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4.6is - decided to LPG convert

Discuss your latest mods or ideas, and anything to do with the BMW X5 (E53).
JimmySpeed
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Re: 4.6is - decided to LPG convert

Post by JimmySpeed » Fri Mar 22, 2013 9:55 pm

Mine is hidden behind a discreet flat flap in the plastic bit of the rear bumper right next to the tow bar cover. Its flush with the plastic so its pretty much invisible.

When you open the flap you just see a threaded hole, I then screw the nozzle into it for a fill up. When done, unscrew and close flap.

My 4.4. had a normal UK filler in the side of the bumper with the screw on cap etc (the 'norm' that you see). It was easier to at fill time as it was near my petrol filler, but not hidden. On my 4.6is no one can tell I'm a cheap git who refuses to run it of 'proper' fuel  :)) :)) :))

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Re: 4.6is - decided to LPG convert

Post by Raj » Sat Mar 23, 2013 12:15 am

Nice write up Dave. I visited the guys at Hilton on Wednesday and had a good chat about the Prins system and look over the X5.

Its a good bit dearer than the one you have mentioned Dave but I do feel the Prins system to be one of the best from all the countless searches and threads etc on the interweb.

They did say that a slightly bigger tank can be fitted if you have the retractable load floor but not a huge amount bigger tbh. Also there is no issue with hiding the fuel filler out of site. I really don't like the bumper cap in the side jobbies as I want it totally discreet. I've already chatted to the guys about where I want it locating and all seems good.

I'm all booked in but just waiting on a call to see if they might be able to get it in earlier.
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storminmike
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Re: 4.6is - decided to LPG convert

Post by storminmike » Sat Mar 23, 2013 7:33 pm

Stupid question,,,,can you run diesels on LPG?

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Don Coffey
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Re: 4.6is - decided to LPG convert

Post by Don Coffey » Sat Mar 23, 2013 7:40 pm

[quote="storminmike"]
Stupid question,,,,can you run diesels on LPG?
[/quote]
I did ask this question some years ago, I was told it is possible but unlike petrol, diesel conversions still require an amount of diesel to be used at the same time.  No idea what the ratio is or how economical either.

Don
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JimmySpeed
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Re: 4.6is - decided to LPG convert

Post by JimmySpeed » Sat Mar 23, 2013 8:53 pm

[quote="Don Coffey"]
[quote="storminmike"]
Stupid question,,,,can you run diesels on LPG?
[/quote]
I did ask this question some years ago, I was told it is possible but unlike petrol, diesel conversions still require an amount of diesel to be used at the same time.  No idea what the ratio is or how economical either.

Don
[/quote]

Apparently its not a 'viable option' for normal folk with normal diesels - viable being the operative word.

These guys do offer it though

http://www.crdperformance.com/lpg/lpg-c ... -vehicles/

storminmike
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Re: 4.6is - decided to LPG convert

Post by storminmike » Sun Mar 24, 2013 2:13 pm

[quote="mobilejo"]
[quote="Don Coffey"]
[quote="storminmike"]
Stupid question,,,,can you run diesels on LPG?
[/quote]
I did ask this question some years ago, I was told it is possible but unlike petrol, diesel conversions still require an amount of diesel to be used at the same time.  No idea what the ratio is or how economical either.

Don
[/quote]





Apparently its not a 'viable option' for normal folk with normal diesels - viable being the operative word.

These guys do offer it though

http://www.crdperformance.com/lpg/lpg-c ... -vehicles/
[/quote]

The words I read were "Diesel Blend".  I guess we're not looking at 40% (or thearabouts) fuel cost savings so the savings might be even harder to recoup.

Had to ask though....good find 8)

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Re: 4.6is - decided to LPG convert

Post by Geezer » Tue Mar 26, 2013 5:30 pm

Right I’ve been driving my LPG converted 4.6 for almost 3 weeks now and have covered over 600 miles.

Overall impressions are fantastic! I just wish the tank was bigger, but that isn’t possible without loosing any boot space.

I had the AEB King system installed by Nationwide LPG based in Walsall near Birmingham. The system cost £1500 to install and the work took 3 days for the LPG installation, but then another couple of days an additional £350 as I had the rocker cover gaskets changed and a full service done. I received a discount on the cost of the service as the engine was already being worked on and paid mainly for parts.

I had the indicator fitted on the ‘lip’ at the bottom of the dash, just above the accelerator. This has five LED lights at the top to indicate the fuel level and two at the bottom, one to indicate it is running on Petrol and the other to indicate it is running on LPG. There is a button in the middle of the gauge which if pressed switches between LPG and petrol.

The engine starts up on petrol and switches over to LPG after about 2 min. The transition is very smooth and I cannot notice it at all without looking at the gauge. The filler is hidden under the tow bar cover, so no unsightly caps on the bumper.

The installer, Abdul Muhit, was very knowledgeable and said he was happy to drive the ‘X’ around for a week to ensure there were no problems. He was also very thorough when showing me around the car, opening the engine cover to show his handy work, which I admit was very neat (I’ll upload some pictures soon). He has been in the business for over 12 years, his personal car was an M5 he had converted himself. When I went to pick up the X, he had just bought himself a Mercedes C55 AMG which he had just converted.


The tank holds 77 litres of LPG and this lasts me about 200miles of spirited driving. I’ve found the cost of LPG to vary quite a bit, with the cheapest being 63p a litre in Birmingham (61p if you buy a pre-paid tag) to 72-78p per litre in London.

As part of the installation, he had to move the air pump to make space for the tank. This now makes an audible noise on start up only. I’m told this can be insulated, but to be hoes the noise doesn’t bother me.

All in, I’m very happy with the installation, It takes full throttle no problem and is a dream to drive.

As stated above, it’d be nice to have a bigger tank as I do a fair amount of mileage. It would also be nice to have Birmingham priced LPG in London.

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