My xb i converted it to run on propane and gas. I'm going to hook up the air ride again
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25 miles to the gallon is what im getting on lpg. spark plugs are 1 heat range hotter. there is a fuel gauge in the car for the lp. bypassed it cause forklift tank senders are expensive. to bypass it i used a pressure switch and a 90 ohm resistor. It tricks the computer to think it has a gauge, when the pressure drops cause the tank is empty the switch closes and it switches back over to gas. you can hardly tell when it switches. you can though the engine changes its tone a bit. the vapor pressure is about 17 psi if i got the conversion right. The valves are stock, and since i drive like a grandma they will probably be fine. Right now its set to switch back to gas when the rpm is at 3,000 So once i hit 80 mph on the highway it goes back to gas. I found with forklifts that have valve guides go bad are mostly ones that are hammered on, high rev and no governor. running the cermalube through my gas tank should have coated my valves with ceramic, i hope. but i also have lpg valve lube. Its a slow drip into the intake manifold. thats what they use in europe for lpg and cng.Propane burns cleaner than gasoline, and Compressed Natural Gas (CNG) burns even cleaner. Clean enough to qualify for a HOV lane sticker and access in California. Both fuels provide less miles per tankful than the equivalent gasoline due to less energy produced. But offset by the cheap price of fuel, they are a cost savings. Usually $.35 to $.50 cheaper per gallon equivalent. Also, the federal government gave a $.50 per gallon tax credit to encourage using alternate fuels, but that probably has expired. Takes a few years to recoup the investment.
CNG is definitely safer than gasoline: evaporates quickly; does not pool on the ground if leaked; has to meet a specific range of combustion before it will ignite; and is non-toxic. Maxes out with about 4,200 PSI in the tank on a hot day, versus about 300 PSI for Propane. Around five below zero a block heater is appreciated.
96 percent of the natural gas used in the USA is produced here from Methane. Also is renewable as it is produced by landfill dumps. Both fuels have a limited number of available stations; but those are increasing.
The xB converted to propane fuel is impressive. Looking forward to the details.
They can have issues burning out valvesHave to say that your knowledge of LP systems helps !! My neighbor years ago had an old checker car that ran on both LP and gas !! To my knowledge he never had issues with the engine !!!
I will keep you posted on how my valves are in a year or so. I guess were going to find out how hard the valves and seats are in a 1nzfe engine If i mess up the valves, then a whole new topic to rebuild a head will get generatedI do not know about Propane, only about CNG. Due to the reduced lubricity of natural gas the intake and exhaust valves can wear out much faster than when using gasoline. Engines which normally could go a service life of 160,000 miles without grinding or replacing valves, were wearing out at 75,000 to 100,000 miles and at eight years old. The valves and the seats were wearing out quickly; the rest of the engine was fine. Obviously, the amount of engine run time is an important wear factor as is idling time.
Any conversion should include the hardened valves, like comes on an OEM version for CNG vehicles.
Just like in the early 1970's when lead was removed from gasoline and lots of engines wore out the valves prematurely. Finally, the OEM's put in hardened valves. Those valves still were not strong enough for the CNG versions.
Hoping to get details about the Propane conversion xB. From the original post, it appears to be bi-fuel, which has a whole other set of challenges, particularity the engine electronic parameters so different from gasoline.
burns clean gas miles is only 25 mpgHella gas mileage and burns cleaner
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Im at 194,500 or so . Ive been thinking about buying a spare engine. 300k really? I bought my box at like 120k only simple problems so far. starter, battery,and brakes so far. it wouldnt hurt to have an extra engine , just cause i might scatter this one running on lp LOLSounds like an interesting concept. We know our engines can last 300k plus on gasoline. How long on LP or CNG?
I might sound strange but i think that a Lp tank is alot safer than a gas tank. they are more rigid and can withstand a much greater impact than your gas tank in anyones car the pros of the propane is just that the fuel burns cleaner and its 2.30 gal at tractor supply . I should be only running on hd5 propane, but honetly its just for bragging rights. i needed a project to work onFirst time I have seen this, what are the pros of having propane ran to your engine, I know the cons are, "kaboom" .....lol
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The car has the stock manifold,and the catalist. i have no idea about incentives. Im afraid to tell any offical about it. it's probably not street legal. The tank has 2 vents outside the car. one is tank pressure relief, and the other is line pressure relief. none of the oem parts are removed at all. 25mpg. the high pressure filter is inside the nortic reducer. the nortic reducer uses the heater core hose to convert to vapor. my propane tank is mounted to my back seat, welded brackets in the trunk area.Welcome to the site. That is a fascinating dual fuel conversion. Lots of curiosity and questions about it:
Single or dual intake manifold for the propane injectors and gasoline injectors?
What amount pressure for the propane fuel injectors and lines used?
Is the boosted pressure regulation for the propane injectors separate or in the ECM?
What size propane tank and where does it mount?
If the tank is inside, how is it shielded and how does the pressure safety valve vent to the outside of the xB?
Did the PCM programming come with a kit and loading device for the CAN connector, or did it have to be made custom?
Were the engine intake and exhaust valves switched to ones requiring less lubricity?
Where does the filler neck and port mount?
What programming converts the gas vapor to a liquid equivalent for the fuel gauge reading?
Where does the high pressure propane filter mount?
Is the OEM catalytic convertor removed?
Is the vapor recovery for gasoline removed?
What distance driving range on a tank of propane?
What heat range spark plugs used?
Any state or federal tax credit, or incentives, for the conversion?
Always wondered about this conversion for an xB. Please post pictures of the conversion process and equipment needed. Thanks in advance.
Im not sure that i ever seen a xb running on lpg . Thats why I did it its very hard to get any info about converting one and i think i might be one of the first !>Welcome to da club !!! Never seen this in an XB yet but I hear they burn cleaner !!!!