Deisel Gas Injection

Diesel Gas Australia.

With that said - do your homework first.

Gas injection on a diesel isn't as effective for naturally aspirated as it might be for turboed engines according to what I've read.

I have the Gas injection on a 4.2 turboe diesel engine & the results are quite good - they might not be as good on a naturallly aspirated 4.2.

Maybe you could get better performance improvement for the same $ from say adding a turbo, or a turbo & intercooler - and then later adding the lpg injection where the engine can then make use of the extra fuel?.

In order to burn that extar fuel in the LPG - you need enough oxygen available and a naturally aspirated engine will only suck so much air.

Making that air comporessed and forced in with a turbo will add more oxygen and get a better burn as will cooling the air charge with an intercooler make the air more dense and hence more Oxygen in eacgh charge.

Then when you add the LPG - the engine can use it.

The principle of LPG injection is supposedly to compensate for the ineficiency inherrant in diesel engines where heat of compression ignites the fuel charge.

This design - manages to not be able to control very well - where in the pistons stroke the ignition takjes place, and as a result only about 87% efficiency of combustion takes place. When you add the air(O2) and LPG the ignition results in a more complete burn of the available fuel to about 99% efficiency!

Hence you gain a 12% power increase.

Without the extra air - I've read of a Landcruiser diesel naturally injected that got little if any improvement - the air (o2) just wasn't available to get the expected improvement and the vehicles gearing wasn;'t that efficient anyway - meaning what was and couldn't be effectively used anyway....

I reckon with a trucks low gearing that likely you might strike the same scenario.

The attraction of the LPG injection obviously - is because of the Govt rebate/s on installation costs up to $3K depending where you live. ($2K fed grant for eastern staters +$1000 state govt grant for Sandgropers).

If it is a $ constraints leading you toward LPG - maybe get it done while the grants are available,(i.e. before the govt cuts them out under the current fiscal climate)....and tyhen get the turbo and intercooler work done later when you can afford it.

Of course - I have no idea in the Bitsamissing 4.2 desel is designed to take the added HP of a turbo, intercooler or LPG injection - thats for you to determine.

Most Original equipment turbo diesel engines are beefed up considerably to take the added forces involved over their naturaly apsirated cousins.

Usually bigger (4 bolt) mains and larger dia big end journals, heavier con rods, and oil capilliarys that run up the con rods to oil squirters under the piston crown which takles away the higher heat of combustion, into the sump oil to be cooled via an Oil cooler radiator out front & so on.

To add extra HP to an engine not designed from the gorund up to cope with it might not be the wisest of long term decisions, and is something the individual must discern for him her self.

There are a lot of after market turbo fitted vehicles getting around that seem to cope OK with the extra HP of turbos so - it really probably depends on your particular Mitsubishi engine design.

Good luck with it - whaever you choose - keep us posted on how it all goes, what decisions you reach and how the mods work out!

Cheers