LML Hi-Flow or Hi-Capacity DPF? [Archive] - Duramax Diesels Forum


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01-31-2013, 05:55 PM
Since this is supposed to be a Duramax performance board, what are your opinions on where the aftermarket goes from here now that the EPA has come down against deleting the DPFs/urea on the LMLs?
What would it take to create a DPF that would flow enough or hold enough soot for a hopped-up Dmax, and is any company starting in that direction (other than ATS)? Even though tuners are able to create clean tunes for the LML, what else would have to be done so regen frequency could be kept controlable and reasonable?

Opinions? Thoughts? Ideas?

01-31-2013, 06:02 PM
Is flow really restricted all that much?

01-31-2013, 06:08 PM
I think the problem is more the amount of soot clogging the DPF too quickly, isnt it? So maybe "high-flow" wasnt really what I should say, maybe more like "High capacity"?
Modded the post and title to reflect that.

Texas Chevy
01-31-2013, 06:13 PM
High capacity would mean bigger and heavier in my mind.

01-31-2013, 06:13 PM
Meth for everyone

01-31-2013, 06:13 PM
If you create one, you'd probably make a good sum of money.

01-31-2013, 06:41 PM
I would think you should look at some semi DPF systems. I think DEF would be the way to go

01-31-2013, 06:53 PM
Is flow really restricted all that much?

you ever pulled one and looked in there lol? :D you cant see a spot light threw that thing and it slows compressed air down i tried to pur threw it

01-31-2013, 06:56 PM
All the Tier4 Cat DPF's on machines are the size of 55 gallon trash cans... I vote high capacity.

Texas Chevy
01-31-2013, 06:57 PM
you ever pulled one and looked in there lol? :D you cant see a spot light threw that thing and it slows compressed air down i tried to pur threw it

Lol no joke after reading that I went into the garage and looked. And you can't see crap and almost need a back brace to pick it up

01-31-2013, 07:19 PM
You could do it the old fashion way and put a whole right down the middle that would help with flow haha

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workin' diesel
01-31-2013, 07:24 PM
I love the look of the new trucks and all, but with all that emissions stuff, I will keep the old LB7 running until the body disintigrates and even then I might still keep it.

01-31-2013, 07:48 PM
the def trucks still have the dpf there even bigger then the ones on the lmm trucks

Texas Chevy
01-31-2013, 07:52 PM
All in all it was a couple hundred pounds of exhaust parts to take off

01-31-2013, 07:53 PM
There is a company we get allot of medium duty truck parts for that cuts them open and cleans rebuilds them, They have allot of different models. I think allot of over the road trucks have really big dpf's. I would think just get one of them, tap in the differential pressure sensors and strap it as close to downpipe as possible so it burns out good.

It would be really nice if someone made one that is easily serviceable.
Like a couple clamps, we pull out a recyclable filter, press a button in cab to tell ecm to check backpressure, it passes regen light goes out, we send filter off or have a place to wash it out etc, and we don't waste diesel cleaning it.

01-31-2013, 08:24 PM
I think the part that is going to hurt is the cost of a bigger or aftermarket dpfs is the material cost. If scrappers are giving 250-500 for dpf imagine how much they cost to make.

01-31-2013, 11:24 PM
Meth for everyone
at least water instead of cow piss hell bo!!

01-31-2013, 11:31 PM
lml has other issues, like very little fuel over 450
I had some lml charger issues as well I like the titanium aluminum turbines they spool great, put an lml on an lly and I just had to order new bering from a really nice guy today because it was way oversped and blew thrust bearings out in like 12000 miles.
I also saw the guy rev it up to like 9 lbs and immediately shut truck off so that didn't help

my point is lml turbine housing is super tight, so high flow exhaust may not be enough
its like gm designed this thing as a whole system

fyi the lly had one hell of a badass turbo brake at 100%vane zero throttle it would literally put you through the windshield