6.7 carnage

Worstenemy453 · Feb 10, 2012

Whats the status on rods and who is making them ?

UpstateDieselGuy · Feb 11, 2012

As I have now had this truck since August I have made some observations.

First off, this thing has a tremendous amount of low end. I am still surprised as how it feels from a stop.

Second, this thing loves to lug down. I have to make it downshift more than I have any other diesel pickup with an auto. It is nothing for the converter to be locked in overdrive at about 45-50 MPH and be lugging along at 8-900 RPM. It will do this all of the time and you have to give it a fair amount of throttle to get the converter to unlock and down shift. I am amazed at how it can pull itself out of the hole without downshifting, like a straight 6, however with additional power that can become devastating to the truck, engine, trans, driveline, etc. I am just wondering if the lugging nature of this engine is going to be watched carefully and altered with tuning. Just some thoughts.

Chris

Derek@Vision Diesel · Feb 11, 2012

UpstateDieselGuy said:
As I have now had this truck since August I have made some observations.

First off, this thing has a tremendous amount of low end. I am still surprised as how it feels from a stop.

Second, this thing loves to lug down. I have to make it downshift more than I have any other diesel pickup with an auto. It is nothing for the converter to be locked in overdrive at about 45-50 MPH and be lugging along at 8-900 RPM. It will do this all of the time and you have to give it a fair amount of throttle to get the converter to unlock and down shift. I am amazed at how it can pull itself out of the hole without downshifting, like a straight 6, however with additional power that can become devastating to the truck, engine, trans, driveline, etc. I am just wondering if the lugging nature of this engine is going to be watched carefully and altered with tuning. Just some thoughts.

Chris

Very good point!! Thanks for sharing

wetnsloppy4x · Feb 11, 2012

I'm looking at these pics on my phone so maybe I'm missing some detail, but I thought I'd float this idea out there....

FWIW, that looks more like a catastrophic piston failure to me. It looks like the wrist pin split the pin boss and took the bottom half of the piston with it. The rod looks like it may have just been collateral damage.

Can someone point out in the pics the failure mode to disprove this theory? I'm certainly not arguing that those rods look a little on the skinny side, it just appears that there is a pretty clean fracture around the bottom half of that piston. From what I can see, it doesn't look like the rod beat it to death from underneath.

INFAMOUS · Feb 11, 2012

Worstenemy453 said:
Whats the status on rods and who is making them ?

I was told Crower.... 6-8 Weeks

Bustedknuckles · Feb 11, 2012

I know its terrible but i just have to lol. Ford just can't win with there diesels!

But I can't talk, I drive a Lb7

Worstenemy453 · Feb 11, 2012

INFAMOUS said:
I was told Crower.... 6-8 Weeks

Maybe Tadd will have called me back by then.

oke:LOL

JK, i know he is busy, ill get in touch with Crower.

96stacked&smoken · Feb 11, 2012

550 with bolt ons still sounds amazing to me but i drive a 7.3.lol are any stock trucks haveing these same problems?

quicksilver11 · Feb 12, 2012

UpstateDieselGuy said:
As I have now had this truck since August I have made some observations.

First off, this thing has a tremendous amount of low end. I am still surprised as how it feels from a stop.

Second, this thing loves to lug down. I have to make it downshift more than I have any other diesel pickup with an auto. It is nothing for the converter to be locked in overdrive at about 45-50 MPH and be lugging along at 8-900 RPM. It will do this all of the time and you have to give it a fair amount of throttle to get the converter to unlock and down shift. I am amazed at how it can pull itself out of the hole without downshifting, like a straight 6, however with additional power that can become devastating to the truck, engine, trans, driveline, etc. I am just wondering if the lugging nature of this engine is going to be watched carefully and altered with tuning. Just some thoughts.

Chris

That's why I lock mine out of 6th until I'm over 60. I did the same with my dodge.

bigrpowr · Feb 12, 2012

Powerstroked162 said:
No. I have it on good word that they weren't making 600hp at the wheels. They were running into the same issues as everyone else.

Nate, don't take it like I'm trying to dog the 6.7... I have spent a lot of time studying the books and layouts for some time now and I'm excited for the new engine to make some positive progress BUT things like this can deteriorate enthusiasm when they let go sub-550hp with just bolt on's. I honestly don't foresee this platform following the footsteps of its 6.4 counterpart when it comes to bolt and go performance. Atleast not right now

it was over 600 but not by much. ford did the development for the guy. info is from the ford engineer.

SEABEE08FX4 · Feb 12, 2012

I heard it was at the crank and not at the wheels that they quoted the 600 hp.

bigrpowr · Feb 12, 2012

SEABEE08FX4 said:
I heard it was at the crank and not at the wheels that they quoted the 600 hp.

i believe it was 700 at the crank.

wetnsloppy4x · Feb 13, 2012

wetnsloppy4x said:
I'm looking at these pics on my phone so maybe I'm missing some detail, but I thought I'd float this idea out there....

FWIW, that looks more like a catastrophic piston failure to me. It looks like the wrist pin split the pin boss and took the bottom half of the piston with it. The rod looks like it may have just been collateral damage.

Can someone point out in the pics the failure mode to disprove this theory? I'm certainly not arguing that those rods look a little on the skinny side, it just appears that there is a pretty clean fracture around the bottom half of that piston. From what I can see, it doesn't look like the rod beat it to death from underneath.

Sooooo, no comment?

I'm looking at the pics on my 25" desktop monitor now and it still looks like the bottom half of the piston got yanked off, not pounded off.

morefuel · Feb 13, 2012

wetnsloppy4x said:
Sooooo, no comment?

I'm looking at the pics on my 25" desktop monitor now and it still looks like the bottom half of the piston got yanked off, not pounded off.

That is kinda what it looks like. But then the pics show the other rods were bent also.

SEABEE08FX4 · Feb 13, 2012

wetnsloppy4x said:
Sooooo, no comment?

I'm looking at the pics on my 25" desktop monitor now and it still looks like the bottom half of the piston got yanked off, not pounded off.

There's a million things it could be, the pics don't show enough to tell. I'm sure it will come to light soon though.

SEABEE08FX4 · Feb 13, 2012

bigrpowr said:
i believe it was 700 at the crank.

I'm not sure man, that's just what I heard.

wetnsloppy4x · Feb 13, 2012

morefuel said:
That is kinda what it looks like. But then the pics show the other rods were bent also.

True. Any way you slice it, that's not encouraging. I still hold high hopes for this engine though.

utlonghorns416 · Feb 15, 2012

subscribed

Marty · Feb 18, 2012

I'm going to agree the rods look skinny. The fact the rods are bent tell me the piston damage came later.

Powerstroked162 · Mar 13, 2012

I guess I should go ahead and add that the turbo kit from Industrial on this truck uses a s400 charger. Not sure where I came up with a K31 now that Im looking back on it. If I recall though the first twin kit they had in testing used that charger, I even think we had a thread about it on PSN, I'll have to look. Regardless, the production based kit comes with an S400 atmosphere, to correct a previous post I had made in here.

I also heard that Crower is making rods for these engines and there are Mahle replacement pistons available as well. Absolute also has pushrods ready for you 6.7 boys as well