by toyboata on Sat, 07 Apr 2012 9:11 +0000
Ok after nearly 2 years with my Lux I've finally gotten round to fitting LPG injection to it. I was waiting for a PRINS DIESELBLEND system to be released here but it is still at least another year away.
I do however have another new system that has just been released.
PEEL Instruments have been manufacturing LPG electronics for about 25 years and have just released a true electronic LPG injection system for ALL diesel vehicles.
They make the brains of the system and then it's coupled with one of a couple of different converters and injectors. The one I have uses an EMER converter and injector, which have a reputation for being very reliable.
The system has one major advantage over others on the market and like with ChipIt it comes with a thermocouple to be mounted in the exhaust right after the turbo. If the EGTs exceed the 550 deg maximum then the system is de-activated until the temp drops back down below that threshold. It also cuts out over 3500rpm as there is no need for it over those revs.
Unlike a lot of other systems too, the LPG is very precisely controlled with the pulse of the diesel injectors. LPG is precisely injected right from 1050RPM up to the 3500RPM cutoff. Most other system only inject over 5psi boost. As far as economy goes this method of injecting gas right from pretty much idle is much better as you are always getting complete burn of the diesel. Also this improves acceleration right off the line, not just when the turbo kicks in.
So far I have a noticable power difference. The mid-range torque increase is the most impressive and this is where the system is designed to offer the biggest performance gain. As I also have a Chip It with custom tune 2 running, I do not have the LOG turned up nearly as high as it can go. There is a good difference with the chip and gas on at the same time, and if I turn the chip off, the gas seems to make about the same performance increase as having the chip on, although the power delivery is a bit smoother and cleaner. I will be playing around with different combinations of chip and LPG tunes to find the best compromise between power and economy, but I'm sure the best results will come from turning the Chip tune down a few and increasing the LPG tune.
I have no results as far as economy goes so far, have only gone through a bit over half tank of diesel so far so too early to tell. A few weeks and I should be able to have some results.
LPG warehouse where I got the kit from have done an 09 Lux that's standard and reckon the range has been increased by about 250km per tank of diesel. They have seen similar results on other vehicles with very good torque increases too.
This system is designed for improving economy and mid range torque more than anything.
There are other systems that will make more top end power but this is not usually what you are chasing with a diesel.
Also this system uses a traditional LPG injection converter which has a water temp sensor that only allows the system to activate once coolant reaches 40deg to ensure complete of the gas.
This also means using a normal liquid withdrawal LPG cylinder.
I have mounted a 40L usable LPG cylinder under the rear of the tray where the spare was. We can fit a smaller tank in different locations that require either an exhaust modification or can be fit sometimes with no modification or removal of spare wheel.
I will report back soon with dyno results and economy figures but this system is already looking to be the best diesel LPG kit I've seen or used yet.