Just bought a 4.2

[b5jimbo]

So my s4 currently has 250k on the clock, and I plan on driving till somthing blows. When it does I'm going to swap in a 4.2l. I came across a guy selling a 2000 a6 4.2 (art) with the harness, ecu, and all accessories for 500$ a deal so good I had to buy it. Now I know the a4 guys do this, should I put this thread in the a4 tech section? If not maybe a first in this section. Plan on it taking a min of 6 months, I want to refresh the engine while it's out. My main concerns are if I have to modify the subframe, and electrical because the a6 was an auto so will I need the ecu coded for a manual trans. Any info please add. Also yes I know 2.7s make more power, I really just want an N/A v8, reliable and they sound amazing. Thanks

[jasongtr]

quite right, who cares about power figures on the 2.7tt, im doing a 4.2 40v conversion from a C5 S6 in my B5 RS4

[DieselElectric]

I don't get it. Where's the punch line?

[jasongtr]

dont get what?

[hibiscusS4]

I don't get it. Where's the punch line?

that will come later when the chain guides fail

[AudiSport12]

^Belt driven my friend.

[jasongtr]

/\ haha

[DieselElectric]

C5 is a belt yes, but I just don't see the appeal of the swap. All that work for less power than a tuned k03 2.7.

Is it really worth it for sound alone?

[jasongtr]

for me i couldnt care less about the power, why are so many obsessed with power, if i want to go really fast id buy a better car that handles a damn site better than an RS4

besides when mine is single turbo'd it will be quick anyway

love the fact all anyone comes back with is it wont be a fast.....

[AudiSport12]

B5 A4 -> 4.2 = Badass
B5 S4 -> 4.2 = Annoys people

[jasongtr]

haha, so an A4 with a 4.2 is better than an S4 with one - you crazy Americans make me laugh

[AudiSport12]

I was not implying that an A4 is better than a S4 with a 4.2. I was simply saying that people think a V8 swapped A4 is 'badass.' If someone talks about putting a V8 in an S4, people go nuts. I don't understand that logic.

[b5jimbo]

I had a feeling this would bother the s4 section, also posted in a4 section and was actually given answers. The way I looked at it, I have an engine with 250k so how much longer does it have, even the frankenturbo kit is 1800$, and then tuning, injectors.. etc I'll spend way less rebuilding the 4.2 and in the end have a reliable 300hp (which is fast enough for me) , that sounds amazing and is very unique.

[b5jimbo]

C5 is a belt yes, but I just don't see the appeal of the swap. All that work for less power than a tuned k03 2.7.

Is it really worth it for sound alone?

Not just the sound, I plan on rebuilding it while it's out, so that way it'll be reliable too, also going to cost me less than going stage 3. Also the wow factor of swapping a v8 into a b5 don't tell me it's not badass.

[jasongtr]

I was not implying that an A4 is better than a S4 with a 4.2. I was simply saying that people think a V8 swapped A4 is 'badass.' If someone talks about putting a V8 in an S4, people go nuts. I don't understand that logic.

ah ok i misunderstood, maybe as i have heard so many people moaning about me doing it to a genuine B5 RS4

[JJ.]

I wonder if there's a way to do this swap and make it reverse able for when I want some turbo power again.

[jasongtr]

yeah, take the 4.2 out and put the 2.7 back in

[DieselElectric]

, why are so many obsessed with power.

*Snip*

love the fact all anyone comes back with is it wont be a fast.....

Because horsepower = <3

[jasongtr]

who cares

[88ninety9]

ah ok i misunderstood, maybe as i have heard so many people moaning about me doing it to a genuine B5 RS4

Well the rs4 isn't available here, so there's that.....
Maybe you'll get more love in the v8 forums?

[jasongtr]

im not after any love from anyone, my car will come back on the road 120 hp lower than it was, i still dont care

[88ninety9]

That wasn't necessarily the point I was making.

And yes you are, or you wouldn't have a build thread on a public forum

[jasongtr]

let everyone say how ridiculous the car will be for whatever reason , im building it for myself not anyones approval or love, just like alot of people im sharing what is happening as people may be interested in it, not to seek their love.

If that is the general opinion of people on this forum ill refrain from posting anymore - or maybe its just your narrow minded view

[88ninety9]

I never said anything about it being rediculous, I quite approve of swaps. However, you post in an online forum and expect nobody to post their opinion.

The point I was making is that you're posting in an AMERICAN based forum about an unobtainable unicorn. Of course the approval rating would be low.

As far as being narrow minded, I think you ought to look into the mirror. You've done nothing but whine and kick your feet about any comment not condoning your swap. Have a nice day


@jimbo wonder if instead of retuning the ecu, if a b6 s4 ecu would work without having to modify?

[DieselElectric]

I'll say it, removing an AZR to install a N/A 4.2 v8 with less horsepower than the stock TT V6, is ridiculous.

It really is, you're taking a 380hp stock engine with huge proven capability, and swapping in an inferior engine that will take gobs of work to perform even close.

If you don't care about horsepower, then why did you buy an RS4 in the first place?

Sure, it will be unique, doesn't mean it's good.

Sorry, not sorry.

[jasongtr]

wow, friendly bunch in here arent you

i bought an RS4 because i could, i love the way they look and couldnt care if it had a 1.8t 20v in it, everyone is so precious about the horsepower, i could not care less about the power

ill leave it here and never post again in this forum - jeez how to make someone feel welcome

[DieselElectric]

It's your car so you're obviously free to do as you please. Just because I don't like the idea doesn't mean others won't.

[AudiSport12]

Jason, please take note you are in the B5 S4 forum. Here, they'll 'rip your f*cking head off!" if you do something out of the norm.

No worries. Keep doing what you're doing and let's allow B5jimbo to continue his thread, lol.

Jimbo, ECU coding shouldn't be too difficult. There are several guys in the A4 forum who have done this with no issue. Take your questions there as they are a helpful bunch. User Nollywood has done several 4.2 swaps and knows his stuff.

[jasongtr]

Jason, please take note you are in the B5 S4 forum. Here, they'll 'rip your f*cking head off!" if you do something out of the norm.

No worries. Keep doing what you're doing and let's allow B5jimbo to continue his thread, lol.
.

out of the norm - what like a single turbo idea - thats not normal for a bi turbo, but a great idea

not wishing to upset the OP and his thread (clearly i was the first to give support for that) ill bow out of this conversation

[-Billy]

, i love the way they look and couldnt care if it had a 1.8t 20v in it

That would be a much better choice. They are proven to reliably hold a ton of horsepower. I regret not building a 1.8t instead of my built 2.7/single turbo.

[jasongtr]

i dont care about the power

[-Billy]

We've heard you say that already, multiple times. You've also stated multiple times that you are leaving this thread and this forum, but that has not happened. You'll understand if I don't believe you then...Even my 3 year old cares about power.

[jasongtr]

Billy you are a twat

[getslideways]

Out of the 30 previous posts, JasonGTR has 12 (40%). We get it, you like the V8, and feel some others don't, point taken, but jesus man, let the OP have his thread back lol

The sound of a 4.2 with open headers is awesome in its own way (chain drive variant):



However if you are looking to do a 4.2 because it seems "cheaper", I would re-run the numbers as swaps of any kind nickel and dime you to do them right. If you want the V8 because you just want a V8 , then have at, if you are doing it because you think it will be "cheaper" you might want to reconsider. Just my 2 cents. Best of luck with your build

***Edit** In the time I was writing this it went to 42% (14 out of 33 posts)

[b5jimbo]

Jason, please take note you are in the B5 S4 forum. Here, they'll 'rip your f*cking head off!" if you do something out of the norm.

No worries. Keep doing what you're doing and let's allow B5jimbo to continue his thread, lol.

Jimbo, ECU coding shouldn't be too difficult. There are several guys in the A4 forum who have done this with no issue. Take your questions there as they are a helpful bunch. User Nollywood has done several 4.2 swaps and knows his stuff.

Yeah I've already posted in the a4 tech section and no fighting lol just one guy with all the answers I was looking for. Not sure how the thread got so messed up but I'm definitely going ahead with the swap regardless of anyone's opinions.

[b5jimbo]

Out of the 30 previous posts, JasonGTR has 12 (40%). We get it, you like the V8, and feel some others don't, point taken, but jesus man, let the OP have his thread back lol

The sound of a 4.2 with open headers is awesome in its own way (chain drive variant):



However if you are looking to do a 4.2 because it seems "cheaper", I would re-run the numbers as swaps of any kind nickel and dime you to do them right. If you want the V8 because you just want a V8 , then have at, if you are doing it because you think it will be "cheaper" you might want to reconsider. Just my 2 cents. Best of luck with your build

***Edit** In the time I was writing this it went to 42% (14 out of 33 posts)

Well the way I look at it with 250k on my apb I'd want to rebuild it, like new gaskets, seals, rings, then I'd still need 2k worth in turbo parts etc etc. So I'll probably end up saving some money but not the real reason for the swap, I just want a V8 in my audi that is the main reason.

[b5jimbo]

Billy you are a twat

Do you man, it's your car, put a tdi in there if you feel like it. But you definitely can't go wrong with a v8.

[AudiSport12]

C5 RS6 4.2

[DieselElectric]

C5 RS6 4.2

Now we're talking

[hibiscusS4]

i think the problem here is putting something na into an s4 lol
im all over a twin and or single turbo 4.2L