Diesel Alternative Engines..... Read before asking questions
Posted: 13 Oct 2005, 09:35
VW are renowned for their diesels and those fitted as standard to the T25 do not do it justice. What can you replace them with to getting better power and economy ?
1.9NA
If you're going from a 1.6 then this will give slightly improved economy and power and increased longevity…. Just not much !
1.9TD
The key engine here is the AAZ " this has been fitted to a wide range of VAG vehicles and is a good solid engine, with a nice fat torque curve. Like the 1.9NA it's possible to use mostly stock T25 fitting kits, you may need to trim the engine mounting bars to make the turbo fit when it's between cylinder 2 & 3. These engines are tough units, but may have done a lot of miles, so make sure there aren't head gasket problems, or worn valve stem seals when buying.
1.9TDI
There are a bewildering array of VW 1.9TDI engines, from 90bhp upwards to 150bhp. Early units are basic electronic TDI, later make even greater use of electronics for smoother running and economy. If you are going electronic be aware that if the donor is 96 onwards you will need to have the ECU from that engine and ignition key, barrel and clocks, or have got the integrated security 'burnt out' of the ECU. Later ones (PD or Pumpe Duse) are said to have changed engine mounting bolt holes that may need new mounts to be fabricated and all TDIs will need a beefier clutch than the standard T25 diesel one.
Who can I get to do the work ?
Known converters include: Russel at Syncronutz, Simon Baxter aka Mr Brickyard and Central VW-Audi on the Wirral
Audi 5Cylinder engines
Yes it's possible, but as with the 5 cylinder petrol it's a lot of Work. Russel at Syncronutz has implemented this conversion, but has since gone 1.9TDI.
PSA diesels " life's complicated enough, there's a wide range of VW engines, but if you MUST here are some words from another member who's recently made this conversion: 'I got a kit from a guy called Phil Thompson 07703844035-cost £230. But fitting isn't that straightforward... You need huge amounts of time and patience to fit, then remove, modify and refit everything about a dozen times to get it right.'
1.9NA
If you're going from a 1.6 then this will give slightly improved economy and power and increased longevity…. Just not much !
1.9TD
The key engine here is the AAZ " this has been fitted to a wide range of VAG vehicles and is a good solid engine, with a nice fat torque curve. Like the 1.9NA it's possible to use mostly stock T25 fitting kits, you may need to trim the engine mounting bars to make the turbo fit when it's between cylinder 2 & 3. These engines are tough units, but may have done a lot of miles, so make sure there aren't head gasket problems, or worn valve stem seals when buying.
1.9TDI
There are a bewildering array of VW 1.9TDI engines, from 90bhp upwards to 150bhp. Early units are basic electronic TDI, later make even greater use of electronics for smoother running and economy. If you are going electronic be aware that if the donor is 96 onwards you will need to have the ECU from that engine and ignition key, barrel and clocks, or have got the integrated security 'burnt out' of the ECU. Later ones (PD or Pumpe Duse) are said to have changed engine mounting bolt holes that may need new mounts to be fabricated and all TDIs will need a beefier clutch than the standard T25 diesel one.
Who can I get to do the work ?
Known converters include: Russel at Syncronutz, Simon Baxter aka Mr Brickyard and Central VW-Audi on the Wirral
Audi 5Cylinder engines
Yes it's possible, but as with the 5 cylinder petrol it's a lot of Work. Russel at Syncronutz has implemented this conversion, but has since gone 1.9TDI.
PSA diesels " life's complicated enough, there's a wide range of VW engines, but if you MUST here are some words from another member who's recently made this conversion: 'I got a kit from a guy called Phil Thompson 07703844035-cost £230. But fitting isn't that straightforward... You need huge amounts of time and patience to fit, then remove, modify and refit everything about a dozen times to get it right.'