w12 swap.....?

[alterdcreations]

hey guys. i have been thinking. i want more power out of my 4.2 and i think a engine swap would be second best to buying a rs6.
i have a 01e swapped 4.2 and after looking around for info i think it can be done faily affordably. i would think that the stand alone ecu would be the most trouble.

so far from what i understand the rs6 4.2 zf transmission and the w12 transmission are the same. if so then a rs6 6speed adapter plate and flywheel should bolt up........but the w12 from the a8 is different from the w12 in the pheaton. does any one have any more info?

[aysix]

Interesting. I thought it used the same tranny as the W8, thus meaning it has the same tranny as a 1.8t passat, and a 1.8t bolts to a 01e without any modification? I'm pretty much guessing here but when scotty chimes in you will have your answer.

[AudiA4_20T]

hey guys. i have been thinking. i want more power out of my 4.2 and i think a engine swap would be second best to buying a rs6.
i have a 01e swapped 4.2 and after looking around for info i think it can be done faily affordably. i would think that the stand alone ecu would be the most trouble.

so far from what i understand the rs6 4.2 zf transmission and the w12 transmission are the same. if so then a rs6 6speed adapter plate and flywheel should bolt up........but the w12 from the a8 is different from the w12 in the pheaton. does any one have any more info?

Yessir. SteveKens plate setup should work on one of them. I heavily looked into this swap. If you have a 4.2 it should fit no problem. Wiring will be easy as well, it's also ME.7. If you actually attempt this I'll make the harness for you. Honestly might just plug in though. You need to figure out the Power Steering and A/C hoses. Other than that it should work. Not sure about engine mounts either.

Interesting. I thought it used the same tranny as the W8, thus meaning it has the same tranny as a 1.8t passat, and a 1.8t bolts to a 01e without any modification? I'm pretty much guessing here but when scotty chimes in you will have your answer.

Nope W8 could be used with 01E, not the same bellhousing

[Scotty@Advanced]

hey guys. i have been thinking. i want more power out of my 4.2 and i think a engine swap would be second best to buying a rs6.
i have a 01e swapped 4.2 and after looking around for info i think it can be done faily affordably. i would think that the stand alone ecu would be the most trouble.

so far from what i understand the rs6 4.2 zf transmission and the w12 transmission are the same. if so then a rs6 6speed adapter plate and flywheel should bolt up........but the w12 from the a8 is different from the w12 in the pheaton. does any one have any more info?

Not entirely true. The first gen W12 shares a similar transmission (5HP24) as the RS6 however I'm not sure how similar it is in terms of the bellhousing. Later W12's use the same transmission family as the V10 (6HP26 IIRC).

But we didn't get that engine in the D2. I suspect that the bell housing is the same, but you'd be on your own investigating this. Also the early W12 engines are crap, something like 80% of them broke crankshafts. Also the flex plate and starter are different on the W12 so that also may be an issue.

The W12 is also a very wide and heavy engine, it is quite a bit wider than the V8 by about 6 inches if my memory isn't failing me, so fitment into the A6 may be a problem as well.

I'm not saying it can't be done it would probably be way cool but since you'd be the first plan on spending some good money for the research.

[redneck truck]

I'd just as soon see a built V8 as a W12 swap. Why don't you do that instead, and blueprint it so I can follow suit.

[alterdcreations]

Honestly im trying to avoid buying a rs6. i figure a t4 twin scroll at the rear mufler would be simple enough but a 12 psi how long will the 4.2 last.
2.7tt would be easier but more costly. question....is the 3.6 from a q7 pretty much the same as a r32 plus the displacement. that would be nice with a turbo and intake manifold .
pretty much i will have to replace the clutch in the car in a month or so and that would be the best time to get the whole thing out of the way.
the goal is about 500whp on 93 pump.

[redneck truck]

Sounds like somebody's got a lot of reading, learning, and R&D on their hands. Good luck, and post up your progress frequently.

[alterdcreations]

just looking on ebay 2.7t $1500
r32 $3600
3.6 $6000
just a thought

[8520]

Bang for the buck, 500whp is most easily attainable with a 2.7t and a big single turbo. I believe max hit 500whp without meth on fairly low boost with that setup.

*edit* don't get me wrong, I'd love to see a w12 swap, however, I don't believe it will be the easiest/cheapest way to attain your goals.

[alterdcreations]

how much hp can the stock pistons handle? could i get oem rs6 pistons and connect them to a rod of my choosing? .....also not many intake manifold options out their.......i have a pheaton v8 manifold i could gut out.......thanks on the input. my car is a 2000 a6. will a stand alone ecu clear the emmisions check engine light test ?

[8520]

It seems like you're trying to reinvent the wheel for the sake of reinventing the wheel, which is fine if that's what you're going for, but you mentioned you wanted 500whp and as I already mentioned the 2.7t is the best/most cost effective way to do this.

As for your last questions, I'm not sure which motor you're referring to, but with the 2.7t the motor is good for 500whp with just rods from my understanding.

You will have a hard time passing emissions with a stand-alone ecu since your stock ecu will not pass readiness tests without some serious coding.

[AudiA4_20T]

I have a cheap RS6 motor with everything... Let me know if you're interested

[redneck truck]

Clint, your PM box is full. Talk to me about this RS6 motor you've got. I'm interested.

[AudiA4_20T]

it's unfull

[Cole]

Bang for the buck, 500whp is most easily attainable with a 2.7t and a big single turbo. I believe max hit 500whp without meth on fairly low boost with that setup.

*edit* don't get me wrong, I'd love to see a w12 swap, however, I don't believe it will be the easiest/cheapest way to attain your goals.

?.the 2.7t is the best/most cost effective way to do this.



You will have a hard time passing emissions with a stand-alone ecu since your stock ecu will not pass readiness tests without some serious coding.

The "easiest" would be to keep the 4.2L, supercharge it, exhaust, maybe higher flowing heads and cams. Would probably be more reliable than the 2.7T too!

Not to mention some awesome supercharged V8 torque!

[8520]

The "easiest" would be to keep the 4.2L, supercharge it, exhaust, maybe higher flowing heads and cams. Would probably be more reliable than the 2.7T too!

Not to mention some awesome supercharged V8 torque!

I highly doubt any of the kits available for the c5 4.2 will net 500 to the wheels though. That is a tall order to add 200whp with a supercharger.

[Cole]

Still a much easier approach , and likely cheaper, than swapping motors and trying to do all the mods to get 500whp out of a 2.7. Way more usable on a V8 too.

[alterdcreations]

Easiest thing is to keep the 4.2 with a low pressure turbo in bumper. The cost of a 660r kit would be more than the parts and labor cost to run the piping for a remote turbo on the 4.2..either way I would have to do somthing with the ecu. But swapping out rods and sta/cking head gaskets in the 4.2 would get me a stronger engine than a 2.7.

[Cole]

As much as I like boost......it's way more fun to boost big displacement!

[beemercer]

I highly doubt any of the kits available for the c5 4.2 will net 500 to the wheels though. That is a tall order to add 200whp with a supercharger.

yeah anything with an M90 or M112 isnt going to do it

this one did, 2.3L kenne bell on an S8 motor

[8520]

Still a much easier approach , and likely cheaper, than swapping motors and trying to do all the mods to get 500whp out of a 2.7. Way more usable on a V8 too.

More usable, sure.

Easiest thing is to keep the 4.2 with a low pressure turbo in bumper. The cost of a 660r kit would be more than the parts and labor cost to run the piping for a remote turbo on the 4.2..either way I would have to do somthing with the ecu. But swapping out rods and sta/cking head gaskets in the 4.2 would get me a stronger engine than a 2.7.

Do you think that you have to run standalone no matter what you do?

As for pricing, I don't have excel on my iPad so I can't do a cost comparison that easily. A remote turbo kits fabrication alone would likely cost you thousands upon thousands of dollars.

[alterdcreations]

not stuck on stand alone. and honestly the cost of the turbo setup depends on who is spending the money and how far they are willing to precure and mock up parts before it handed oner to the welder. outside of the welding i would handle everything from laying the oil lines, turbo placement and support as well as the intercooler. a nice bg S400 turbo is under a grand , a oil scavange pump is about two hundred, air to liquid intercooler set up is about 500.
i shouldn't have a problem setting them up where they are going to be. When i drop it off it will just be for the exhaust,from where the downpipes terminate(cats already deleted). then run the two exhaust pipes into a twin scroll 2-1 manifold into the turbo under the right side of the car. run intercooler pipe over the driveshaft in the tub(mayde sick air to liquid intercooler their as well) then to the throttle body. simple enough and a day at the fab shop(hopefully)
that should be less $$ then a tial 660r kit .
for the record i have owned a 2.7t a6, and i like the v8 better

[RudeJude518]

I wanna see results on this!!!

[redneck truck]

If cost is an object, if it's of any consequence at all, this project is not going to happen, so don't bother waiting up for results.

[alterdcreations]

lol! i'll make a picture thread whatever its finished.....but no w12 so this thread is pointless

[8520]

not stuck on stand alone. and honestly the cost of the turbo setup depends on who is spending the money and how far they are willing to precure and mock up parts before it handed oner to the welder. outside of the welding i would handle everything from laying the oil lines, turbo placement and support as well as the intercooler. a nice bg S400 turbo is under a grand , a oil scavange pump is about two hundred, air to liquid intercooler set up is about 500.
i shouldn't have a problem setting them up where they are going to be. When i drop it off it will just be for the exhaust,from where the downpipes terminate(cats already deleted). then run the two exhaust pipes into a twin scroll 2-1 manifold into the turbo under the right side of the car. run intercooler pipe over the driveshaft in the tub(mayde sick air to liquid intercooler their as well) then to the throttle body. simple enough and a day at the fab shop(hopefully)
that should be less $$ then a tial 660r kit .
for the record i have owned a 2.7t a6, and i like the v8 better

What I heard: "all I gotta do is....."