Hope this is not a silly question

sonic370

Not a gear head but have been reading about something called
direct fuel injection. i understand what fuel injection is. so what is the difference. and does it increase horsepower............

Red__Zed

DI involves injecting fuel directly into the cylinder rather than into the intake tract

MattP725

What he said... gives a more precise mixture of fuel/air.

kellyefields

It gives a cleaner burn and has been shown to increase HP on some vehicles like the CTS as well as being able to burn a lower octane with no decrease of HP or risk of knock.

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christian370z

It gives you better fuel atomization as the fuel is able to be sprayed in a more precise pattern directly into the cylinder which allows for a more complete burn, hence why it yields fewer emissions and more power since more fuel is being burnt for the same amount injected.

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Island_370

There are negatives (I know it is true for the Audis, but not sure about brands)......
The lack of fuel flowing over the intake valves can lead to dirt build up on the valves. Mosr fuels have cleaning additives that clean the intake valves.

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