All the GDI, IVD and LSPI talk...

[bbhero]

Originally Posted by StevieC
Originally Posted by 4WD
Looked at some F150's with the new 3.3L TiVct since they were non turbo and dual point injection … but decided they had not been around long enough …

Yeah I broke that rule with my Toyota Highlander and the new 8-speed transmission and boy was I sorry I bought something that hadn't been around a while yet.

Oh well, live and learn.




^^^^^

Yeah that tough StevieC...

Thinking of you and your dad. Take good care of yourself.

 

[Mainia]

Originally Posted by Trav
I pay no attention to it, we are not finding the cure or cause here on Bitog. The subject interest me as much as a bicycle falling over somewhere in China.


They have bicycles in China?

 

[PimTac]

Originally Posted by Mainia
Originally Posted by Trav
I pay no attention to it, we are not finding the cure or cause here on Bitog. The subject interest me as much as a bicycle falling over somewhere in China.


They have bicycles in China?





You're kidding, right? I guess you have never been there.

 

[Virtus_Probi]

Originally Posted by MParr
All of the LSPI talk and oil addressing the problem is a bunch of bunk. Dexos Schmexos, I could give a rip. Whatever API rating that my owners manual calls is what it gets.

Despite Ford's Ecoboosts apparently not having severe LSPI problems (?), I noticed this little nugget of info on a spec page for Motorcraft 5W30 (either synthetic or blend)...
" This oil also meets WSS-M2C946-B1 and SN PLUS, therefore it can reduce oil derived low speed pre-ignition."
I don't know this for sure, but I THINK the new Ford -B1 specs include some kind of LSPI test. GF6 will also include an LSPI test in a Ford engine.
Funny how all these new standards are being introduced over a bunch of bunk...but, obviously you know best. We need to tell all the researchers running LSPI tests in labs to cease their work immediately...

 

[Purpfox]

The 18 up ecoboost truck all went to dual injection. 2.7 3.5 ect. The main reason is valve coking. gdi cant keep the intake faves clean. I would suspect that the fouling on the intake valves contributes to the lspi.
BMW was one of the first to require 25k intake valve cleaning service for it DI motors. With the reintroduction of Dual injection this is not required anymore.

 

[StevieC]

Originally Posted by Purpfox
The 18 up ecoboost truck all went to dual injection. 2.7 3.5 ect. The main reason is valve coking. gdi cant keep the intake faves clean. I would suspect that the fouling on the intake valves contributes to the lspi.
BMW was one of the first to require 25k intake valve cleaning service for it DI motors. With the reintroduction of Dual injection this is not required anymore.

This isn't the solel reason. I think they chose the same route Toyota and other OE's have where you get better efficiency and emissions control based on using each system at different times as was discussed in my Toyota D4-S thread.

Does it have a benefit of back washing the valves as well, absolutely but I don't think they chose it for this reason alone. Don't forget the direct injection engines that aren't dual setup and aren't experiencing the problems.

 

[dailydriver]

Originally Posted by PimTac
Originally Posted by Mainia
Originally Posted by Trav
I pay no attention to it, we are not finding the cure or cause here on Bitog. The subject interest me as much as a bicycle falling over somewhere in China.


They have bicycles in China?





You're kidding, right? I guess you have never been there.


I believe that you completely missed Mainia's MAXIMUM snark!

 

[dailydriver]

Originally Posted by Purpfox
The 18 up ecoboost truck all went to dual injection. 2.7 3.5 ect. The main reason is valve coking. gdi cant keep the intake faves clean. I would suspect that the fouling on the intake valves contributes to the lspi.
BMW was one of the first to require 25k intake valve cleaning service for it DI motors. With the reintroduction of Dual injection this is not required anymore.


Both the newest 5.0 Mustang GT engines, and the latest 1.5 liter 3 pot EcoBoost Euro/rest of world ONLY now

Fiesta STs) are both port and direct injection system as well.