6.7 carnage

[Powerstroked162]

Forged or not they look to be a pretty small rod. I dont think this motor failed catastrophically just due to the level of power the truck is at... I bet there is a little gremlin somewhere. Either way, I dont think its anywhere near as stout as a 6.4.

I've been hearing rumors of poor crank harmonics for sometime.

 

[ChattyCathy]

With as much as went into the bottom end of that engine by ford, I would surely hope to God it would hold more power than that, by a factor of 3!

6.7 DOA.

 

[jdgleason]

I've been hearing rumors of poor crank harmonics for sometime.

Really? I havent heard that. Thats gonna suck for lifespan of the motor. As well as making any kind of power or rpms later...

 

[Powerstroked162]

Really? I havent heard that. Thats gonna suck for lifespan of the motor. As well as making any kind of power or rpms later...

Yeah. I was trying to remember who i talked to about it.... regardless, they lost the crank on a low mileage engine with twins and a tune. 500-525hp ballpark

 

[jdgleason]

Ive heard a couple horror stories lately, but they seem to be hit or miss.

 

[01PSD]

Well as PSD fans... we're used to horror stories LOL

 

[Powerstroked162]

Im gonna see if I can get pictures of the piston bowls. Im curious what they look like...

 

[INFAMOUS]

Here ya go!

 

[Powerstroked162]

Here ya go!

Anthony, are those out of the blown engine? I guess I should've clarified. My bad

 

[INFAMOUS]

Anthony, are those out of the blown engine? I guess I should've clarified. My bad

Yes sir!

 

[Powerstroked162]

I see some slight piston to valve contact there..... Does the piston in the bottom picture have carbon buildup in it or is it just the shot?

The bowl is so big it's kinda hard to see any injection timing trails

 

[jdgleason]

Theres build up, but cant tell much beyond that.

 

[Worstenemy453]

I have a buddy who is Spartan tuned saying his truck tune only is doing 525. I would wager a guess at something other than just straight power caused this failure. I will be following this closely as our shop develops some stuff.

 

[Powerstroked162]

Here's a picture of the rods.

 

[HD F250]

Hmmmmm....glad I decided to keep the 6.4 and build it! I sure hope this is a fluke, I really wanted a 6.7 dually in the next few years.

 

[PTSUPERD]

Ok...just cleaned up the bs posts. I was guilty as much as anyone else.

Let's keep this one technical and on track. Thanks.

 

[MINK]

Any idea how long this setup was ran?

 

[Worstenemy453]

Is there a good rod left in that block, id like to see them next to a 6.0l/6.4 rod

 

[Powerstroked162]

Is there a good rod left in that block, id like to see them next to a 6.0l/6.4 rod

The 6.7 carries the same size wrist pin bore as the 6.0 but other than that, its totally different.

 

[Worstenemy453]

The 6.7 carries the same size wrist pin bore as the 6.0 but other than that, its totally different.

I just want to see the size comparison, if the 6.7 rod is as beefy or not.