Most LPG installers tend to try several makes and then, for whatever their reasons choose one make they feel comfortable with, this may be due to the complexity of that kit and their technical ability. They then try to convince every potential customer, on every new enquiry, that their chosen make is the best one to have no matter what their vehicle.
Some branded LPG kit manufacturers eg. Prins, BRC, Zavoli. We believe a better approach is to compare an LPG system to an Audio Sound System where different makes of separates make up the best reliability and sound quality. Sony for example may build the best amplifier, Technics the best Tuner and Mission by far the best speakers. Using this example Prins may build the best ECU but the best injectors might be the ones BRC build but the most reliable and highest power reducer could be manufactured by Zavoli.
At the time of originally compiling this website about 3 years ago, we would have strongly favoured the BRC system as being our number one choice, closely followed by Prins and then Zavoli. Whilst in recent years the Italian and Dutch LPG manufacturers seem to have stood in developing their systems excluding of course any recent direct injection systems the Poles have made massive steps into making their systems the best performing, most reliable and technically the most advanced in the world.
If we had to choose today, just one make of LPG system, based on reliability, cost, suitability, performance, driveability and value for money for ALL non direct injection types of vehicles the unanimous choice from all at CRD Performance would without any doubt whatsoever be the AC.
Stag system. Needless to say, with there being no language barrier we have no problem at all when needing technical assistance or to discuss any special software requirements. Stag have produced their own ECU electronic control unit but then programmed it so it can be used with almost any make of LPG injectors or reducer type currently available.
Stag also manufacture in house their own design LPG injectors and LPG reducer as well as complete wiring harnesses, pressure sensors, connectors, looms and switches, in fact just about any part required for an LPG system. This new approach from Stag allows LPG installers to tailor make a full kit for their customers particular requirements based on vehicle type, available budget, life expectancy, reliability, performance requirement, installation quality, appearance and driveability.
By choosing cheaper components with a shorter life expectancy and fitting them quickly in the easiest and non-cosmetically pleasing way, overall vehicle performance and driveability may be compromised but the customer will get a quick and cheap installation.
Alternatively, the same Stag ECU control system can be installed by CRD Performance but using the best available and most suitable make injectors and reducer s to suit the performance requirement of the vehicle. The vehicle is road tested and diagnostically checked using a scan tool before installation and the customer advised of any current fault codes present or driveability concerns, if required, these could be properly diagnosed and rectified, at an additional cost of course.
The LPG injectors will be installed using correct size jets and manifold nozzles to ensure faultless driveability and performance, these will be installed in a cosmetically pleasing way ensuring all wiring is shortened where necessary and neatly loomed using black cloth tape. Final set up and calibration is carried out by a skilled fuel injection engineer using our rolling road where necessary to ensure the best possible performance is achieved followed by further on the road map refinement ensuring optimum driveability and performance.
No matter how perfectly designed an LPG system may seem to its makers the real test is when installers fit them to many makes of vehicles, all with different performance and driving style requirements.
Without going into too much detail of all the Stag systems features we can summarise and say that whatever the engine capacity, number of cylinders, BHP or engine type, the Stag system is able to cope with it. Unfortunately, due to the weak currency exchange rate between Poland and Western Europe, these kits are cheaper to buy in the UK than most of the kits manufactured in Holland or Italy and therefore very popular and often used by low cost budget non LPGA certified back street LPG installers.
The Stag product range is huge but unfortunately, in an attempt to keep installation costs to a minimum, some installers still cut corners and often use the incorrect and cheaper readily available interchangeable parts for some installations. Stag permanently employs about staff in Bialystok Poland and in peak demand times this often increases to about If you are serious about getting your vehicle converted, be it from petrol to LPG or diesel to LPG Diesel Blend, and are in agreement with our prices then make an appointment to come and see us.
Designed by Magram. Main Menu. DPF Problems.With many manufacturer coming out with LPG Apart from making slight changes like advancing ignition timing to compensate low burning rate of lpg Acetone Just kidding man I think the usual basic mods should work - conical filters, free flows etc, since they depend on air flow and not on fuel.
Do correct me if I'm wrong though. Tri-phase module should also work according to Viper. I think whatever modification we do aiming to improve performance will show increament in petrol as well as LPG Its because of the fuel charecterisitc of both fuels My thinking is to bring car at par with petrol performance without burning hole in pocket View My Garage.
The whole point of moving to LPG is to reduce costs and yes there is a defn drop inperformance due the inherent problems with the way the fuel burns, however please remeber the easiest way to increase performance on a lpg vehicle is to run it on petrol, if you want to continue running it on gas you will need to increase the amount of gas being flowed into the system which in turn will again hurt your pocket. PS: Most mods for petrol engines do work on LPG cars too, but you have to increase fuel flow, so no savings.
Last edited by Psycho : 21st July at Hey Psycho could you please elaborate on point 4 - burnt fuel pump and faulty injectors please? Was thinking about LPG, so trying to weigh all the facts. Ans:- 1 If one wants to save money on gas why buy a flashy car in the first place- Ans: Whats the connection? Ans:- Whos cribbing? Ans:- OK. Ans:- Its obvious you need to brush up on the working of a modern LPG system. So Amen.
Psycho is there any way to avoid any of these problems? Last edited by Boom Shiva : 21st July at Can I get a switch installed for the pump and plugs? Well just to clear the air, here is my 2 cents. If you go down to the atomic level both LPG and petrol are basically long chain hydrocarbons.
The only difference is a few atoms here and there. LPG has a much higher octane rating, so you can bump up both compression and timing advance to recover lost power. Now regarding installations There are a lot of chaalu mechanics out there who take kits designed for carb engines cheaper and fit them into MPFI cars by cutting and splicing leading to probs Psycho mentioned.
Just like all cars are not equal A good kit will have an injector emulator module and a timing advancer module that keep the pump an injector just fine. As far as power, if you are worried, buy a car that has more than enough power and then LPG it.Login or Sign Up.
Performance LPG. Posts Latest Posts. Page of 2. Filtered by:. Previous 1 2 template Next. The System i will be using is a Impco mixer bolted onto a Holley 4 barrel squarebore baseplate good for at least horsepower and the converter will be a Model "L" Impco. The motor has all the usual goodies and has a Gas research Voodoo camshaft and comp. Anyone else use LPG for a performance application and how did you go? Also anyone have any info on who has the cleanest and highest octane LPG going around.
Tags: None. Check out fullboost forums too bcos some1 posted a similar topic, have u already bought the Impco system? Comment Post Cancel. Have seen the Impco on a 13B turbo rotary, was running ok but had problems tuning it. VC V8. Hi All, I'm using twin GRA carbs that flow a total of cfm, twin B2 converters on a Harrop single plane manifold with "cleaned up" EFI style heads on a block stroked to ci, 9.
Its putting out around Kw at the tyres. I'm very happy with the set up. Just gotta sort out the oil going into the inlet manifold on certain corners of Phillip Island race track oil catch can plumbed up soon and all will be right.
Steevo, I used to own an HQ with a worked chev some years ago, which I ran on straight lpg.
How To Improve Performance In LPG driven car
I had a very similar setup to yours, however at about cfm on a holley 4 barrel rating the impco is a bit restrictive at higher revs. If I were to do it again I would run 2 impco mixers for a total of cfm. You will have to make up a custom adaptor to mate the 2 mixers to the holley baseplate, you can turn these carbies on their side to clear the bonnet, I think they'll even work upside down seeing as they dont have a float bowl. If you are using a dual plane inlet manifold, you could set it up so that each mixer supplies one half of the manifold.
Don't worry about the seemingly high cfm figure, these carbies are of the "constant depression" type, like an SU, and the gas valve in them will only lift as high as the engine demands, making it difficult to over-carburate with them.
Being as gas, LPG does'nt need any extra manifold heating to keep it vaporised, so keep as much heat out of the inlet manifold as possible, which is a real problem on V8s which use the manifold to cover the cam valley. Things like, blocking the exhaust crossover if it has one, insulating gaskets, and an oil splash sheild under the manifold can help, as well as a cold air intake to the carbies. The compession ratio you are running sounds about right, the camshaft is probably fine too.
Biggest negative was the lack of top end HP, but I'mm quite sure that was a result fo the carby being to small ,points ignition, and not having tuned it properly. Hope this is of help. I found a site from a bloke in the USA that has been working with impco products for years and he has more university degrees than ive had goood dinners!!CRD Performance trading as F1 Automotive have been carrying out LPG Autogas conversions since January and in this time period to November have converted in excess of a thousand petrol engine vehicles.
Most LPG installers tend to use one or two preferred makes of LPG system and will often fit these to every make and model of vehicle that comes into their workshop in the belief that they will always achieve good results. There are others, mainly from Eastern Europe, but these are only a minority. Some companies manufacture complete front-end kits these are the bits that fit in the engine bay while some manufacture only the electronic parts and then outsource the LPG injectors and LPG reducers.
Likewise, some manufacture the LPG injectors and reducers but then outsource the electronic components. Ironically, the largest LPG equipment manufacturing company in the world, Landi Renzo, who are also Italian, not only buy their electronics from AEB also, but they own them too!
As for the Dutch sytems; Prins build their own electronics and reducers but buy their injectors from Keihin in Japan. They then claim their kits are the best in the world, all because of the good quality Japanese Keihin injectors they use. Tartarini make their own reducers and injectors but then buy their electronics from AEB, Lovato do similar but also buy their reducers from Landi Renzo. The Poles tend to manufacture their own electronic control units and sometimes their own LPG injectors and reducers but then make their software compatible with a wide range of different injector and reducer makes.
KME make their own excellent reducer while the Majic injectors they promote are probably one of the highest flowing and most powerful injectors we have ever tested using our rolling road dyno. The injectors are without doubt the most crucial component in any LPG system and apart from Keihin in Japan Prinsthe Korean made Hanna and Polish Barracuda injectors, that we often fit, are probably the best available.
One of the few companies we believe manufacture and sell only their own equipment is BRC in Italy. We still rate this as probably the best make of kit available all round, but expensive when compared to the Polish kits. Sadly, due to the lower purchase cost of some of the Eastern European LPG kits, they can attract less competent installers who, for very little cost, will fit a full LPG system in a day a day!
Following installation, the LPG system has to be programmed, calibrated, and then the vehicle road-tested using a Scan tool, to ensure correct fuel trim set up. Some petrol vehicles leave the factory running so lean on wide open throttle that just by adding a little more gas on acceleration can improve BHP and torque significantly.
When choosing an LPG kit for a specific vehicle application, we at CRD Performance have several things to consider, including first and foremost the customers budget.
For example; is it going to be used as a Taxi or Learner Driving School car? Will it be continually stalled or stop-started and therefore be requiring a specific type of LPG system that allows instant gas start up when the engine is warm.
Does the engine rev at a very high RPM, requiring special high-flow injectors and will it require additional valve care lubrication? Is the engine supercharged or turbocharged and therefore requiring the LPG reducers to be installed using MAP sensors and boost compensation?
How long the vehicle is likely to be kept? Is the engine intake manifold easy to adapt for LPG injection or are long pipe lengths necessary therefore requiring an abnormally high gas pressure and use of high current, low impedance injectors? Is it a high powered vehicle and will it require two reducers? Will it also need a fuel return modification because it has a return-less fuel system?Understanding LPG fuel systems. Any LPG fuel system, from any LPG fuel system manufacturer, including factory fitted systems, can be classed as belonging to one of six design type categories.
With exceptions, it is possible to fit most types of LPG system on most vehicles, and indeed the vehicle would then run on LPG, but there can be serious problems in fitting the incorrect type of system on a particular vehicle. Each type of LPG fuel system is designed primarily to work with one type of petrol fuel system. This page explains the different types of LPG fuel systems and which type of petrol fuel system each is usually fitted to.
There are several main types of LPG fuel systems and many different manufacturers producing systems of each type. Open loop means the fuel system gives the engine a fixed amount of fuel for any particular operating condition.
Carburettors and early fuel injection systems work in this manner all the time. By keeping the mixture correct performance, economy and emissions are all optimised. Multipoint systems have a separate point for each engine cylinder just like with multipoint petrol injection systems. Referring only to some types of multipoint LPG system, sequential means each LPG injector injects fuel in the same sequence as the engine cylinders fire, in a sequence one after the other.
Below is a description of each of the main basic types of LPG fuel system in the order in which they were developed. The further down the list, the more advanced and suitable for modern vehicles.
Single point or mixer open loop systems. Suitable for carburettor and some early fuel injection engines. Single point or mixer closed loop type systems. Suitable for most fuel injected vehicles produced up to around year and a smaller proportion of more recent vehicles. These systems can also be fitted to carburettor vehicles if a further inexpensive part Lambda probe is fitted in the exhaust. These systems use most of the same parts as the single point open loop systems described above, but have a few additional and different parts.
The manual control valve is replaced with an electronically controlled LPG control valve which is controlled by an electronic unit that has a computer. In addition, when you put your foot down on the accelerator they can be set up to give a richer mixture for more power - this is what carburettors try to do and fuel injection does.
They are completely independent of the petrol fuel system, so as long as the ignition system on the car works the engine will run even if the petrol fuel injection system is completely broken.Liquefied petroleum gas or liquid petroleum gas LPG or LP gasis a flammable mixture of hydrocarbon gases used as fuel in heating appliancescooking equipment, and vehicles.
It is increasingly used as an aerosol propellant  and a refrigerant replacing chlorofluorocarbons in an effort to reduce damage to the ozone layer. When specifically used as a vehicle fuel it is often referred to as autogas. Varieties of LPG bought and sold include mixes that are mostly propane C 3 H 8mostly butane C 4 H 10and, most commonly, mixes including both propane and butane.
In the northern hemisphere winter, the mixes contain more propane, while in summer, they contain more butane. Propylenebutylenes and various other hydrocarbons are usually also present in small concentrations.
A powerful odorantethanethiolis added so that leaks can be detected easily. The internationally recognized European Standard is EN In the United States, tetrahydrothiophene thiophane or amyl mercaptan are also approved odorants,  although neither is currently being utilized.
LPG is prepared by refining petroleum or "wet" natural gasand is almost entirely derived from fossil fuel sources, being manufactured during the refining of petroleum crude oilor extracted from petroleum or natural gas streams as they emerge from the ground. It was first produced in by Dr. Walter Snellingand the first commercial products appeared in As it is a gas, it does not pose ground or water pollution hazards, but it can cause air pollution. LPG has a typical specific calorific value of As its boiling point is below room temperature, LPG will evaporate quickly at normal temperatures and pressures and is usually supplied in pressurised steel vessels.
The ratio between the volumes of the vaporized gas and the liquefied gas varies depending on composition, pressure, and temperature, but is typically around LPG is heavier than airunlike natural gasand thus will flow along floors and tend to settle in low spots, such as basements. There are two main dangers from this. The first is a possible explosion if the mixture of LPG and air is within the explosive limits and there is an ignition source.
The second is suffocation due to LPG displacing air, causing a decrease in oxygen concentration. LPG has a very wide variety of uses, mainly used for cylinders across many different markets as an efficient fuel container in the agricultural, recreation, hospitality, industrial, construction, sailing and fishing sectors.
It can serve as fuel for cooking, central heating and to water heating and is a particularly cost-effective and efficient way to heat off-grid homes.
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LPG is used for cooking in many countries for economic reasons, for convenience or because it is the preferred fuel source. In India, nearly 8. The number of domestic connections are million i.How to install Liquid LPG system on your car
Piped city gas supply in India is not yet developed on major scale. LPG is subsidised by the Indian government for domestic users. Increase in LPG prices has been a politically sensitive matter in India as it potentially affects the middle class voting pattern. However, other than electric, induction, or infrared stoves, LPG-fueled stoves are the only type available in most suburban villages and many public housing estates.
Also, since the national oil company Petrobras differentiates between LPG destined for cooking and LPG destined for other uses, practicing a lower price for the former. This is a result of a directive from Brazilian federal government, but its demise is currently being debated.
LPG is commonly used in North America for domestic cooking and outdoor grilling. Predominantly in Europe and rural parts of many countries, LPG can provide an alternative to electric heatingheating oilor kerosene.
LPG is most often used in areas that do not have direct access to piped natural gas. CHP is the process of generating both electrical power and useful heat from a single fuel source. This technology has allowed LPG to be used not just as fuel for heating and cooking, but also for decentralized generation of electricity. LPG can be stored in a variety of manners.Ford Motor Company also have vehicles on offer with a factory fitted option. The other two systems are liquid injection systems. Liquid injection systems works similarly to a petrol-injection system, liquefied fuel is pumped out of the tank to a fuel pressure regulator and to the injectors.
The system comprises of an LPG fuel tank with an integrated pump, a fuel pressure regulator with a pressure sensor and safety valve incorporated into it, liquid gas injectors and the LPG ECU. These systems require less time to service and rarely suffer from a build up of contamination, but theses systems do develop faults that we are equipped to deal with, using the wiring schematics of the system, and having a full understanding on how these systems work we can diagnose and repair them.
Designed by Magram. Main Menu. DPF Problems. Rolling Road Dyno. Information Videos. LPG Autogas. User Menu. Log In. Ford LPG Systems. Repair and Servicing Ford Motor Company also have vehicles on offer with a factory fitted option. All Rights Reserved.