1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

A3 1.6 to 1.8 turbo conversion. Advice please...

Discussion in 'A3/S3 Forum (8L Chassis)' started by Fahd, Jan 30, 2011.

  1. Fahd
    Offline

    Fahd Member

    Joined:
    Jul 25, 2010
    Messages:
    38
    Likes Received:
    0
    Hi guys, I was hoping to get some advice on an A3 1.8 turbo conversion in an A3 1.6. I understand that most people would probably advise just trading the 1.6 in and buying a 1.8 but this particular car has a lot of value to me, it's absolutely immaculate and I know it's been very well looked after from new. To add to this, I'm able to buy a 1.8 turbo engine for pretty cheap and I wouldn't find the engine swap particularly hard assuming it's straight forward. Could anyone who's done this/ a similar project give me any advice? how much exactly will I need to swap out? obviously I'd need to fit the new engine with a turbo and mount and inter-cooler as but what else? new ECU? do the 1.6 exhaust headers fit the 1.8 engine or would I have to change the exhaust system too? what about the speedometer? (I'd like to keep my own unless absolutely necessary as they verify very low mileage). I'd appreciate any advice from those of you who know what you're talking about in regards to this. Thanks!
    #1
  2. TOM.S
    Offline

    TOM.S Member

    Joined:
    Sep 27, 2010
    Messages:
    375
    Likes Received:
    2
    Don't do it! its gonna cost more than buying a 1.8t.
    if however u decide to do it.
    ur gonna need : the engine (of course),ecu and other electrical stuff,gearbox ,upgrade on suspension(the 1.6 is a litle bit lighter and its suspension might not take the extra weight)upgrade the brakes(bigger discs,not sure about the pads) and more...
    I was thinking about the same thing a couple months back, but when i got trough the list of what everything i will ned to change/replace and aded up the cost... the decision was simple.... I bought a decent mileage X reg (newer/facelift model) 1.8T with leather interior,18 inch rs4 reps,scorpion exhaust already fitted,got it taxed,mot'd,serviced/fixed ... AND!!! still saved around £650 comparing to what would cost the conversion project.
    but in the end its your car,your decision to make.
    #2
  3. DJ_Troopa
    Offline

    DJ_Troopa K1 Driver

    Joined:
    Oct 30, 2008
    Messages:
    1,741
    Likes Received:
    0
    Sorry but.................... just buy a 1.8T :)
    #3
  4. bez101
    Online

    bez101 Yorkshire & Humber Rep. Regional Rep

    Joined:
    Jul 8, 2008
    Messages:
    8,680
    Likes Received:
    20
    hope you have deep pockets and loads of time
    #4
  5. Andrew@A.L.D
    Offline

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    If you could get everything cheap then i would say do it

    But as the prices of parts still high then i say don't bother and just buy a 1.8t
    #5
  6. jojo
    Online

    jojo S3 Drift King! Staff Member Moderator

    Joined:
    Sep 4, 2003
    Messages:
    25,919
    Likes Received:
    28
    If you are going to do it, drop an S3 1.8T along with twin intercoolers or go FMIC to make it worthwhile. If your intent is to go 1.8T 150bhp, then I would just buy a 1.8T, but if it's a conversion, might aswell go the whole hog and aim for 210/225 power, with the potential of 250+ with a remap.
    #6
  7. Dane
    Offline

    Dane Faster than a V12 Q7

    Joined:
    Nov 11, 2009
    Messages:
    4,005
    Likes Received:
    2
    Agreed
    #7
  8. Broken Byzan
    Offline

    Broken Byzan Photographic Moderator Staff Member Moderator

    Joined:
    Apr 26, 2004
    Messages:
    12,568
    Likes Received:
    9
    There are more differences that just the engine. The Box, shafts, uprights, front brakes and hubs. Then the engine, with turbo, manifolds, starter, alternator and all sensors. Intercooler and plumbing, water pipes/ Maybe fuel pipes and fuel pump i can't remember.

    Engine loom with ECU, also need a registered version of VAG com to code the immo.

    So sell the 1.6 and buy a 1.8t or enjoy the the cheap insurance and petrol of the 1.6
    #8
  9. Prawn
    Offline

    Prawn My other car is a MINI!!!!

    Joined:
    Dec 8, 2006
    Messages:
    9,438
    Likes Received:
    9
    you're going to need the complete engine, ECU, loom, and I think clocks too. You'll also need the full exhaust from turbo to tail pipe, front hubs, discs, calipers, carriers, driveshafts. I believe you'll also need the gear shifter and cables too as these look different on a 1.6.

    It's possible, but really what you need is a crash damaged 1.8T to take all the bits from
    #9
  10. Fahd
    Offline

    Fahd Member

    Joined:
    Jul 25, 2010
    Messages:
    38
    Likes Received:
    0
    Oh wow, that sucks. Pretty much every reply in this thread implies it's far more effort than it's worth. I guess I'll just have to keep the A3 1.6 lump in there for now as I really don't want to sell the car. Has anyone on here fitted a Rotrex Supercharger to their 1.6? supposedly they are good for an extra 65BHP and fitting would be a lot less complex than the work required for the 1.8 turbo conversion...

    YouTube - Audi A3 1.6 with rotrex supercharger 3

    YouTube - Audi A3 1.6 with rotrex supercharger 1

    YouTube - Audi A3 1.6 with rotrex supercharger 2
    Last edited: Jan 31, 2011
    #10
  11. Welly
    Offline

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    5
    I really like that. Fantastic S3 replica as well.
    #11

Share This Page