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Engine, Video

1.8T 20V Turbo Swap

It has been a very long time since I updated the blog, so long so that I forgot the password!

Anyway, after years of driving the 924 S as hard and fast as I could I figured I either needed to change the car, or add a little more power. I decided to go for the latter. I had heard that some modern VW engines still had the same bellhousing bolt pattern and engine mount points, this led me to the 1.8T 20V engine from a bunch of cars – you’d probably know it best from the Mk1 Audi TT, albeit in a slightly different variant – it needs the less powerful engine from the Passat / A4 / A6, because it’s longitudinal, rather than transverse. The tuning options for these engines is plentiful, as well.

When I started digging, a few people have done this project already, it turned up the following:

  • The bellhousing is different
  • The engine mounts are different
  • The starter motor doesn’t fit the transmission tunnel
  • The sump won’t clear the crossmember

And all of the above is before looking at all of the things that the turbo engine needs, and the issue of patching in the electrics.

I decided I wanted to do it all anyway and managed to get a good deal on an engine to get me started. I cleaned up the engine and then replaced all of the service parts. After that, things began in earnest, back in November 2018. I’ve been making steady progress – it has been a learning experience – and as part of that I’ve been filming the progress. Below is the first video in the series, and don’t worry, if you’re interested in following, the video quality improves as I go along!

If you want to see more videos as they’re released click through to YouTube and subscribe! Between the above, and GT Porsche magazine I’ve kind of let this slide, but keep the site going in case anyone find it useful!

The PawnSacrifice YouTube channel.


5 thoughts on “1.8T 20V Turbo Swap

  1. Great to see this still going Matt. I will be watching, love this type of thing.

    Posted by Steve Hutchison | March 24, 2019, 11:40 am
  2. Hi Matt! Good to see you and your 924 are still going on!! As I own exactly the same car .. of course I would also like to have more horsepower … 😉 Why did you go for a non-porsche engine .. 😦 I have seen some pretty nice swaps with the fantastic 968 engine … !?
    Another thing .. be careful with the position of the car-stand in front!! this position is prone to collapse!! The official position is just a bit towards the middle – marked with a little triangle.
    Would love to see also the work you have done to the suspension .. as we are doing more or less the same with our cars … ;-))
    Good luck and greets from Bergamo, italy


    Posted by Baumann Christian | March 27, 2019, 9:52 am
    • Thanks Christian! 968 engine would cost more than the entire project! Non-Porsche engine, 4 cylinder Audi engine in a 924… this way I get to play with something different, get more power options as I want to go faster, and it’s about 45kgs lighter than the original 924 engine.

      Suspension wise, SPAX adjustable coilovers all round, with 968 ARBs front and rear… not sure if that will be tweaked when this is done… sure there will be a proper update at some point.

      Good luck with yours!

      Posted by Matt Biggs | March 30, 2019, 10:07 pm
  3. Hi Matt, Hows the engine swap progressing? I going to be starting the same project on my S in the next couple of months with a K04-064 to get that Passat engine on the way to producing decent power and have covered a fair bit of research to piece it all together. Have you looked into the gearbox as i wondering whether the 924S gearbox will cope with 280-300bhp, I had read that the Boxster 5 speed gearbox mates to a 944 transaxle and unlike the 944 Turbo and 968 boxes a huge amount cheaper. Thanks for all the effort you go to with the blogs and vlogs, superb quality and much appreciated.

    Posted by Jeremy Barker | September 6, 2019, 5:19 pm
    • I’ve not seen the Boxster option, before, but having a quick look it seems the 5speed 986 box is a the same as a Passat one, so not sure how much stronger that would be than the standard box. I’m going to look at a Turbo box which has a hardened first gear. With regard to costs, just bear in mind any additional costs such as Porsche input / outputs you might need to adapt the six speed box. Good luck with the project!

      Posted by Matt Biggs | September 7, 2019, 9:12 am

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