Official Blown Motor Thread

[Cknight199]

Okay so I'm looking to gather info on motors, more specifically Lbz but any will do. When yours blew what mods were done to it, what hp and 1/4 mile time, how many miles, who tuned it, what blew in the motor, how long it lasted at that power level, daily driver or not, etc.

Hopefully from this we can see what works and what obviously isn't working out too well. Maybe there are some dots that can be connected and linked back to motor failures. This could go nowhere, but it's worth a shot and regardless it would be a great information thread.

Thanks,
Caden

*i put this thread here because it seemed most fitting but if a mod thinks it belongs somewhere else feel free to move it

 

[TheBac]

You've been here long enough to know what blows these engines up. Most people tell what happened in their build threads.

 

[paint94979]

You've been here long enough to know what blows these engines up. Most people tell what happened in their build threads.

x2

 

[DieselmafiaLLY]

x2

X3

 

[matt78]

4094 turbo,rdl uppipes,exhaust, k and n intake,egr delete, 60 overs,single stock cp3. The night it blew I was running 8.0-8.2 1/8th mile passes. It was about 92 degrees at 10 p.m. Cracked #7.

 

[L0B6Z]

4094 turbo,rdl uppipes,exhaust, k and n intake,egr delete, 60 overs,single stock cp3. The night it blew I was running 8.0-8.2 1/8th mile passes. It was about 92 degrees at 10 p.m. Cracked #7.

what tuning

 

[matt78]

Texas performance diesel

 

[LWATSON]

Ive heard high egt's contribute to cracked pistons especially LBZ's. One of the reasons I went with a big single fixed charger was I felt my EGT's would be lowest with this setup. It seems the variable chargers tend to run with higher temps and also the small fixed chargers. I'd be interested to know charger setups on failed engines it would be hard to contribute a turbo setup to a failure but would still be interesting info.
.

 

[jliddle]

s475, 60's, wicked cp3, studs, profab. Ran ~6k miles on the street. Switched tunes from Diesel Addiction to PPEI and it broke #7 rod in half, putting two holes in the block.

 

[LWATSON]

Any idea where the wicked cp3 put you on HP?

 

[jliddle]

We dyno'ed at Rudys in March on that exact setup w/ Korys tunes ( that didnt feel no where near as strong as Dustins ) and it made 697/1100ish

 

[Cknight199]

You've been here long enough to know what blows these engines up. Most people tell what happened in their build threads.

So why not bring all the info to one thread?

 

[LWATSON]

We dyno'ed at Rudys in March on that exact setup w/ Korys tunes ( that didnt feel no where near as strong as Dustins ) and it made 697/1100ish

Torque seems low enough, luck of the draw I guess?

 

[hondarider552]

So why not bring all the info to one thread?

Because the info is already here if you look for it. Ill give you a hint.. has to do with cranks breaking.

 

[Cknight199]

Ive heard high egt's contribute to cracked pistons especially LBZ's. One of the reasons I went with a big single fixed charger was I felt my EGT's would be lowest with this setup. It seems the variable chargers tend to run with higher temps and also the small fixed chargers. I'd be interested to know charger setups on failed engines it would be hard to contribute a turbo setup to a failure but would still be interesting info.

.

I've seen a truck bury their 1600* gauge making a pass. They asked their tuner and he said if it doesn't have high egt's then it's not fueling hard enough. Granted it was a 118mph pass. Mine is around 1500-1600 at the end of a pass as well.

 

[jliddle]

Torque seems low enough, luck of the draw I guess?

IMO it was the later tunes that did it in. It was on Dustins tunes for 2 years before grenading on Korys. It had a bad rattle at certain RPM's on his tunes that we were trying to cure.

But I am no expert so take my diagnosis with a grain of salt haha

 

[LWATSON]

When I had my stock charger I'd bury my 1600* gauge way before the end of a 1/4 mile run.

 

[L0B6Z]

maybe we can also see if any sled pullers have blown a motor pulling? I don't drag race but pull alot.. 1700 is a common weekend thing for me, 3 times a night.. I've gone higher

 

[LWATSON]

IMO it was the later tunes that did it in. It was on Dustins tunes for 2 years before grenading on Korys. It had a bad rattle at certain RPM's on his tunes that we were trying to cure.

But I am no expert so take my diagnosis with a grain of salt haha

Well that sux, You got it back together and sorted out?

 

[Cknight199]

maybe we can also see if any sled pullers have blown a motor pulling? I don't drag race but pull alot.. 1700 is a common weekend thing for me, 3 times a night.. I've gone higher

I've somewhat inclined to believe that Lbz piston failures could be related to high drive pressure.