2017 Focus SE Sedan Ecoboost

I would also blame the head-integrated exhaust manifold that has coolant running through it

In reply to MrChaos:

Everyone does that nowadays, though. I'm assuming that it does the somewhat contradictory tasks of getting a catalyst as close to the exhaust valve as possible for fast light-off, and retaining/recouping as much exhaust heat as possible so that it can be exploited for faster warmup.

There are literally millions of Honda V6s that are doing that, for example. Whatever series it is that is in Accords and Odysseys and Pilots and such as.

Knurled wrote: In reply to MrChaos: Everyone does that nowadays, though. I'm assuming that it does the somewhat contradictory tasks of getting a catalyst as close to the exhaust valve as possible for fast light-off, and retaining/recouping as much exhaust heat as possible so that it can be exploited for faster warmup. There are literally millions of Honda V6s that are doing that, for example. Whatever series it is that is in Accords and Odysseys and Pilots and such as.

But those millions of Honda V6's aren't high strung 3 cylinders with a turbo sitting damn near on top of the valve cover running balls to the wall in economy cars driven mostly by people who don't check fluids or pay for maintenance.

In reply to crankwalk:

How about in Ridgelines towing who-knows-what and Odysseys completely full of kid paraphernalia?

No, there's no turbo, but I do remember that there was something about a class action lawsuit because new Hondas were burning a quart of oil between oil changes and people bought a Honda so that they could ignore it entirely and they felt cheated.

Knurled wrote: In reply to MrChaos: Everyone does that nowadays, though. I'm assuming that it does the somewhat contradictory tasks of getting a catalyst as close to the exhaust valve as possible for fast light-off, and retaining/recouping as much exhaust heat as possible so that it can be exploited for faster warmup. There are literally millions of Honda V6s that are doing that, for example. Whatever series it is that is in Accords and Odysseys and Pilots and such as.

As odd as it sounds, the heat loss during the cat light off phase is more about bends and other directional plumbing losses than the materials. We studied this at great length a long time ago- and concluded that the best dual thin wall manifolds were not much of an improvement over just cast material. The fact that the integrated manifolds have better flow (since there's one less junction), they light off just fine.

At peak heat, though- they are able to keep the turbo and the catalyst a little cooler, which reduces enrichment for component protection. VW also has a small engine with an integrated manifold.

Knurled wrote: In reply to Duke: They're putting the 2.7 in cars now? That's awesome!

Yeah, the Fusion gets it in Sport trim, at least, and probably others.

Decided against the Focus 1.0. Thanks all

and probably others.

At least one Lincoln. I haven't got their TLA soup memorized. It's one of them..