Why isnt there more rs6 swap b5 s4?

[MarnellBalmeo]

I picked up a second 03 RS6 that has what appears to be a bad trans.
Well, this got the ball rolling in my head. Since I already have an RS6 and really like the s4 as well(because of the weight and the rear look) why not have the best of both and swap the engine to an S4.

b5 s4 is plentifull here and I would have everything I would ever need since I have a donor rs6. I'm thinking using the manual conversion to get the engine mated to the trans. All i would need then is fabing a motor mount and figuring out the little things(this will probably take a while)

it seems that based on this thread it would fit?
https://www.audizine.com/forum/showt...ne-in-s4/page2

but I have not found other sources that have done the swap with a build thread.


Is it the cost or not being able to find a donor car/engine is a reason why people arent doing this?

[Nollywood]

I’m not clear what you’re trying to do.

Are you looking to install the C5 RS6 engine in a B5 S4? Or do a manual swap in the RS6 with bad transmission?

Either way, you don’t need an adapter plate to mate the engine to a 5 or 6-Speed manual.

[julex]

I think there is simply physically no space for that engine in S4 engine bay, I believe length wise.

[JorisRS6]

Any thing is possible.
Nollywood that posted above is swapping an rs6 engine into a b6.
However. There are many obvious reasons not to do it.
If you like the b5 look. Why not stick with the 2.7. Its much cheaper and easier to push that engine.
The bcy fits tight in the c5 bay. I can only imagine how tight it would be in the b5.
Its also going to be very expensive. Dealers and aftermarket charge an arm and a leg when it comes to rs parts.
It would make the s4 very nose heavy and maybe less fun to drive than with a stage 3 2.7 in it
And the c5 body looks much better than the b5 imo
The only reason to do it would be to get a very cool and unique car i think
Do some more research too

[Nollywood]

The 2.7T is actually heavier than the 4.2T.

Yesterday, the 2.7T will give good results, but the 4.2T has more potential. Heck, a 1.8T will make 500hp, but it’s still a small displacement engine.

[JorisRS6]

The 2.7T is actually heavier than the 4.2T.

Yesterday, the 2.7T will give good results, but the 4.2T has more potential. Heck, a 1.8T will make 500hp, but it’s still a small displacement engine.

Didnt know that.
I still dont think its worth it.
Just keep the engine in the rs6 and get that trans rebuild or get a manual.

[JMURiz]

+1

Stick with the RS6 body and do what he SpeedWorld Challenge teams did...use an S4 transmission :D
https://www.caranddriver.com/feature...di-rs-6-page-4

[Nollywood]

Didnt know that.
I still dont think its worth it.
Just keep the engine in the rs6 and get that trans rebuild or get a manual.

The C5 RS6 is a great car, no doubt - I’ve owned a 2004 Avant in Daytona Grey.

But, it’s no B5 or B6. It’s heavy, and the interior is pretty dated compared to a B6/7. A C5 RS6 with 480hp will still be slower than a B5/6 running 450hp with the same engine.

Worth it? I guess it all boils down to what styling suits you, and how mechanically adept you are, in terms of a swap.

[MarnellBalmeo]

The 2.7T is actually heavier than the 4.2T.

Yesterday, the 2.7T will give good results, but the 4.2T has more potential. Heck, a 1.8T will make 500hp, but it’s still a small displacement engine.

mainly because of this. A 2.7 can make the power but would lack displacement.
This is the number 1 reason why I went with the RS6=makes same power on a chip vs stage 3? and with v8 curve. But its heavy...


This guy claim it fits:
https://www.audizine.com/forum/showt...=1#post4253003


To clarify what I was thinking was buying a manual b5 s4 and swapping in the rs6 engine.

I would keep the rs6 as is and just fix it BUT I already have one. The blue one is in great condition and will get all the power mods already. No point of having the same car so ideas started floating in my head

Capture.jpg

The plan is to fabricate the mods on the silver one and transfer it to the blue one(no downtime on my DD).

once thats done I have 3 options:
1. take the auto from the blue one(since it will be manual swap), put it in the silver one and sell it.
2. use the silver one as a donor car or a b5 s4 swap(and partout what ever i dont need.)
3. using this shell as a base for a body swap. (this would get either a datsun shell or vega shell on top.)(this would be least likely though but its something ive considered.)

[MarnellBalmeo]

I’m not clear what you’re trying to do.

Are you looking to install the C5 RS6 engine in a B5 S4? Or do a manual swap in the RS6 with bad transmission?

Either way, you don’t need an adapter plate to mate the engine to a 5 or 6-Speed manual.

btw are you sure about this? I was looking at manual swapping the C5 RS6 and its calling for an adaptor/flywheel and starter kit.

I mean it may not be a plate? but its a conversion kit that cost 2.1k

http://advancedautomotion.com/shop/p...roducts_id/312

[JorisRS6]

I would go with option 1.
I personally like the c5 body much better than the b series. Ive owned a b7 for two years and the interior is too small. Only 4” between the driver side and rear seat when i was driving.
Big engines belong in big cars.
I know someone thats swaping the engine into an s6 avant. Thats a much cooler project i think. And easier too probably.
As far as that plate goes, it seems that you dont necesarily need it but that just not all bolt holes line up. Or ive heard of drilling and tapping more holes in the block.
The plate will be the best option when you have limited time. You sound like you have more time.
I woukd start pulling the engine on the silver one. If you see how tight it is in the c5 you will start thinking twice about putting it in the b5.
Ive seen your thread on rs6.com. Good thread. Just dont always listen to those guys there lol. They told me i woulnt be able to do an engine pull with my experience and that 20x9 wheels wouldnt fit haha.
Funny how they were all wrong about the manifolds too. Good luck. If you start something be sure to post about the progress here

[Nollywood]

If you do your homework, you won’t need any sort of adapter plate.

I ran the larger RS6 block in my old B5, through an 01E. No adapter.

[MarnellBalmeo]

If you do your homework, you won’t need any sort of adapter plate.

I ran the larger RS6 block in my old B5, through an 01E. No adapter.

Thats good news, I just always thought it needed it. Thanks, this could really drop the cost down.

I would go with option 1.
I personally like the c5 body much better than the b series. Ive owned a b7 for two years and the interior is too small. Only 4” between the driver side and rear seat when i was driving.
Big engines belong in big cars.
I know someone thats swaping the engine into an s6 avant. Thats a much cooler project i think. And easier too probably.
As far as that plate goes, it seems that you dont necesarily need it but that just not all bolt holes line up. Or ive heard of drilling and tapping more holes in the block.
The plate will be the best option when you have limited time. You sound like you have more time.
I woukd start pulling the engine on the silver one. If you see how tight it is in the c5 you will start thinking twice about putting it in the b5.
Ive seen your thread on rs6.com. Good thread. Just dont always listen to those guys there lol. They told me i woulnt be able to do an engine pull with my experience and that 20x9 wheels wouldnt fit haha.
Funny how they were all wrong about the manifolds too. Good luck. If you start something be sure to post about the progress here

Im not a fan of avant so thats out for me. And the other major attaction for the S4 is the weight. I honestly wouldnt consider it if it has the same weight. But loosing 500lbs is pretty dam good. I am piecing together a weight reduction list for the RS6 but its more $$ per lbs. I will probably drop 100-150lbs and stop there- or maybe not bother and spend that money to make more power

Can you imagine a 3500lbs b5 S4, 4.2LTT at 800awhp lol sounds like pipe dreams until someone builds it

Not too concern with space as I will still keep the RS6. Majority of the time im driving Solo on my commute. Considering im coming from coupes any sedan will be roomy hahaha.
Plus we also have a CTS and will be picking up an SUV soon so yea.

Yea RS6.com is an interesting forum, Its a good thing im not one to get swade easily from doing what I want, otherwise that would be the end of my plans hahahaha

[Bordom]

Thats good news, I just always thought it needed it. Thanks, this could really drop the cost down.



Im not a fan of avant so thats out for me. And the other major attaction for the S4 is the weight. I honestly wouldnt consider it if it has the same weight. But loosing 500lbs is pretty dam good. I am piecing together a weight reduction list for the RS6 but its more $$ per lbs. I will probably drop 100-150lbs and stop there- or maybe not bother and spend that money to make more power

Can you imagine a 3500lbs b5 S4, 4.2LTT at 800awhp lol sounds like pipe dreams until someone builds it

Not too concern with space as I will still keep the RS6. Majority of the time im driving Solo on my commute. Considering im coming from coupes any sedan will be roomy hahaha.
Plus we also have a CTS and will be picking up an SUV soon so yea.

Yea RS6.com is an interesting forum, Its a good thing im not one to get swade easily from doing what I want, otherwise that would be the end of my plans hahahaha

Already done, but insane amounts of custom
https://youtu.be/PrrLSrmwtHY

Sent from my SM-G935W8 using Tapatalk

[MarnellBalmeo]

Already done, but insane amounts of custom
https://youtu.be/PrrLSrmwtHY

Sent from my SM-G935W8 using Tapatalk

meh, RWD. Was hoping one that keep the quatro

[Nollywood]

meh, RWD. Was hoping one that keep the quatro

That car could have retained AWD.

The owner must have lost it by choice, as there’s nothing in this particular swap that would necessitate the need to convert to RWD.