107,000 boosted miles comes to an end!
08-12-2010, 06:59 AM
#21
It ran different power levels throught its life with most of its time spent between 12-15 psi which would produce 7-800 flywheel hp. I had a valet switch on it that cut the boost to 5psi that I used when I towed my trailer or valet parked it. I would see 20psi once in awhile for fun on the streets and a couple times on Power Tour. It ran 11.4X on 19 psi at 5500 pounds at a Silverado SS meet here in Michigan around 2006-2007 I think, the engine was installed in 2002.
Kurt
Kurt
Thats a impressive life that engine lived. 
08-12-2010, 07:29 AM
#22
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Your lifter looks about like mine did when it failed:
https://ls1tech.com/forums/generatio...-now-pics.html
https://ls1tech.com/forums/generatio...-now-pics.html
08-12-2010, 09:46 AM
#25
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Here is a few more pictures, including the truck with heart removed!
The pistons look good and the second ring had only used about half of the taper, still had some life left. The bearings have some impregnated trash in the babbit as you would expect at this wear level. I did use a standard main bearing in this build back then because I knew high miles was the goal and they lived well. The thicker babbit overlay was useful with the low amount of oil changes, as I only changed oil when the computer told me which seemed to happen between 5-7500 miles depending on trailer towing.
Kurt
The pistons look good and the second ring had only used about half of the taper, still had some life left. The bearings have some impregnated trash in the babbit as you would expect at this wear level. I did use a standard main bearing in this build back then because I knew high miles was the goal and they lived well. The thicker babbit overlay was useful with the low amount of oil changes, as I only changed oil when the computer told me which seemed to happen between 5-7500 miles depending on trailer towing.
Kurt
08-12-2010, 09:53 AM
#28
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The truck is getting a fresh engine that is just a copy of the original with a few refinements that I have learned over the years since it was built, then probably a new owner!
Kurt
Kurt
08-12-2010, 10:43 AM
#30
Wow, 107k on a turbo engine? I see that you put the new motor in at 27 miles, I have to ask, what did you have done to that engine to get it to last that long at those boost levels? Rods, pistons, cam for the original build? And what are the new tricks you have learned about the turbo set up's. I am thinking about doing a gt45 on my silverado, and any tricks that will help would be appreciated.
08-12-2010, 11:12 AM
#32
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Most of the stuff I have changed is common now, but no boosted engines in 2002 were running daily driver with durability as a main concern.
Piston to wall: I ran this engine .001 looser than called out clearance from Mahle. My thoughts at the time was thermal expansion causing the piston to gall in the bore as I did not have piston oilers and I thought the thermal expansion in boost might bite me. A few years later I did some scuff testing running the bore clearance down pretty low and found out I did not need the additional clearance. I was running the piston very close to round so it would throw heat better, that turned out to be a good thing for long life. The drawback of the higher clearance and centered wrist pin was the engine sounded like a diesel when it was cold outside and towards the end always sounded like a diesel!
I ran a wider ring package to throw more heat and help with durability, this appears to have not been needed as the engine still has good taper left on the second ring and the top ring is highly polished and looks great. The engine never did consume oil, normally going oil change to oil change on one added quart or less. The new engine has a narrower napier second ring and offset pin that should help fuel MPG and quiet the engine down even cold.
The new engine will get the LS9 head gasket also as tracks are evident that it pushed by the stock 6.0 gasket at some point. The engine did see one or two runs on the freeway where it was WOT for 2 min bursts and also countless times with the trailer on it's back that it would see 2-4psi for 2-3 minutes straight pulling grades. Sometimes pulling grades I would hear a little knock after a few minutes as I normally towed on midgrade fuel, it always had 92 octane plus when it was without trailer.
Kurt
Piston to wall: I ran this engine .001 looser than called out clearance from Mahle. My thoughts at the time was thermal expansion causing the piston to gall in the bore as I did not have piston oilers and I thought the thermal expansion in boost might bite me. A few years later I did some scuff testing running the bore clearance down pretty low and found out I did not need the additional clearance. I was running the piston very close to round so it would throw heat better, that turned out to be a good thing for long life. The drawback of the higher clearance and centered wrist pin was the engine sounded like a diesel when it was cold outside and towards the end always sounded like a diesel!
I ran a wider ring package to throw more heat and help with durability, this appears to have not been needed as the engine still has good taper left on the second ring and the top ring is highly polished and looks great. The engine never did consume oil, normally going oil change to oil change on one added quart or less. The new engine has a narrower napier second ring and offset pin that should help fuel MPG and quiet the engine down even cold.
The new engine will get the LS9 head gasket also as tracks are evident that it pushed by the stock 6.0 gasket at some point. The engine did see one or two runs on the freeway where it was WOT for 2 min bursts and also countless times with the trailer on it's back that it would see 2-4psi for 2-3 minutes straight pulling grades. Sometimes pulling grades I would hear a little knock after a few minutes as I normally towed on midgrade fuel, it always had 92 octane plus when it was without trailer.
Kurt
Wow, 107k on a turbo engine? I see that you put the new motor in at 27 miles, I have to ask, what did you have done to that engine to get it to last that long at those boost levels? Rods, pistons, cam for the original build? And what are the new tricks you have learned about the turbo set up's. I am thinking about doing a gt45 on my silverado, and any tricks that will help would be appreciated.
08-13-2010, 02:27 PM
#37
FormerVendor
No, just a driver.
08-13-2010, 03:02 PM
#38
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Your lifter looks about like mine did when it failed:
https://ls1tech.com/forums/generatio...-now-pics.html
https://ls1tech.com/forums/generatio...-now-pics.html
08-15-2010, 02:03 PM
#40
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Well, you did a great job putting that motor together for it to last that long with out issues.. And those times from a truck of that weight is really impressive..
