Propane injection in diesels

Post by **vn15** » Sat Apr 09, 2005 8:26 pm

Chucky wrote:I saw Brett Preit(Spelling?) From LCMP had a lpg sticker on his rego plate when at the extreme winch challenge in March and was told he runs lpg on his GU diesel ute. The truck did get up and go but it blew a shit load of smoke out the exhaust.
I don't know what system he was running, any details or even if it was switched on.

I think you mean Brent Perrett, he drives a grey GU ute.
On the xtreme4x4 website there was some info on it a couple of years ago, late 2003 I think.
From what I remember, it had 160HP without gas, and 208 with gas. Dynoed at ARB Northside, correct me if I am wrong.

On the last XWC DVD 2004, it didn`t blow any smoke to speak of, but on the photos from this years XWC series, I too have noticed that it blacksmokes a lot.
Propane/LPG should clean the exhaust, my propane-kit does.

I have noticed a different exhaust sound from my truck, it runs smoother and more quite with propane.

Post by **-Richo-** » Sat Apr 09, 2005 9:31 pm

turps wrote:Was talking to Dan the other day about this. I realise having the gas injecteded into the system upstream allows for good mixing. But would it be possible to have a gas jet installed just before the inlet manifold. Somewhere between Intercooler and the inlet manifold.
Then as it would be doing all its expanstion (liquid to gas), in the inlet pipe before the manifold. It would be able to cool the incoming air some more.

Would this be correct?
Also, after driving an XR6T yesterday with a glowing turbo (it was way fun making it glow). WOuld there be anychance of the gas igniting in the turbo and blowing it to hell?
Also do disel turbos glow red after a good hard run?

In theory im assuming injecting the gas after the turbo should cool the charge, probably lower than an intercooler would therefore negating its purpose. But the mixing side of things i am not sure on, maybe there is info on it on US sites, there seems to be more places selling kits over there but i havent been able to find a detailed run down of how it all works and why things are set up the way they are.

Thats interesting about glowing turbo and propane, dont know how volatile it is, again though i dont know much about the system, i dont think id ever get the turbo glowing on my 2.8 though

Post by **toughnut** » Sat Apr 09, 2005 9:48 pm

vn15 wrote:
Chucky wrote:I saw Brett Preit(Spelling?) From LCMP had a lpg sticker on his rego plate when at the extreme winch challenge in March and was told he runs lpg on his GU diesel ute. The truck did get up and go but it blew a shit load of smoke out the exhaust.
I don't know what system he was running, any details or even if it was switched on.

I think you mean Brent Perrett, he drives a grey GU ute.
On the xtreme4x4 website there was some info on it a couple of years ago, late 2003 I think.
From what I remember, it had 160HP without gas, and 208 with gas. Dynoed at ARB Northside, correct me if I am wrong.

On the last XWC DVD 2004, it didn`t blow any smoke to speak of, but on the photos from this years XWC series, I too have noticed that it blacksmokes a lot.
Propane/LPG should clean the exhaust, my propane-kit does.

I have noticed a different exhaust sound from my truck, it runs smoother and more quite with propane.

Yeah Brent has his pump wound up way high. He has the truck tuned to the gas and full noise on the turbo so when he's not running the gas (which he turns off when he doesn't need it) and its off turbo it blows a crap load of smoke. Matty bolger's GU does the same thing. He has a huge turbo and runs around 26psi of boost. It blows heaps of smoke until the turbo winds up.

Post by **ca18escort** » Wed Apr 13, 2005 7:59 pm

Ok a couple of things. Never run the LPG in front of the turbo if you have an intercooler as there is a chance that it could turn into a BBB (Bloody Big Bomb) the second thing is that you should have a convertor that changes the liquid to gas and heats it with your engine coolant. This is done so that you don't go freezing things in your engine. I have in the past used an LPG cylinder to cool down beers with the gas. Works very well probably not the best for your engine. So my advice would be this plumb it in after the intercooler anf use a convertor. If you want to use the LPG to cool the intake air then put an adjustable valve on the hose that goes to the convertor so that you can adjust the temp of the gass as it enters the engine.

Paul

Post by **macuserau** » Thu Mar 16, 2006 8:12 pm

http://www.gasresearch.com.au/

Post by **xenith** » Thu Mar 16, 2006 8:51 pm

IF FITTED AFTER INTERCOOLER AS TI SHOULD B IF ONE IS ON THE CAR BUY LAW. then u have to run an ajustable concerter as boost goes up less gas will flow due to less pressure diffrence . trucks all over the world have run this system for years most systems are very crude hence the switch. but yes it dose make more power around 20-30% makes exhause cleaner buy burning more of the fuel hence cleaner oil. but as for saving $ not much if u drive the same as before yes but lets face it no one dose (i know someone is saying but i will don't kid your self

Post by **Mark2** » Fri Mar 17, 2006 9:57 pm

I'm not sure that the gas would cool the charge all that much as even though yes it is cold, the amount of gas compared with the volume of air flow would be very small

Post by **V8Patrol** » Sat Mar 18, 2006 7:18 am

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Propane injection in diesels

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