I drive a carby TB42 duel/fuel, about 6 months ago i had the head done, since getting it back, I was lucky to get 300km to 90ltr's of gas, pre head I was getting 420-430, I've put in new plugs, cap, rotor, points adjusted the tappets all to 15 thou, also took it in to a gas place for a tune, after the gas tune I was able to get 330km to a tank but still 100km short of what I used to get.
It's a stock auto patrol, with standard road 31's and no lift
Any ideas ? I haven't checked the timing yet, also the car does have a slight miss.
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TB42 Fuel Economy
economy
similar story fella
My TB42 Shorty (auto) was getting according to my girlfriend 360kms till the red, so being conservative there is an easy 40kms left, thats 400kms to 85lt gas. At this time it was out of tune, cracked head and crap leads. As you can imagine having spent a fair wack of cash fixing stuff of late I was hoping for better or similar economy.
Now only I drive it and very gently might I add (just so I can see what economy is like) I get on average 380km to spluttering then switch to petrol. Even with 33's i am getting in reality about 420kms as im covering more distance with every revolution.
I took it down to LPGAS-1 in lillydale and they wouldnt dyno it as they said the valves were not adjusted correctly, I took it home and checked again and they were spot on, so dunno what they were talking about. I got the extended rotor button from Performance ignitions in Nunnawading 30$ and the missing at idle has stopped.
I want to know if anyone has experimented with the valve clearances for LPG I would assume they would be just fine at factory specs.
At the end of the day Im still getting alot of kays for my money but even on this forum some guys claim up to 550kms on 85lt which has me wondering??????????
cheers brunsy
Ps any more than 11 deg BTDC and it pings on petrol so leave it at 10, thats what i found anyway. Gas however loved 15 deg BTDC, ran sweet.
My TB42 Shorty (auto) was getting according to my girlfriend 360kms till the red, so being conservative there is an easy 40kms left, thats 400kms to 85lt gas. At this time it was out of tune, cracked head and crap leads. As you can imagine having spent a fair wack of cash fixing stuff of late I was hoping for better or similar economy.
Now only I drive it and very gently might I add (just so I can see what economy is like) I get on average 380km to spluttering then switch to petrol. Even with 33's i am getting in reality about 420kms as im covering more distance with every revolution.
I took it down to LPGAS-1 in lillydale and they wouldnt dyno it as they said the valves were not adjusted correctly, I took it home and checked again and they were spot on, so dunno what they were talking about. I got the extended rotor button from Performance ignitions in Nunnawading 30$ and the missing at idle has stopped.
I want to know if anyone has experimented with the valve clearances for LPG I would assume they would be just fine at factory specs.
At the end of the day Im still getting alot of kays for my money but even on this forum some guys claim up to 550kms on 85lt which has me wondering??????????
cheers brunsy
Ps any more than 11 deg BTDC and it pings on petrol so leave it at 10, thats what i found anyway. Gas however loved 15 deg BTDC, ran sweet.
GU TB45 tractor
Brunsy, the place that did my head said go a tad bigger on clearances when fitted with lpg as engine runs a little hotter. A few people have told me this since too. You could also leave timing at 15deg and leave a little Premium in tank for when needed. Performance Ignition Services, ICE and the LPG guru I use all said leave the timing as per factory unless it is regraphed, then they will tell you where to set it to suit. Also, how did LPGAS-1 know about the clearances?
A TB42 on LPG can be econolical
I did my head on my patrol, Had new valves and stems all done at the same time while having a shave done to bring the compression ration from 8.3:1 to around 8.72:1 give or take
I get 450-500K's city driving if i don't hammer the engine down and on the freeway i can get 700K's without a fuel stop
I have 2.5" extractors and exhause, Elect Ignition system and have good quality LPG low resistance leads and plugs (not NGK but some rather odd ones that you can only get from Toyota that are used in the Hilux and Landcruiser LPG setups)
LPG is a harder system to maintain than petrol but if done right you get some serious benifits. Doing the shave on the head brought hte power up on the LPG side, not as happy with petrol unfortunatly (running premium still causes huge pre-ignition) but i ain't worried, LPG is cheaper then petrol
I did my head on my patrol, Had new valves and stems all done at the same time while having a shave done to bring the compression ration from 8.3:1 to around 8.72:1 give or take
I get 450-500K's city driving if i don't hammer the engine down and on the freeway i can get 700K's without a fuel stop
I have 2.5" extractors and exhause, Elect Ignition system and have good quality LPG low resistance leads and plugs (not NGK but some rather odd ones that you can only get from Toyota that are used in the Hilux and Landcruiser LPG setups)
LPG is a harder system to maintain than petrol but if done right you get some serious benifits. Doing the shave on the head brought hte power up on the LPG side, not as happy with petrol unfortunatly (running premium still causes huge pre-ignition) but i ain't worried, LPG is cheaper then petrol
AA's for Quitters
Temporary Australian
Better make that x3.bilby wrote:yep x2RoeDao wrote:the oil companies love me..... my TB42 gets about 23 litres per 100 kilometres..... on the HIGHWAY!!!that's petrol carby model....
I just drained my gas all the way (it wouldnt accllerate at all). And with the auto I got 375km out of 90lts (24lts/100km) and that is all highway.
THOUGHT FOR THE DAY....
Just a tip, "draining your tank all the way" is not the best way to test your fuel usage. It could start spluttering/losing power with an unknown number of litres left in the tank.
Do it like this.
Fill up at service station X. Set your trip meter to zero and start driving. Next time you fill up, do so at the same pump if you can. How many litres does it take? This is the number of litres you used since you last filled up.
Now take the number of litres, divide by kms on your trip meter, and multiply by 100. That is the number of litres per 100 km you used.
All these "me toos" are useless if everyone is using a different inaccurate way of working it out!
Jason
Do it like this.
Fill up at service station X. Set your trip meter to zero and start driving. Next time you fill up, do so at the same pump if you can. How many litres does it take? This is the number of litres you used since you last filled up.
Now take the number of litres, divide by kms on your trip meter, and multiply by 100. That is the number of litres per 100 km you used.
All these "me toos" are useless if everyone is using a different inaccurate way of working it out!
Jason
This is not legal advice.
Jason.
Thats the way I worked it out. Filled up in Melb on sunday. Then on the way to the servo yesterday it spluttered. I had done 375km and it took 90lt (which has me thinking as I thought it was only a 80lt useable tank).
So that works out to be-
kms/L=4.166666666666667
MPG=11.775362318840578
L/100km=24
Makes me want my diesel back. Even if it did go slower.
Thats the way I worked it out. Filled up in Melb on sunday. Then on the way to the servo yesterday it spluttered. I had done 375km and it took 90lt (which has me thinking as I thought it was only a 80lt useable tank).
So that works out to be-
kms/L=4.166666666666667
MPG=11.775362318840578
L/100km=24
Makes me want my diesel back. Even if it did go slower.
THOUGHT FOR THE DAY....
Not including service costs.chimpboy wrote:Does it work out more expensive than the diesel, or does it use more litres and less dollars?turps wrote: Makes me want my diesel back. Even if it did go slower.
Gas works out cheaper to run the car on. As I get 23-24litres/100km, where as my TD42 with 33's used to constantly get 12-13litres/100km. So cost wise between Gas and diesel, gas is the winner. But since I put about 20-30lts of pULP through it every couple of tanks. So far Its about the same cost wise for Petrol/gas compared to Diesel.
THOUGHT FOR THE DAY....
I've finally got some stats on the Maverick's fuel consumption on gas, with the 33" x 12.5" MTRs and 80mm suspension lift. Also with roofrack in case anyone thinks that matters. Manual.
Roughly 60% highway 40% town driving, 28 litres/100km. Relatively hilly driving for these figures.
That included driving through a speedo calibration checkpoint on the Princes Freeway, so it's not thrown out by tyre size.
This is an 88 Mav that hasn't had a tune up in at least a year. It's also idling around 1100rpm at the moment so I imagine there is some room for improvement. Anyway, this result contains no dodgy estimates, only firm figures so I thought I'd share them. Unfortunately I never checked the mileage when it was still on stock suspension and 31" ATs.
I'll be doing new spark plugs soon and I might do a compression test at the same time, could be interesting. We're reaching a point where squeezing a few % of fuel economy could be worth a bit of time and effort I guess.
Jason[/b]
Roughly 60% highway 40% town driving, 28 litres/100km. Relatively hilly driving for these figures.
That included driving through a speedo calibration checkpoint on the Princes Freeway, so it's not thrown out by tyre size.
This is an 88 Mav that hasn't had a tune up in at least a year. It's also idling around 1100rpm at the moment so I imagine there is some room for improvement. Anyway, this result contains no dodgy estimates, only firm figures so I thought I'd share them. Unfortunately I never checked the mileage when it was still on stock suspension and 31" ATs.
I'll be doing new spark plugs soon and I might do a compression test at the same time, could be interesting. We're reaching a point where squeezing a few % of fuel economy could be worth a bit of time and effort I guess.
Jason[/b]
This is not legal advice.
more grunt
Im embarking on a turbo conversion still retaining LPG p**sing the ULP off, still collecting all the bits but looks like its gonna be a very cheap conversion. Ive turbo'd a few vehicles but never on LPG but why the hell not? Looking forward to posting some pics and numbers.
GU TB45 tractor
Yes I believe the roof rack makes a big difference, try removing it and see how you go.chimpboy wrote:I've finally got some stats on the Maverick's fuel consumption on gas, with the 33" x 12.5" MTRs and 80mm suspension lift. Also with roofrack in case anyone thinks that matters. Manual.
Roughly 60% highway 40% town driving, 28 litres/100km. Relatively hilly driving for these figures.
That included driving through a speedo calibration checkpoint on the Princes Freeway, so it's not thrown out by tyre size.
This is an 88 Mav that hasn't had a tune up in at least a year. It's also idling around 1100rpm at the moment so I imagine there is some room for improvement. Anyway, this result contains no dodgy estimates, only firm figures so I thought I'd share them. Unfortunately I never checked the mileage when it was still on stock suspension and 31" ATs.
I'll be doing new spark plugs soon and I might do a compression test at the same time, could be interesting. We're reaching a point where squeezing a few % of fuel economy could be worth a bit of time and effort I guess.
Jason[/b]
TD 80 Series, F&R Lockers, Winch etc
The best economy I've ever had out of my TB42e is about 350ks to 90l useable, I now get 330ks to 90l and have for a long time now. I've heard of others getting around 380-420,ect and so i rang lpg1 and asked how far i should expect to get. The answer i got was around 330km.
I drive pretty hard (don't misinterpret as fast) but even when driving like Miss Daisy for experiment mileage didn't improve much. Not 420ks anyway.
If anyone knows how to improve economy of these engines let us know 'cos I've been wanting to put it on straight gas but range is shite(330km)
I drive pretty hard (don't misinterpret as fast) but even when driving like Miss Daisy for experiment mileage didn't improve much. Not 420ks anyway.
If anyone knows how to improve economy of these engines let us know 'cos I've been wanting to put it on straight gas but range is shite(330km)
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Premiers 1999, 2007, 2009
Spoon 2010
Premiers 1999, 2007, 2009
Spoon 2010
A speed camera would have prevented that!
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