Petrol vs Diesel

**Quasievil** · 19th July 2006, 19:12

Originally Posted by onearmedbandit

Mr Evil, could you please post in the correct forum. Huummmpphhh.

[Moving to R or R]

But I ws neither Ranting or Raving, cant get away with anything these days, bloody Mods

**marty** · 19th July 2006, 19:30

i run a 3.5l diamante on LPG - cost about $2800 to install in 2004, i've done 70000kms since then, it's just gone up to 85c/litre, but still costs about the 1800cc corolla work car. the diamante's for sale though, as i've bought an ST-X Navara ute - 2.5l common rail diesel, 5 speed auto (they also come in 6 speed manual), cruise control, 8 speaker stereo, stretched cab so that my 6'2 son can sit behind me when i'm driving. runs the same suspension height as the 4x4, without the extra weight to drag around. is running at 10l/100km atm, but it only has 3000kms on it. it's a fantastic rig - walks all over the 2wd hilux

**Flyingpony** · 20th July 2006, 09:07

Originally Posted by Motu

Oh,and LPG is a dry fuel, it will wear your engine out.

Even on today's engines where they basically use the engines own fuel injection system instead of slapping another carb on the air intake?

I thought it might only be a problem with carb equiped engines because they might be running wet valves and LPG would bugger them?

**Flyingpony** · 20th July 2006, 10:03

Originally Posted by marty

i run a 3.5l diamante on LPG - cost about $2800 to install in 2004

That's very cheap. I've heard it's currently $5k.

**Motu** · 20th July 2006, 10:28

Originally Posted by Flyingpony

Even on today's engines where they basically use the engines own fuel injection system instead of slapping another carb on the air intake?

I thought it might only be a problem with carb equiped engines because they might be running wet valves and LPG would bugger them?

Dedicated gas,dual fual is a waste of time,it's a compromise - and you don't want to compromise fuel efficiency,that's what it's all about after all.25 years ago at the height of the gas boom I converted my HG Holden to CNG,this was a really good conversion and I did all the little tricks to get my power up on CNG,things you just didn't bother about with a customers car....so this was one of the better conversions around.We put it on the dyno and I was devistated to find I had a 25% drop in power on CNG - you can imagine the state of 90% of the conversions of that time.I didn't do many conversions,I specialised in tuning them - the conversion guys would just slam the conversion together,take the money and the owner drove away.Then they came to me to get it running right.

All the stories about dry fuels,valve and bearing problems were just what we call urban legends these days.Sure there were problems,no denying that - but gas wasn't the problem,it's a great fuel.

**Dooly** · 20th July 2006, 11:17

Originally Posted by Motu

the conversion guys would just slam the conversion together,take the money and the owner drove away.Then they came to me to get it running right.

Some yes.
Most of them seem to have long gone, well in my area anyway.

We've been doing conversions since the 70s when the old man was one of the first around doing them.
We also get a lot of LPG work related stuff from other garages who still seem mystified by it all.
Plus customers with their private cars.
Theres still shit loads of old Falcons/Holdens still chugging away on it.
You have to do the whole package, install, get it running sweet on it, iron out any bugs, and of course guarrantee it.
Mind you, today's EFI and electronic systems make tuning a breeze, if any needed at all.