Flatlander engine teardown begins

[Dsl_Dog_Treat]

Well I had a break in the action last night and decided to dig into Barneys Engine from "That Damn Truck" as it has been a permanent fixture in the shop for the past year.

Since we knew looking from bottom side that #7 had a scored cylinder wall, I decide to remove the passenger side head first.
Found #7 scuffed both top and bottom sides of the cylinder and to my suprise #5 also had a deep score in the cylinder wall.
Time ran out before I could get the drivers side head off so I couldn't peek at the other 4.

So here's a few carnage pics.
#5 & 7 respectively.

 

[hesutton]

Got a sneak peek at these cylinders last night and I'm wondering if those cylinders have damage secondary to getting hot, trash in the oil cooling jets, trash on the rings, or other issues. It's going to be an interesting autopsy to say the least Ron. Looking forward to the rest of the Coroner's report.

Heath

 

[wmoguy]

Is Flatlander the guy who had the compound turbo idi? With one turbo remote mounted?

 

[hesutton]

Is Flatlander the guy who had the compound turbo idi? With one turbo remote mounted?

Yes, that's the guy and this was his 6.9.

Heath

 

[wmoguy]

Yes, that's the guy and this was his 6.9.

Heath

K thx. Can we get a lil history how long it all lasted with the twins before it went caput?

 

[Dsl_Dog_Treat]

K thx. Can we get a lil history how long it all lasted with the twins before it went caput?

The stories are still floating around here.

No build specs publicly released tho as I discovered while surfing for the details on the build.

 

[hesutton]

K thx. Can we get a lil history how long it all lasted with the twins before it went caput?

Some background in this DPS built 6.9.
http://www.oilburners.net/forums/showthread.php?t=3120
http://www.oilburners.net/forums/showthread.php?t=18367
http://www.oilburners.net/forums/showthread.php?t=23350
http://www.oilburners.net/forums/showthread.php?t=25488
http://www.oilburners.net/forums/showthread.php?t=25022
http://www.oilburners.net/forums/showthread.php?t=29744
http://www.oilburners.net/forums/showthread.php?t=30127
http://www.oilburners.net/forums/showthread.php?t=30540
http://www.oilburners.net/forums/showthread.php?t=31968

Enjoy.

Heath

 

[Dsl_Dog_Treat]

Thanks Doc, those links are nearly Impossible to post from my phone.

And you found a post I was missing and must retract my earlier statement.
Thanks Heath, that just resolved a big problem I was battling on trying to find to figure proper twin turbo quest.

 

[subway]

so cool i just piddled a little

 

[Dsl_Dog_Treat]

Ok so my math sucks.
I need a math scholar here to figure what the displacement is on this animal.

Barney and I ballparked it a few years ago at 19.5:1.

Somebody care to do some number crunching here?

6.9L
Cylinders bored .040" over
Block deck shaved .005"
Heads decked .007"
Pistons milled .060"
Glow plugs will be used.

 

[hesutton]

Thanks Doc, those links are nearly Impossible to post from my phone.

And you found a post I was missing and must retract my earlier statement.
Thanks Heath, that just resolved a big problem I was battling on trying to find to figure proper twin turbo quest.

No problem Ron.

Heath

 

[Dsl_Dog_Treat]

So here's the equation.

CR= ((Pi/4)x b2 x s+Vc)/Vc

Where b= cylinder bore = 4.060
Where s= piston stroke = 4.18
Where Vc= Clearance volume = ?????

Where I'm stuck at the moment is clearance volume. Since the heads have been cleaned up, this may be a rough guestimate number.

Working.........

Clearance volume = Swept volume/Compression ratio -1
Vc= SV/CR-1

Swept volume(SV) = Pi x r2 x stroke =53.583

Engine displacement(ci) = r2 x Pi x stroke x # cylinders
ci= 4.1209 x 3.1415926 x 4.18 x 8 = 428.67

Dang I hate algebra!!!!

 

[sle2115]

I'm gonna say that with that much machine work being done, anything short of measuring is going to be a WAG anyway. Do you have a way to flow some diesel out of a syringe into the combustion chamber and valve reliefs? If you can level one side of the block, then run a piston up to tdc, then use a syringe to fill the reliefs and such with diesel, take note of how much you used, then do the same to the head. I'm guessing it's gonna be very small on the cylinder head, but without cc'ing everything, it's going to be a guess. Every person I've seen do a valve job does it slightly different, how they cut the valve bowl, etc. If it's critical, then it's time to cc! lol

Also need to include head gasket thickness, which I know you are aware of.

 

[hesutton]

With 40 over pistons I calculated the displacment at 428.45 cubic inches.

I'm sure you've seen THIS THREAD, but it's got some good info on calculating the CR of an IDI.

Heath

 

[Dsl_Dog_Treat]

Dangit!!! I used a wrong number... Ugh
Told ya I hate algebra.