I know this may get moved to the electronics forum but I posted here because it seems to get more attention. I am looking into a H&S mini max with flo-pro 5" aluminized exhaust full delete and AFE downpipe and would like some feedback on mileage gains, sound, etc...

1. I want to get MPG numbers from those who have done this with before and after numbers.
2. Will flo-pro exhaust be ok and should I get 4" or 5"? I want a deep sound but also would like to hear the turbo spool. I've heard the 5" will have a deeper tone but I don't want to loose performance if it is to big.
3. Should I do the pyrometer which has to be drilled in the manifold or can I monitor effectivly from the truck gauges? I will not be running it on hot setting but maybe once or twice just to try it. I plan on running on mild setting or even stock ( I just want to increase MPG).
4. Do you have to purchase the downpipe to delete the cat? I don't have emissions testing in my state just visual for safety inspection which I can work around. I was under the truck today ( I am new to diesel) and was looking at the exhaust. I saw around a 12" what looks like a CAT on the exhaust around the oil pan area which I am guessing is actually the DPF and then a 3 foot or so muffler toward the rear. I have heard others say the cat is on the downpipe which has to be really small or I am blind because I couldn't see it. I have also heard someone say there is no muffler on these trucks but I thought for sure that 3-4 foot chunk of metal toward the rear had to be the muffler.

Please forgive me for some of these questions just trying to figure everything out as I am pretty rusty on these newer vehicles and diesel especially. Is the cat tucked up in the engine bay or is it at the bottom like on most gas vehicles where you can get to it? I havn't had any luck finding a picture of the stock exhaust to understand it.

I would wait for some real tuning to come out. There is none as yet. These trucks have a dead pedal at around 1800 or so rpm's and the so called tuners that claim they can read the GM tunes can do nothing about it. Hmmm.

Any idea when some other tuners are going to be available? EFI Live or PPE ever going to release anything?

I would wait for some real tuning to come out. There is none as yet. These trucks have a dead pedal at around 1800 or so rpm's and the so called tuners that claim they can read the GM tunes can do nothing about it. Hmmm.

X2!

Not so much of a tuner that wakes it up past 2500 RPMS.

EFILive cannot read the tune out of the ECM so without that they cannot support anything on the LML. EFILive only works if one can read their own tune. Not get a tune from anywhere else and just flash it in do to copyrights

Brian

Yeah I know that EFI hasn't got anything for the LML yet but just wondering if they are still trying to make any breakthroughs or if they completly give up on it.

I say they have at least put it on the back burner for a while. A real headache they got while trying from post over on their site. Might check them out over on EFILive website.

Brian

if you get a aluminized exhaust, paint it with stove pipe paint and it will last forever. Thats is what I did and I live in MI. trucks live no longer than 10 years up here

Thread moved to 5th gen electronics.

Heard PPE will be this month!

I would wait for some real tuning to come out. There is none as yet. These trucks have a dead pedal at around 1800 or so rpm's and the so called tuners that claim they can read the GM tunes can do nothing about it. Hmmm.

Dead pedal???? My truck spools up faster than the lbz or any other duramax. There is no dead pedal. There is a problem with the traction control / torque control management.... and h&s. is a damn good tuner!!! Runs great! I can beat any lbz with a ppe 300 tune! Smokes a lot and Get damn good fuel mileage!

Heard PPE will be this month!

Where'd ya hear that? That would be awesome if true. There have been a lot of claims about PPE coming out but nothing ever comes of it

Ppe originally told me nov so don't count on it!! It's all good let them take their times and get it right the first time

Heard PPE will be this month!

Strong first post. Source?


I'm skeptical, but if this is true and they come out with an emission delete, I'm so in.

Edit: see others posts, I'm dissapoint :(

Dead pedal???? My truck spools up faster than the lbz or any other duramax. There is no dead pedal. There is a problem with the traction control / torque control management.... and h&s. is a damn good tuner!!! Runs great! I can beat any lbz with a ppe 300 tune! Smokes a lot and Get damn good fuel mileage!

Thank you! It is great hearing feedback from someone that has actually driven the H&S race tuning. ;)

Thank you! It is great hearing feedback from someone that has actually driven the H&S race tuning. ;)

Your welcome! You guys are the only smart ones that make my lml a reall truck. keep up the good work!
**** all you haters!

Your welcome! You guys are the only smart ones that make my lml a reall truck. keep up the good work!
**** all you haters!

Have you got videos of your denali on you tube doing the 0-130 pull? If so it is definatly bad ass. I keep going on you tube watching the vids trying to push myself to go ahead and order the stuff and void the warranty.

What kind of before and after increases mileage wise are you seeing with the tuner and exhaust?

Thank you! It is great hearing feedback from someone that has actually driven the H&S race tuning. ;)

I don't have to, everyone tells me the same.

But, if I do purchase the race tuning delete option and I like it, I'll be sure to report the truth if the dead pedal is fixed or not. I'm not here to slam you, I'm here to tell the truth. After all I'm a LML owner running your tuning.


Your welcome! You guys are the only smart ones that make my lml a reall truck. keep up the good work!
**** all you haters!

The fact is, the LML has a dead pedal under 2K RPM's. Even guys with NO DPF report the same.

I'll say again.. I have a slightly tuned LMM (around 90HP) that will blow my doors off from a stand still. Own both, and that's a fact.

Where'd ya hear that? That would be awesome if true. There have been a lot of claims about PPE coming out but nothing ever comes of it

PPE Directly... I dont want to get my hopes up either but my LML would be nasty with PPE tuning

Thank you! It is great hearing feedback from someone that has actually driven the H&S race tuning. ;)

I have driven one of your race tunes. It still has a dead pedal below 2K so that tells me you are not reading the tune at all. You can't see it can you? I also call BS on 500hp.
Run your truck at the track and show it. You should be at 13.0.

I have driven one of your race tunes. It still has a dead pedal below 2K so that tells me you are not reading the tune at all. You can't see it can you? I also call BS on 500hp.
Run your truck at the track and show it. You should be at 13.0.

:exactly:, the EDC17 tune fairy is writing calibration files for H&S Performance and leaving them under my pillow at night... :D You have got us ALL Figured out.

:exactly:, the EDC17 tune fairy is writing calibration files for H&S Performance and leaving them under my pillow at night... :D You have got us ALL Figured out.

I will when you run your truck at the track. You scared? I would be too with the truck I drove.
Why don't you guys shut us all up and run the truck at the track? Let the fairy drive; should save weight and help times.:D

I will when you run your truck at the track. You scared? I would be too with the truck I drove.
Why don't you guys shut us all up and run the truck at the track? Let the fairy drive; should save weight and help times.:D

:eek: You are welcome to get track times from a multitude of other forum members. I know what the truck does at the track and on a dyno. The point here is that no matter what is offered up to you for proof, you strive to find a way to shoot it down. We have gone through this time and time again. H&S Performance is the leader for LML Duramax tuning, and for good reason. I am proud of what we have to offer and will stand behind our product! It does exactly as advertised and then some.

I have driven one of your race tunes. It still has a dead pedal below 2K so that tells me you are not reading the tune at all. You can't see it can you? I also call BS on 500hp.
Run your truck at the track and show it. You should be at 13.0.

I'm sure they are reading there tunes via a bench ECM with A EDC17 reader connected to the internal ECM dataport as that is how the europeans have been cracking this ECM for years now. The problem still lyes with the software to manipulate what is there, and with the lack of competition right now what incentive do they have to make good tunes all around? All they have to do is make a hunky dory tune and offer it. Since theres is the only one, obviously it is the one people will turn to.

I'm sure they are reading there tunes via a bench ECM with A EDC17 reader connected to the internal ECM dataport as that is how the europeans have been cracking this ECM for years now. The problem still lyes with the software to manipulate what is there, and with the lack of competition right now what incentive do they have to make good tunes all around? All they have to do is make a hunky dory tune and offer it. Since theres is the only one, obviously it is the one people will turn to.

Exactly what sucks, H&S doesn't seem to want to take any constructive criticism from there customers and keep refining there tuning and making it better. They only want to listen to the people that think there tuning is the end all be all tuning but prolly have never ran any other good tuning

Exactly what sucks, H&S doesn't seem to want to take any constructive criticism from there customers and keep refining there tuning and making it better. They only want to listen to the people that think there tuning is the end all be all tuning but prolly have never ran any other good tuning

Not true at all. We are a company known for listening to the customer's wants and desires and integrating them into the software systems if the demand and capabilities are there. We have spent thousands and thousands of hours on the track and on the dyno testing. In time, I am sure there will be more product developments, tuning is never "complete". But for right now, tuning is HIGHLY limited by the current hardware available. Software can scream at the CP4 pump all day long, commanding more fuel, but do you think the CP4 pump will listen? NO! Mechanical limitations cannot be overwritten with software, no matter how hard you try. :D

We have taken into account all the reviews from customers and strive daily to make a tune that can please as many as possible. We take the criticism and do everything we can to improve the product. We are proud to be leading the development for the LML/LGH owners. If you guys are not happy with us pushing the limits of the truck, I am entirely confused. Everything we do can be (and is) seen by all other tuning companies out there, and learned from. I welcome the day that the competition can improve upon our tuning (maybe at some point someone will obtain some factory software configuration files, HUGE for development), so that we may all learn together and create a better product for the end user.

Our doors are open, if any of you would like to schedule a quick meeting at H&S Performance to see LML tuning take place, please feel free to call!

I just copied and pasted this from the forth generation electronics section. Wondering what this will mean for H&S tuners and the LML.

Hp tuners removing dpf delete ability

--------------------------------------------------------------------------------

Just got confirmation today that HPT is removing the ability to turn the dpf on/off in their software. Below is the email:

"
Removed because of pressure from EPA

Thanks,
William Henn
HP Tuners LLC.
www.hptuners.com
"

They keep deleting my posts about it on the hp tuners forum, which is super-professional, lol, but here is another email I got from them:

"Correct, bottom line is we’d like to stay in business so we have removed it from our software and at this point don’t see it being put back in anytime soon.

Thanks,
William Henn
HP Tuners LLC.
www.hptuners.com

From: support@hptuners.com [mailto:bill@hptuners.com]
Sent: Tuesday, December 06, 2011 2:55 PM
Subject: RE: DPF on/off gone in newer betas

Correct, bottom line is we’d like to stay in business so we have removed it from our software and at this point don’t see it being put back in anytime soon.

Thanks,
William Henn
HP Tuners LLC.
www.hptuners.com

Sent: Tuesday, December 06, 2011 3:05 PM
To: 'support@hptuners.com'
Subject: RE: DPF on/off gone in newer betas

You’re saying that this feature is not going to be available in upcoming releases of your software?

That must be why my posts were deleted, I bet you don’t want that to get out.


Is H&S catching pressure from the EPA and what will happen if EPA requires H&S to remove DPF tuning from their software for those who already have the tuner and exhaust with DPF deletes? Will you have to reinstall the DPF if EPA cracks down on already existing systems or would it just be for new tuners being sold? I am in a tough spot because I really want the tuner and full delete exhaust but I don't want to have to put it back on in a year because the software can't support it (just speculating that possibilty).__________________
2011 Chevy Duramax LML CC Z71 4x4
Black with Tan Leather Int. LTZ
Line-X Bed Liner

I just copied and pasted this from the forth generation electronics section. Wondering what this will mean for H&S tuners and the LML.

Hp tuners removing dpf delete ability

--------------------------------------------------------------------------------

Just got confirmation today that HPT is removing the ability to turn the dpf on/off in their software. Below is the email:

"
Removed because of pressure from EPA

Thanks,
William Henn
HP Tuners LLC.
www.hptuners.com (http://www.hptuners.com)
"

They keep deleting my posts about it on the hp tuners forum, which is super-professional, lol, but here is another email I got from them:

"Correct, bottom line is we’d like to stay in business so we have removed it from our software and at this point don’t see it being put back in anytime soon.

Thanks,
William Henn
HP Tuners LLC.
www.hptuners.com (http://www.hptuners.com)

From: support@hptuners.com [mailto:bill@hptuners.com]
Sent: Tuesday, December 06, 2011 2:55 PM
Subject: RE: DPF on/off gone in newer betas

Correct, bottom line is we’d like to stay in business so we have removed it from our software and at this point don’t see it being put back in anytime soon.

Thanks,
William Henn
HP Tuners LLC.
www.hptuners.com (http://www.hptuners.com)

Sent: Tuesday, December 06, 2011 3:05 PM
To: 'support@hptuners.com'
Subject: RE: DPF on/off gone in newer betas

You’re saying that this feature is not going to be available in upcoming releases of your software?

That must be why my posts were deleted, I bet you don’t want that to get out.


Is H&S catching pressure from the EPA and what will happen if EPA requires H&S to remove DPF tuning from their software for those who already have the tuner and exhaust with DPF deletes? Will you have to reinstall the DPF if EPA cracks down on already existing systems or would it just be for new tuners being sold? I am in a tough spot because I really want the tuner and full delete exhaust but I don't want to have to put it back on in a year because the software can't support it (just speculating that possibilty).__________________
2011 Chevy Duramax LML CC Z71 4x4
Black with Tan Leather Int. LTZ
Line-X Bed Liner

At this point in time we have NOT been told by the EPA that we cannot supply emissions delete tuning as an off-road product. We will continue to provide support for these products until we are told to do otherwise. If that point in time does come, it will likely be a new production limitation only. I can't imagine the EPA would track each retail customer down and force them to re-install emissions equipment. I am not certain, but this is how I feel things would happen. I recommend that if your truck is registered for street use, do NOT remove emissions equipment. It is Illegal in EVERY part of the country, whether you have emissions testing or not. We cannot condone it, and will not support it. Thanks!

At this point in time we have NOT been told by the EPA that we cannot supply emissions delete tuning as an off-road product. We will continue to provide support for these products until we are told to do otherwise. If that point in time does come, it will likely be a new production limitation only. I can't imagine the EPA would track each retail customer down and force them to re-install emissions equipment. I am not certain, but this is how I feel things would happen. I recommend that if your truck is registered for street use, do NOT remove emissions equipment. It is Illegal in EVERY part of the country, whether you have emissions testing or not. We cannot condone it, and will not support it. Thanks!

I guess my biggest question is- IF i buy a tuner now and do the delete (for off road use) of course, what will happen when I update the tuner in the future if the EPA has indeed cracked down on the DPF software. Don't you produce new tunes every so often that would require the tuner to be updated and would that conflict with the DPF software?

I guess my biggest question is- IF i buy a tuner now and do the delete (for off road use) of course, what will happen when I update the tuner in the future if the EPA has indeed cracked down on the DPF software. Don't you produce new tunes every so often that would require the tuner to be updated and would that conflict with the DPF software?

We will not know until that bridge is crossed. If we are limited on providing race tuning to the customers, there will likely be no updates for tuning. So whatever tune you are at will be the final tuning release. This is not set in stone, and all depends on the turn of events yet to come.

Not true at all. We are a company known for listening to the customer's wants and desires and integrating them into the software systems if the demand and capabilities are there. We have spent thousands and thousands of hours on the track and on the dyno testing. In time, I am sure there will be more product developments, tuning is never "complete". But for right now, tuning is HIGHLY limited by the current hardware available. Software can scream at the CP4 pump all day long, commanding more fuel, but do you think the CP4 pump will listen? NO! Mechanical limitations cannot be overwritten with software, no matter how hard you try. :D

We have taken into account all the reviews from customers and strive daily to make a tune that can please as many as possible. We take the criticism and do everything we can to improve the product. We are proud to be leading the development for the LML/LGH owners. If you guys are not happy with us pushing the limits of the truck, I am entirely confused. Everything we do can be (and is) seen by all other tuning companies out there, and learned from. I welcome the day that the competition can improve upon our tuning (maybe at some point someone will obtain some factory software configuration files, HUGE for development), so that we may all learn together and create a better product for the end user.

Our doors are open, if any of you would like to schedule a quick meeting at H&S Performance to see LML tuning take place, please feel free to call!

Last time your excuse was the emissions equipment will not allow X amount of throttle for them to remain functional. What's the excuse now? The guys with NO DPF still report a dead pedal. Can you not find that table?

I'm not being a smart ass, I just want to know.

Not true at all. We are a company known for listening to the customer's wants and desires and integrating them into the software systems if the demand and capabilities are there. We have spent thousands and thousands of hours on the track and on the dyno testing. In time, I am sure there will be more product developments, tuning is never "complete". But for right now, tuning is HIGHLY limited by the current hardware available. Software can scream at the CP4 pump all day long, commanding more fuel, but do you think the CP4 pump will listen? NO! Mechanical limitations cannot be overwritten with software, no matter how hard you try. :D

We have taken into account all the reviews from customers and strive daily to make a tune that can please as many as possible. We take the criticism and do everything we can to improve the product. We are proud to be leading the development for the LML/LGH owners. If you guys are not happy with us pushing the limits of the truck, I am entirely confused. Everything we do can be (and is) seen by all other tuning companies out there, and learned from. I welcome the day that the competition can improve upon our tuning (maybe at some point someone will obtain some factory software configuration files, HUGE for development), so that we may all learn together and create a better product for the end user.

Our doors are open, if any of you would like to schedule a quick meeting at H&S Performance to see LML tuning take place, please feel free to call!

Don't take that post the wrong way, I am very gratefull you guys are pushing the envelope on the LML. I have already purchased your race tuning and Mini Max just waiting for the EGR deletes to come out and put it all on at once.

I just got the feeling by some of your post that you guys are more then satisfied with your tunes and don't plan to improve them. Everytime someone complains about the lack of power in the lower RPMs you more or less tell them there are plenty of happy customers out there

Thanks

Last time your excuse was the emissions equipment will not allow X amount of throttle for them to remain functional. What's the excuse now? The guys with NO DPF still report a dead pedal. Can you not find that table?

I'm not being a smart ass, I just want to know.

In all honesty I am baffled at what you guys are talking about with "dead pedal". I drive the LML personally a lot, and love the response and fueling characteristics.

Yes, with the emissions system present street legal tuning we are very limited with how fast the fueling can come on. The exhaust system will become plugged much too quickly if particulate matter is too high and will easily double your DEF usage. More responsive pedal in turn = more particulates. We try to build our tunes at a safe level for the equipment they are designed to be run with.

For emissions removed tuning we are limited as to what the CP4.2 pump can supply. If too much duration and throttle response is used down low in the RPM with the pump turning slowly, you WILL drain the rail quickly amongst other negative issues such as transmission damage, irregular shift patterns, smoke output, etc. Touchy throttle feedback creates a multitude of other issues. When I first started tuning, I love the "feel" of the over-sensitive fueling. But knowing what I know now, it is not always desirable. The trucks are tuned with what we know to be the best method to create the desired output we are going for. If the product does not do what you had desired, you are more than welcome to call our tech line and voice your opinion. I am referred to every tuning "complaint" and use that data when formulating the next tuning changes, hardware permitting.

Don't take that post the wrong way, I am very gratefull you guys are pushing the envelope on the LML. I have already purchased your race tuning and Mini Max just waiting for the EGR deletes to come out and put it all on at once.

I just got the feeling by some of your post that you guys are more then satisfied with your tunes and don't plan to improve them. Everytime someone complains about the lack of power in the lower RPMs you more or less tell them there are plenty of happy customers out there

Thanks

No hard feelings! It just gets a little old when customers and other vendors on here bash my product that I spend thousands of hours on. A product that most of those same guys said was "impossible" to even do. Not only is it the best on the market right now, NO ONE has even come close to doing what H&S had provided for the LML users. Yet for some reason we cannot make headway with you guys. We are here listening and interacting with you for the betterment of the product. You may not see the full scope of what we have to do on our end JUST to keep up with all the flash files that GM has released. But let me tell you it is nearly a full time job just to do that, much less keep up on multiple tuning files for each flash file. Not trying to give excuses, but the fact is that what we do is much more complex that most customers would ever dream. To be belittled by someone that may not have the slightest clue as to what we do or how we do it (not saying you, just the naysayers in general), really gets aggravating. :D

A product that most of those same guys said was "impossible" to even do.

...

Not only is it the best on the market right now, NO ONE has even come close to doing what H&S had provided for the LML users. Yet for some reason we cannot make headway with you guys.

Key points for all to pay attention to. When H&S first showed up here (and the first tuned LML pics, as rough as the tune was at the time, appeared) there was a long line of members right here at DP that claimed what they were doing was impossible...but when they were proven wrong they didn't exactly line up to apologize, much less eat crow.

H&S is being very upfront here and interacting with their customers (YOU guys) a lot more than any other LML company out there right now, so please give respect where respect is due.

You have been openly invited to come and test drive their equipment, so I don't think they're trying to hide anything....

I remember when PPE was getting beat up on this board when they first released their programmer for the LB7.

In all honesty I am baffled at what you guys are talking about with "dead pedal". I drive the LML personally a lot, and love the response and fueling characteristics.

Tell me this truck is anywhere comparable to a stock LMM with DPF equipment present, I want to hear it..

Yes, with the emissions system present street legal tuning we are very limited with how fast the fueling can come on. The exhaust system will become plugged much too quickly if particulate matter is too high and will easily double your DEF usage. More responsive pedal in turn = more particulates. We try to build our tunes at a safe level for the equipment they are designed to be run with.

For comparisons sake, you can't tell me the LML DPF system can't take the low end response that a LMM can. And I don't believe the CP4.2 can't fuel enough fuel at that low of a RPM. A LB7 has more pickup then this truck

For emissions removed tuning we are limited as to what the CP4.2 pump can supply. If too much duration and throttle response is used down low in the RPM with the pump turning slowly, you WILL drain the rail quickly amongst other negative issues such as transmission damage, irregular shift patterns, smoke output, etc. Touchy throttle feedback creates a multitude of other issues. When I first started tuning, I love the "feel" of the over-sensitive fueling. But knowing what I know now, it is not always desirable. The trucks are tuned with what we know to be the best method to create the desired output we are going for. If the product does not do what you had desired, you are more than welcome to call our tech line and voice your opinion. I am referred to every tuning "complaint" and use that data when formulating the next tuning changes, hardware permitting.

Answers in RED.

Same story different day...

Answers in RED.

Same story different day...

One thing to remember... this is NOT an LMM or a LBZ. You can compare all you want, but it means nothing. We are fighting the same issues on the 6.7L Powerstroke. Guys just keep wanting to compare it to the 6.4 capabilities. Apples and oranges. If you want to compare to something, you MUST compare to the competitions products currently on the market, otherwise you are wasting your time and mine.

Thanks!

Key points for all to pay attention to. When H&S first showed up here (and the first tuned LML pics, as rough as the tune was at the time, appeared) there was a long line of members right here at DP that claimed what they were doing was impossible...but when they were proven wrong they didn't exactly line up to apologize, much less eat crow.

H&S is being very upfront here and interacting with their customers (YOU guys) a lot more than any other LML company out there right now, so please give respect where respect is due.

You have been openly invited to come and test drive their equipment, so I don't think they're trying to hide anything....

Thank you for your understanding. We have found it very difficult to break into the Duramax market. We will continue to press forward, and as always our doors are always open for a visit.

Thanks!

I have driven one of your race tunes. It still has a dead pedal below 2K so that tells me you are not reading the tune at all. You can't see it can you? I also call BS on 500hp.
Run your truck at the track and show it. You should be at 13.0.

They are still deleting the emissions and getting rid of the codes that's a good start if you ask me motors only a year old


Sent from my Autoguide iPhone app

New to the site and not looking to offend anybody. I don't know much about these tuners but Bully Dog makes one for the LML. I have a '11 and absolutely love it. Has 5000mi on it and I honestly don't find any "dead spot" in the throttle but it is the first D max I've owned. Mine is completely stock.
Thanks, Dave

Slohand,

I also am new to the dmax group. Actually I am new to diesel, but I just installed the minimax on my lml and what a difference, I think it was all worth it.

Well, here is something to ponder.... I too have had and complained to HS about the "dead pedal" on the low end... I recently installed a lift pump and could not be happier with this fix to cure this problem. Now, I know some members may not want to spend the extra money and go this route because of the cost. However, in the end if future tuning is allowed by the EPA the mechanical limitations of what the factory pump can do will limit everything that HS does in the future for tuning.
For those that do not have a lift pump installed, please consider installing one to eliminate the dead pedal. I have not been happier.
As for HS, I appreciate everything they have done and will CONTINUE TO DO for the LML. However, I do strongly agree with other members on here that with no competition we will be limited on seeing any major improvements in tuning from HS (this is common business sense)
I do understand that HS has a full time job writing files for the LML with GM changes to software. But I will say that looking on HS site at the history log of updates for the LML, ford, and dodge I do not see any improvements in comparison. looking at the history logs should further prove that without tuner competition for the LML, we will be hard pressed to see anything refined come from HS.
lastly, at this point I'm more worried about what the EPA is going to do than HS refining any tuning. If the EPA says "no more" than in my view we have all just wasted a lot of money and our warranty for no reason.

Well, here is something to ponder.... I too have had and complained to HS about the "dead pedal" on the low end... I recently installed a lift pump and could not be happier with this fix to cure this problem. Now, I know some members may not want to spend the extra money and go this route because of the cost. However, in the end if future tuning is allowed by the EPA the mechanical limitations of what the factory pump can do will limit everything that HS does in the future for tuning.
For those that do not have a lift pump installed, please consider installing one to eliminate the dead pedal. I have not been happier.
As for HS, I appreciate everything they have done and will CONTINUE TO DO for the LML. However, I do strongly agree with other members on here that with no competition we will be limited on seeing any major improvements in tuning from HS (this is common business sense)
I do understand that HS has a full time job writing files for the LML with GM changes to software. But I will say that looking on HS site at the history log of updates for the LML, ford, and dodge I do not see any improvements in comparison. looking at the history logs should further prove that without tuner competition for the LML, we will be hard pressed to see anything refined come from HS.
lastly, at this point I'm more worried about what the EPA is going to do than HS refining any tuning. If the EPA says "no more" than in my view we have all just wasted a lot of money and our warranty for no reason.
I see you used the AD II. was it a pita to put on? I have been looking around and can't find one listed for the 2011. looks like the same one would work on the lml as the others though.

I saw where they will be coming out with an ad for the 2011 soon

I will be installing twin Kennedy pumps this week.

I see you used the AD II. was it a pita to put on? I have been looking around and can't find one listed for the 2011. looks like the same one would work on the lml as the others though.
Not really a PITA. The only real problem I had was mounting it to the bracket on the frame. The bracket has some curvature to it so that made it slightly challenging. The other problem I had was the splice into the fuel fill hose because the fuel fill hose is now a smaller size on the LML.
All in all its actually fairly easy to install.
I do know that they are in the final stages of having one specific for the LML very soon. After driving with it I do not ever want to be with out it. It makes the LML feel like a beast on steroids.
Some have said that its a little noisy. I can hear it but barely with the engine off. With the engine running you wont hear it at all.

Not really a PITA. The only real problem I had was mounting it to the bracket on the frame. The bracket has some curvature to it so that made it slightly challenging. The other problem I had was the splice into the fuel fill hose because the fuel fill hose is now a smaller size on the LML.
All in all its actually fairly easy to install.
I do know that they are in the final stages of having one specific for the LML very soon. After driving with it I do not ever want to be with out it. It makes the LML feel like a beast on steroids.
Some have said that its a little noisy. I can hear it but barely with the engine off. With the engine running you wont hear it at all.

Great info man. Thanks!!! I think i'm just gonna wait a minute till they get the new model out.:)

Mike I have been thinking bout also getting a kennedy pump please let me know what u think of it after the install! Are u goin with jus twins or also another filter?

Mike I have been thinking bout also getting a kennedy pump please let me know what u think of it after the install! Are u goin with jus twins or also another filter?

Only the twin pumps. I love these pumps and I ran them on my '04 LB7 pushing about 540 hp. I'll report my findings with some pictures of install.

Thanks will be waiting on the results!

What actual milege gains are you guys seeing? GF's '11 ex-cab short bed is only getting 15-16mph highway stock :(.

what actual milege gains are you guys seeing? Gf's '11 ex-cab short bed is only getting 15-16mph highway stock :(.

Nothing.. I'm still running the DPF though.

Thats not what I wanted to hear :(. Get rid of that crap and report back. Lol!! Buddy claimed 20mpg stock and some gains with the H&S but he said it would also have some tanks that were really bad too :confused:. He ran it for 20K and traded for his 6th 6.7 Cummins this year :rolleyes:.

Nothing.. I'm still running the DPF though.

Thats not what I wanted to hear :(. Get rid of that crap and report back. Lol!! Buddy claimed 20mpg stock and some gains with the H&S but he said it would also have some tanks that were really bad too :confused:. He ran it for 20K and traded for his 6th 6.7 Cummins this year :rolleyes:.

After buying 2 2011 6.7's I'd say he made a huge mistake. The Dodges got about 4 mpg's less than my lml and had WAY less towing power.

He's on his 6th one in a year. He's had 10-15 since they came out in 07.5 :eek:. He claims 20mpg on all the 6.7's with an H&S and the deletes on them :confused:. I'd love to see my gf get 18-20mpg cause 15mpg sucks.

After buying 2 2011 6.7's I'd say he made a huge mistake. The Dodges got about 4 mpg's less than my lml and had WAY less towing power.