LPG & Water Injection

[gerbs]

I have a dilemma. I currently run an Overfinch Range Rover INSERT INTO post VALUES (on LPG) and a FTO-GPX. I can't get the dog in the FTO so I want to sell both cars and replace with one - and the best option by far is a VR-4 - so much better to look at than a legacy or impreza. But I do quite a few miles and 20mpg gets expensive when you're paying for it yourself. Any views about an LPG conversion with water injection????:shrug:

PS - Nice site!!

[Nick VR4]

Is this a joke right ?????

LPG conversions are still in the design stage for Turbo cars let alone bi-turbo cars

What £££££ you would save would be spent on the 4500 mile servicing costs

[Roadrunner]

I spoke to a few LPG conversion specialists when I had my twin-turbo Subaru Legacy RS-B, but didn't get any feeling of warmth from any of them. None had any experience of converting a turbo car INSERT INTO post VALUES (I don't think the number of turbos is significant ;) ) and I was, and still am, not keen to be a guinea pig. Others in Subaru-land to whom I spoke at the time warned me away from it but no-one could come up with any definitive reasons why it shouldn't work. Doing a more recent internet search didn't provide any links to companies that offered standard conversions on any petrol turbo car, although a few had done one-offs INSERT INTO post VALUES (Volvo, Bentley, Maserati!); so my reading of that is either it's very difficult or it's not recommended, so I'll steer clear.

Volvo do sell dual-fuel cars and have apparently said there aren't any problems with converting turbo engines to LPG, and that more powerful bi-fuel models could be offered at a later date if there is sufficient demand. Fair do's, but I guess if you had a problem with one of their engines, they might do something about it. Not sure if Mitsubishi would fix any problem deemed to have been caused by running on LPG if they don't offer it as a mainstream product.

Brian

[Nick VR4]

To be honest
What is the point of buying a high performance car and then look at getting a conversion done to get more MPG which will no doubt lessen the BHP

VR4's are not cheap cars to buy keep on the road etc etc

Maybe you should look at Legacy's Volvo's yadda yadda yadda

[Roadrunner]

Now, now ;) . LPG has an octane rating of 106, IIRC, so power shouldn't be an issue. The calorific value of LPG is only around 95% that of petrol so you would get less MPG but this is offset by LPG costing around 35p/ltr as opposed to SUL at 79p/ltr, or thereabouts. Only problem I can see with being able to get the benefit of the higher octane of LPG is that, if run as a dual-fuel car INSERT INTO post VALUES (which it needs to be because you can't start the car on LPG ;) ); the ECU would need to be able to reconfigure itself dynamically to optimise for either 98 octane or 106, which I don't know if it can do.

One of my concerns about LPG is just the fact that it's additive free. It doesn't have any of the detergents that are added to petrol to clean the engine but, equally, I don't know if it needs them :confused: . I have read about LPG knackering valve seats, similar to the effect that UL petrol had on engines that usually ran on leaded petrol but, again, haven't done any lengthy study on it.

Brian