6.7 Twin Turbo Setup

Morgan@Midwest Diesel & Auto · Mar 4, 2015

Dan said:
Crank flex sounds made up

You don't think there was some excessive cylinder pressure?

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shmoozer · Mar 4, 2015

ncollins64 said:
Morgan I can actually say I've learned quite a bit from you on here.

Completely agree. That's why I love this place. So much to learn!

-KCCO-

Default15405 · Mar 4, 2015

Morgan@Midwest Diesel & Auto said:
How would adding main studs make the block structurally stronger? Your not adding material to the block. In fact it puts more stress on the block, and distorts the main bores.

I don't have enough experience to go off of so bear with me I'm just picking your brain here. I get that no material is being added but it seems that adding a larger, higher quality stud in every sense would make a bottom end a bit more rigid and at the very least allow the bottom end to handle full load longer before it blows. And I assumed that if they had the engine out of the truck it wouldn't be a big deal to get it align honed with the studs getting rid of the distortion.

PDT1081 · Mar 4, 2015

Default15405 said:
I don't have enough experience to go off of so bear with me I'm just picking your brain here. I get that no material is being added but it seems that adding a larger, higher quality stud in every sense would make a bottom end a bit more rigid and at the very least allow the bottom end to handle full load longer before it blows. And I assumed that if they had the engine out of the truck it wouldn't be a big deal to get it align honed with the studs getting rid of the distortion.

It's a play on words. Studs will make the "bottom end" stronger, but they won't make the "block" stronger.

Studs are needed when bolts are not strong enough, and stretch. This goes for any bolts in the motor. If they are not stretching bolts, the bolts aren't failing. If a bolt (or any part) isn't failing, putting a stronger one in its place isn't going to make a difference.

97stoker350 · Mar 4, 2015

So those glowplugs were about say bye bye or already did?

Six_Sloww · Mar 4, 2015

Looks like they were on their way to ejection.

bigrpowr · Mar 4, 2015

Morgan@Midwest Diesel & Auto said:
You don't think there was some excessive cylinder pressure?

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what other force could do such a thing ? the crank sure as hell has nothing to do with that.

Inline6359 · Mar 4, 2015

Things that make you go hmmmm

Wayne · Mar 4, 2015

bigrpowr said:
what other force could do such a thing ? the crank sure as hell has nothing to do with that.

:lookaround:

LOL that wasn't it. I think this is something better left to speculation. Odds are somebody will nail it within 10 guesses or less, but I won't be the one to confirm specifically.

Morgan@Midwest Diesel & Auto · Mar 5, 2015

Must be faulty glow plugs....

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SDS97_7.3 · Mar 5, 2015

I don't understand the secrecy at all. Just say what the hell it was

bigrpowr · Mar 5, 2015

Morgan@Midwest Diesel & Auto said:
Must be faulty glow plugs....

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I used those ARP custom age glow plugs. so far, so good !

Wayne · Mar 5, 2015

SDS97-7.3: It's a matter of finger pointing that I simply want to avoid. People seem to be so sensitive these days, and I hate to walk on eggshells, so I choose to avoid that discussion entirely. Too much flinging of poo in this thread anyway. Suffice it to say had we been aware, the problem would have been avoidable when it blew up at dpc and when I was doing the "break in". It's also something unique to this truck that I don't see happening again for Dan, or anyone else for that matter. Rest easy my friend. You're more likely to find John Wayne in a gay bar than see this scenario again.

Morgan@Midwest Diesel & Auto · Mar 5, 2015

Yeah, those arp glow plugs are very resistant to cylinder pressure from what I hear.

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Morgan@Midwest Diesel & Auto · Mar 5, 2015

Wayne said:
Rest easy my friend. You're more likely to find John Wayne in a gay bar than see this scenario again.

Quote of the week

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Jonnydime · Mar 5, 2015

Wayne said:
SDS97-7.3: It's a matter of finger pointing that I simply want to avoid. People seem to be so sensitive these days, and I hate to walk on eggshells, so I choose to avoid that discussion entirely. Too much flinging of poo in this thread anyway. Suffice it to say had we been aware, the problem would have been avoidable when it blew up at dpc and when I was doing the "break in". It's also something unique to this truck that I don't see happening again for Dan, or anyone else for that matter. Rest easy my friend. You're more likely to find John Wayne in a gay bar than see this scenario again.

The only things in common with this motor and the one at dpc are the source of the engine and maybe tuning. Right?

Bustedknuckles · Mar 5, 2015

High drive pressure is usually a result of poor tuning or a serious exhaust restriction whether its the turbos or something blocking exhaust flow. My guess is exhaust restriction as he said its a very odd issue...

packin45 · Mar 5, 2015

Bustedknuckles said:
High drive pressure is usually a result of poor tuning or a serious exhaust restriction whether its the turbos or something blocking exhaust flow. My guess is exhaust restriction as he said its a very odd issue...

Couldn't have anything to do with that bedside tail pipe could it?

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WhiteMamba_Scorpion · Mar 5, 2015

I blame Canada

97stoker350 · Mar 5, 2015

Just thinking out loud but high cylinder pressure puts a lot of strain on the bottom end components. So if the crank isn't flexing and the rods aren't bent that leaves one thing... Rod bearings