LPG Diesel... results.
Submitted: Monday, Aug 25, 2008 at 09:33
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Member - Royce
Okay... after a fair bit of driving here are the results.
My Supatrupa uses a wopping 17l/100ks on diesel.
With LPG 14l/100ks and 4.65l LPG/100k
That provides a savings of $2.40 or thereabouts per 100ks.
Greatly improved power and driving performance, and greater range.
It will take 50, 000ks to save back the $1200 it cost on top of the $2000 grant.
One year or less.
Cheers Royce
Reply By: Skippype - Monday, Aug 25, 2008 at 09:55
Monday, Aug 25, 2008 at 09:55
Excuse my ignorance but how does the LPG / diesel system work? Does it inject the LPG into diesel as it goes into the system? My new 70 series V8 uses 17.5l/100km even with a 3" exhaust & DP chip.
Skip
AnswerID:
322101
Follow Up By: Member - Royce- Monday, Aug 25, 2008 at 10:22
Monday, Aug 25, 2008 at 10:22
Surprised at your high fuel useage Skip.
The gas is injected into the air intake in my system, which is [I think] an older system. Others will probably fill you in on the eco-whatever system and others.
From my research, it is supposed to help the diesel burn more efficiently and cleaner, both in the system and exhaust.
I was very sceptical and waited for a good time before I leapt in. My engine is very
well used, so I was also worried that maybe it wouldn't cope.... but touch wood all okay so far.
My 4wd mechanic doesn't like the idea at all... but that's the way it goes. You can never find agreement on these things.
PS... unloaded and driving very carefully... dropping speed a bit etc, I have been able to squeeze 16l/100k and my big truck weighs 3 tonnes+
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Follow Up By: Skippype - Monday, Aug 25, 2008 at 12:42
Monday, Aug 25, 2008 at 12:42
Thanks for that fellas. I will look into it a bit further. I think the high fuel usage on
mine is because it is my work vehicle up here in the Cooper basin so it is doing a lot of lower gear work. Having said that I did take it home to Victoria few weeks back and driving at a steady 100kph it was using about 6.5l/100km.
Thanks for the info Royce & Brad
Skip
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Follow Up By: Krakka - Monday, Aug 25, 2008 at 17:14
Monday, Aug 25, 2008 at 17:14
Skip, maybe you mean you got 6.5km per lt, or did you use 16.5lt per 100km?
FollowupID:
589107
Reply By: ross - Monday, Aug 25, 2008 at 10:53
Monday, Aug 25, 2008 at 10:53
Does the arkana body add much to the fuel economy?
Most 1HZs can get 13/100 and I get 12.5/100 in my unloaded 75 series ute.
I got about 14+ when I had the canvass on the back.
I liked the Arkana bodies and nearly bought an
ambulance model once.
AnswerID:
322110
Follow Up By: Member - Royce- Monday, Aug 25, 2008 at 11:04
Monday, Aug 25, 2008 at 11:04
It's a bit better than a red brick .... my old hj47 was the red brick as far as aerodynamics was concerned!
The body has about 40cm added between the axles and another meter at the end. It's also got a full roll fram inside with some more substantial framing in the body. So shape and weight all add up to adding to the fuel cosumption.
Compared to a standard troopie it's got so much more room! I've added a pop top which sometimes gets used, but I can stand up and walk around without.
I
camp out all over Oz... [even in the middle of the Big Smoke] as I tour. It does the job very
well.
Snapped the BLHS axle studs last week. Wish she wouldn't do that!
Cheers Royce
FollowupID:
589051
Reply By: TerraFirma - Monday, Aug 25, 2008 at 14:09
Monday, Aug 25, 2008 at 14:09
Royce, if it used 17Litres on diesel but now uses 14l diesel + 4.65 litres gas isn't that 18.65 litres or am I reading that wrong.? Also how does she drive now..? Noticeably more power, smoother etc..?
AnswerID:
322121
Follow Up By: Member - Royce- Monday, Aug 25, 2008 at 16:05
Monday, Aug 25, 2008 at 16:05
LPG takes you a lot less distance than diesel. Diesel takes you further than petrol. But... for the moment LPG is a HECK OF A LOT cheaper than diesel.
It's a totally different drive..... instead of a lumpy truck she drive like a car....
well unless you jump into a car straight away and realize that that is really rubbish...
It is able to cruise around corners in third, that I would have had to drop to second for. It goes about a third of the way further up our big
hill 'Power's
hill' before I need to change down to third from fourth.
Way smoother. One small problem I've had is a sudden drop in power if I put my foot down too hard, too quick.... just every so often. No big deal. Not sure if it's flooding or too much LPG...
The better driving is easily worth the money. I have added headers, extractors, tuboes to vehicles and never had such a noticeable difference in power.
Cheers Royce
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Reply By: PeterInSa - Monday, Aug 25, 2008 at 16:54
Monday, Aug 25, 2008 at 16:54
Royce, All
My understanding is that when first fitted (Diesel/LPG), black smoke comes out the exhaust for some time as you burn off the carbon at the top of the cylinders, the older the engine the longer it takes to get rid of the carbon. Did you have this situation???
The head of my cruiser has not been off for all of its 300,000K's so I might have black smoke coming out for some time.
My understanding is that two much gas can ruin the engine do you have a inline flow meter or just accept the mechanics adjustment.?
I am wary that by doing a fair bit of rough road driving, LPG adjustments may change due to vibration and then No One is to blame for a stuffed engine due to increased gas.
Thanks for your Fuel Stats.
Peter
AnswerID:
322137
Follow Up By: Member - Royce- Monday, Aug 25, 2008 at 18:01
Monday, Aug 25, 2008 at 18:01
No black smoke appeared at all. I do notice a bit more white smoke...
There is an inline flow meter. As you put more diesel through, the gas flow increases.
The mechanic's adjustment will always be better than
mine.... believe me. Whenever I make an adjustment.... I have to appologise to a mechanic somewhere down the line!!
I guess rough road driving can lead to all sorts of problems and therefore means that more regular servicing or checking is needed.
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Follow Up By: PeterInSa - Tuesday, Aug 26, 2008 at 12:10
Tuesday, Aug 26, 2008 at 12:10
Royce,
What brand is your Diesel/Gas system. The
cheapest system that I have come across was $3,500 installed.
Thanks
FollowupID:
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Follow Up By: Member - Royce- Wednesday, Aug 27, 2008 at 00:11
Wednesday, Aug 27, 2008 at 00:11
I've just checked through the paper work and can't find a brand name anywhere. EastWest Autos in Moe did the work. Felt very good about their attitude and the work looked good.
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Reply By: Member - Bob of KAOS - Wednesday, Aug 27, 2008 at 20:03
Wednesday, Aug 27, 2008 at 20:03
I have the GFSI system.
Using a ScanGauge to monitor throttle opening, and using cruise control, switching the gas on and off makes a huge difference. The amount of throttle need to maintain speed is significanltly less with the gas turned on. The increase in driveability is also quite noticeable.
I am still using the wrong ratio of gas to diesel (1:3) when it should be 1:5. So I get through the gas much too quickly.
They have a modem system that enables them to tune it on the fly as long as you are in a GSM covered area. I hope to do this soon.
I have a long thin 20 L gas cylinder that lies along side the chassis rail. I might fit another on the other side as gas is not widely available. Its $1.22/L at
Yulara.
AnswerID:
322516