LML Danville 3794 Stg2

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Dart.340

Canadian
Aug 3, 2015
30
0
0
Near Ottawa
I went to order this turbo today and it's no longer available. Frack. Pain in the butt. Marc told me too many tuners were having issues on the lml and blaming his turbo.
I hope someone can figure a way to tune these things I'd live to have a 65 or 66 mm turbo
 
fallooffie

fallooffie

New member
Jul 25, 2016
25
0
1
Dart.340 said:
I went to order this turbo today and it's no longer available. Frack. Pain in the butt. Marc told me too many tuners were having issues on the lml and blaming his turbo.
I hope someone can figure a way to tune these things I'd live to have a 65 or 66 mm turbo
Click to expand...

May just be in your best interest to go with a fixed vane turbo if swapping the stocker, will lose turbo brake though, or go with compound setup over stock turbo.
 
MarkBroviak

MarkBroviak

DMax Junkie
Vendor/Sponsor
May 25, 2008
2,231
740
113
Danville Indiana
Dart.340 said:
I went to order this turbo today and it's no longer available. Frack. Pain in the butt. Marc told me too many tuners were having issues on the lml and blaming his turbo.
I hope someone can figure a way to tune these things I'd live to have a 65 or 66 mm turbo
Click to expand...

Sorry guys but yes it is true! I yanked the LML turbo stuff off the website for now until they can get the tuning crap figured out. You would think after 6+ years in the field that they would have this stuff figured out but unfortunately no. I have been building vgt turbos for 10 years now and it feels like I have to prove everyday the reason why my turbos hold all the VGT turbo records and it honestly is taking all of the fun out of it for me! The LML VGT tuning issue is a software issue plain and simple. I sooo sick and tired of getting phone calls from customers because their tuner said it is a turbo problem when it is clearly a control issue with the software. Unfortunately for me I am NOT a software engineer/computer programmer and I do NOT know how to read or use Hex-editing software. I am a mechanical guy, I am an ASE Mastertech for close to 20 years now with Advanced level certifications and specialized in engine electronics and driveability and engine performance. I completely understand the mechanical workings of everything involved in the Dmax better than most and it makes it that much more frustrating to not be able to do a damn thing about these issues. Now I will give Kory a ton of credit here because he is the only one to reach out to me to try and figure something out with this issue and he has spent a ton of time trying to find the missing tables to help with the issue. Unfortunately for him though he is on the other side of the fence from me, he is a software guy without the same mechanical background. I love the drive he has and the never give up attitude! I honestly hope that we can get it figured together it will be good for everyone involved. There is no reason to give up the vgt when they are the best of both worlds for guys with street trucks that want the driveability and turbo braking but also want the hp. We have trucks making well over 1200hp with vgt twins and triple turbo setups on fuel only so why would you want to give that up.

These pictures are the straw that broke the camel's back so to speak. This was one of my 3794 stg2 LML's that was ran with Moto-Ops tuning. Customer continually called me up trying to figure out why the truck wouldn't run and I gave him the same answer I give everyone when that ask me this question, the truth! Well they started getting it to go in the right direction and then it broke. Customer calls me up and lets me have it saying that he pissed cause it never ran right and I needed to take care of it because the online info says that it was a builder error/ balance issue/over torqued. I felt bad for him because of all the issues he had and offered him a smaller turbo that would be easier for his tuner to get right. You can clearly see by the pictures that it was a tuning issue from pinching the vanes too hard trying to make boost and they melted the inducer of the turbine wheel and put it out of balance causing the failure! Why should I eat someone else's mistake??? It would be different if I was one of these Joe blow's building turbos in my garage at home on the side but I'm not! I'm certified and have a long history of it without issue! I ship on average anywhere from 20-60vgt's a month! I see less that a 1% failure rate and I take a LOT of personal pride in that! I build every single turbo myself for a reason, I can't pass the buck to someone else! It's my baby plain and simple and it is the same with my tuning, I'm the only one at Danville that tunes for the same reason! Sorry for the rant guys but it just drives me nuts dealing with this stuff sometimes.

On a side note, I am currently working on a line of more LML specific turbos that should work with the stock vane tables so that you can have both without any issues. I will keep you guys posted on them as they are closer to release. Thanks for reading this long winded rant, sorry again.
 

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PureHybrid

PureHybrid

Isuzu Shakes IT
Feb 15, 2012
3,886
801
113
Central OH
I'd love to see the drive pressures on that tune!

You can't make everyone happy Mark, but it seems you had the right idea pulling the plug on them.
 
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Digmax

Member
Jan 23, 2016
289
2
18
Quick question, how much drive pressure does a lml with a 475 over stock( properly tuned 0% vain position at wot) run on a say 650 hp tune. sorry for derail but its been kinda scarin me and figured you where the man of knowledge on the subject

Sent from my C811 4G using Tapatalk
 
MarkBroviak

MarkBroviak

DMax Junkie
Vendor/Sponsor
May 25, 2008
2,231
740
113
Danville Indiana
Digmax said:
Quick question, how much drive pressure does a lml with a 475 over stock( properly tuned 0% vain position at wot) run on a say 650 hp tune. sorry for derail but its been kinda scarin me and figured you where the man of knowledge on the subject

Sent from my C811 4G using Tapatalk
Click to expand...

As long as it is 2:1 or less then it doesn't matter. By this I mean if you have 60psi boost then as long as it is less than 120psi drive then your good. Turbos live longer lives when they have a bit more drive than boost.
 
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Digmax

Member
Jan 23, 2016
289
2
18
Wow so I didn't realize drive was that high, amazing my stock head bolts are still doing the job, would drive go down if had a 366 instead of stocker?

Sent from my C811 4G using Tapatalk
 
MarkBroviak

MarkBroviak

DMax Junkie
Vendor/Sponsor
May 25, 2008
2,231
740
113
Danville Indiana
Digmax said:
Wow so I didn't realize drive was that high, amazing my stock head bolts are still doing the job, would drive go down if had a 366 instead of stocker?

Sent from my C811 4G using Tapatalk
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You would need to install a gauge to see how much drive you actually have. I'm just telling you where you don't want it to go over. Cylinder pressure is what matters when it comes to engine components living or failing. Your truck idles with 650-750psi in the cylinder and 0 drive pressure. At power your in the 2500-3000psi range on a big tune so even you had 120psi of drive the motor doesn't care. Drive is only an issue when the hp starts dropping as it increases, then you need to worry about it.
 
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Digmax

Member
Jan 23, 2016
289
2
18
Gotcha def learning here was thinking would get the gaskets quicker with high drive, kory has done my tuning and truck feels awesome as far as when im on it hard although at cruising speed is kinda laggy but not bad, doubt that is a drive issue though, seems like vanes are little to open at part throttle but not a big deal at all. Tow tune is a lot better

Sent from my C811 4G using Tapatalk
 
S

S Phinney

Active member
Aug 15, 2008
4,008
18
28
Quncy, Fl
Digmax said:
Gotcha def learning here was thinking would get the gaskets quicker with high drive, kory has done my tuning and truck feels awesome as far as when im on it hard although at cruising speed is kinda laggy but not bad, doubt that is a drive issue though, seems like vanes are little to open at part throttle but not a big deal at all. Tow tune is a lot better

Sent from my C811 4G using Tapatalk
Click to expand...



When vanes are open a little too much at a certain spot that is a drive pressure issue with it being low at that moment.


Sent from my iPhone using Tapatalk
 
D

Dart.340

Canadian
Aug 3, 2015
30
0
0
Near Ottawa
I hope mark can release these turbos again. I'll have one on order in a heart beat. I know there will always be tuning issues but there has to be a way to make them work.
 
MarkBroviak

MarkBroviak

DMax Junkie
Vendor/Sponsor
May 25, 2008
2,231
740
113
Danville Indiana
I am currently working on this project and will post it publicly when I can. Thanks for the support guys, I really appreciate it.:thumb:
 
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