2Jz With Lpg, Anyone Done?

[JimSiam]

Thinking of replacing my engine with a 2JZ Toyota (3.0L twin turbo), but also want to take advantage of LPG, had a bit of a search on google and found this;"Jason's Ghiller's 4.0-litre turbocharged XE Falcon going 9.97 at 132mph. This is the first car in Australia to run a 9-second pass on LP Gas fuel."

Was wondering if anyone has done an LPG on a 2JZ, i don't want anything as extreme as 9 seconds, but it shows i guess anything is possible with LPG thesedays, also if anyone in Thailand would be capable of setting such a rig up?

[Dave the Dude]

A Thai friend of mine has an old truck with a 2JZ twin turbo running LPG. I think the work was done locally in Prasat,Isaan for around 70k.

Although I dont know details, thought Id just confirm its possible and been done.

[stingray]

2JZ is ok, Dont do with turbo. It's a nightmare. Will allwasys have troubles. 2JZ is fast enought. Better use 1UZ, instead of 2JZ turbo. Remember: There is no substitute for cubic inches. I had LPG in my car with 2JZ when i bought it and i ripped all off. Car didn't run good on benzene anymore, yes it runs, but how, hat troubles with sensors, fuel pump, gasoline tank sensor, air flow, TPS sensors, idle speed sensors, etc. Cost me 20 grand to make the engine running on benzene again. Had many cars with LPG. Most of them got problems. Sooner or later they fail all.

[JimSiam]

2JZ is ok, Dont do with turbo. It's a nightmare. Will allwasys have troubles. 2JZ is fast enought. Better use 1UZ, instead of 2JZ turbo. Remember: There is no substitute for cubic inches. I had LPG in my car with 2JZ when i bought it and i ripped all off. Car didn't run good on benzene anymore, yes it runs, but how, hat troubles with sensors, fuel pump, gasoline tank sensor, air flow, TPS sensors, idle speed sensors, etc. Cost me 20 grand to make the engine running on benzene again. Had many cars with LPG. Most of them got problems. Sooner or later they fail all.

hmmm, whats the problems with the turbos, i thought toyota has it pretty rock solid with the supra motor.

The 1uz does sound good, going from 2.0l to 4.0l can't really go wrong i guess, whats the gearbox that comes with them usually?

M20B20 - 95 kW (129 hp) @ 6000 164 N·m (120 ft·lbf) @ 4300

So the above original motor compared to the below Over double on both counts, there seem to be a few E34's already with them too, so they fit.

1UZ - 195 kW (261 hp) and torque of 363 N·m (268 lb·ft)

[BSJ]

hmmm, whats the problems with the turbos, i thought toyota has it pretty rock solid with the supra motor.

The 1UZ, and too a lesser degree, 2UZ motors are fine engines. They power a lot of modified or performance cars and off-road bush buggies in Oz. Genuine Toyota turbos on various models can be problematic....but that's often because they are abused or over used!

Supercharging or twin turboing a 1UZ is still the best way to go....but if your using a truck for bush bashing a 2UZ would be fine if a little heavier.

Soarers (Lexus SC300) with the twin turbos often had turbo failure.....and a single larger turbo fitted as a replacement.

A friend with a Celsior (1UZ engine) running on LP gas has now done 40k without any trouble.

The OP was talking 2JZ.....so how come we talking V8's!

There are a lot of good Supra's here running 2JZ turbo engines with reliability and oodles of power. A 2JZ can be modified to hel_l and back!

[JimSiam]

Haven't got the motor yet, it was top of the list till I posted here, now I have to consider what is better.

[stingray]

Haven't got the motor yet, it was top of the list till I posted here, now I have to consider what is better.

2JZ in compare 1 UZ fro my expirience:

2 JZ's are trouble free and easy installation. Have a 2JZ in one of my american cars for years and never had any problem, expept the alternator and one speed sensor i have to replace once. First when i bought this car i want change back to a original V8, but i drove it for a while and i can say tat the power is almost the same as the original 350 cubic inches V8, exept on redlights it start moves a little bit slower, because it doesn't have so much torque. What i miss is the V8 sound on that car. But once the car is in move there is no power loss, specially when u use the kick down to accelerate. Topspeed is 185'km/h on my 2 tonnes oldsmobile and i think thats quite good. There are 4 speed and 2 overdive, so it's actually like 6 speed and the rpm are 1800 at speed of 140 km'h. so it runs very economical at highways.

I have another Oldsmobile with a 1UZ V8 installed and of corse acceleration and torque is much better (if all the electronics are installed correctly) but Top speed is about the same. Fuel economy is about 10% better on 1JZ, than 1 UZ, but thats not important for me, just for information. 1 UZ is a lot if electronic controlled, so there is the mainthing to find a good electronic guy who can install all good and in time. Most of the electronic guys don't know how to install a 1UZ,

Both engines have OBD 1 DLC Port, so there are possibilities to scan the installed engine for troubles. Make sure you get a qualified electronic guy whe keeps the DLC port connected. Mosthly they like to disconnect some wirings that you are not beable to use a scantool, so you allways depend on those electronic guys. They try to make you come back allways so they can charge you money again. I don't say all mecanics are like this, but this was my expirience.

The eletronic wiring instalaltion is very important, with both engines. For example faulty speed sensors, oxigen sensor or wiring damages can causing low power and faulty gearshifting. Therefore it's important to find the right guy, who do the electronic. For 1 UZ, Download yourself a wiring diagramm from www.lextreme.com

[JimSiam]

Thats great info, thanks

looks pretty full under the bonnet with one in there, i do like the hydraulic cooling fan

[JimSiam]

Well the EBC disty Gavin has thrown a completely different option, M60MB40 4.0L BMW v8, bolts straight in, no cutting or welding, donk and sludge box can be got with accessories for just on 50k! what a bargain, sounds like the best way to go so far with similar power and torque to the 1UZ and less muckin around to slot the lump in, I can smell that rubber burning already.

[steelepulse]

That 4. litre BMW engine does sound like quite a bargin. I had inquired about one and the number given to me was much higher.

[Murf]

I used to have a 1J running LPG too, no problems. It was the vacuum type LPG system.

If you were going to fit LPG to a turbo i would imagine that you would need to fit the injection LPG system and let someone who knows what they are doing set it up, so the engine doesn't detonate.

[JimSiam]

An interesting article on LPG

Can Turbocharged and Supercharged engines be converted?

Yes they can, and very well if the job is done properly.

BUT! If the correct type of conversion equipment is not used the vehicle could be extremely dangerous..........

Open and Closed Loop single inductive mixer equipment is NOT suitable for the Conversion of any Turbocharged or Supercharged engine.

Read thorugh the description of both Open and Closed loop single mixer conversions to understand backfiring and is causes, then multiply the effect by the power of at least 6 for the gas capacity of the inside of the Supercharger, then you'll see why such an event would be very memorable indeed.

We are not speaking of a friendly little pop now and again, more like an eventual (inevitable) explosion of large enough magnitude to take the Bonnet (and maybe even the Driver) with it.

That isn't the only risk either - Putting LPG vapour through a Supercharger will tend to dry out any lubricant in the rotor bearings which will end in Supercharger seizure sometime down the line. If such siezure does occur, it might just result in the snapping of the drive belt and a hefty bill for a new Supercharger unit. It could also result in a bill for a new engine if any broken Supercharger fragments are inducted.

Correct Conversion

For clarity, the only way a Turbocharged or Supercharged engine can be converted properly (safely) is by using a correctly selected and installed multi point injection system. When this is done there will be no risk of backfiring nor any damage to rotor bearings as the inlet manifold (and the Turbo or Supercharger unit) will only contain Air - Just they do when running on petrol.

[INTJ]

I just replaced an A/C compressor on 1UZ - cost 1500 baht for the part.

Price that up for the M60.....also read up on the Nikasil issue...M60B44 is a better bet... 50K is a good price though.

I also bought a 1JZ VVTi motor (complete with box, ECU etc) only 15,000 baht - petrol engines are very cheap at the moment (Chieng Kong Bang Na).

Cheers