It is termed 'dual turbos' or more specifically ' sequential turbos'. Twin turbos implies identical turbos which they are not.

 

Sequential turbos...not twin turbos. One feeding the other.

 

Ford well be on top for 2008 setting the bar yet again!

 

Read in a boating magazine where they were gettin 425 horses and almost a 1000 ft.lbs. of torque out of an electronic 5.9 cummins. I guess no emissions for a marine application.

 

ahh, but how can they keep the egt from melting everything pulling a 15k trailer up an 8% grade with the drivers foot on the floorboard?

 

Good point

 

I would think the engineers could put a sensor in prior to the turbo so it would back off the power when 1300 or 1350 degrees was reached. A factory EGT gauge would also be nice, maybe with a warning light like on a racing oil pressure gauge to warn when the EGT gets excessive.

Maybe too much info for the average Diesel owner though.

 

I am amazed at how many apparently didn't bother to read the 14 page presentation from International on the new 6.4L PowerStroke. Here is page 11 of the 14 page document.:

oil drain was 7,500 for 6.0L
fuel filter was 15,000 for 6.0L

from page 3:

 

I would suspect that most of those that saw the link read it in it's entirety. The problem is it is pretty dated material. While it is very interesting information it likely has been taken as general in scope.

The info is approx. 1.5 years old and many changes could have occurred since then...so I wouldn't take anything to the bank on this except basic hard design criteria. Sequential Turbo's etc....

Example: it will be interesting to see if Ford subscribes to things like the 10,000 mile oil change.

 

wow, so its a smaller turbo feeding the bigger turbo, but the bigger turbo is still a VVT? if im thinking right, then we could see HUGE increases from aftermarket tuners. the only reason i can come up with for them keeping the bigger turbo VVT is so it can make 350hp and 650lb-ft torque at see level, and then keep making 350/650 at high altitude by changing the vanes on the VVT so it produces more boost since the air isnt as dense. does that make sense at all?

 

Now would probably be a good time to order a plow if you want to be in the snow removal business come first snow fall.

 

Oh, I get it, you were being punny, cause you're Aussie... nevermind.

 

Everything sounds great... also sounds like alot of things that can go wrong.. will have to wait and see before making my choice in '08.

 

the GM numbers seem rather low, as in most cases I have seen, a stock duramax LB7 normally runs 250rwhp which is about 80%. That is with stock sized tires. If it had 265's or 285's (bigger than stock) it would rob hp and not look as good on the dino. hense the about 80% of the hp goes to the rear wheels. Every newer stock 6.6 6.0 or 5.9 HO cummins truck I have seen dino is about 250-260 the only truck that really shines is the new LBZ max.

Food for thought.................. all of the new diesels can be chipped/tuned to make big hp. What would really make ford shine was if the tranny could actually hold up reliably to a tune that makes 500rwhp.

 

True. My understanding is the torqueshift holds up the best as stock trannies go. The Allison, well, isn't really an Allison, but another GM tranny with Allison namesake and heritage. It even defuels IN gear, not just while shifting. The Mopar one is certainly the weakest.

No matter how you look at it, 500rwhp would need an aftermarket tranny for any of the big three.