Navistar has a video out that compares the 6.7 to Navistar's V-8. Major issue is Ford's use of Aluminum heads vs. Navistar's CI and alleged superior strength of Navistar's bottom end vs. Ford's choice of cross bolted mains.

Your version?

 

Guys, my hat is truly off to you!

This has been a complete turn around and you all have stepped up to the plate and we're grateful for your candid responses.

Keep up the great work and like we said from the beginning, we thank you all for your participation on FTE. It's making my decision to look toward another Super Duty for a replacement vehicle in the near future a lot easier.

 

Good answers to the questions that got answered. With today almost over I assume since we have not heard if the the Q&A was extended that it is done and the remaining questions and new ones won't be answered.

I would like the Q&A to be extended, since there are lots of good questions that have not been answered or mentioned of a place to find the info.

Please continue to answer our questions.

 

Job is NOT Finished.........

Keep Going...........

In other words: "Damn the Torpedos, Full speed ahead"

 

I thank the team for today's responses, have a great weekend

 

I give credit where credit is due and for their recent endeavors, the Ford team deserves a round of applause! The answers in this round seemed much more candid and informative. I look forward to the next round of answers.

 

+1 to Matt -

So now I have one of the great debate questions to ask. On the 2015 SuperDuty what are the differences between an F250 and F350 SRW?

 

350 is 100 higher than 250.........................

Really.......Good question !!

 

I have been curious about this 30,000psi in the pump and fuel rails and injectors. 30,000psi is way beyond ignition/detonation levels, what happens when an air bubble enters the system/pump and ignites?

We have seen oil pumps destruct on race cars (high rpm) because of foaming oil and detonation in the pump itself. It happens not from the little 80-100psi of oil but in the area between the intake and exhaust ports of the pump where there is no where for the oil to go and pressures skyrocket. Tiny bit of air and boom oil pump disintegrates. We would chalk it up to bad pumps but there is a tell tale sign of black soot from detonation in the pump housing itself. Changing to a (less) nonfoaming oil and better crank case evacuation help alleviate the problem.

But the same idea has me wondering if some of the HPFP failures are because of this very same thing. Foaming diesel fuel is pretty common and even with the best of systems it is almost guarantied at some point air is going to go threw the system.

Personally I would feel much better with a lower fuel pressure and then have the injectors do the work.

 

I agree, and there are injectors that are unit electro piezo injection injectors, that drive from the camshaft, and still deliver high pressures needed to meet emissions, BUT, they don't allow injections on the exhaust stroke, and they are a lot bigger.

 

Good news for all of us......

This Q&A is going to be extended!

Ford has been gracious enough to extend their visit with us and considering this past Friday's answers, I'm stoked about this coming Friday!!

Keep the questions coming and let's make this thread and Ford's presence here worthwhile for all involved.

 

Good deal!!

I would really like to see them answer all the unanswered questions from last week. Since there are several real good ones that got left unanswered.

 

John made me as happy as his avatar is...

 

Hello. Thanks for coming on here to talk with everyone. My question might not fit in here, but it's as close as I'll get to talking to someone who might be able to answer. I have owned 3 superdutys and one excursion. I need the cab room of the excursion, but the capabilities of the truck. So my question is, is there a chance of ever getting a bigger cab like, dare I say, the megacab? Even f150's cab is bigger than the superduty. I'm looking to get my fourth superduty, but the cab size of the megacab is drawing me in. I've been trying to hold off, so is it pipe dream of mine, or is one in the works that I can wait for?
Thanks
Clarence.

 

I saw this question asked already, and I would like to know more as well...what has been done to increase roll over protection on the 2015 Super Duty? And in general, what has been done to increase safety and crash protection in the 2015 Super Duty?