Liquid Gold

[Redback]

melbourne based companey has just patened a direct injection gas system... with really impressive results.. betwr milage and in some cases better power.. and suites turbo cars as it raises octane and therefor you can increase compression... ill find the website... but i look inpressive and im going for the full conversion. re places teh mixers and directly injects LPG liquid into the cylinder rather then being mixed throught the intake....

heres the link http://www.lpgli.com/lpg.html

good reports off some of the Lexus guys that were testing it. 700hp forced induction 1UZs running on LPG..... no issues at all.

[GD2ILA]

you will notice a difference, albeit slight, if you DON'T run your fuel down. You get more bang for buck (more fuel, less fumes, i know, sounds silly) on the refil if you fill from halfway.

I did some testing, filling from halfway i can get about ~20km more out of tank, compared to filling from empty. Nominal, but still an improvement nonetheless.

So you're best off getting to halfway then filling up.

Obviously tyre pressures and driving style are going to help further still, and all that jazz

G2DILA: Pump tyres to 38-40psi. (Buy a $5 pen tyre pressure tester to check this regularly).

Try and fill from halfway if possible. Regular oil changes with something around the 0w30, 0w40, 5w30 with a group 4 or higher Synth oil. (Filter as well)

As people have said, fill on Tuesdays, wednesday mornings. There are also some arguments for filling up early morning, late evening as again, there are less fumes (less servo traffic, less fuel being moved about), petrol has settled.

If you have an aftermarket comptuer, get someone like Ben @ Racepace to check everything, make sure it's not running silly rich. Check spark plugs as well, maybe even upgrade coil packs.

If you don't have an aftermarket computer, still not a bad idea to throw the car on a dyno to check to see how the ratios are going

But i suppose mostly it comes down to the right foot, choosing gears, etc..

take PT if possible I've switched to PT for my weekday shifts at work

My car's misfiring so my gear changes are very early and extremely light footed but that'll be fixed tomorrow. i have 275/30 19 so max pressure i pump is 34 on all four corners and i check em once a week. i pump every 2-3 days so can't really wait till it's cheaper, just pump when i need to. PT haven't done that in about 8 years, plus i live in Nottinghill and work in Altona. the closes bus stop is about 20min walk away so basicaly i have to drive. thanks for trying help anyways .

[SS8_Gohan]

dude, 34 is waaaaay too low, especially for such low profile tyres. I would be at 40psi all day, every day with such low profile. My 265/35's all round are constantly 40psi, i would be AT LEAST that for 19's with 30 profile.

More contact patch with the road, better economy, better wet performance, slower head build up in side wall with constant cornering, and longer tyre life. It's win, win, win. 34psi on 30 profile tyres is silly, seriously

[FATGTS-R]

I would of thought there would be a "slight" gain in economy if tank was kept lower rather that at full as the car would be lighter..

I understand the fumes theory, but our cars have a sealed fuel system. i.e any fumes are taken to the charcoal canister and used anyways?

I read somewhere about filling up in the early morning as the fuel is cold and denser, meaning more goes in but surely the pumps are temp compensated?

[Ruffels]

i'm pretty sure you LOSE power when you go to gas

Depends what sort of gas system your talking about...

- old style using a mixer and converter you do generally loose power although the impco kits are pretty good

- Current vapour injected gas the losses are very minimal, almost unnoticeable

where as what i think he is referring to when he says extra power is the new liquid gas injection systems that are becoming available on the market, however i wouldnt go near them for a couple of years as the technology is barely tried and tested!

but gas being a higher octane rating, dedicated liquid gas injection with a computer tune to match will bring higher power levels at a lower running cost then petrol!

[some_cs_student]

I read somewhere about filling up in the early morning as the fuel is cold and denser, meaning more goes in but surely the pumps are temp compensated?

There was another post after that quoting Caltex that there was a new temperature thing that takes into account temperature in March or similar....so different time of the day shouldn't make much difference.

[arep3]

am i showing my age? i remember when fuel was like 60c a litre...

[khunjeng]

am i showing my age? i remember when fuel was like 60c a litre...

i remember filling up the old mans newly imported Bronco back in 1990 from the states for 9c per litre on LPG - it was like $10 for 120l!

[sloutch]

am i showing my age? i remember when fuel was like 60c a litre...

Probably you are just having a long nap. It's 2008 July, wakey wakey.

[DogKnight]

If you are using a system that uses both gas and fuel you usually loose some power.

If you switch to one of the newer systems, those that actually completely replace the petrol system with gas including injectors and everything, can actually produce more power.

My friend whom is a mechanic informed hs garage had a day where they were promoting LPG gas around christmas time. The company doing the gas conversion actually had a skyline that they had done a full conversion on and supposedly put out more power than beforehand without any other mods. Meant to be because of the higher octane of gas and the compression you can set.

[Redback]

the liquid injection system has been tested from what i read... no perfected. but ill be witch as soon as it available.... my 1UZ in renound for it reliability strenth ect so putting it through trial and error shouldnt be a big deal... plus witht he higher octane rating and cooler intake temp from the liquid gas i should have fewer issues with the super charger kit. or mite evel sell that off for a Twin turbo setup....

[Modena]

i just fueled up with BP Ultimate AUD 1.87 a liter , now that hurts . my gtr is my daily driver so i fuel up full tant every 3 days. the price we pay for performance .

Your literally throwing money out the window every time you drive...

Sell it or buy a cheap daily and keep the GTR for the weekends.

[eMsta]

the paper said today that in 10 years petrol will be 8/ltr

[madbung]

When i had my first mini-bike I could put 30 cents worth of regular in @ 8 cents per litre (super cost more) and ride all day, not to mention you could ride the bike to the servo and back without fear.

No i'm not 80yrs old...that was about 1974-5.

[Redback]

i rember putting 10bucks worth of optimax in my 33 for less then 80c per letre. and getting some good milage.

[GD2ILA]

huh!!! just biiitcchhhh to management and walked out with a company petrol card only bad thing i can only fill up at BP. but at least it's FREE.

[SS8_Gohan]

^ dude, what have you been filling up with. You SHOULD be filling up with BP Ultimate

[Do-Luck]

Filled up my Fairlane for $110.00 today

[arep3]

Rebuild should be finished fairly soon. im looking forward to getting my car back but not looking forward to putting fuel in it.

[Modena]

Filled up my Fairlane for $110.00 today

You drive two fuel thirsty cars... why? lol