27-06-2015, 05:47 AM
Only just seen this thread so will have my say, writing from my phone though so bear with me!
M-tdi is the best of both worlds for the average home tuner, you get the ease of tuning adjustments from the rotary VE pump, and all the benefits of a DI motor, its been 3 years I think since I took my DT off the road , and I still miss it , mainly down to its engine, even if I wasn't ever opened up to extremes at that point.
As people have said, the most critical parts of these conversions are the pump and injectors...the pump, is very simple to sort out, and with some experience / experimentation can very easily be set up to work very well and cost very little.
The injectors are where things become a little more tricky, however if you have a pop tester, and some experience, can also be sorted out very easily.
The main reason I originally used the 16v engine was due to injectors, its flat plane, and there are literally thousands of injectors out there in stock form with suitable nozzles for making good or big power, finding bodies is also cheap and easy with some research.
The 8v however although finding injectors to physically fit is a piece of cake (easier than 16v), getting the cone angle and rotation correct is much harder, due to the awkward injector angle on the 8v. However there are options out there, but to make big power would require stock nozzles being honed by an experienced diesel shop, as finding big nozzles for more than 150-160hp is impossible...
Overall its all possible fairly easily, but as with everything if your doing it all yourself, it will require some time and money getting all the right parts together.
M-tdi is the best of both worlds for the average home tuner, you get the ease of tuning adjustments from the rotary VE pump, and all the benefits of a DI motor, its been 3 years I think since I took my DT off the road , and I still miss it , mainly down to its engine, even if I wasn't ever opened up to extremes at that point.
As people have said, the most critical parts of these conversions are the pump and injectors...the pump, is very simple to sort out, and with some experience / experimentation can very easily be set up to work very well and cost very little.
The injectors are where things become a little more tricky, however if you have a pop tester, and some experience, can also be sorted out very easily.
The main reason I originally used the 16v engine was due to injectors, its flat plane, and there are literally thousands of injectors out there in stock form with suitable nozzles for making good or big power, finding bodies is also cheap and easy with some research.
The 8v however although finding injectors to physically fit is a piece of cake (easier than 16v), getting the cone angle and rotation correct is much harder, due to the awkward injector angle on the 8v. However there are options out there, but to make big power would require stock nozzles being honed by an experienced diesel shop, as finding big nozzles for more than 150-160hp is impossible...
Overall its all possible fairly easily, but as with everything if your doing it all yourself, it will require some time and money getting all the right parts together.
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