LPG injection on diesels

[kiwi winchtruck]

Gid'ay all, To get some extra grunt from my GQ TD42, I'm looking into LPG injection to put some spring into the old donk. It is already turbo'd with a Safari kit which comes with the 3" mandrel bent exhaust. Some good success has been made with this injection system on other competition diesels, but I need more info to satisfy my curiosity and I suppose to reinsure myself it is the right thing to do. I aim to use it as a "on demand system" simular to nitrox on petrol engines.
Any one had experiance with this???

[bogged]

Why not go with a 350 Chev Conversion ?? Sell the Turbo and donk you would cover the purchase and part conversion cost of the Chev.

Could end up cheaper specially if the injection goes pearshaped like one I heard about (I looked at this too!) which blew the ass out of 2 pistons..

[bj on roids]

A mate of mine was running something called team green (Tony Dodds) he hasnt had any problems, turbo diesel, GQ patrol, running LPG, he claims awesome power gains!

[kiwi winchtruck]

Thanks guys, will keep looking into the injection system as it looks to have alot of plus's for competition use if used correctly.
Cheers

[dumbdunce]

propane injection works very well with direct injected turbos but the gains are minimal on indirect injected engines, something to do with colliding flame fronts which manifests as severe knock that can blow the crowns through pistons, bust valves, all kinds of bad stuff. better to spend the money on intercooling, better turbo, some time on the dyno with pyro and boost gauge hooked up.

I've tried it with a regular BBQ cylinder, acetylene regulator and a LPG shutoff solenoid, on a couple of toyotas - a 1HZ (no turbo), there was a barely noticable increase in power, but lots of smoke, and on my 2L-T 2.4 turbo, the power increase was more noticable but to get a seat of the pants noticable increase needed enough LPG to make nasty big end noises, just wasn't worth the panicky 'it's gonna blow up' feeling.

of course my method was a bit hit and miss as there was no proportional mixing, just hitting the gas with a preset pressure at the regulator, on full throttle. a proportional system might give better results.

ymmv.


cheers

Brian