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View Full Version : B8 FWD A4 to AWD S4 full mechanical conversion.



Nilesh572
02-06-2021, 09:11 PM
Hello to my fellow Audizine members,
I decided to post up on what I believe is one of few audi A4's that have been fully converted to an audi s4.
Before you ask "why not just buy an S4"-
There is not a single S4 in my country.
In my country we are not allowed to import cars that are more than 3 years old.
We do have many 1.8t A4's running around though.
Therefore my only option was to try and build my own s4.

How -
We bought a high mileage A4 that had a slight Fender bender.
I tried looking online to see if a fwd a4 could be converted to quattro with no major surgery but found no definitive answer.
Taking a leap of faith I purchased a manual 2011 audi s4 in the UK and shipped every single part,nut and bolt back to my country.
The a4 was stripped to its bare shell.
And what do you know, nothing had to be modified.
All the s4 gear just bolts on.
Quattro rear frame and all.
The car is now painted and in its final stage of assembly before it hits the road.

I will update the thread as we dive into doing the supercharger pulley and remap.
Thank you for reading!

Akim25
02-06-2021, 09:18 PM
Following, very excited to see the journey !


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Nilesh572
02-06-2021, 09:21 PM
https://uploads.tapatalk-cdn.com/20210207/063b5a67c0a8821889b5b036a6e1d1e6.jpg
Here she is with the engine and running gear in.
Also painted classic nardo grey!


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Nilesh572
02-06-2021, 09:33 PM
Following, very excited to see the journey !


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Thank you! I believe this is the first documented swap of this kind.


https://uploads.tapatalk-cdn.com/20210207/a4353b68f058104c3d33d9ef5a45ad39.jpg

Dashboard and complete wiring harness from the donor s4 is in.
Also the a4 we started with was a base spec with next to no options.
We have successfully retrofitted the Bang & Olufsen system that came in the S4 as well.

A CTS 192 pulley and uprated heat exchanger are on the way.

The car has been decatted and a custom twin 3" exhaust is underway as well.

Video of the first startup soon !


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hunter_killer
02-07-2021, 05:48 AM
Wow that’s a lot of work and dedication! Keep it up this a cool project!


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jdfelda
02-07-2021, 08:05 AM
As they say: where there’s a will there’s a way. Very cool project, looking forward to updates.

Nilesh572
02-08-2021, 07:04 AM
Thank you all !
https://youtu.be/CpPaSmczWDY

And she is alive ! What a feeling! All the belts were undone because this is the first time this motor has started in months.
Also it's pretty loud because the cats are out and there's nothing back from the headers.
The rest will now be going back together.
Been debating on a set of coilovers and thinking of picking up a set of ST XA s, any feed back?


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