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96ghia
Fordmods - Getting Side Ways
Age:30
Posts: 800
Joined: 05 Nov 2004
Location: Wentworthville, Sydney NSW, Australia
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 Posted: Wed May 28, 2008 11:53 am Post subject: Duel Fuel - Petrol questions |
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Heya, I'll soon be getting converted to Gas, courtesy of my good mates at Crescent Motors, and have a few questions for other Duallies that might be on.
1. What Brand and type of Petrol do you use in your tank, for when you aren't on Gas, and how does it run?
2. How often would you run on Petrol , and for how long at a time?
3. How long would you go between Petrol fillups? (leaving the petrol stored in the tank)
4. Is there a difference in how long you can store for example regular Sheel 91, and Shell V-power? (Optimax)
Just simple questions, but hopefully someone has some answers!
cheers |
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howsie
Fordmods - Getting Side Ways
Age:23
Posts: 634
Joined: 11 Dec 2004
Location: penrith, sydney NSW, Australia
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| Posted: Wed May 28, 2008 6:14 pm Post subject: |
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ok it is recommended by many gas mechanics that you run your car on petrol in the following ratio.
3tanks gas to 1 tank petrol
Petrol i don't know but i don't think it matters.
storage time for petrol is basically the less the better for all types.
Having said all this my dad had a landau on duel fuel and would run the gas tank dry and then run on petrol to the nearest servo. Never had any problems. He just kept a quarter tank of fuel and every now and then ran the petrol out |
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ghia97
Fordmods - Getting Side Ways
Posts: 415
Joined: 31 Aug 2007
Location: Melbourne VIC, Australia
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| Posted: Wed May 28, 2008 7:24 pm Post subject: lpg |
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| I start on petrol and finish on petrol and run LPG the rest of the time. I will also switch to fuel for flat to floor acceleration needs. This usually uses 1/4 a tank to about 3 tanks of LPG. I always leave premium fuel in the tank and fill up when it gets down to 1/2 full. Three months is the most between filling and it havnt had a problem. |
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PoweredByCNG
Fordmods Oompa Loompa
Posts: 42
Joined: 18 Sep 2007
Location: Perth WA, Australia
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| Posted: Wed Jun 04, 2008 6:10 pm Post subject: |
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I would say running on petrol for one day per week is sufficient. With an SVI system, because the gas controller uses the petrol injection map to calculate gas injection, using 98RON petrol will improve performance.
Regards,
Dave |
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MICKYYYY
Fordmods - Getting Side Ways
Age:25
Posts: 874
Joined: 04 Sep 2006
Location: Sydney NSW, Australia
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| Posted: Wed Jun 04, 2008 6:26 pm Post subject: lpg |
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| I just start on petrol every morning for a few mins then flick it to gas and wait another min then start driving. |
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ghiawar
Fordmods - Smokin em up
Age:31
Posts: 255
Joined: 06 Nov 2004
Location: Surrey Downs SA, Australia
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| Posted: Thu Jun 05, 2008 12:42 am Post subject: |
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I was told to run it on petrol once a fortnight, for about 50 k's which is what I do.
I only fill my petrol tank on average once every two months or so, but since I dont use petrol all that often, I spend the bit extra and use the 98 octane.
Just dont let your tank get under 1/4 full or you risk pooping your fuel pump......it happened to me and was a bugger to get out. |
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krisisdog
Fordmods - Getting Side Ways
Age:19
Posts: 1902
Joined: 30 Oct 2006
Location: Grafton NSW, Australia
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| Posted: Thu Jun 05, 2008 12:50 am Post subject: |
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| ghiawar wrote: |
Just dont let your tank get under 1/4 full or you risk pooping your fuel pump......it happened to me and was a bugger to get out. |
Hows that work? |
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fairlane6970
Fordmods Oompa Loompa
Age:46
Posts: 43
Joined: 12 Apr 2008
Location: sydney NSW, Australia
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| Posted: Thu Jun 05, 2008 1:45 am Post subject: |
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Hey just had my NF 5.0 converted, this is my 3rd LPG Ford V8 - they love it, and the system automatically starts your car on petrol , then switches to gas, the mech told me i should run it every now and then on petrol to stop the injectors clogging up, but on my previous non-injected cars i just ran straight LPG because petrol was too expensive - with no problems.
the type of fuel is not important ( i too like premium) i say only keep about 1/4 tank petrol just in case otherwise you are dragging dead weight around.
happy gas motoring! |
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fairlane6970
Fordmods Oompa Loompa
Age:46
Posts: 43
Joined: 12 Apr 2008
Location: sydney NSW, Australia
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| Posted: Thu Jun 05, 2008 1:48 am Post subject: |
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| oh yeah my mech says thefuel pump apparently can run dry with too little fuel in petrol tank! which could "poop" your pump |
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96ghia
Fordmods - Getting Side Ways
Age:30
Posts: 800
Joined: 05 Nov 2004
Location: Wentworthville, Sydney NSW, Australia
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| Posted: Thu Jun 05, 2008 10:30 am Post subject: |
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| krisisdog wrote: | | ghiawar wrote: |
Just dont let your tank get under 1/4 full or you risk pooping your fuel pump......it happened to me and was a bugger to get out. |
Hows that work? |
Well it picks up all the dirt and muck that has settled on the bottom of the tank, all the time. The Fuel Filter stops it getting into the engine, but over time it can strain the pump, (makes it work harder) which burns it out quicker.
I've just had the Fuel Pump replaced recently, so I can't see this happening any time soon. The replaced pump was the factory original. Lasted 12 years  |
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96ghia
Fordmods - Getting Side Ways
Age:30
Posts: 800
Joined: 05 Nov 2004
Location: Wentworthville, Sydney NSW, Australia
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| Posted: Thu Jun 05, 2008 10:36 am Post subject: |
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| PoweredByCNG wrote: | I would say running on petrol for one day per week is sufficient. With an SVI system, because the gas controller uses the petrol injection map to calculate gas injection, using 98RON petrol will improve performance.
Regards,
Dave |
By the way, are you actually powered by Compressed Natural Gas??
I've seen Sydney Buses running on CNG, but no cars other than demonstrators... and no where to fill them up. I'm curious! |
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EF_fairmont_guy
Fordmods Parts Gopher
Posts: 71
Joined: 09 Apr 2005
Location: ------melburn------ VIC, Australia
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| Posted: Thu Jun 05, 2008 10:35 pm Post subject: |
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| yeah CNG is the go, you can buy pumps in the usa which you plumb in to your house straight to the gas main, pretty damn cool i reckon coz its soo f**k cheap! |
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96ghia
Fordmods - Getting Side Ways
Age:30
Posts: 800
Joined: 05 Nov 2004
Location: Wentworthville, Sydney NSW, Australia
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| Posted: Fri Jun 06, 2008 11:13 am Post subject: |
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| Hmmmmm! Well there you go.... |
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vrblou02
Fordmods - Getting Side Ways
Age:20
Posts: 553
Joined: 02 Apr 2007
Location: blue mountains NSW, Australia
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| Posted: Fri Jun 06, 2008 12:58 pm Post subject: |
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im curious about this cng
wats the go with it
can any1 explain a lil
cheers |
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relaxed_diplomacy
Fordmods - Getting Side Ways
Age:33
Posts: 939
Joined: 14 Dec 2007
Location: delegate NSW, Australia
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| Posted: Sun Jun 08, 2008 1:30 am Post subject: |
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| EF_fairmont_guy wrote: | | yeah CNG is the go, you can buy pumps in the usa which you plumb in to your house straight to the gas main, pretty damn cool i reckon coz its soo f**k cheap! |
I've bandied this around with a few people before, but it's got to be worth seriously looking into if you have house gas, it's so cheap and better quality i.e. 100% propane as far as i've heard. You need a pump that doesn't pose a heat/ignitiion risk of course. |
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vrblou02
Fordmods - Getting Side Ways
Age:20
Posts: 553
Joined: 02 Apr 2007
Location: blue mountains NSW, Australia
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| Posted: Sun Jun 08, 2008 10:51 am Post subject: |
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this seriously sounds cool
and the new cheap way
any1 else got any more info on how id go about this CNG and costs???
cheers
dRIFTY |
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PoweredByCNG
Fordmods Oompa Loompa
Posts: 42
Joined: 18 Sep 2007
Location: Perth WA, Australia
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| Posted: Sun Jun 08, 2008 11:54 am Post subject: |
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| relaxed_diplomacy wrote: | | and better quality i.e. 100% propane as far as i've heard... |
FYI, CNG is 90%+ methane (CH4).
Regards,
Dave |
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vrblou02
Fordmods - Getting Side Ways
Age:20
Posts: 553
Joined: 02 Apr 2007
Location: blue mountains NSW, Australia
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| Posted: Sun Jun 08, 2008 4:27 pm Post subject: |
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| any more info on this cng? |
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PoweredByCNG
Fordmods Oompa Loompa
Posts: 42
Joined: 18 Sep 2007
Location: Perth WA, Australia
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| Posted: Sun Jun 08, 2008 6:17 pm Post subject: |
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| vrblou02 wrote: | | any more info on this cng? |
CNG as a fuel is very popular in Europe and is used mainly in buses in Australia (for those who don't know, LPG buses are EXTREMELY rare). It is stored as a gas under pressure at around 200-250 bar maximum. Unlike LPG, CNG does not liquefy readily under pressure and therefore larger tanks are required in order to achieve acceptable range. CNG cars are are in Australia, although recently I have seen a CNG-powered Holden Rodeo in the Perth suburbs. In the late 1990s, a project was undertaken in Melbourne to trial CNG Falcons as taxis.
The characteristics of CNG are similar to the characteristics of LPG. Methane has an extremely high (~130) octane number but a very low cetane number, meaning that it does not respond well to compression ignition but has a very high knock tolerance in spark ignition engines. A CNG-optimised engine has a very high compression ratio (up to 15:1 or so is possible) or has a lower compression ratio when combined with forced induction. The lean-misfire limit of CNG is very high (around Lambda=2), meaning that extremely lean air/fuel ratios can be utilised for higher thermal efficiency. CNG is also safer than LPG because it disperses into the atmosphere in the event of a leak.
With regards to engine components, LPG and CNG have many similarities. Venturi, air-valve, and injected (both single-point injection and sequential multipoint injection) systems are available.
Regards,
Dave |
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PoweredByCNG
Fordmods Oompa Loompa
Posts: 42
Joined: 18 Sep 2007
Location: Perth WA, Australia
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| Posted: Sun Jun 08, 2008 6:24 pm Post subject: |
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| DOUBLE-POST, sorry! |
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