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Old 03-29-2011, 11:44 PM   #1
2Tone04
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News Propane conversion kit

Has anyone attempted/completed a propane conversion kit on a WRX/STI? I am looking for specific data on pro's/con's....Can anyone help??
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Old 03-30-2011, 12:08 AM   #2
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What?
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Old 03-30-2011, 12:13 AM   #3
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I dont think you can use regular injectors for propane because it is a gas. I dont think the injectors seal well enough. So if you were going to do that, you'd probably have to setup a pressure regulator system and individual nozzles instead of injectors. IMO such a conversion would be impractical (they do it on some ford trucks though so it is possible that I am wrong).
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Old 03-30-2011, 12:19 AM   #4
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There was a company that would convert any car to propane use and have it certified. I'd see them post on Honda-tech once in awhile. Might try searching there.
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Old 03-30-2011, 12:25 AM   #5
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I doubt they would do it on a turbo car
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Old 03-30-2011, 12:28 AM   #6
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This can't be real lol
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Old 03-30-2011, 12:30 AM   #7
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Do this with an older car. Why would you do this with an STi?
They're already being slain by 16 year olds, we don't need you to be Dr. Josef Mengele and do funky experiments.
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Old 03-30-2011, 12:33 AM   #8
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I would think that tuning would be an interesting process.....
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Old 03-30-2011, 12:57 AM   #9
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This **** ain't no diesel son.
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Old 03-30-2011, 01:37 AM   #10
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Old 03-30-2011, 02:58 AM   #11
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Get a Volkswagen Jetta Diesel and add a Vegetable Oil kit. I have been told you can buy pre prepared vegetable oil for like $1.25 to fill a moderate size tank.

Propane is kinda $$ and this would be a full conversion vs the fryer oil kit that aids to your fuel system.

But if you really are all gun ho on doing the Propane, I would NOT do it on a WRX/STi. Turbocharge, sensitive to tune....vs a Honda
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Old 03-30-2011, 03:20 AM   #12
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The vegetable oil conversions are overrated IMO. I've installed several Elsbett veg oil conversion kits on VW's, two tanks is the preferred method, one for veg, one for diesel with a big switching valve plumbed in between the two tanks and supply/return lines to the engine, so you can warm the car up on diesel then change to veg oil on the fly via dash mounted switch. The veg oil needs to be preheated quite a bit before the engine likes to run on it, BIG heating elements and filter assemblies are required. And unless you have some kind of "connection," the average person pays more per gallon for veg oil vs. diesel.

IIRC Dr. Chaos has been experimenting with a liquid propane setup for his 2.2l Bimmaru, you could try contacting him.
http://forums.nasioc.com/forums/show...ght=bmw+subaru
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Old 03-30-2011, 03:53 AM   #13
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OK, I'll bite...
I'm guessing you're asking about this for ecological and/or economical mpg reasons but could there possible be and power gained from fueling on propane?

From a practical standpoint though I imagine getting this to work would be a nightmare, you'd first have fine some way to get the propane into the engine as fuel injector are designed for liquid not gas, and then to tune the car to run safely, I can't imagine there are many tuners out there with experience with tuning for propane fuel.
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Old 03-30-2011, 07:28 AM   #14
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We have a lot of propane/buthane converted cars, including Subaru (and turbo).
You basically have a gas tank in your boot, e.g. instead of your spare wheel.
Then you have injectors drilled into your intake manifold.
The whole system hooks up to your ECU and does not need any modifications.
Latest LPG systems also inject compressed gas directly into the cylinder, so as it expands it cools the air (you all know what that means).
Generally mileage and power loss is considered to be around 5%.

There are quite a few manufacturers of such equipment in Europe, like Lovato, Landirenzo (both Italian).
Benefits? First it's cheap. When 1 liter (1/4 galon) of gasoline costs almost $2 and LPG costs less than $1.
Second - it's ecological, LPG is a byproduct of gasoline production and burns much much cleaner.
Third - LPG has an octane rating of ~100, so with proper adjustment you could run more boost.

The downsides - LPG burns "dry" and has impact on valves in Subaru. That is not the case in most other cars, they run >200k miles on LPG just perfectly.
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Old 03-30-2011, 12:18 PM   #15
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Just curious, but what does this have anything to do with interior & exterior modification?
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Old 03-30-2011, 01:03 PM   #16
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Quote:
Originally Posted by Dzhedaj View Post
We have a lot of propane/buthane converted cars, including Subaru (and turbo).
You basically have a gas tank in your boot, e.g. instead of your spare wheel.
Then you have injectors drilled into your intake manifold.
The whole system hooks up to your ECU and does not need any modifications.
Latest LPG systems also inject compressed gas directly into the cylinder, so as it expands it cools the air (you all know what that means).
Generally mileage and power loss is considered to be around 5%.

There are quite a few manufacturers of such equipment in Europe, like Lovato, Landirenzo (both Italian).
Benefits? First it's cheap. When 1 liter (1/4 galon) of gasoline costs almost $2 and LPG costs less than $1.
Second - it's ecological, LPG is a byproduct of gasoline production and burns much much cleaner.
Third - LPG has an octane rating of ~100, so with proper adjustment you could run more boost.

The downsides - LPG burns "dry" and has impact on valves in Subaru. That is not the case in most other cars, they run >200k miles on LPG just perfectly.
too bad LPG isn't really available in the states or I would have switched a long time ago...

makes me wonder why it isn't. Doesn't the US have plenty of natural gas on US soil? Instead we get the peanut factory, "dis ain't no diesel son"
Ignoring the fact that a good percentage of cars in Europe and Canada run on LPG. I think Ohio has started to have it more available too.
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Old 03-30-2011, 10:28 PM   #17
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This reminds me of what I am thinking of I like the idea of HHO injection for more MPG check out my thready on it the gas goes right into the intake from a fuel cell and after a couple miner adjustments with Oxygen sensors and stuff like that big gains are possible. One Subaru guy on the forum I have in my thread got six more miles to the gallon and more power.
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Old 03-30-2011, 10:38 PM   #18
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Quote:
Originally Posted by mneste8718 View Post
too bad LPG isn't really available in the states or I would have switched a long time ago...

makes me wonder why it isn't. Doesn't the US have plenty of natural gas on US soil? Instead we get the peanut factory, "dis ain't no diesel son"
Ignoring the fact that a good percentage of cars in Europe and Canada run on LPG. I think Ohio has started to have it more available too.
LPG is available at alot of places but not dispensed readily for automotive use but for heating.

Propane injection used to be somewhat of a popular as a power adder in the early 90s in the 3000gt TT crowd. There are some writeups and reviews on 3si.org. The scene has died out since there are safer ways to introduce more octane into your fueling ,than have a tank of high pressure flamable gas in the car.
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Old 03-31-2011, 12:36 AM   #19
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OH! LPG! Ok, yeah that's where I thought this thread was headed.

I have nothing to add. Just wanted to make a snarky remark.
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Old 03-31-2011, 12:55 AM   #20
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When i was in peru, almost everybody ran LPG in their cars. there were conversion places all over the place. Peru is a pretty much dirt poor country, so if they can do it, I'm sure you can get it done.
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Old 03-31-2011, 01:04 AM   #21
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There are also more turbo diesels out there, might want to consider that, but where do you reliably buy propane and/or diesel these days!?
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Old 03-31-2011, 08:22 AM   #22
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Don't mix up natural gas and propane/buthane.
First is even cleaner to burn, but has to be stored in a compressed in very very high pressure.
LPG is not excavated, it's a byproduct of fuel production from oil. It is stored in a liquid form in relatively low pressure.

Driving with a tank high pressure gas? Aren't you afraid to drive with a tank of low pressure gas highly flammable gas (fuel vapor that is)?
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Old 03-31-2011, 08:35 AM   #23
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Quote:
Originally Posted by abgusaf View Post
Just curious, but what does this have anything to do with interior & exterior modification?
Indeed.
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Old 03-31-2011, 10:28 AM   #24
mneste8718
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Quote:
Originally Posted by D3F0 View Post
This reminds me of what I am thinking of I like the idea of HHO injection for more MPG check out my thready on it the gas goes right into the intake from a fuel cell and after a couple miner adjustments with Oxygen sensors and stuff like that big gains are possible. One Subaru guy on the forum I have in my thread got six more miles to the gallon and more power.
yea I worked out an HHO cell and it got me 39MPG on the hwy once heh. I still need to figure out a better casing for it. Also, you might want to watch out on using sodium or potassium hydroxide because it will eat aluminum over time, even if it is just in the vapors with the HHO.
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Old 03-31-2011, 10:34 AM   #25
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Sweet... the Outback would have integrated twin Coleman burners in the engine bay for camping and picnic weekends
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