Conversation on the FAQ

B6 A4
#1

We can add to it from this post.

PLEASE feel free to let me know if some of the data is wrong or if things need to be changed. I just wanted us to be able to have a starting point to know what we have.

A few good points.
1 I really like the iron sleeves. Thats real good as the B6/B7 S4’s have issues with Cylinder wall issues.
2 The gear raito’s are not all that bad. 4:11 for the Manual. The Automatic is still a little weak but not unusable
3 The low compression ratio. This is good and bad. Its great because you can put boost to it and because we can make good power on crap gas.

A few bad points.

1 The low compression ratio. This is good and bad. bad because it hampers all motor power to a point.
2 Im not sure on the intake manifold. I think there is much room for improvement but If Its what I think there is a giant brick sitting in the path of air flow.

#2

Maybe this is off topic but what is it that is blocking air flow? Is it a flaw in the manifold design itself or something beyond it? And on that note are there any other restrictions that can be/ will need to be modified? (aside from precats)

I understand you might not be able to answer until you’ve had more hands on time with a test car, just curious though.

#3

Here is a picture. Your directly looking threw the area where the throttle body would mount to.

What your looking at is the Flap that controls the runner length. Its directly in the path of the air flow. When your looking to make power having anything like this in the path of the incoming air, especially in the intake manifold, its an issue.

http://audirevolution.net/addons/albums/images/843274532.jpg

#4

Ahhh, gotcha. Don’t see how to get around that :-\

#5

The B6 S4 has the same thing. A design of the flap helps cut this down and make less of an issue. The B6 S4 got 15/15 out of this mod. So safe assumption for the 3.0L should always be 1/2 power wise. Even tho I think we will benefit more from some of the small mods

#6

Oh excellent, shouldn’t be a problem then. Check PM Count, sent you something

#7

Ill have to look but I think its even worse then that for the 3.0. They have two flaps and there right in the way.

I know that for sure. The pre cats are going to be the biggest thing you guys need to get past.

#8

Couple things I was thinking about today. Are you familiar with the exhaust system on the 3.0? I know this is obviously a restriction, and a hinderance with it is that apparently you either have to drop the subframe or lift the engine just to get to the downpipes.
I’m assuming that the simplest form of the tune will need to be accompanied by removing the precats, like the “piggies” that are done with the b6 s4’s… This could prove to be difficult in that case, not sure if that’s true as I haven’t seen it myself.

Next, with the theoretical power gains that will be had from this work, will the stock brakes need to be upgraded? My guess would be no, I compared sizes to a few other vehicles and they were the same or bigger than most cars under 300hp, but I figured I’d ask.

Last is regarding the TIP tranny. I’m guessing outside of forced induction it should be more than capable of holding up to the increased power. You and Keaton touched on improved shifting for it. I know that even in tip shift mode it seems to be delayed, which is rather annoying… is that a limitation of the hardware or software? . While S and tip are definitely way more sporty than D, they are very sluggish compared to the 6 speed… I know a couple companies rebuild the tranny components and apparently that greatly improves the shifting and durability, but my guess is that a lot of that sluggishness is just due to programming. My pipe dream for the transmission would be to have it drive nice and smoothly with increased response in D, but when you switch to S or tip it goes into beast mode with nearly instantaneous shifts. I’m not sure how the s4 was programmed, but I thought I read about it being improved on them. With the S4 was this all done through the ECU? Or did they need the TCU recoded… I guess justincredible could comment on that.

#9

Definitely possible, same idea as the low output timing belt 4.2’s.

Meistah, it sounds like you have a 3.0? If you could take a picture of the front of the intake manifold with the engine covers removed for us it’d be a big help. There should be these little vacuum pieces, and shafts and springs… all this junk that controls the multi-stage intake manifold. A picture of those parts will let us get a good idea if its single or twin flap.

#10

  1. For the exhaust work a lot of time the shop manuals will quote that you need to do a lot more work than what is necessary to do what you are intending. I wouldn’t worry too much about getting in there, shouldn’t be terribly different than an S4.

  2. You should be alright with the stock brakes, but if it gets to the point of worrying you the B6 S4 parts should bolt on and provide more than enough braking power for any street driving. Plus you’d also be able to get the JHM LW rotors in that case.

#11

Beemercer beat me to the punch. To start with like he stated with the brakes stock should be more than plenty but weight is weight so the light weight package would be benificial for shaving weight but not needed.

As for the exhaust I have been under enough of these cars(audi’s) to know that it’s alot easier than specified in your manual or what a dealer/pro will tell you!

The auto tranny in my personal opinion the 3.0 comes with a very strong automatic trans and since computer controlled can be changed with the proper tune. ( Count please interject with any info).

#12

Also an S4 with the stock trans with no mods in tip is still kinda blah fun but blah same in sport, so yes room for ton’s of improvment.

#13

Yea I was supposed to take some pics of the engine and TCU for countvohn… busy week and I haven’t had time to yet, will as soon as I can though!

#14

Oh and good to know about the exhaust and brakes, glad to know we have a solid knowledge base on here already :slight_smile:

#15

A few things.

The 6hp is in the B6 S4
The 5hp is in the B6 A4

The 6 can’t be adjusted right now. Other then a few things in the ECU
The 5 should be a removable TCU under the passenger seat.

The Tip transmissions are very strong. Looking at the B5 S4 The tip transmissions hold up to well over 400whp. So I think the 3.0 should be fine.

The TCU modifications for the 5hp are amazing. That alone will wake up the car. The 2000 A6 picked up 1 full second with just a ECU Tune TCU Tune and a exhaust. I would be willing to say the same can be said for the 3.0

That may sound bold but I think it can be done.

#16

Add to the FAQ

  • The most important innovations: Aluminium engine block

New, lighter pistons

Balancer shaft

Continuous intake camshaft adjustment

Exhaust camshaft adjustment

New two-position variable intake manifold

Bosch Motronic ME 7.1.1 with electronic throttle control

Compliance with EU IV emission standard

The new Audi 3.0 V6 engine is consequently not only tremendously powerful, but also one of the most modern engines of its kind.

Apart from its basic concept, the arrangement of the cylinder banks at an angle of 90 degrees and the identical bore, the new engine shares only very few components with its 2.8-litre predecessor.

#17

I’ll need to confirm this but I believe much like the 2.8, the 3.0 has high flow heads (optimized for being N/A from the factory)… this is apposed to the tight ports on the 2.7T

#18

They do from what I remember. They flow real well. Im sure there is room for improvement still.

#19

The 2.8 heads have runners in the intake port of the heads. The 2.8 heads have almost the same valves as the 2.7T heads. On average the 2.8 heads flow better have larger ports and have a larger lift on the cam then the 2.7T heads. The only issue in the 2.8 heads is the springs.

How will this relate to the 3.0 heads I’m not sure. Ive read that the 2.8 and 3.0 do share lots of the same components.