Advice for ‘Dual Fuel’ 60 series with 2F motor re: Morey’s & motor setups

We have a gas GQ Patrol and not had it long either, so i would be interested to hear replies. I have a gas head on the motor and 9.5mm leads. The more spark the better for gas. Have also replaced coil with a GT-40 for same reason. How big is your gas tank and how many k"s do you get?

The Brewman

We have a gas GQ Patrol and not had it long either, so i would be interested to hear replies. I have a gas head on the motor and 9.5mm leads. The more spark the better for gas. Have also replaced coil with a GT-40 for same reason. How big is your gas tank and how many k"s do you get?

The Brewman

We have a gas GQ Patrol and not had it long either, so i would be interested to hear replies. I have a gas head on the motor and 9.5mm leads. The more spark the better for gas. Have also replaced coil with a GT-40 for same reason. How big is your gas tank and how many k"s do you get?

The Brewman

I had a 1984 troopie petrol & converted it to lpg. Burnt out the valves very quickly indeed even tho it was a very good conversion.
Afterwards had the head done for gas & 50thou was planed off to raise compression, & some porting.
Distrubtor had a cam with longer dwell I think & revamped advance &
timing maybe advanced too.After that it felt like a 6cyl sedan on the hills
but the rings collapsed at about 80,000 kms. Appears that motor with
only a 4sp box revved a bit & the soft rings were not up to the task, a not
uncommon problem I was told later.Shouldnt be so with your 2F but at 250,000
too much tuning may shorten its life.

I had a 1984 troopie petrol & converted it to lpg. Burnt out the valves very quickly indeed even tho it was a very good conversion.
Afterwards had the head done for gas & 50thou was planed off to raise compression, & some porting.
Distrubtor had a cam with longer dwell I think & revamped advance &
timing maybe advanced too.After that it felt like a 6cyl sedan on the hills
but the rings collapsed at about 80,000 kms. Appears that motor with
only a 4sp box revved a bit & the soft rings were not up to the task, a not
uncommon problem I was told later.Shouldnt be so with your 2F but at 250,000
too much tuning may shorten its life.

LPG has a very high Octane rating, well over 100 and therefore requires a big fat spark to ignite it. Good quality leads and plugs are essential.

Jim.

Yes LPG octane is over 100 thus you can advance the timing to suit BUT remember if you go back on normal unleaded or super the timing will be to far advanced and thus the engine will ping its head off not good. S you may have to back the timing down again. There is a mob that make's an in cab timing adjustment kit for this purpose and I think it is marketed by Crane Pty Ltd ( the same mob that make's high performance parts ).

Rossco

Rowan,

Rowan,
I too have a fj 60 duel fuel, when I first bought it it would backfire on gas and at one stage blew the mixer in two!! I put a unifilter, snorkel and extractors to try and increase economy, unfortunately it is difficult they are heavy beasts! I would suggest the you have the carby reconditioned I used a company in Preston Melbourne called Muller & Jacka they did an excellent job. As I live outside of Melbourne I fitted the carby and took the fj60 to Muller & Jacka where they checked the fuel air ratio on both gas and petrol to ensure accurate mixture it now runs very good on both fuels., it costs about $250 but well worth it. Just a couple of points:
1/ make sure your timing is correct mine has a habit of wearing the rubbing block.
2/ make sure the valves are adjusted correctly.
3/ Drive at around 100 kmh this gives a good ecconomy I get around 15 lt per 100km on petrol and approx 19lt /100 on gas.
I would be careful putting a gt 40 or any other 12 volt coil on as the fj use a ballast resistor to drop the voltage down to approx 8.5 volts ( the ballast resistor is taken out of the circuit when starting so the coil gets a full 12 volt, then once the key is released the ballast is put back into the circuit ) I would think if you did take outthe ballast you me burn out points more regularly.
The next think I am looking at is electronic ignition, there is a product that replaces the points and can handle up to 16 volts
The only problem I have with duel fuel is that you need to run it on petrol or at leaast let it sit o/night with petrol in the carby, this will lubricate the accelerator pump leather cup if you do keep it lubricated it wears down and you will not be able to run on petrol ( a new pump plunger costs around $25 and are not that easy to get)
Good luck if you need any further info email me direct
Regards stocksy
astocks@ncable.net.au

PS my FJ has clocked 386,000km on the original motor, it has had the head recoed twice and does not burn oil!!
sorry about the previous response still getting the hang of this!!!