2500 HD Fuel economy 6.0L

[jaredszakacs]

send me a pm I got a great deal going on all gas and diesel truck products $1600 is way to much i can get you exhaust, stage 2 intake, and a programmer for $1200 shipped to your door and I can honestly guarantee a 5 mpg or better with it. your 6.0 is a thirsty motor no doubt about that!!! so save your hard earned money at the pumps with this setup a year and this system is paid off!!!! not trying to hijack a thread but my factory 2010 dmax as getting around 400-500 unloaded and around 400 loaded with the factory emmissions. I took it all off and now recieve over 800 unloaded and over 600 loaded gotta say you must get that factory restrictive crap off to get the prper mileage for your trucks

 

[Blownsilver]

Hey guys I work for Southgate GM in Edmonton if anyones interested we have both the 2010 in 6.0 L and new 2011s in diesels come in for a test drive and I will do my best to answer your questions. The new 2011 Denali HD are very nice rides and the new engine is amazing. Really good pricing on now for the 2010s onsite but no diesels left
Ryan Crozier

 

[jaredszakacs]

How do you like that new denali diesel??? I really really want one bad I bought my 2010 dmax and then found out about the denali edition looks like a great truck!!!

Hey guys I work for Southgate GM in Edmonton if anyones interested we have both the 2010 in 6.0 L and new 2011s in diesels come in for a test drive and I will do my best to answer your questions. The new 2011 Denali HD are very nice rides and the new engine is amazing. Really good pricing on now for the 2010s onsite but no diesels left
Ryan Crozier

 

[glengine]

Hey guys I work for Southgate GM in Edmonton if anyones interested we have both the 2010 in 6.0 L and new 2011s in diesels come in for a test drive and I will do my best to answer your questions. The new 2011 Denali HD are very nice rides and the new engine is amazing. Really good pricing on now for the 2010s onsite but no diesels left
Ryan Crozier

Thats the one that jamie hodgson is at right?

 

[slomo]

Thats the one that jamie hodgson is at right?

yep but come see me cousin glen:d

 

[glengine]

yep but come see me cousin glen:d

Yah. How's it goin cuz? Them 2011 denali hd's sure look sweet. And the fact that they are claimin 685miles per tank for milage totally stock from the duramax is crazy..

 

[maierch]

Yah. How's it goin cuz? Them 2011 denali hd's sure look sweet. And the fact that they are claimin 685miles per tank for milage totally stock from the duramax is crazy..

685 Miles wow that is good. That makes it work the $80k price tag!!

 

[Bullseye]

oh ya ,,it is much better on fuel ,and pulls better.The air intake was the biggest difference.I would like it a little quieter though..it is a little louder in the cab than i like but it is 4'' pipe as well,,

Have you heard about "afe dry filter" ????? I heard the oil for K&N's and ones like that can screw up the "mass air flow sensor" but some of these new aftermarket filters are dry and work even better ?? Anybody know ??

 

[Thunderr]

Copied from Diesel Place.com

Shortened due to character limit

Aftermarket Air Intakes/Filters - Do They Work? - Diesel Place

My goal here is to make sure guys know what they are getting into when they consider changing the intake of their DMax. At the bottom of this post I have include the only independent, scientific, extensive test of DMax air filters that I know of.

I want to emphasize that there has been a lot of dyno testing over the last few years to see if there are any HP gains with an intake for the DMax. The tests repeatedly show no significant—if any at all—increase in HP regardless of the intake system or filter used. Perhaps at power levels in excess of 500 RWHP—and most likely running a bigger turbo–there would be an HP increase.

What is controversial is whether or not turbo spool up time is improved with an aftermarket intake. The problem is there is no real way to test for that and seat-of-the-pants is not a reliable indicator. The aftermarket intakes do increase turbo noise, and some take that to be an increase in responsiveness. However we don’t know for sure. Also, if someone does the exhaust and intake at the same time, then there is no way to know which caused what “feels” to be an improvement.

Another controversial area is the claimed increase in fuel mileage an aftermarket intake supposedly provides. It is very hard to verify small improvements in mpg, especially over a couple tanks of fuel. Again, if someone does the exhaust and intake at the same time, then there is no way to know which caused the improvement.

I installed a K&N Aircharger (the 2002 version of the FIPK) on my 2002 the day after I got it. My mileage constantly improved with the truck for around 18,000 miles. Somewhere around that time I learned of the massive amount of dirt the K&N can let into a DMax so I went to an Amsoil air filter in a swiss-cheesed airbox. My mileage did not change, though the turbo was quieter. When I saw the results of Spicer’s test I changed back to a stock Delco paper air filter. My mileage did not change then either. This has been verified over many tanks of fuel calculated by hand.

Most aftermarket intakes do seal off under hood air. For a couple months I monitored my intake air temps and I found a direct correlation between EGT and outside air temps (OAT). The hotter the OAT the higher the EGT. I installed a TX Christopher Cold Air Intake kit, which is a rubber gasket that seals off the stock airbox, and it did keep the intake air cooler. So I think we can say an aftermarket intake will help lower EGTs by sealing off hot, under hood air.

WARNING—OPINION!! Given there is no HP increase and the MPG and turbo response improvements are questionable, I don’t think an aftermarket intake allows any more air into an engine equipped with a stock turbo. If it doesn’t allow any more air into the engine it is worthless.

What we do know—and what the test below shows—is that the aftermarket air filters do pass more dirt than the stock AC Delco filter.

The question you need to ask is: Is it worth risking more dirt into my engine for no HP gain and questionable gains in MPG and turbo response? That is a personal decision. Perhaps you do not drive in dusty conditions and for you ANY air filter would filter adequately. Regardless, don’t be mad when my Delco paper filtered DMax—running it’s “Kennedy Race Tune”—blows by you, your noisy turbo notwithstanding.....

Here is the air filter test Spicer reported on a couple years ago. This is basically a cut and paste of what is posted at: aluminum cylinder head used engine at duramax-diesel.com

NOTE: The pretty color graphs didn’t post—I’ll have to work on that later. However, the graphs are available at the link.

The Story behind the test:

First of all, many thanks to Arlen Spicer and Ken at Testand for organizing and facilitating the test. Arlen is a professional Firefighter who also operates a small tree service on the side. The tree service is the reason he owns a diesel truck. This study was the result of nearly a year of work by Arlen to get accurate independent data on air filters for the GM Duramax Diesel. Arlen originally set out to build his own Filter Test Stand so that he could perform accurate, repeatable and independent measurements on the various filters available for the Duramax. Arlen questioned the claims made by aftermarket filter manufacturers that their filters were superior to the conventional OEM style paper filters. After spending many months, hours and a considerable amount of his own money, he learned first hand how difficult it was to perform an accurate air filter test. He found it was difficult to maintain all the necessary controls to insure an accurate measurement. It was at this juncture that Arlen received a call from Ken at Testand offering to perform the ISO 5011 test free of charge. Ken found Arlen’s idea for an independent comparison study very interesting and offered to do the ISO 5011 testing using one of Testand’s industrial Filter Test Machines. Arlen posted the news in an internet forum and immediately the offers by forum members to purchase and send filters for the test started rolling in. Some members purchased and donated filters and others made contributions to cover the expenses and the cost of shipping the filters to Teststand. It was truly a team effort. The end result is the top quality data presented in this report. The following is a quote from a post in the forum.

(Arlen) SPICER wrote,
“Now that I am not doing the tests and my objectivity is not necessary, let me explain my motivation. The reason I started this crusade was that I was seeing people spend a lot of money on aftermarket filters based on the word of a salesperson or based on the misleading, incomplete or outright deceiving information printed on boxes and in sales literature. Gentlemen and Ladies, Marketing and the lure of profit is VERY POWERFUL! It is amazing how many people believe that better airflow = more power! Unless you have modifications out the wazoo, a more porous filter will just dirty your oil! Some will say " I have used aftermarket brand X for XXX # years with no problems. The PROBLEM is you spent a chunk of ching on a product that not only DID NOT increase your horsepower, but also let in a lot of dirt while doing it! Now how much is a lot? ANY MORE THAN NECESSARY is TOO MUCH!

Others are persuaded by the claims of aftermarket manufacturers that their filters filter dirt "better than any other filter on the market." Sounds very enticing. To small timers like you and me, spending $1500 to test a filter sounds like a lot. But if you were a filter manufacturer and you believed your filter could filter dirt better than any other media on the market, wouldn't you want to prove it? Guess what. Test your filter vs. the OE paper. It will cost you $3000 and for that price you will have the data that you can use in your advertisements. Your investment will be returned a thousand fold! EASIER than shooting fish in a barrel! So why don't these manufacturers do this? Hmmm? Probably not because they would feel guilty about taking more market share.

Now I am not saying that ALL aftermarket filters are useless. A paper filter does not do well if directly wetted or muddy. It may collapse. This is why many off-road filters are foam. It is a compromise between filtering efficiency and protection from a collapsed filter. Now how many of our trucks collapse their filters from mud and water? However, if a filter is using "better airflow" as their marketing tool, remember this....Does it flow better? At very high airflow volumes, probably. BUT, Our trucks CAN'T flow that much air unless super-modified, so what is the point? The stock filter will flow MORE THAN ENOUGH AIR to give you ALL THE HORSEPOWER the engine has to give. And this remains true until the filter is dirty enough to trip the air filter life indicator. At that point performance will decline somewhat. Replace the filter and get on with it.

Hopefully the results of this test will do 2 things. Shed some light on the misleading marketing claims of some aftermarket manufacturers and/or give us new insight on products already on the market that are superior to our OE filter. I stand for truth and will eat my words publicly if my statements prove wrong. I appreciate all of the help and support that you members have offered in this project. It would simply be impossible without your help. A huge thanks to Ken at Testand for his willingness to take on this project. I would be spinning my wheels from here to eternity without his help… SPICER”

Our thanks to Arlen and Ken for making the test happen and providing the valuable test results for the benefit of all.

 

[jasonrev]

On my 6l I get about 14-14.5L per 100km. The miles to gallon thing is a little tricky because if you guy by imperial gallons your milage looks a lot better. I can't really complain because I am running 285 pro comp x-terrian tires and wide rims. I also have a superchip which helped with power and milage. The truck still suck for milage around town, but I guess that is to be expected.

 

[motrhed]

If i was you what i'd do is put a hyperterch programmer in it and a cold air intake and an exhaust on it and you' be amazed at what you get for milage. A very good freind of mine has the same truck and what i listed is what he did to it and he gets 1000+km/tank of fuel. And it dont matter if he's empty or loaded.

I had an '04 2500HD 6.0L for just over 5 years and it worked fairly well for hauling and towing after some mods were added. Power wise, it had a Hypertech programmer, an Air-Raid cold air intake, and two different cat-back exhausts (1st: a Gibson piece of noisy $hit, 2nd: an awesome Banks Monster system - well worth the money and much better performance compared to the droning Gibson). I had 3:73 gearing, a 128L tank, and empty the truck would average 16MPG highway @ 120KPH.
I have to call BS to your friend's claim of 1000+km per tank, unless he had an oversized Titan tank stuffed under there!! Even my '07 D-Max Classic doesn't get anywhere near that per tank (128L)!!

 

[RUDY]

i have the 04 6.6dmax and it's average is 13.4/100km,filled the truck up last week took 75 liters, and i drove 540kms,showed i was good for another 120kms to empty so guessing i have 85-90 liter tank,worked out to be 20mpg.No mods done to the truck has a 4" exhaust that's it.

 

[maierch]

i have the 04 6.6dmax and it's average is 13.4/100km,filled the truck up last week took 75 liters, and i drove 540kms,showed i was good for another 120kms to empty so guessing i have 85-90 liter tank,worked out to be 20mpg.No mods done to the truck has a 4" exhaust that's it.

Most Regular box Chevy's and GMC's have a 99 liter tank. I'm not sure what long box trucks have in them but I'm sure it's around 130l.

If you drove 540km on 74 Liters your fuel mileage was 16.9 US MPG or 20.3 Imperial MPG depending on which unit of measure you use. I believe the standard is US. 13.4l / 100km converts to 17.5 US MPG.

 

[glengine]

I had an '04 2500HD 6.0L for just over 5 years and it worked fairly well for hauling and towing after some mods were added. Power wise, it had a Hypertech programmer, an Air-Raid cold air intake, and two different cat-back exhausts (1st: a Gibson piece of noisy $hit, 2nd: an awesome Banks Monster system - well worth the money and much better performance compared to the droning Gibson). I had 3:73 gearing, a 128L tank, and empty the truck would average 16MPG highway @ 120KPH.
I have to call BS to your friend's claim of 1000+km per tank, unless he had an oversized Titan tank stuffed under there!! Even my '07 D-Max Classic doesn't get anywhere near that per tank (128L)!!

I have gone on road trips with him and done 800km and there was no fillin up and it had the stock 130l tank. If you were only gettin 16mpg with yours that sucks cause it's the same as my 6.0l gas with a hypertech programer, k&n cold air intake, and straight exhaust

 

[maierch]

Copied from Diesel Place.com

Shortened due to character limit

Aftermarket Air Intakes/Filters - Do They Work? - Diesel Place

WARNING—OPINION!! Given there is no HP increase and the MPG and turbo response improvements are questionable, I don’t think an aftermarket intake allows any more air into an engine equipped with a stock turbo. If it doesn’t allow any more air into the engine it is worthless.
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What we do know—and what the test below shows—is that the aftermarket air filters do pass more dirt than the stock AC Delco filter.
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The question you need to ask is: Is it worth risking more dirt into my engine for no HP gain and questionable gains in MPG and turbo response? That is a personal decision. Perhaps you do not drive in dusty conditions and for you ANY air filter would filter adequately. Regardless, don’t be mad when my Delco paper filtered DMax—running it’s “Kennedy Race Tune”—blows by you, your noisy turbo notwithstanding.....

As far as I'm reading this test never concluded that the any intake kit makes more or less horsepower, lowers or raises fuel mileage or anything of the sort.

All it concludes is that most after market intakes allow more dirt to pass through the filter, which actually isn't that much if you look at the scale on the pretty colored charts. The AFE tested to be 99.23% efficient vs. the benchmark of the AC Delco 99.93%. The difference in the entire field tested was 3.63%, which really isn't much. My take away from this information is that if you're making a change to one of these after market products you have to pay more attention to them to ensure they're doing their job. The same can be said for all aftermarket modification done on anything: sled, quad, truck, etc.

It also does state that the AC Delco restricts flow almost three times as much at 350 cfm as the K & N filter (1 inch of Water vs 3 inches for the AC Delco). The curves on the pretty charts are also separating exponentially at the point where the chart ends between 300 and 400 cfm. I wonder what CFM a Dmax is pulling in when it's fully spooled up and close to redline?

All the actual report concludes is that the higher the flow the air filter, the higher the risk of passing dirt into the engine. The rest of it is based on an OPINION that the Dmax can't benefit from having a less restrictive intake.
What I would be interested in seeing is dyno tests of the various intakes compared to stock by an independent party. Does anyone know if this has been done? I also can't see how K&N can publish the power curves below and AFE can claim an 8HP gain over stock if that wasn't the case. I'm sure it all has it's marketing spin put on it but there must be some basis of truth. Maybe I'm just all to happy to hear what I want!

 

[Big Jon]

I'm not sure what long box trucks have in them but I'm sure it's around 130l.

My 03 2500HD long box has 136L gas tank. Empty running I can break 800kms easy running a 5 spd standard with 411 rear end making my 6.0 is spin 2500rpm at 120kph. A 373 rear should be better on gas for sure, but the engine is in a happy place on the highway with a camper and trailer and doesn't see that much empty use.

 

[knizer8hun]

Is there a company out there that can remap these 6.0l engines ?
Mine is an '08 which has averaged 18.8l / 100 since new. It has not improved despite adding a programmer, intake and exhaust.

 

[give_it_all_]

We have an 03 6.0 and I get about 12-13L/100km going to the cottage with one atv. Around town it's about 19l/100km and towing a 33 foot camper is 20-25l/100km.

 

[jaredszakacs]

wow you sure no your air intake systems! NOT!!! There is no way in hell that the factory air intake or filter can ever keep the dirt out like the most of the aftermarket kits! Example afe proguard 7 wich is a 7 layer filter wich by the way is 3 more layers of filter protection than a factory filter keeps out 2 as much dirt than the factory Intake system does. you can even add even more protection by adding one of the prefilter covers over the filter wich will let no dirt through the filter! Also with your theory of under hood heat it is crap as well! most intake well sorry the good not crappy ones will have either a fully enclosed box around the filter (Volant,S&B) while other like afe have a 3/4 box that opens up only to the fender were the factory intake sucks from and the afe one also sucks from behind the headlight wich gets all the cool air that comes up through your lower airdam! No for the mileage and power parts it's a proven fact that after market intake systems and exhaust systems add power and mileage it is a known fact that the auto manufactureers put major restrictions on the intake and exhaust side of the things to help with emmissions!! a factory duramax in an 06 year before all the emmisions could easily see a gain of 20+ HP FROM INTAKE AND EXHAUST COMBO with improving your fuel mileage by atleatst 1-3 mpg better! my dmax 2010 usd to get a whopping 450-480 km's on a tank of diesel with the factory crap on! I then took the intake and exhaust off and put a high horsepower programmer in and wow amazingly I'm getting 750-850 km's on a tank of fuel and gobs and gobs more power even when I turn my tune down to an optimized stock whopping 10 horsepower over stock! as far as intakes making difference with no exhaust sytems then the answer is yes they still make power and mileage again I have had chevs,dodges,nissans all have had an intake or exhaust swaps done. My titan had just a air intake system in it and got another 2 mpg better than factory with a volant intake not to mention improved throttle and deeper tone! to gain mileage out of a truck u need to take the stock restrictive stuff off and make the thing breathe!!!! here is a great example stock titan is like running a mile with a rope tied around your neck put an air intake and exhaust on it and it is like running a mile with no rope and a fresh air supply the whole time! everyone knows that the trucks now have so much crap on them to keep emssions down that they are choked up causing terrible mileage and lack of power do yourself a favor put an intake and exhaust on and watch your fuel mileage go up and up!!! obviously if you add a bigger turbo you will see more power like come on buddy that is a stupid no brainer but you gotta be able to get that air into the turbo and back out again try making big power with a new turbo and stock exhaust and intake and yeah you dont need 500 rwhp to see a difference you just need to hit the gas and see the difference!!!! so your telling me that my stock turbo kicking in at 2200 rpm with factory intake compared to my turbo now kicking in at 1750-1800 isnt an improvement in turbo spool up wow ok! I would like to see your truck even come close to my dmax with it's aftermarket afe intake and magnaflow 5'' exhaust w/duramaxtuner.com race tunes any time you wanna test this theory we can!!

 

[jaredszakacs]

forgot to add this here is a way to not get dirt in the filter CLEAN IT!!!! wow easy solution buy 2 filters keep one on the truck and one clean at all times so you can swap and there goes the whole dirt in intake theory