Thread: More Power With LPG

My (six banger) Fairlane is factory LPG/ULP, I can't detect any performance differences but it runs smoother on gas. I get 11.4 L/100km (24mpg) as opposed to 22mpg from the 3.9 Disco.

most of the cars Ive owned used slightly more gas by liters. often only 0.?L/100. science shows it should be 15% more by liters.


If you loaded the car with people or trailer the gas consumption increased heaps. so you swap back to petrol o hills ect.


Ive got a BFII E gas and the engine feels detuned-to get you to buy a petrol.
10.5-13.6 range the injected gas BF is useless wheel spinner that drinks so much and cant drive to get it economical.


P76 6 and V8 and sigma/magna, blue and black holden and CA20 bluebird.
all had good gas power-fuel economy.


my starfire VH commodore [4 cyl 4 speed manual] developed 55 RWBP on petrol before conversion and 90 RWHP after,with a bit of tickering it could have been a race car.

Our latest vans have gas injection,they are fantastic,still slightly less power than fuel,but economy is better than any other system we have ever had.

The vans weigh around 2.8t,they loaded all the time,ladders on roof as well, and we still manage 14/15 l/100 around town,which is pretty good.On a run will do 13's easily,as long as speed is not over 100k's.

Not bad for a brick on wheels.
And have had no issues so far,some have done around 160K.

Originally Posted by Davehoos

Ive got a BFII E gas and the engine feels detuned-to get you to buy a petrol.
10.5-13.6 range the injected gas BF is useless wheel spinner that drinks so much and cant drive to get it economical.


my starfire VH commodore [4 cyl 4 speed manual] developed 55 RWBP on petrol before conversion and 90 RWHP after,with a bit of tickering it could have been a race car.

A BF egas does not have injected gas. It uses the old school gas vapour ring which is why they are lower on power (34 Kw less) to same petrol.
engine.

As for your VH misfire engine. This was a mid 80's car and I would assume that the LPG was done using the same technology as as the above Falcon. This being the case it is impossible to have a power increase.

If Ford could not do it 20years later, I don't see how any one else could.

The only reason my new conversion has an increase in power is due to it being liquid injection. Squirting cold liquid gas almost at the intake valve cools the incoming air, having a similar effect as an intercooler.

Combine this with LPG being much higher octane than petrol, the ECU's can advance timing much further than petrol.

Even the still used vapour injection only offer performance to match petrol, not better it.

V8 Ian. You must have Tickford gas, as Ford did not have any factory duel fuel vehicles.

Originally Posted by Mr Whippy

V8 Ian. You must have Tickford gas, as Ford did not have any factory duel fuel vehicles.

Good chance, I assumed factory only because of the integration of the switching in the dash and the fuel gauge's ability to measure LPG and ULP, dependant upon the fuel selected.

Vapour LPG injection can match liquid injection for power so long as you add a percentage of petrol under load. Dead easy if your software allows it. I've seen the dyno results from a Skyline turbo I converted. Unlike liquid injection you can use old style LPG tanks, used tanks, dual tanks etc and the injector placement is far less critical.

Advanced technology is wunderbar so long as it keeps going....

Originally Posted by V8Ian

Good chance, I assumed factory only because of the integration of the switching in the dash and the fuel gauge's ability to measure LPG and ULP, dependant upon the fuel selected.

I am guessing you have an NF or NL. Our old car(the one I drove to Darwin for my son) is an NL with Tickford gas and yes the fuel gauge is integrated with the petrol gauge and the gas/petrol switch is where the door lock button was.

So it is sort of factory, not fitted on the assembly line but by Tickford when new. Ian, if you have a look at the LPG compliance plate under the bonnet it will say Tickford where as the plate on my sons BF Egas says Ford Motor Company

1984 1.9 holden in NSW is ADR27C to get them to pass they detuned to crap out of them. gas vapour ring dual fuel-to pass emission for petrol the gas side has to be derated. lean burn engines love the dry fuel and often you get more power from the hotter burn.


the rules are that in OZ you have to pass emisions for both fuels if it is dual fuel. not test using both fuels as a system.IE limp home and max poer petrol on a gas engine.


Pre FG falcon gas only was detuned factory to suit standardisation with dual fuel models.




LPG in NSW is 91 octane.


I ment FG for direct iquid injection. as we have a few factory utes and yes they make loads of unusable power and are heavy on fuel.its obvious its a looks good on paper thing.

BF11 is vapour ring with a fixed mixture convertor almost the same as the dual fuel..But its also a twin cam multi valve fly by wire job.I also own several AU with the same tickford unit not much more power.


My BF11 egas wagon is a 4 speed auto XT 3,23 final drive.
replacing the factory presset convertor with a cheep nasty adjustable will more likely get more than 34 KW back.


most of the AU/BA/BF sold around here get dealer fitted vapour injection.
they have the auto changeover system, My neighbour had his AU11 fitted at ford dealer as a ford package, the package is insurance for engine damage basically. It will switch back to petrol on high demand and even sitting a traffic lights to reduce the chance of back fire.. very good reliable unit.