Duramax Diesels Forum Truck of the Week
  #31  
Old 07-30-2018, 09:25 PM
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zf>allison zf>allison is offline
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Originally Posted by WVRigrat05 View Post
Slight hone and another set of Lilly pistons should do it. It still ran with two missing pistons?
Well I meant one piston in each engine I've blown up.it ran fine doesn't really miss when it can't build compression. Drove it on the trailer just like when I dropped a valve. I ran an 11.3 throwing the belt losing the dual fueler and this happening with a crappy launch.this engine would need a few sleeves lol
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  #32  
Old 07-30-2018, 09:31 PM
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Lol, my LLY puked all the oil out and shook horribly, my LMM just had a slight miss. That LLY has been a hell of a motor. Those were completely stock pistons weren’t they?
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  #33  
Old 07-30-2018, 10:00 PM
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Originally Posted by WVRigrat05 View Post
Lol, my LLY puked all the oil out and shook horribly, my LMM just had a slight miss. That LLY has been a hell of a motor. Those were completely stock pistons weren’t they?
Yep 100 overs, dual fuelers, .095 jet. They lasted a long time
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04.5 single cab lly zf6 barely not stock.(the jalopy)
05 single cab lly zf6
Arp studs, welded water pump, 100 overs, dual fuelers, valair 1000 hp triple disc, danville efi live, fass 150, custom single s400 kit,
serious weight reduction
28x10x16 Hoosier slicks on pyos
Down on 2 leaves, t bolts gone.

best
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  #34  
Old 07-31-2018, 07:32 AM
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Damn, that sucks. Good luck getting it back together. Also, just an FYI for you. Since diesels don't run a throttle, they don't really have a problem running lean air/fuel ratios like a gas engine. If the belt getting thrown had anything to do with the failure, I would guess it was caused more by a drop in rail pressure causing a spike in pulse width than anything, but I think it is just as likely that the failure caused the belt to jump off. Regardless, it sucks to lose a motor, but at least it wasn't a built motor. Those are the ones that really hurt.
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  #35  
Old 07-31-2018, 08:22 AM
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Originally Posted by JoshH View Post
Damn, that sucks. Good luck getting it back together. Also, just an FYI for you. Since diesels don't run a throttle, they don't really have a problem running lean air/fuel ratios like a gas engine. If the belt getting thrown had anything to do with the failure, I would guess it was caused more by a drop in rail pressure causing a spike in pulse width than anything, but I think it is just as likely that the failure caused the belt to jump off. Regardless, it sucks to lose a motor, but at least it wasn't a built motor. Those are the ones that really hurt.
I've lost the belt both times I've run it powershifting since I rerouted it to clear a bolt head. I know without a throttle plate it would be hard to lean it out but I figured with enough spray anything is possible. I'll pull the heads and try to see for sure what was the cause to the chain reaction. Also I know it has to spike rail pressure going from a full load at around 60 psi and spray to just popping the clutch to do a gear change. The gear change a are usually very quick but I'm sure i still get some killer spikes. And yeah I don't think a built engine is in my future, at least on a stocker you know it's gonna fail eventually lol
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04.5 single cab lly zf6 barely not stock.(the jalopy)
05 single cab lly zf6
Arp studs, welded water pump, 100 overs, dual fuelers, valair 1000 hp triple disc, danville efi live, fass 150, custom single s400 kit,
serious weight reduction
28x10x16 Hoosier slicks on pyos
Down on 2 leaves, t bolts gone.

best
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dynoed 743 hp raceweight 5k with driver
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  #36  
Old 07-31-2018, 08:39 AM
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id almost think you hurt valves with the way that thing had been holding up. may have floated a few on that cyl and bent them.
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  #37  
Old 07-31-2018, 10:17 AM
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Originally Posted by Chevy1925 View Post
id almost think you hurt valves with the way that thing had been holding up. may have floated a few on that cyl and bent them.
That's my bet too with stock springs and all the boost and rpm and spray. I know I floated mine with twins at 60psi and 4500rpms in my original stock motor. The broken converter took the bearings out before the bent rods could lol! Only motor that I have actually blown up(thrown parts out of it) was my original built motor after it's second crank replacement. Had a nozzle pop the nozzle tip, where the holes are, completely off and blew everything out the side of it. Granted I was doing 115mph at 120psi boost when it popped so it was one hell of a crankcase evacuation! There was not a single piece of the piston, wrist pin, or rod in the pan, not even any oil in the pan. Everything went out the side of the block. Cost me a cam, crank, 2 rods, a piston, block, oil pans and oil pickup tube. Popping a stock motor would have been a lot easier on the pocket for sure!
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  #38  
Old 07-31-2018, 10:43 AM
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Yeah I've been known to spray the n20 on the limiter before I even dump it to launch, it really leaves hard that way which is nice. Valve problem is probably it
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04.5 single cab lly zf6 barely not stock.(the jalopy)
05 single cab lly zf6
Arp studs, welded water pump, 100 overs, dual fuelers, valair 1000 hp triple disc, danville efi live, fass 150, custom single s400 kit,
serious weight reduction
28x10x16 Hoosier slicks on pyos
Down on 2 leaves, t bolts gone.

best
10.91 at 129mph, 1.577 60 foot
dynoed 743 hp raceweight 5k with driver
Instagram-636zf6
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  #39  
Old 07-31-2018, 11:18 AM
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Have you considered putting valve relief in the pistons to be able to throw a big cam in there?
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  #40  
Old 07-31-2018, 12:21 PM
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Originally Posted by c5fourj View Post
Have you considered putting valve relief in the pistons to be able to throw a big cam in there?
Haven't thought about much other than valve springs and uppipes. Havent blown a bellow but ive stretched a few. Don't wanna dump a ton in it when I can trap over 130 on stock stuff.
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04.5 single cab lly zf6 barely not stock.(the jalopy)
05 single cab lly zf6
Arp studs, welded water pump, 100 overs, dual fuelers, valair 1000 hp triple disc, danville efi live, fass 150, custom single s400 kit,
serious weight reduction
28x10x16 Hoosier slicks on pyos
Down on 2 leaves, t bolts gone.

best
10.91 at 129mph, 1.577 60 foot
dynoed 743 hp raceweight 5k with driver
Instagram-636zf6
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  #41  
Old 07-31-2018, 12:42 PM
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just do what trent did years ago, use a router to get in there and do them . ok, he didnt do that for valve reliefs but did for delipping the pistons and it actually worked out
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James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
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  #42  
Old 07-31-2018, 12:59 PM
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Originally Posted by Chevy1925 View Post
just do what trent did years ago, use a router to get in there and do them . ok, he didnt do that for valve reliefs but did for delipping the pistons and it actually worked out
I thought the same
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  #43  
Old 07-31-2018, 02:44 PM
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I know there was chatter of Trent getting in over his head with the EPD thing but has anyone ever stayed in touch with him? I just the ol boy is doing alright in general.

His truck build thread is still one I have saved.
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  #44  
Old 07-31-2018, 02:48 PM
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Originally Posted by SmokeShow View Post
I know there was chatter of Trent getting in over his head with the EPD thing but has anyone ever stayed in touch with him? I just the ol boy is doing alright in general.

His truck build thread is still one I have saved.
i actually got back in touch with him via FB not too long ago. he works for industrial injection now as their fabrication guy on engine parts. Think he does other stuff for them as well. Still has his old black truck and was dusting it off to work on it again.
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Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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  #45  
Old 07-31-2018, 03:47 PM
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Quote:
Originally Posted by SmokeShow View Post
I know there was chatter of Trent getting in over his head with the EPD thing but has anyone ever stayed in touch with him? I just the ol boy is doing alright in general.

His truck build thread is still one I have saved.
I talked to his brother probably two years ago. He’s doing fine. Family is good. Pretty much all I got out of him.
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