Ford's new diesel.... not sure what to say

[Alligator]

Did any body notice the CP4.5± Bosch injection pump?

 

[JOHNBOY]

Anyway... this so-called Single Sequential Turbo the article states "a twin turbo setup in a single package". That is so far from the truth. It's a single turbo.... period. The two compressor wheels are identical albeit mirror images of each other. They are both mounted together on the same shaft. No independence. It's a single charger with a double compressor wheel. That in no way makes it a twin. True twins operate independently of each other.

This concept is not new. Garrett has been messing with it for a long time. The Twin compressor turbos have even snuck into some pulling tractors. I hate to burst your bubble but what most refer to as twin are actually compound turbos. The setup they have will do the same thing as convetional compounds. There is two stages of compression to multiply atomospere. No different than the "twins" mention. Both they are still actually two stage compounds. One setup drives both compressors with one turbine the other seperatly with two turbines. Now you can have 3 turbos but only two stages. You can have 4 turbos but only two stages. Heck you can get nuts and have 6 turbo but only two stages.
:happy2:

 

[T2CH]

I hope it's fast, I wouldn't want to be seen in anything that ugly if the pic represents what the 2011's will look like.

 

[hoot]

This concept is not new. Garrett has been messing with it for a long time. The Twin compressor turbos have even snuck into some pulling tractors. I hate to burst your bubble but what most refer to as twin are actually compound turbos. The setup they have will do the same thing as convetional compounds. There is two stages of compression to multiply atomospere. No different than the "twins" mention. Both they are still actually two stage compounds. One setup drives both compressors with one turbine the other seperatly with two turbines. Now you can have 3 turbos but only two stages. You can have 4 turbos but only two stages. Heck you can get nuts and have 6 turbo but only two stages.
:happy2:

But there is a big difference between two discrete turbos being driven by separate turbines and this one that is driven all by one turbine on one shaft. I guess it may be a good thing. At least everything is happening in sync instead of two separate chargers spooling differently. I see your point.

 

[mytmousemalibu]

The most common place and likly were the idea originated from is Turbine's and Jet engines. The majority all use axial flow stages but older turbines and such it was common to have centrifugal compressor stages and or mixed with axial stages.

I had daydreamed somthing along these lines once! It IMO sounds like an awsome turbo if it works well. A largish turbine W/ VNT to control it and a 2-stage compressor assembly could net some stupid boost from a single turbo!

 

[McRat]

Multi-stage compressors have been at AiResearch/Garrett for quite a while now. Much of the research was done when they worked with NASA for a high altitude piston aircraft, IIRC.

Our problem is that if you want over 30psi boost (3:1 PR), the operating range drops quickly with a single compressor. And twins double the costs and use up valuable room, as well as increase service costs. A multistage compressor might be the hot ticket.

There is also variable compressor technology out there as well, but I believe it still suffers from narrow operating range.

 

[Leadfoot]

Not having done any reading on the 4.5 Duramax, it was cool to read about the reverse airflow system. Will the placement of the turbo on the 6.6 and the "adjustments" to the intake plenum for the turbo, it would have been nice to have our engine reverse airflow to avoid alot of issues. Thinking outside the box on this one is pretty cool.

Question for guy and others. ASSuming money was not an issue, how hard (or is it possible) to convert a traditional 6.6 to reverse airflow? I'm assuming a good fabricator could do the reworked plumbing and if you could get a cam manufacturer onboard to grind a custom cam is it possible/feasible or is there something else that would throw a wrench in the works?

Edit: I agree with Ben, I hope (even if the motor itself has issues) that these new technologies help push diesel performance to a new level. Alot of interesting concepts being tried, and hopefully can be exploited or improved upon.

 

[hondarider552]

also came across this... max rpm is 2800?
http://jalopnik.com/5349452/from-vulgar-display-of-power-stroke-to-sounds-of-silence

 

[McRat]

The exhaust ports might overheat since they were designed as intake ports. Port flow is usually design with direction in mind. Intake ports are normally larger than exhaust ports, as are valves.

 

[WolfLMM]

Like I said the two stage compressor will be cool. It will be just like compound turbo's but without the additional cost and turbo.

 

[mytmousemalibu]

Bet a Multi-stage turbo is mighty expensive though

 

[NemesisDP]

Seen one pulling out of PHX with a 5er behind it like a 23-25 fter or so. Seemed like it was having a hard time pulling unless they were taking it easy. Had a 25,000lb generator behind me and slowed down to take a peek at it. Had black covers all over it. It was real quiet also.