Gas conversion

Discussion and technical advice for 84-89 AW10 & AW11 MR2. 3A-LU, 4A-GE, 4A-GZE.

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ulysess1966
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Gas conversion

Post by ulysess1966 »

Hi. I've been thinking about using my SC as a daily car, but with the relatively high mileage I do the cost would cripple me. Yesterday I was driving past a filling station and noticed that LPG was still only 58p a litre. I made a couple of calls to companies in Belfast who do conversions, but they said they don't touch cars older than about 3 years.

I remembered then that someone (was it Mr Woods?) did an LPG conversion on an MR2 and wondered how that worked out. Is it a hard thing to do yourself? I see the kits are for sale online.

Thanks
Glenn
BIGBOBO
Posts: 531
Joined: Sun Dec 02, 2007 1:05 am
Location: Belgium

Re: Gas conversion

Post by BIGBOBO »

In Belgium you can't do it yourself since it has to be done by a professional.
Afterwards it needs a yearly check etc.

I saw a couple of gas powered mr2's in holland while I was looking for one myself, decided not to buy them since importing would be way to much hassle.
mk1 envy

Re: Gas conversion

Post by mk1 envy »

I have to say ive been thinking about this myself - but i really dont want to lose space in the boot - as there isnt much to start with anyway lol

Heres the link to the conversion

http://www.mr2mk1club.com/LPG.html

Other thing to consider is how readily available is the LPG at your local garages - this is another reason why i dont want to do it - as the nearest station with LPG is about ten miles away :cry:
kevin..in
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Re: Gas conversion

Post by kevin..in »

as ever its a refer to Paul Woods for this :wink:

http://www.mr2mk1club.com/LPG.html
010on1986
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Location: UK

Re: Gas conversion

Post by 010on1986 »

It would be interesting to know is anybody has any comments on using LPG and a Supercharger...sufficient octane for boost?

DYOR!!

http://www.go-lpg.co.uk/Turbo.html --- as follows :-

Yes they can, and very well if the job is done properly.

BUT! If the correct type of conversion equipment is not used the vehicle could be extremely dangerous..........


Open and Closed Loop single inductive mixer equipment is NOT suitable for the Conversion of any Turbocharged or Supercharged engine.

Read thorugh the description of both Open and Closed loop single mixer conversions to understand backfiring and is causes, then multiply the effect by the power of at least 6 for the gas capacity of the inside of the Supercharger, then you'll see why such an event would be very memorable indeed.

We are not speaking of a friendly little pop now and again, more like an eventual (inevitable) explosion of large enough magnitude to take the Bonnet (and maybe even the Driver) with it.

That isn't the only risk either - Putting LPG vapour through a Supercharger will tend to dry out any lubricant in the rotor bearings which will end in Supercharger seizure sometime down the line. If such siezure does occur, it might just result in the snapping of the drive belt and a hefty bill for a new Supercharger unit. It could also result in a bill for a new engine if any broken Supercharger fragments are inducted.

Correct Conversion

For clarity, the only way a Turbocharged or Supercharged engine can be converted properly (safely) is by using a correctly selected and installed multi point injection system. When this is done there will be no risk of backfiring nor any damage to rotor bearings as the inlet manifold (and the Turbo or Supercharger unit) will only contain Air - Just they do when running on petrol. To see properly converted Tubocharged and Supercharged cars here are some suggested links - XJR V8, XJR6 or Maserati Bi Turbo
ulysess1966
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Turbos

Post by ulysess1966 »

That's certainly worth considering because I wouldn't want to be blown up and I appreciate that LPG is dangerous if handled incorrectly.

My mate's folks lived in Spain for a few years and brough a Volvo LPG car back with them and it was a turbo. I think they still have it, but it isn't used so I could investigate that.

Looks like it could be expensive.

As an aside... I've been talking to Smart about an LPG microcar, another way to pay to keep the MR2 on the road.
PW@Woodsport
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Re: Gas conversion

Post by PW@Woodsport »

LPG is superb on an mr2,i drove my stock mk1 on it for over a year,halved my fuel costs and doubled the range of the car :thumleft:

It does mean losing the boot though
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MartG
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Re: Gas conversion

Post by MartG »

Would an LPG tank fit in the frunk ? ( assuming a spacesaver spare or just a can of tyre foam )
PW@Woodsport
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Re: Gas conversion

Post by PW@Woodsport »

A small LPG tank would yeah..... you can get them really small for quads and the like.The filler point would have to go on a front wing though....
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GaryR
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Location: Cambridge

Re: Gas conversion

Post by GaryR »

So what's the rough cost of having it done ?
HT
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Re: Gas conversion

Post by HT »

PW@Woodsport wrote:A small LPG tank would yeah..... you can get them really small for quads and the like.The filler point would have to go on a front wing though....


Paul does still thinking about this myself and would opt for the frunk - does this filler have to external could it not be inside the frunk?? rgds Huw
PW@Woodsport
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Re: Gas conversion

Post by PW@Woodsport »

no its impossible to put the filler inside for safety reasons,propane is heavier than air and there is always a small release of LPG when you disconnect the filler nozzle.This gas would gather in your spare wheel well and it would only take the spark from a clicking relay to cause an explosion.All LPG fillers have got to be on the outside of the vehicle.

Gary you can get a full kit for £500,fitting takes around 2-3 days at most places.... ive no idea what the current rate is for labour but it used to cost around £1200 all in to gas up a car,its a lot more these days with direct injection systems though,but luckily mr2's will run happily on the more basic single point.

I converted dozens of cars many years ago,its not a perfect fuel,you do get the odd problem like an occassional stall at a junction (maybe 1 in 50),sometimes never.... and a few oddities you wouldnt get running on petrol,but i love it and have been running LPG vehicles for the last ten years.
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HT
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Re: Gas conversion

Post by HT »

PW@Woodsport wrote:no its impossible to put the filler inside for safety reasons,propane is heavier than air and there is always a small release of LPG when you disconnect the filler nozzle.This gas would gather in your spare wheel well and it would only take the spark from a clicking relay to cause an explosion.All LPG fillers have got to be on the outside of the vehicle.

Gary you can get a full kit for £500,fitting takes around 2-3 days at most places.... ive no idea what the current rate is for labour but it used to cost around £1200 all in to gas up a car,its a lot more these days with direct injection systems though,but luckily mr2's will run happily on the more basic single point.

I converted dozens of cars many years ago,its not a perfect fuel,you do get the odd problem like an occassional stall at a junction (maybe 1 in 50),sometimes never.... and a few oddities you wouldnt get running on petrol,but i love it and have been running LPG vehicles for the last ten years.



Any idea how big a tank will fit in the frunk?
System-G
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Re: Gas conversion

Post by System-G »

Sorry, but personally, I don't see the point of LPG on a sports car? :shock: :-:
85 MK1 MR2 Track N/Ail | 99 528i SE Touring | 01 Mandarin VX220
un1eash
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Location: Leicester

Re: Gas conversion

Post by un1eash »

The point is to save money garrick, you can switch between the 2 at will.
crazybrightman
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Location: leicestershire

Re: Gas conversion

Post by crazybrightman »

i think you need to think about the price of lpg as im sure the duty is about to go up on it. lets face it its like diesel they kept the duty low until plenty of people were using the fuel and then started incresing the duty. your best bet is to get a cheap diesel and run it on used cooking oil that way your fuels free and you dont line the pockets of people i cant describe without using offensive words.
un1eash
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Re: Gas conversion

Post by un1eash »

Its hard to find a good source of used cooking oil, veg oil new use to be 50p a litre when i tried it.
System-G
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Re: Gas conversion

Post by System-G »

I know the idea of it, I just don't see the point on a sports car :mrgreen:
85 MK1 MR2 Track N/Ail | 99 528i SE Touring | 01 Mandarin VX220
HT
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Joined: Sun Mar 26, 2006 12:17 am

Re: Gas conversion

Post by HT »

System-G wrote:I know the idea of it, I just don't see the point on a sports car :mrgreen:


Yeah it doesn't make sense Garrick, but in my own case the mk1 is everyday transport of preferred choice. So I kinda want to enjoy driving it as much as possible. :D Having done over 500 miles on saturday at a cost of £75+ unleaded, LPG is starting to make sense. :wink:
MartG
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Re: Gas conversion

Post by MartG »

System-G wrote:I know the idea of it, I just don't see the point on a sports car :mrgreen:


You drive to & from the track on lpg, and use the SUL while on track :wink:
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