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Hi car owners with direct injection engine (GDI/Gasoline Direct Injection), would like to understand more about cleaning of carbon deposits on the intake valves. Anyone has experience to share about such cleaning service - chemical or mechanical - is available locally? Or has anyone tried to diy? More info on the need for cleaning can be found here: http://www.aa1car.com/library/intake_valve_deposits_gdi_engines.htm

Understand Direct fuel injection (DFI) engine requests higher petrol grade, can advis what grade is suitable? Heard most Jap automakers output models w/o (DFI) due to most countries fuel grade is not suitable for DFI engine, include Singapore?

http://www.straitstimes.com/singapore/transport/nea-clarifies-rules-for-car-emission-scheme National Environment Agency said yesterday petrol models with port fuel injection - where fuel is injected just before the engine's combustion chamber - will not be measured for particulate matter (fine soot). The exemption will apply when the Euro 6 emission standard kicks in in September and when the Vehicular Emissions Scheme starts in January. **** first it was the hoo ha on CAT A and 130 bhp because the dealers got no cars that could compete with turbo charge cars and claim unfair practice. Now, its the lack of ability in terms of port injection and cry foul on Port injection. When will the dealers own up and say we suck on building cars and face the facts and not blame other better cars out there

http://www.leftlanenews.com/hyundai-launch...ion-engine.html hyundai has just launched its first GDI engine. while mitsubishi launched it in 1996 in the Galant/Legnum series. Apparently this engine tech is much more efficient compared to the normal injection engines. But it has not gained much popularity outside of japan despite being available for 13 years. Could this be due to reduced efficiency and higher emissions results which is due to the higher sulphur content of petrols outside of japan? which other cars on the road now (in singapore) are using GDI engines? any bros here can enlighten me?

Read on the net that water injection is good for the car. Wondering if anyone here has tried that? Any comments? Thanks

Hi, relatively new to cars. can any one kindly explain the difference?

A good thread on water injection here: http://www.eng-tips.com/viewthread.cfm?qid=72284&page=5 These guys rock! So rainy weather improves our car's performance. Not only the ambient temperatures are cooler, the air is filled with water (must not be to much to displace oxygen). 20% better FC (which of course is used by our A/C ). The final combustion process of CO to CO2 is most powerful in producing energy and water influences it.

Hi, has anyone use this before? Particularly the "system 2d" that has a 3D water map.

Is cold air injection just to regulate the colder air in the air intake of the engine? I heard that a pipe would usually be connected from the car front to the air intake to make the air intake from the car front rather than from the hotter air in the engine bay. Is there any place where i can buy the item (pipe)? think possible to fix it by yourself as i would like to remove it when i send my car for servicing as i overheard this would void the warranty

Hi, I understand it can improve performance. But where to purchase in S'pore or do I have to order on-line ?? Where??? Thanks pg 92201625

I'm driving a May 1995 Suzuki Swift 1.0 GL. I'm new to cars so don't know if it's has a carburator or injection engine. Heard from the previous owner's mechanic that 1994 model and before uses a carb. Those 1995 models are using fuel injection engines. Anyone experts can advise?

The main function of these systems is to suppress detonation caused by high temperature and pressure developed within the combustion chamber when the effective compression ratio has been taken beyond the auto-ignition point by either a turbo or a supercharger. Water, with its high latent heat content, is extremely effective for controlling not only the onset of detonation but also the production of oxides of nitrogen in the modern leanburn engines. ERL's latest products are designed with great care to ensure each system meets the highest standards of both electronic and mechanical reliability. THE CONCEPT of injecting water into the internal combustion engine has been around for over 50 years. But the desire to extract more power from the standard production engine has increased at a neck-breaking speed. ERL has just revived this old principle, applying the latest techniques in both electronic and mechanical engineering to take water injection into the next millennium. WATER? Water exists mainly in a liquid state because that is its most stable inter-molecular structure. When we apply heat energy to it, its molecules begin to expand: a great deal of heat is absorbed during this process owing to water's specific heat capacity - approximately 4.2kJ/(kg.K). When the water changes from the liquid to gas state, large amount of heat energy is consumed in sustaining the process. The latent heat of evaporation is 2256kJ/kg, approximately six times more than gasoline! SO WHAT? Because of its huge specific- and latent- heat capacity, water is the perfect liquid for regulating excess heat under certain engine-operating conditions, for example induction charge air cooling; but its biggest contribution is inside the combustion chamber where, under excessive loading, pre-ignition and detonation can otherwise occur. Such abnormal combustion is particularly common in force induction engines, where exhaust temperature can exceed 1100

Here's a pictorial of a water injection installation for the S40T4 http://photos.yahoo.com/bc/limbroz/lst?.di...jection&.view=t