GDI.

[yella71]

Gasoline direct injection. Who comes up with this stuff?!.....

 

[tmaleck]

GDI is the next step in technology that gives 1.5 to 2+ HP per cubic inch. Has drawbacks, but a big step forward.

 

[Daliant]

Take a look at your intake valves on a GDI engine.

 

[493 Mike]

Bombardier has been using GDI on SkiDoo/Rotax 2 stroke snowmobile engines for many years now. Great power, increased MPG, lower emissions, and more power! Win win. The future is here!
Mike

 

[Slap Stick]

Works well with 2 smokes. Messes up 4 strokes.

 

[yella71]

GM 3.6 ..... junk

 

[davek]

Kia has those on some of their cars,my buddy has a shop and is not impressed with it. Maybe 2nd gen will be better.

 

[yella71]

I don't like how the injectors are mounted to the heads. I have been fixing diesels for 30 years. almost all are direct injection. Much better as far as the way the injectors are mounted in the head. yeah the back of the intake valves look like ****.

 

[1 Wild R/T]

Might want to look at a 1954 Mercedes SL300, the first GDI...

 

[Photon440]

Might want to look at a 1954 Mercedes SL300, the first GDI...

Maybe for cars. Daimler-Benz's DB 601 aircraft engine (used in the BF-109) had direct injection starting in 1935 although Wiki mentions truck engines using it as far back as 1925 (Hesselman engines in Sweden).

 

[F4R/T]

I’ll stick with more cubic inches and a toilet bowl up top.. simple and effective lol

 

[alfaitalia]

Most modern cars are GDI now....at least most of the ones you can buy here are....Mitsubishi started the modern era use of it in about 1996 ( in the Gallant.....the first mass produced car with GDI),then Peugeot, Citroën, Hyundai, Volvo and Volkswagen all started having licensed the tech from Mitsubishi. My next DD, money allowing (ALFA Giulia Quad) has both direct and indirect injection firing at slightly different times (lower emission than just GDI apparently).....but even that is nothing new Toyota where doing that on their D4-S V6 engines back in 2005. And yes the intake valves get dirty....I just rebuilt the head on a 2.2 ALFA engine.....intake ports and valves where caked in sticky carbon....combination of no fuel passing by to clean them and EGRs hot exhaust and the PCV oil fumes combining to bake the sticky mess on them!!

 

[yella71]

This is just my first time doing a repair to a GDI system . I know they have been around a while, but this is my first go round . Im not impressed. As said the way the injectors are installed in the head. That being said Im not very impressed with modern technology as far as it is applied to most things. Things these days are waaayyy over engineered. Especially German stuff .

 

[alsant]

I put a oil catch can on my JGC 5.7
I have to empty it about once every month

hope it helps keep the build up to a minimum.