2015 ford 6.7 Turbo

Turtle n Peeps wrote:
Ford spec'ed the wheels on the turbo on the 6.7 really strangely. They were really hard to balance and they had a ton of failures with them so I'm sure they wanted to fix that problem.

Pfff really. Never heard of that one before. In fact besides Ricatic's truck, the 6.7L PSD has been a solid performer. Not saying all of them had 0 trouble but the Ford built motor is a major improvement over the 2 previous Navistar.

"a ton"... :R

I hope they get their exhaust brake right this time.

mich800 wrote:

ScottG wrote:

mich800 wrote:

ScottG wrote:
Bigger turbo doesn't mean better. Many guys install smaller turbo's for better performance.

Just curious, who is installing smaller turbos on the new trucks to gain performance?

A smaller turbo spools quicker and reaches higher rotation speeds for a given fueling level because it has lower drive pressure. The big three have gone up and down in size over the year because of many different reasons including controlling boost, emissions and drivetrain longevity. These changes were often made at the expense of performance so guys would either alter the existing turbo with a new housing or replace it entirely. Unless they add lots of fuel, a bigger turbo is a detriment to performance. Even then it often causes smoke at heavy throttle and low boost conditions. So as you can see it's a trade off when it comes to sizing and manufacturers play around a lot with it.

I know that. I just have not heard of anyone changing to a smaller turbo on a modern stock engine because the performance was off due to too big.

X2, you just don't go to a smaller than stock turbo to get more performance. Air flow and fuel flow is the name of the HP game and to get more air flow you need a bigger turbo.

The big question is, is the 15 Blue Oval going to put out more HP? I say yes; but that is just a WAG. Despite what people say on here, HP sells and people love bragging rights.

DUO_CORE wrote:
Did they get rid of the ceramic ball bearings in the turbo yet?

http://www.youtube.com/watch?v=hioVGEIegTQ&feature=c4-overview&list=UUQz2vFEc1m-WGKf6g-pz9DA

It's not a problem with the ceramic ball bearings. They have been around for years with good results. It's a problem with the wheels that Ford spec'ed that is taking the turbo's out.

ScottG wrote:

mich800 wrote:

ScottG wrote:
Bigger turbo doesn't mean better. Many guys install smaller turbo's for better performance.

Just curious, who is installing smaller turbos on the new trucks to gain performance?

A smaller turbo spools quicker and reaches higher rotation speeds for a given fueling level because it has lower drive pressure. The big three have gone up and down in size over the year because of many different reasons including controlling boost, emissions and drivetrain longevity. These changes were often made at the expense of performance so guys would either alter the existing turbo with a new housing or replace it entirely. Unless they add lots of fuel, a bigger turbo is a detriment to performance. Even then it often causes smoke at heavy throttle and low boost conditions. So as you can see it's a trade off when it comes to sizing and manufacturers play around a lot with it.

I know that. I just have not heard of anyone changing to a smaller turbo on a modern stock engine because the performance was off due to too big.

Did they get rid of the ceramic ball bearings in the turbo yet?

http://www.youtube.com/watch?v=hioVGEIegTQ&feature=c4-overview&list=UUQz2vFEc1m-WGKf6g-pz9DA

Sign me up for a larger turbo... :B

Link

N-Trouble wrote:
What are they replacing the CP4.2 with? GM has had far less failures and will carry over everything to the new 15' model.

I do not believe Ford is changing HPFP's from the current Bosch CP4.2 series. Ford has quietly been trying to improve HPFP reliability through several introductions of "upgraded CP4.2 components...there have been several part number changes...but still no admission that they have a problem even though it is well known that Ford has warranty issues with their HPFP system...

The HPFP upgrades can only be a good thing...and is the likely reason that the number of HPFP failures in later model years, after 2011, appear to be lessening...this is a good thing for later model year owners but leaves early purchasers holding the "no warranty" bag...Shame on Ford

While you mentioned Gm failures as less in numbers, my experience after talking with both the lead Ford 6.7 engineer and other engineers that work daily with Bosch and their fuel systems is different. Also, the myriad of manufacturers that provided answers to questions in the NHTSA investigation into the Bosch CP4.xx series fuel systems show uniform failure rates across the board. One engineer, after a visit to Bosch headquarters, told me the pallet full if Bosch CP4.2's from GM was similar in number to the Ford pallet full sitting right next to it.

What does this mean...simply put...GM has stepped up to the plate and kept all their CP4.2 pump failure customers well taken care of...After long research, it is my finding that one will have a difficult time finding any GM CP4 failures...and will not find any GM CP4 failures that were not warrantied...but maybe the Blue KoolAid group will dig one up :B

Regards

mich800 wrote:

ScottG wrote:
Bigger turbo doesn't mean better. Many guys install smaller turbo's for better performance.

Just curious, who is installing smaller turbos on the new trucks to gain performance?

A smaller turbo spools quicker and reaches higher rotation speeds for a given fueling level because it has lower drive pressure. The big three have gone up and down in size over the year because of many different reasons including controlling boost, emissions and drivetrain longevity. These changes were often made at the expense of performance so guys would either alter the existing turbo with a new housing or replace it entirely. Unless they add lots of fuel, a bigger turbo is a detriment to performance. Even then it often causes smoke at heavy throttle and low boost conditions. So as you can see it's a trade off when it comes to sizing and manufacturers play around a lot with it.

ScottG wrote:
Bigger turbo doesn't mean better. Many guys install smaller turbo's for better performance.

Just curious, who is installing smaller turbos on the new trucks to gain performance?