The Benefits of Direct Injection
Engines are fascinating pieces of equipment. Effectively developed in 1859 the concept has been taken to levels early inventors couldn’t have dreamed of. Direct Injection is truly a game changer, but it’s not as new as you might think. In fact…
It’s really old
Old as in 1902 old. Yes — the concept was first realized over 100 years ago by a man named Leon Levavasseur for use in aviation. So while manufacturers try to sell us on the latest and greatest in cutting-edge technology we owe our burnout induced torque to someone who will probably never be mentioned in an ad of a brochure.
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Under Pressure
A standard fuel injector may operate under loads of 50 pounds per square inch. Not the case with direct injection. Bosch made units can see upwards of 58 times that amounting to 2900psi of force. It is not uncommon to have more than one fuel pump to meet the requirements. This technology really pushes GM to the front lines of performance.
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Battle for Control
ECUs are only as good as the equipment they control. To more accurately meter the air-fuel mixture direct injection had to happen. When you pair this increase in sensitivity to existing technology like variable cam timing you get massive amounts of low-end torque. Some DI engines are making peak numbers as low as 1,400rpm allowing performance cars to rocket out of slow speed corners and launch with neck-snapping speed. They also improve emissions: a huge plus for people living in states like California!
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Money talks
It’s expensive to manufacturer…at least for now. Hopefully, as this becomes more common in the industry the costs will level out. GM has made a good decision in producing the lower displacement Ecotec engine in an attempt to corner the market. Aftermarket kits are already being made for non-Chevy platforms to swap this motor and becoming quite popular with enthusiasts.
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Cons?
Reports of carbon build up at the back of intake valves have cropped up which manufacturers have seemingly addressed via timing and computer software. While no system in a car is accident proof there will no doubt be improvements made. I don’t see the industry going backward after direct injections have been implemented. Like anything, there are teething issues that need to be sorted, but it is certain we are living in the most exciting period of technology and speed in the car industry.
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For help with service of your car, check out the how to section of LS1Tech.com
