Has anyone considered adding an oil separator to the W12? With the engine having direct injection we certainly have an oil buildup issue on the intake valves, but are there charge coolers in the air intake after the PCV induction? This was always the first addition to a supercharged engine so I was curious if anyone here has considered it?

 

Hello @EJag66 ,
I do not believe that your 2014 Speed has direct injection (TSI), I believe it has TMPI, aka, multi point injection, which sprays on top of the valves, not directly into the cylinder, and if it does have direct injection, it would also have multi point injection, as that is the system that was used when it was released into the W12 GT, so either way, no build-up, but again, I do not think you have that system.

It would be interesting to see if in fact you have TSI and TMPI, as some sites list it as in a 2012 GT, and a 2014 GT, I believe this to be a mistake, as I believe that they are referring to the V8 GT, as Bentley themselves didn't release any information on the W12 system until a 08/29/2017 press release that I can find, and the only information on the GT having it is for the 2020 model year, yet the Bentaga had it earlier, and be it the Bentaga or the 2020 GT, those would have both the TMPI and the TSI as discussed in the press release.

https://www.bentleymedia.com/en/news...ng-performance

I had the 2014-15 W12 engine, and it did not have TSI / direct injection, only TMPI.

I have some pictures of the W12 head, yes the injectors are mounted in the heads themselves, but the injectors do not inject into the cylinders, they inject right on top valves as shown, therefore no carbon/oil build-up.

The picture showing the valves is from a blown engine I have, I have clean heads if you want a better picture.

Johnny

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Johnny,
As always, you are an amazing resource. Thank you!

 

@EJag66 ,
Thank you, I try.

Johnny

 

So if I understand correctly then, all 8 cylinder engines have direct injection?
correct or no?