterioration [;)]

DBC upgrades = 2.8 V6 Passat throttle body or VR6 OBD-II DBC throttle body.

VTAudiA4
07-16-2008, 09:52 PM
What is the size of a stock ATW throttle body? Just wondering....

Wizard-of-OD
07-17-2008, 04:42 PM
What is the size of a stock ATW throttle body? Just wondering....
ATW is DBW? if so then its approx 58mm

mike-2ptzero
07-22-2008, 06:59 AM
Yes ATW is dbw, thats the 2000.

djwimbo
07-22-2008, 03:35 PM
That is project 2220 and it is not transverse.

2200? like 2.2L of turbo spoolin fury?

I realized later that I wasn't thinking correctly. Once I had my car in the "service position" I understood it more.

Wizard-of-OD
07-23-2008, 04:46 PM
2200? like 2.2L of turbo spoolin fury?

I realized later that I wasn't thinking correctly. Once I had my car in the "service position" I understood it more.
You do or dont have a VR6 throttle body?

djwimbo
07-24-2008, 06:09 PM
You do or dont have a VR6 throttle body?

I do not have a VR6 throttle body. I do have a stock AEB nDBW Throttlw body with about 5mins worth of porting done by yours truly.

Why do you ask?

This little throttle body...
http://i305.photobucket.com/albums/nn218/djwimbo/DSCF1327.jpg

leon
11-15-2008, 02:17 AM
I have an AEB DBC, can i use the TB of an AAA VR6....?

slopoke
11-15-2008, 07:23 AM
So being the dbw tb's are larger can you mod one to be dbc?

Wizard-of-OD
11-15-2008, 12:55 PM
I have an AEB DBC, can i use the TB of an AAA VR6....?
Depends on the year of the VR6.
You need an OBD-II Throttle body from the VR6.

So being the dbw tb's are larger can you mod one to be dbc?
I wish but not by a long shot.One of the biggest advantages of DBW is the ability to go Mafless and as large as an 80mm DBW throttle body for peanuts.With DBC you are pretty much stuck @ 65mm unless you go standalone (which most will not do.).

leon
11-16-2008, 12:31 AM
This is an ODB 2...?

http://i10.ebayimg.com/06/i/001/17/78/454c_1.JPG

Don Supreme
11-16-2008, 07:00 AM
Those are not vacuum ports. They are just the inlet/outlet of a U for running coolant thru the TB housing.

Wrong AGAIN!

mike-2ptzero
11-16-2008, 07:37 AM
Wrong AGAIN!

LOL, actual I was 50% right since thats what they are on my OBD1 VR6 TB and if you didn't notice that was pointed out 5 months ago. [:p]


But hey thanks for showing us how slow you are.[;)][>_<]

Wizard-of-OD
11-16-2008, 11:29 AM
This is an ODB 2...?

http://i10.ebayimg.com/06/i/001/17/78/454c_1.JPG

Yup thats OBD-II


Wrong AGAIN!
He is actually right.SOme of the OBDII throttle bodies do have coolant feed and return lines as they sat over a hot exhaust manifold on the VR6.The idea was to stop the throttle body for heating up and "shutting".

leon
11-16-2008, 01:47 PM
Thanks!

b5a4gt28
11-23-2008, 10:01 AM
Any pictures of the tb setup on the car? I am curious to how the tb sits on an angle.

B5A4Kevin
11-23-2008, 09:16 PM
speaking of large throttle bodies, has anyone seen the 4.2l rs4 tb? it could swallow an civic whole! i tried looking for a pic but twas all in vain. anyone got a pic or inner diameter specs? i think its in the 70-80mm range.

Wizard-of-OD
11-23-2008, 09:25 PM
speaking of large throttle bodies, has anyone seen the 4.2l rs4 tb? it could swallow an civic whole! i tried looking for a pic but twas all in vain. anyone got a pic or inner diameter specs? i think its in the 70-80mm range.
80mm

djwimbo
11-23-2008, 10:48 PM
Mustang 80mm TB's are much cheaper, and for us nDBW(aka DBC) guys, that's the way to go.

sean1.8t
11-24-2008, 12:30 AM
Mustang 80mm TB's are much cheaper, and for us nDBW(aka DBC) guys, that's the way to go.

didn't Issam just finish saying that 65mm V6 TB was the largest DBC can go?

and for us DBW guys, spending 10 grand on the RS4 TB is not the way to go.

spending a couple bills on the Dodge Hemi 80mm TB is the way to go [up]

JK35
07-31-2009, 01:06 PM
I picked up an OBD1 VR6 TB to use on my stroked AEB. The 65mm diameter matches the intercooler piping alot better than the puny stock TB, BUT, I don't know where to find a TPS connector for it, NOR do I see any provisions for idle control aside from the little mechanical set screw.

Does anyone know where to find bare connector housings/crimp pins so I can properly terminate my harness into the correct TPS plug?

Also, what did these cars use for idle control? IAC motor on the IM?
With my AEM EMS, I can control stepper motor idle control, PWM solenoids, pretty much anything, but unfortunately, the VR6 TB I have doesn't have anything on it for idle control.

If you use a 65mm OBD1 VR6 throttle body, what are you using for idle control?

mike-2ptzero
07-31-2009, 02:08 PM
Call up 034, they are the ones that put that same TB on my car. I dont use anything for idle control, car idles low when its cold and then once its warm it idles around just over 1500 rpm but thats not a problem for me since I just drag race.

database14
08-03-2013, 07:25 AM
Issam, they are coolant ports, 2 line from the top radiator hose run to it, I bypassed mine not too long ago, Mike you ARE right.

Marc.

A4Rob
08-03-2013, 08:31 AM
4 years later...

bw86
08-03-2013, 08:52 AM
4 years later...

[>_<]

Corrado_Guy
08-03-2013, 08:55 AM
4 years later...

It may be 4 years later but he is still right. They are coolant lines and they are there to stop the throttle body from freezing in really cold areas. Most places don't need them but if you get under freezing in a NA motor they are a good idea but boosted motors heat the intake air so it is not an issue and they can be blocked off or left open, makes no difference.

M-Hood
08-03-2013, 10:21 AM
It may be 4 years later but he is still right. They are coolant lines and they are there to stop the throttle body from freezing in really cold areas. Most places don't need them but if you get under freezing in a NA motor they are a good idea but boosted motors heat the intake air so it is not an issue and they can be blocked off or left open, makes no difference.

I just happened to look at the bottom of my throttle body the other day while I was installing a engine diaper, they are still unplugged. I wonder what would happen if I connected some lines to mine and ran them to a tank/pump with really cold water.

Corrado_Guy
08-03-2013, 11:39 AM
It would certainly reduce the heat soak in the throttle body but you would need to weigh this against the extra weight you will need to carry to make this work. As long as you could keep the water cold it would help to reduce the intake air temps but it is hard to say how much and if it would be worth it.

M-Hood
08-03-2013, 04:50 PM
It would certainly reduce the heat soak in the throttle body but you would need to weigh this against the extra weight you will need to carry to make this work. As long as you could keep the water cold it would help to reduce the intake air temps but it is hard to say how much and if it would be worth it.

It would be a very small tank mounted in the engine bay, so the lines would be very short and no more then 1-3 gallons of water. Kind of like a water/ice tank for a air to water intercooler setup for a drag car.

csosnowski
08-03-2013, 08:11 PM
so what is the most effective throttle body upgrade for someone with an aeb manifold, head, and dbw? and is there anything special that needs to be done electrically or in the tune to make it work?

M-Hood
08-03-2013, 09:33 PM
so what is the most effective throttle body upgrade for someone with an aeb manifold, head, and dbw? and is there anything special that needs to be done electrically or in the tune to make it work?

Stock unless the car is highly modified running a very large turbo.

csosnowski
08-04-2013, 08:18 AM
Stock unless the car is highly modified running a very large turbo.

sorry, forgot to mention large turbo.

does the BDF throttle body need to have maps changed in the tune for it to work?

offroader1006
12-10-2014, 09:41 AM
Issam, they are coolant ports, 2 line from the top radiator hose run to it, I bypassed mine not too long ago, Mike you ARE right.

Marc.

Some have coolant ports, mine did not. They were 100% intake air ports.
If I hooked them to coolant, it would reduce the heat in the tb after the coolant passed the intake valves.