LPG Front End Conversion (to Vapour Sequential System

Submitted: Tuesday, Jun 12, 2012 at 11:57

ThreadID: 96207 Views:2228 Replies:2 FollowUps:10

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Dermottj

Hi,

I've got a 2001 6 cylinder Toyota Landcruiser that is dual fuel (old LPG system) and am trying to weigh up the benefit of doing a front end conversion to the LPG system which would, by the research I've done, increase the power and economy substantially.

Am I on the right track (I'm not going to sell the car & buy a diesel!, cant afford another $10,000 at the moment)? I'm going to keep the car a minimum 5 years, possibly 10 and have read that the new system will give 95% efficiency of petrol wheras my current system is probably lucky to be 70% efficiency compared to petrol.

Anyone have any actual experience of this? Any advice would be great, I expect that the front end conversion would be around $3,000 prior to any rebate (if I can get it).

Cheers

Derm

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Reply By: GT Campers - Tuesday, Jun 12, 2012 at 12:42

Tuesday, Jun 12, 2012 at 12:42

I have SEFILPG (!) on my 4.0L V6 Hilux, it's terrific. You can't tell it's there; system is "transparent"

95 percent isn't quite right ... but it's not far off and no matter what the number, it's much better than the old-school leaking tap system. Despite my 50,000km annually, I can't give accurate comparitive petrol figures however, I can relate 20 per 100km on gas. That's lifted, bar, winch, Coopers, towing 1000kg GT Camper trailer (good aero) ...at 110+ km/h. So 350km of towing costs me around $50 and I do better when I slow down
HTH

AnswerID: 488270

Follow Up By: Dermottj - Tuesday, Jun 12, 2012 at 13:19

Tuesday, Jun 12, 2012 at 13:19

Thats really helpful to be honest, mines a 4.50L six but I'd imagine that the figures would be at least comparible.

Cheers

FollowupID: 763489

Follow Up By: Dermottj - Tuesday, Jun 12, 2012 at 13:27

Tuesday, Jun 12, 2012 at 13:27

Forgot to ask though, whats your around town consumption like?

FollowupID: 763490

Follow Up By: GT Campers - Tuesday, Jun 12, 2012 at 13:32

Tuesday, Jun 12, 2012 at 13:32

sorry, don't know, all my trips are rural and freeways/highways, plus some bush/gravel/sand work

FollowupID: 763492

Reply By: wizzer73 - Tuesday, Jun 12, 2012 at 16:06

Tuesday, Jun 12, 2012 at 16:06

My vapour system on my V6 jackaroo gets about 88-90% of the fuel economy of running on petrol. The power is very close either on LPG or petrol.

So with rough figures here, if you are saving 1 litre per 100km lets say that is a saving of $1 per 100km. It will take 300000km to get your $3,000 back. Probably not worth it??

wizzer

AnswerID: 488282

Follow Up By: Dermottj - Tuesday, Jun 12, 2012 at 16:38

Tuesday, Jun 12, 2012 at 16:38

If your figures correlated through to mine I reckon there would be a fair saving vs my current system (18 - 20% more efficient) so hopefully, if I go through with it the saving per 100 should be 6 - 8 litres per 100km?

FollowupID: 763503

Follow Up By: GT Campers - Tuesday, Jun 12, 2012 at 16:48

Tuesday, Jun 12, 2012 at 16:48

20L per 100km on LPG = 70 litres of LPG to do 350km.
At 75cpl that's $52.50

17 litres per 100 on petrol = 59.5 litres to do 350km.
At 1.40cpl that's $83.30.

Dermottj.. as you are already on LPG, as Wizzer has pointed out it will take a long time to get the money back LPG vs LPG EFI

FollowupID: 763505

Follow Up By: Dermottj - Tuesday, Jun 12, 2012 at 20:46

Tuesday, Jun 12, 2012 at 20:46

Boys, just to clarify....

I'm currently using around town 32 liters of LPG per 100kms which is 12 liters more than what you are saying you use with your systems (probably around 27 - 28 on a trip).. Seems like there would be some savings in a front end conversion however if I'm not understanding your angle please let me know.

Derm

FollowupID: 763521

Follow Up By: wizzer73 - Tuesday, Jun 12, 2012 at 21:19

Tuesday, Jun 12, 2012 at 21:19

Holy crap...32L/100km?? Are you towing something heavy? My Jack does around 25-28L/100km when I'm towing a jayco expanda.
I have a friend with an auto 80 series (97 i think) with the 4.5L petrol converted to LPG on the old mixer system. He runs large tyres (315's i think), big suspension. He gets around 22L/100km around town on LPG .
If you are not towing then I think there is something amiss with your system. What fuel economy do you get on petrol?

FollowupID: 763524

Follow Up By: Dermottj - Tuesday, Jun 12, 2012 at 21:48

Tuesday, Jun 12, 2012 at 21:48

I haven't checked to be honest, I've only had it 5 weeks so I'd have to check. Talking to the bloke I bought it off it's about what he was getting from when it was installed 7-8 yrs ago.

FollowupID: 763527

Follow Up By: wizzer73 - Tuesday, Jun 12, 2012 at 22:05

Tuesday, Jun 12, 2012 at 22:05

Before you spend big$ on the vapour conversion I think it would be wise to take it to a LPG specialist for them to look at. 32L/100km sounds excessive.
good luck

wizzer

FollowupID: 763533