924Board.org

Nobbi · Joined: 24 Aug 2006 Posts: 1398 Location: Germany

Bravo Khal!

Nice find,i am sure you safed that one for a rainy day!

I am ready for a Warsteiner, see ya tomorrow mate!

Nobbi

miniver · Joined: 21 Jul 2007 Posts: 11 Location: Lodz, Poland

Hi everyone - my first post on this forum, so hi...

LPG is very popular here in Poland because it's half the price of petrol. Some people have it in their 924's - apparently the K-Jetronic works fine with LPG. As for the effect on the engine - if it's the right system and it's properly installed, it should not be harmful to the engine. LPG is not right for racing, though.

But as someone said before: "it just doesn't feel right" to have a sports car like the 924 run on LPG. My 924 is very economical with petrol anyway - there's always something wrong with it and most of the time I can't drive it so I don't spend much on petrol...

Nobbi · Joined: 24 Aug 2006 Posts: 1398 Location: Germany

miniver,

here in germany a lot of people driving to poland for the lpg installation,cause it much cheaper!? Do you now approx. prices?

Nobbi

morghen · Joined: 21 Jan 2005 Posts: 9102 Location: Romania

miniver · Joined: 21 Jul 2007 Posts: 11 Location: Lodz, Poland

Nobbi · Joined: 24 Aug 2006 Posts: 1398 Location: Germany

danke !

Nobbi

sleepy · Joined: 29 Nov 2004 Posts: 63 Location: UK

i'v a laguna with an lpg system done in poland. it's got a burnt exhaust valve now because lpg burns so hot & i'm looking for another engine because its cheaper than having the head removed, skimmed, new bits etc

.
lpg may be half the price of petrol but you loose 15% power & fuel efficiency. You need to do a lot of miles to make lpg pay off. & if ur unlucky enough to something go wrong its not a cheap thing to have serviced.
_________________
meteor silver 1981 924 lux. -UK

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

Most of the heads I get at my work (rebuilding shop) are LPG heads.

valve seats which are, how do you call it... anyway...they got some sort of edge because the valve is slammed to the seat, which makes the valve go deeper into the head, which decreases the valve clearance which causes burnt valves.

yeah

that's how it works.

I've put (=am still putting) a lot of money in my MS system, but suddenly LPG still seems a nice option (overhere, you pay more taxes with LPG, but since my 924 is a classic, I don't pay nothing (ok... I don't pay anything... just want to sound black).
So, all my costs stay the same, but my fuelcosts will be 1/3 of the normal (cuz I need 98 RON).
Turns out LPG has a higher octane level, which is nice with my raised compression.

Let's say I can build LPG in for 1000 eur. Fuelprice is 1,50 eur/litre. Let's say the porsche does 1 liter on 15km (if I'm very lucky).
That means every km costs 10ct. With LPG the consumption is higher. Let's say it does half...60ct for a litre LPG, 8km on a litre = 7,5ct/litre.
Saves 2,5ct /km. On 10000km a year thats 250 eur. I need 40000km to get my investment back, but in 40000km my engine has suffered from the gas.

Conclusion... probably not

I'll calculate again... I should save more than 2,5ct/km.
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

Mike924 · Joined: 12 Aug 2004 Posts: 2601 Location: IoW UK

Does Magasquirt have an LPG setting, Martijnus?

_________________
1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd

'There is no substitute for a little grease under your fingernails.' - Chrenan, 924board.org

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

I guess it has... some guy I know has a beretta that runs on LPG and MS...

I've been thinking....and I'm probably going to convert to LPG

the euro 98 fuel is way too expensive... and since LPG has a higher octane level I guess my engine could run better on lpg.

The liquid petrol injection LPI appears to have almost as much power as regular gasoline and can be controlled with ms.

I've estimated the price for conversion parts at 500eur which means that in 5000km I've earned my money back. The problem is that my car papers have to be adjusted to mention the LPG... that means I have to use qualified parts which are expensive... but it can all be done... if i don't buy everything new...
first I'll let it run on normal fuel... for the break in period.
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

Cedric · Joined: 27 Aug 2004 Posts: 2831 Location: Sweden

Over here we have ethanol, E85 everywhere. I know a guy who adjusted his kjet and it worked fine. Its an option, but i dont know how much e85 tou have down there in germany..
_________________
1980 924 Turbo
www.instagram.com/garagecedric/

Rich H · Posted: Mon Feb 25, 2008 9:36 am Post subject:

MS does not have a setting as such, its totally flexible, you can specify everything you want! This can be done by setting 2 maps and switching between them LPG/petrol. It should be easy enough to get a map sorted, the higher octane will mean you can run a lot more advance. Stoich for LPG is 15.5:1 so you will need to run a bit richer, but not a lot (Petrol is 14.7:1) More advance will mean a bit more power so you will probably achieve the same economy.

R
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

Martijnus · Joined: 29 Dec 2006 Posts: 2019 Location: Netherlands

isuras2 · Joined: 17 Jun 2005 Posts: 458 Location: Phoenix, AZ

I don't know about the 924, but my father has a Chevrolet 1978/1979 pickup truck that runs on propane. In the US, it used to be about half of gasoline, but now it is about the same. The engine is carbureted and has a few extra things, but runs better on LPG. The first engine would still be there, but apparently they don't like to go about 80 mph in 2nd gear (truck has 3 gears) and the engine overheated. LPG burns cleaner than gasoline. The truck has both gasoline and LPG with some wiring to a 3 way switch. I would be a little hesitant with ethanol due to its corrosive properties when it is in plastics, which my 924 has.
_________________
Rob
'80 931 (sold)
'80 924 NA (sold)
Former Omaha Crew

Rich H · Posted: Mon Feb 25, 2008 5:57 pm Post subject:

I'm interested again as I'm looking at ITBs which have injector ports but my fuel rail is bolted to the head and using the original injector ports, so a second set of injectors could be fitted easily. Will an normal petrol injector work with vapourised LPG or is that silly?
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec