LPG First Test on Nissan Terrano

My LPG system is on the SUV. It seems very smooth for the first test. Next step is "test drive on LPG"..

Category:

Howto & Style

Tags:

• Terrano
• Swa-Plasma
• LPG car
• Nissan Terrano

[vochitoken]

Hi there, some questions: Are you regulating thepropan flow with the ball valve? Is this truck carburated or fuel injected? in the later case, this setup can damage the injectors because they are running without fuel?

[revizal]

@vochitoken

I'm not regulating LPG with ball valve. The ball valve is only a choke to restrict LPG in best RPM. The main regulator is still the gas throttle valve on the carburetor. So this SUV is a carbureted vehicle. Thank you for your attention on this setup.

[vochitoken]

@revizal OK, so the amount of gas flow provided by the vapourize is fixed? I mean is there a flow control as a function of say the engine vacuum? Thanks for your time...

[revizal]

@vochitoken

Yes, the rate of LPG from the vapourizer is fixed. The flow control is the carburetor's throttle. I mean, the output LPG from the vapourizer goes to carburetor inlet, so the carburetor still function just like on gasoline system. The engine vacuum make the LPG suck in to the engine via the carburetor. That because of no modification on the carb.

[demios99]

Since I have LPG on my car for more than 4 years, this is what I can share with you:

1.If you can change the timing easily, do it ! Advance the timing from, for example 6*BTDC to 8*BTDC, in other words, LPG burns SLOWER than petrol, so the spark needs to occurre a little bit EARLIER. If you cannot advance the spark, use HHO, since it helps flame spreading.

2.Use one degree COLDER spark for example BPR6ES instead of BPR5ES. Because LPG burns hotter than Petrol.

3.Reduce spark plug gap to 0.7mm

[revizal]

@demios99

That's very helpful in improving my LPG car. Thank you very much. I just got about 15 km test drive on this system. The most different from gasoline system is the power and throttle response little bit lower than gasoline. But overall the system run very smooth on various RPM.

[novachevyguy]

steering wheel is on the wrong side

[demios99]

This is what I was being told - Have someone hold the engine fixed @3000 rpm, meanwhile you close the IDLE nob until the rpm drops (too LEAN mixture), then turn it the other way until it drops again (too RICH mix). Your ideal spot should be somewhere in between. But, since you have AFR gauge, you don't have that problem :D

[demios99]

@revizal

Main problem I encounter is different air temperature (density) which makes it difficult to find the right mixture.On idle,it's important to have smooth running, because it's a sign of good AFR. Idle rpm might be a bit higher, but that depends on the actual engine. 5-15% less power and 10-15% higher consumption is normal, but it's around 40-50% cheaper than gas. Good thing would be to have Vexus/Nexus installed because LPG requires higher energy levels to ignite - it has ~105 octanes

[revizal]

@d3adp001

Thank you. I hope I could get a bigger LPG tank for it and suitable LPG tank to fit on the car.