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Posted 28 June 2007 - 05:57 AM
Posted 28 June 2007 - 06:21 AM
Anything can be converted to propane.
its cheaper than gas
It all depends where you live (and how much the propane costs). 1 litre of propane contains roughly 80% the energy of 1 litre of gasoline (providing everything else remains equal). Where I live propane used to be cheaper, it no longer is, so no one in these parts is converting.
effectively a 110 octane
This could be a good thing, or a bad thing, it depends how you are coming at it. The burn rate of propane is slower than gasoline, giving you a big octane number, in reality it just means that you advance the ignition timing 10+/- degrees (trial and error, every application being a bit different).
the benefits are many
Depending where you live, and the operating conditions, there can be about as much "downside", as benefit.
I am not trying to disuade you. CAREFULLY investigate the costs, and the benefits, look at the downsides, and make an informed decision.
Posted 28 June 2007 - 06:48 AM
They have a setup that works with the carb (not EFI)
Bet the setup would work on a Brat
hey come to think about it
I have a tow motor propane set up on the shelf
with a rusty gas tank -ahhhheemmmm??
The downunder gang are the ones you want to ask this to.
Posted 28 June 2007 - 08:18 AM
Posted 28 June 2007 - 08:38 AM
And to add to GD's excellent remarks
here is a quote from their website.
Note: we do not sell kits for late model cars and trucks.(87 and up)Please do not call us about these vehicles as it is not legal or cost effective to do these vehicles.(computer controlled)
Posted 29 June 2007 - 12:14 AM
Using the standard vapouriser/carb setup this cooling effect is actually a disadvantage as you need to run your engine cooling fluid through it to stop the vapouriser from freezing up.
Other advantages are:
The blowby gases are not acidic, so your oil lasts much longer
You never need to use choke, and the fuel doesn't condense on the cylinder walls washing away the oil on startup, so your engine lasts much longer
You can run a much higher compression ratio without detonation, and on a well-built LPG only engine can get similar milage as on petrol.
Environmentally it's much better than petrol.
If you want to use petrol and LPG you will lose space for the tank, a little power and 20% of your MPG.
weight of the extra tank
cost to install
Posted 29 June 2007 - 09:15 AM
Posted 30 June 2007 - 05:30 AM
Google a couple of related search terms. "carburetor" conversion are ALOT easier, and simple enough to do even on an engine designed for MPFI.. the biggest reason to go for the multi port injection concept is high performance applications.. which is something that I (as you will discover if you read the thread I linked to) am EXTREMELY interested in becoming (something of) a pioneer in........
Posted 30 June 2007 - 07:28 PM
first of all, is it possible? has it been done before? has anyone ever heard of it being done? i just think that propane would work better on an offroad vehicle, not to mention that its cheaper than gas and is effectively a 110 octane from what i hear...... the benefits are many, so i figured id see if i could get the legacy converted.....
propane efi has been being done in europe for while now using a piggyback ecu to drive the gas injectors......however i don't see any reason to go gas injection on a subaru as we have alloy intake manifolds and they standup to the odd tuning backfire rather well(unlike the plastic intake manifolds that half the new cars come out with).
the other thing to think about is that due to the cold where you are you'd need to start an warm the motor up on petrol as propane injection needs the gaseous fuel to be 30-40 psi above manifold pressure so the propane tank would need to be at least 10deg C...or you'd need to run a pump to boost pressure back up. (i run a carb'd LPG system an found i needed to run a heater hose back an around my LPG tank because at under -5C it 'just' wouldn't give me enough gas for full noise)
Posted 05 July 2007 - 07:56 PM
Posted 05 July 2007 - 09:55 PM
Posted 05 July 2007 - 10:16 PM
(as reported here: http://fuelfocus.nrc...cfm?ProvCode=NB )
Reg gasoline $1.07L
Auto Propane $1.02L
Propane is 80% as efficient as gasoline, to be equal in value propane at this time should cost .86L.
As I said earlier, there was a time here that propane was worth converting to, it no longer is. (when I was busy doing conversions propane was .19 a liter)
The real "bonus" of a propane installation is when the propane pump jockey figures, with his minimal training, that the surface rust on your propane container (the propane tanks installed under your vehicle) makes your propane container unsafe and refuses to fill you. (in Canada both the system installers and the re-fuelers have to hold a licence, the installers licence is a 2 week course with gov exam giving you a "gas fitters licence", the re-fuelers licence is a 2 hour course, with an open book test at the end).
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