Duramax Diesels Forum Truck of the Week
  #31  
Old 06-18-2017, 06:00 PM
cardiac cardiac is offline
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No, Mark did not drive the truck with the 60s I sent him the ECM and he put his tune in and shipped it back. When it didn't change anything we talked and he said he needed to have the truck out at his shop to look at it, and at this time thats not possible. I took the truck back to Torque Diesel after changeing the injectors back to the 30s. He was able to get it to where it don't smoke at 70 as long as you don't hammer it or stop and take off.
What would be max boost on the 68mm turbo, at WOP I only get 38 and still have smoke coming out in #5 I thought it should be in the 40s?
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  #32  
Old 06-18-2017, 06:15 PM
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38 is about right.
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  #33  
Old 06-19-2017, 08:13 AM
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Just thinking to myself. If I were you, and was able to do my own tuning, I would stretch the pilot timing out to 25* or so BTDC. I'd back the main timing down to 2.5-3*BTDC, and run 12kpsi minimum in cruising areas. With the pilot timing that far out you could use 40-45 %BTDC for cruising and part throttle areas. Might help clean it up getting the spray into the oval bowls a bit better. Obviously the higher fuel pressure helps larger injectors but the big help is spray penetration for the pilot.
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  #34  
Old 06-19-2017, 08:43 AM
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You need to take the truck to Mark and let him tune it. I'm 75% sure it is the pistons causing it, but someone who is experienced tuning oval bowls (like Mark) should be able to get the smoke to an acceptable level.
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  #35  
Old 06-19-2017, 08:45 AM
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Quote:
Originally Posted by JoshH View Post
You need to take the truck to Mark and let him tune it. I'm 75% sure it is the pistons causing it, but someone who is experienced tuning oval bowls (like Mark) should be able to get the smoke to an acceptable level.
I said it earlier in the thread but Mark tunes my truck(via email) with ovals and bigger injectors and I have no issues with smoke.....
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  #36  
Old 06-19-2017, 09:07 AM
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I have ovals and 400% overs and I can get mine pretty clean if I want to. if I lay into it hard it, it will smoke hard but clean up completely. at 70 on the freeway it has a little haze but not bad. I messed with my MAF signal to make mine spool up. I wonder if someone is overlooking that table?
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  #37  
Old 06-19-2017, 09:12 AM
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Quote:
Originally Posted by TROJAN366 View Post
I said it earlier in the thread but Mark tunes my truck(via email) with ovals and bigger injectors and I have no issues with smoke.....
And I said it earlier that those oval bowl pistons run dirty. Not all trucks are the same and not everyone has the same acceptability of smoke. I'm not calling you a liar, but one person's "no smoke" isn't the same as the next. I've seen trucks that a person says "doesn't really smoke", and I think it's very dirty. All I know is every truck I've been around that has oval bowls runs quite a bit dirtier than the same truck with round bowls, and it sometimes takes somewhat unconventional tuning to clean it up. I may not have the experience with the oval bowls that some on here have, but I have seen enough to know they're a different animal. I'm just pointing at something I know can cause smoke rather than something I think might cause smoke.
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  #38  
Old 06-19-2017, 09:19 AM
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Have you pressure tested the system? Turbo, Intercooler and all? You have to make sure there are not any leaks? Sound like you may have a few possible things causing this.


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  #39  
Old 06-19-2017, 11:09 AM
cardiac cardiac is offline
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I've blown the intercooler boot off does that count as a test. lol
I will call the tuner about the map. I'm thinking I may have to try a 64mm turbo to obtain a smoke free drivable truck, except in WOP.
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  #40  
Old 06-19-2017, 12:27 PM
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Does it haze at idle? And cruise, as well? I can tell you a smaller turbo won't fix that. It takes about 12k rail pressure to make 200s smoke free at idle (I mean smoke free like a stock truck) with ovals. Josh is correct, it's gonna take quite a bit of fine tuning to make the ovals run clean.
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  #41  
Old 06-19-2017, 01:29 PM
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Quote:
Originally Posted by WolfLLY View Post
Does it haze at idle? And cruise, as well? I can tell you a smaller turbo won't fix that. It takes about 12k rail pressure to make 200s smoke free at idle (I mean smoke free like a stock truck) with ovals. Josh is correct, it's gonna take quite a bit of fine tuning to make the ovals run clean.
No joke. I gotta mess with mine some more. mines not terrible but when I jack the rail up it lopes due to the pilot injection being so big lol.
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  #42  
Old 06-19-2017, 02:18 PM
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Quote:
Originally Posted by catman3126 View Post
No joke. I gotta mess with mine some more. mines not terrible but when I jack the rail up it lopes due to the pilot injection being so big lol.
Ahh heck, just shut the pilot off in the idle areas
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  #43  
Old 06-19-2017, 03:23 PM
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Just throwing it out there but being this is a rebuild have you checked to make sure there was no rags left in the intake take somewhere maybe plunging up the inter cooler or something else.
Some may laugh but it deff wouldn't be the first time it has happened.
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  #44  
Old 06-19-2017, 04:39 PM
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Quote:
Originally Posted by monster50iii View Post
Ahh heck, just shut the pilot off in the idle areas

I've actually heard of that and thought about it. It seems like I heard dimitri's red crew cab like that one time. actually sounds good I think.
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  #45  
Old 06-19-2017, 05:13 PM
cardiac cardiac is offline
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It has 2 to3 lb of boost about 40 mph and it will pour smoke until 7 lb of boost is reached, than haze out to about 70. and I think it stops, I can't see if it's still hazing or not at that speed. I have had 3 tuners and it still smokes. Torque diesel has spent 6 hrs tuning and driving and still I got this. So I will go back to stock turbo and see if that fixes it if not I will sell the 60s and 68mm, if it still smokes. I will sell the 10mm pump also. It will stop smoking or the truck goes, before I will replace the fingers. Or I could just drop another 50000. and go truck pulling, in stock class of course.lol
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