klxdrt Posted September 28, 2017 Share Posted September 28, 2017 Hi, New to forum & Legacy, have simple question: Does the 2017 Legacy 3.6 use Direct Fuel Injection? Link to comment Share on other sites More sharing options...
Ronin3.6R Posted September 29, 2017 Share Posted September 29, 2017 To my understanding- No. Sequential multi-point fuel injection Link to comment Share on other sites More sharing options...
rec630 Posted September 29, 2017 Share Posted September 29, 2017 Hi, New to forum & Legacy, have simple question: Does the 2017 Legacy 3.6 use Direct Fuel Injection? From spec page: Fuel/induction Sequential multi-port fuel injection (MFI) with cylinder head direct-mount multi-spray injectors and Electronic Throttle Control (ETC) system Link to comment Share on other sites More sharing options...
upstater Posted September 29, 2017 Share Posted September 29, 2017 6th gen legacy engines are not DI. Next generation of motors will probably have DI (the newest motors from Subaru, and most other manufacturers use direct injection), though the 3.6 will probably be replaced by a smaller turbo charged engine (2.0 DIT or 2.4 DIT). DI has advantages (mainly, efficiency, power + MPG increase) and disadvantages (no fuel hitting the back of intake valves = deposits over time that reduce efficiency, and eventually need to be cleaned off). DI helps the new Camry make 203 hp with a NA 2.5 liter engine, (compare that to the current gen 2.5 legacy 175 hp) Hopefully Subaru adds some additional injection pre-intake valve to keep them clean in their next gen motors. Link to comment Share on other sites More sharing options...
Too40gawlf Posted September 29, 2017 Share Posted September 29, 2017 MPFI in this application is a much better choice for longevity and ease & cost of maintenance. Thank Goodness! The current direct injection technology sucks for daily driver cars and long temr maintenance. Link to comment Share on other sites More sharing options...
XT-sub Posted September 29, 2017 Share Posted September 29, 2017 MPFI in this application is a much better choice for longevity and ease & cost of maintenance. Thank Goodness! The current direct injection technology sucks for daily driver cars and long temr maintenance. Exactly. Been there done that with the Forester SJ XT (FA20DIT). I want to stay with the 3.6R as long as I can (a beautiful engine) but I expect I will eventually have to replace it. In regards to fuel economy; I get the exact same calculated at the pump fuel economy with the 3.6R on the open road as I did with the Foz SJ XT, but less around town. Link to comment Share on other sites More sharing options...
Brisvegas Posted September 30, 2017 Share Posted September 30, 2017 Exactly. Been there done that with the Forester SJ XT (FA20DIT). I want to stay with the 3.6R as long as I can (a beautiful engine) but I expect I will eventually have to replace it. In regards to fuel economy; I get the exact same calculated at the pump fuel economy with the 3.6R on the open road as I did with the Foz SJ XT, but less around town. Direct Injection is a very interesting subject. Obviously the first GDI's had a problem (especially it seems with some Audi's) but they seem to have made some advancements since then ... but I guess the jury is still out on the long term future. I came across the following links that I found interesting. ( I included the first one because I think it explains GDI's in a plain non technical way.) http://auto.howstuffworks.com/direct-injection-engine.htm http://www.autoguide.com/auto-news/2015/01/is-carbon-buildup-a-problem-with-direct-injection-engines-.html http://www.aspenautoclinic.com/blog/the-low-down-on-carbon-build-up http://blog.caranddriver.com/explained-why-some-engines-have-both-port-and-direct-injection/ Link to comment Share on other sites More sharing options...
XT-sub Posted September 30, 2017 Share Posted September 30, 2017 ... Obviously the first GDI's had a problem (especially it seems with some Audi's) but they seem to have made some advancements since then ... In my experience & from what you will find posted on subaruforester.org I’m not so sure of that with the Subaru FA20DIT – that engine is a nice engine when it is running nicely but ... . I think part of the problem is the way the CVT is programmed to use that engines very good low down torque on light to partial throttle, which is very nice when you are driving it & good for fuel economy. Unless I missed it, for the small capacity DIT petrol engines I didn’t read anything in those articles that mentioned LSPI or engine oil fuel dilution! I’m just glad the 3.6R isn’t DI. Link to comment Share on other sites More sharing options...
Brisvegas Posted September 30, 2017 Share Posted September 30, 2017 I’m just glad the 3.6R isn’t DI. I share your concerns. I'm not sure if a 6 cylinder is in the long term plans of subaru ...... and either way, I think like most other manufacturers, some form of direct injection will be included in all future engines ....... the lure of enabling some fuel savings, will be too much for the boffins to resist. Link to comment Share on other sites More sharing options...
klxdrt Posted October 1, 2017 Author Share Posted October 1, 2017 Hi, Bought a 2018 instead of 2017. The Fuel System is Sequential MPI in the new 2018 Legacy 2.5 my wife & I bought yesterday. So far the car drives very nice. Studying up on the "eyesight" system. Below is a pix. Link to comment Share on other sites More sharing options...
Brisvegas Posted October 1, 2017 Share Posted October 1, 2017 Hi, Bought a 2018 instead of 2017. The Fuel System is Sequential MPI in the new 2018 Legacy 2.5 my wife & I bought yesterday. So far the car drives very nice. Studying up on the "eyesight" system. Below is a pix. Welcome to the forum ... nice color. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.