Direct Injection - the end of LPG?

[classicswede]

AEB have been working on the VAG DI kits for a very long time, over 6 years that I am aware of and a lot of testing has been done. By now the product is pretty well proven. I suspect that VAG may well be factory fitting the AEB system?


The trouble with DI conversions in my opinion is that the running cost saving over a dirty derv is minimal if at all? I could be wrong.

What are the real world combined consuption results from these?


I would rather fit a proven kit the a test kit on one of these DI cars. If it was my own car I think it would end up gas only!

[rossko]

The trouble with DI conversions in my opinion is that the running cost saving over a dirty derv is minimal if at all?

That's true of any LPG conversion. It allows petrol performance at diesel prices.

[classicswede]

In a normal conversion you are beating diesel prices but with the DI I think you would only just about be matching.

[Tubbs]

It seems 5% of petrol is used from what i have seen. As dueltech says the lean burn di is better on fuel anyway.
Take a 1.8 audi a4. Combined 35.8 with a non fsi lump. The fsi turns out 49.6 so a big jump really.
So if you say a nicely tuned one will do between 7-10% less on gas. So lets say 44.6 ish. Then you have to minus the 5% of petrol usage. Someone clever with maths would need to work that out
Need to work out how much 2.23 miles of petrol is worth. I think it works out at 85p ? Might be wrong that

Anyway, once you take the cost of a new DPF into account and the fact that derv isnt really any cheaper i would hope its still cost effective to convert a di / fsi to LPG.

[Gilbertd]

Nah, cost has nothing to do with it, it's all about the power from a petrol engine.......

[classicswede]

That is not so bad. In early testing it was looking at around 20% petrol 80% LPG.

5% is hardly going to make much differnce to fuel costs to be fair.


I'm LPG all the way and hate putting any petrol in a car. If you can take the petrol tank off to remove the temptation all the better.