Hi all,
recent new owner and wondered if anybody has had their hummer converted to lpg? and to what set up they have? for example tank size/position etc.

Thanks,

Richard

 

Just curious, why are you looking into this?

I ask because I've heard nothing but negative things about LPG conversions as they are overall lacking in power. I believe CNG solutions suffer the same issue. I think driving the H2 with would be an absolute hell & make you hate the vehicle or any vehicle. My g/f took a driving test using a CNG powered Honda & said the instructor kept telling her to increase her speed to merge on an interstate; she had to the the instructor that she was literally flooring the pedal & the car had nothing left to give. CNG/LPG are gutless wonders. The 03-07 have, at most, 325hp. My 09 has 393 HP & it's night and day. I think 450hp+ would be more ideal, plus more torque. Going in the opposite direction should really save fuel as you're running higher RPMs due to lack of power.

If you don't have a station near you, you're SOL unless you bring a spare tank. There's one in my State; just one & it's by the airport. I'd be scared to drive something with fuel that's difficult to get. I realize a lot of these conversions allow for fuel switching, but what's the point? Unless it's 50/50 or better fuel usage, I don't see a real purpose in spending that kind of cash.

I came across this thread, albeit, the info is old out & out date (wow, almost 10 years!):
PROPANE CONVERSION H2 - Hummer Forums by Elcova

The link gives some interesting opinions & it seems more Canadians are into the conversions.
I thought about doing it, but it didn't seem to be more cost effective, if not more expensive than converting to a Duramax and producing biodiesel. Obviously, biodiesel isn't an option for everyone, but it is cheaper if you can & if you drive a great distance, you can always fill up using normal diesel & not fear a major reduction in power.

 

Hi there Richard,

I believe I can help you with this. I had my Hummer H2 converted to LPG mainly due to gas prices here (Poland) and LPG is a common thing. The fuel tank I have is 70 liters but you need to know that the capacity is limited by about 10-20% due to safety reasons so when I fill up it only goes up to about 56 liters. I know thats not much but I went with a smaller tank because I mainly drive around the city and it doesnt take up that much space in the trunk.

My H2 takes about 25 liters of regular fuel around the city and about 27-28 liters of LPG gas. LPG gas stations are as common as regular ones in Poland not sure hows it like at your place. I didnt want the tank mounted below the trunk as the clearance suffers badly. The installation costs about 1500$ here in PL but the fuel costs 0.50$ per liter and regular fuel is like 1.3$ a liter. If you have any questions feel free to PM me or just continue this topic. Best installations are made by BRC and PRINS.

Cheers and best wishes from Poland

 

Here in the UK LPG is about half price and equates to roughly around 27MPG (US Gallons that is ) which is better than 12MPG on petrol (word gas gets confusing here)

As for power can't really say I've noticed much difference, anyway switching back and forth is just the touch of a button.

My LPG tank is mounted inside the trunk on the LHS (where the spare would be, quite a common solution), it fills to 65 Liters providing a range of about 140 miles. Some people replace the fuel tank with a 25 Liter petrol tank filling the remaining space with LPG (100 Liters if I recall correctly)

Could not afford to drive here in UK on petrol.

 

That's interesting to hear.
I've read so often than CNG is a dog. Maybe LPG provides more energy upon combustion? I haven't really looked into that.

I wish OP would state where he is. In the US, I'm not sure it's worth it. Other places, especially EU & Australia, I can see it being easily worth the conversion, especially if there's a access to it.

 

Couldn't have said it better, I have worked for companies that offer CNG & LPG powered units - In there CNG & LPG form they are gutless and make almost 1/2 the horsepower of the gas version, also in these fuels they consume double over the gas version.

 

Last week there was the American Speedfest car show held at Brands Hatch racing circuit near London. Four of us with H2's attended, all had LPG conversions and low power was not a topic raised by anyone.

Incidentally I still have my 32 Gallon tank, just means my spare wheel is permanently mounted on the outside.

 

Where did you get your LPG conversion done and would you have done anything differently

 

@lighthousedesign

The previous owner installed the LPG so I was not involved, however regarding the LPG tank I understand there are 2-port tanks and 4-port tanks, the latter is much faster to fill. Mine is a 100 litre 2-port tank and takes ages to fill-up, maybe 10 minutes.

The other point is LPG in the UK now costs more, typically £1 litre whereas petroleum is £1.35, so the saving is about 15%, it's also getting scarce.

 

According to my math you would need a 120lb tank to hold 100 litre LPG. Where is this tank mounted? Got a pic?