The effects of PI disable are noisier idle and possibly increased emissions at idle.

Correct that power/torque/response are unaffected.

Hope this helps

 

Yeah the deal on the extras is that Ford willl allow the dealership to make the swap. The funny thing is that I demanded a new truck because the dealer couldn't put the first truck back together properly. They couldn't hang the bumper square or get the headlights in or who else know's what they did wrong. So the bottom line is I'm going to swap everything but the leaf springs myself and let them do the springs. They're extrememly hard and time consuming so I'll let them play with them.

 

Your argument, relative this "level/quality of workmanship", supported the position that there was reasonable expectations that the rest of the work, performed on the truck, could be described as lacking confidence. I sense that no reasonable argument against this position could be supported by any rationally thinking person -- even at Ford or at the dealership.

 

Do you guys know why the VT365 (6.0L) is only 235 hp and 440#'s TQ?
thanks.
Mean Gene

 

IMHO its marketing. Ford, Chevy and Dodge are in this big battle to see who can have the most powerful truck (and car) each year. So they go out and Hot rod the motors they have so they can brag in there commercials about the most Hp & Torque of any motor.

International on the other hand built this motor to meet the new EPA standards that are coming on line, however, since International is not in this game with the Big Three over highest Hp & Torque, they tune the motor to be powerful enough for there intended use in the medium duty and RV market, yet still be very reliable and fuel efficient. The VT365 version that International uses doesn't have the problems that Ford has with there version. The VT365 was in production and use two years before the Ford PSD version.

Once Ford and the others start increasing the Hp & Torque on there version of these motors with tuning, the engines start running closer to there ragged edge, with the consequence of decreased reliability and fuel efficiency.

Just my $.02

 

Blackhat, Ford uses the same engine in the f250s through the F550s. The programming is different. That is where the HP/Torque comes from. According to a Ford engineer I spoke with, the 6.0 can go up to 2x what is set up in the 250.

 

I don't know about anyone else, but PI is alive and kicking in my truck. Quiet at idle, touch the throttle and it gets noticible louder without any appreciable increase in rpms.

I was having a rough idle problem that turned out to be corrected with lowering the oil level a tad (very sightly over full). Took it into the dealer and asked about reflash. My truck (04 engine) has all the appropriate flashes up thru dec. The dealer reflashes all his trucks before they go out the door new.

 

[b]JV[b]
My rebuttal would be that all of the other input on this subject leans considerably towards this not to be the case, with support from the fact you claim that the truck has gone through all of the appropriate re-calibrations (re-flashs).

Your truck would have to be the rare exception..

 

So if my truck romps at idle, then it has PI?

 

There was another member that has a avi/mpeg file of his truck demonstrating PI. Mine does and sounds the same.

 

 

SBV45, yes i agree that FMC uses the same 6.0 in the F250s-F550s, however, in rebuttle, the programming is the same in all these trucks as they all have the same Hp and Torque.
The programing and engine mechanicals are different on the 6.0 in the E-series of vans however, do to space limitations. In the E-series, the 6.0 is much closer to the International VT265 in spec.

And yes i agree ford gets the increased Hp & Torque through programming (tuning) as i also stated in my previous post.

I don't disagree with this statement from the FMC engineer in fact, it supports what i said in my previous post about FMC, Chevy and Dodge being in a Hp/Torque battle. You can Hot rod any engine through tuning and different performance parts. However the trade off is lower fuel efficiency and lower reliability on the High Performance motor. You can take the 350 series of gas motors and make them produce 200 to over 1000Hp, as an example, but the trade off is reliability and fuel efficiency and increased emissions.

In my previous post i was responding to ebarx007 question as to why the International VT365 is specd at 235Hp & 440Tq but the FMC 6.0 PSD is specd at 325HP & 560Tq. The 6.0 PSD is the VT365 on steroids. This High performance increase was done by FMC not International through programming and turbo changes. The programming that FMC has done is where they are having all of there problems. International does not have these problems with their version (VT365) of this motor.
Here is a quote from the FMC 04 SD brochure "The power of the 6.0L PS is Truly Astounding with anUnbelievable 560LB-FT or torque and 325 HP, it Boastsbest-in-class numbers"

I am not trying to be argumentative here or slam FMC just clarifying the opinion i posted in response to ebarx007 earlier

IMHO i think FMC will eventually get the bugs worked out of their programming, etc of the 6.0 PSD given enough time. But, i don't think they will ever get the longevity or fuel efficiency that the International VT365 will have due to its lower state of tune. Just my $.02

 

Not necessarily, PI can cause a rolling idle, however, oil level & viscosity, outside temperature, fuel quality are some of the other things that can cause the engine to "romp".

If you still have PI enabled, the truck will idle at a lower sound level and then when the RPM's are increased slighty by a press on the accel pedal the engine will get noticebly louder.

Hope this helps.

 

here's another consideration. Any yahoo can buy an F-250 wih the 6.0 and run the snot out of it. Most people buying a van or International are buying it for a purpose and not becuase the guy across the street bought one. When you have a purpose and actually care for your truck you tend to treat it a little better. There's planty of posts about guys racing there trucks and beating the hell out of them (myself included). Although Ford certainly does have mfg. problems and are turning out poor engines (again, myself included) I think some of the problem can be attributed to the total qty. of trucks beign pushed out the door and who's buying them and how they are treating them. I'm not sure if my truck has a rev limiter but I'm sure someone reading this knows and they probably also know when it kicks in..... Just my $0.02

 

alfie623,

I agree with your sentiments whole heartedly. I have had and still have vehicles that have High Output motors, and i live with the trade offs. IMO i think some of the people want both peak high performance and longevity. Unfortunately those two rarely go hand in hand. If someone wants a 500k plus motor life then hot rodding probably is not in order. Just my $.02

I am not aware of a rev limiter on the SD but they do have a speed limiter set at about 95-100 mph. I have heard of people trying to bypass these to run faster at the friday night drags.