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Wheres the Power?!?!

superman072000

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superman072000 Enthusiast

superman072000

Posted
Posted

I have a 2004 6.0L gas 2500HD. As such I have the worst gas mileage I have ever seen. I love the truck and the power that comes with it. But i am looking to upgrade a few things. First I have already ordered a cold air intake which should be here any day. Next i would like to configure the exhaust so that it is workign with the intake. My stock is 3" dual inlet and 3.5" outlet. The only muffler that i have found that has the same setup is the 50 series FM. Is there anything else? I also want the deep resonate sound of the FM. I was originally looking for the 40 series, but not offered in the dual 3"/3.5out. Also next on the list would be a throttle body spacer. Then cash flow permit i want to get a superchip flash pax. Any comments or recommendations for fuel economy/HP.

superman072000 Enthusiast

superman072000

Posted
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I HAD A 04 ss. 6.0. the pcm tune got me 1 or 2 mpg. had the flowmaster and k&n filter.

 

 

How do i figure out which exhaust will be the best. with dual inlets should i get two mufflers or stick with the one 50 series that has the setup up for a direct replacement muffler?

tmaj1865 Enthusiast

tmaj1865

Posted
Posted

I tried the duels on my 01 6.0 HD, It sounded horrible, like it was under water or something, then I swiched to a Gibson side swept duel 3" in single 4" out, alot better. I went with an Outlaw cold air and a Wait4me milage tune, I average about 13mpg with a 4x4 285 tires

dewfpo Senior Enthusiast

dewfpo

Posted
Posted
They work in parrallel to crank the DMax over (it takes a lot of 12V amps to spin a diesel on a 0F day). Normal for pickup truck diesels. If one battery goes bad, the good battery will get pulled down to the level of the bad battery.

 

DEWFPO

 

Forget the throttle body spacer and put the money into a custom tune.

 

DEWFPO

superman072000 Enthusiast

superman072000

Posted
  • Author
Posted
I tried the duels on my 01 6.0 HD, It sounded horrible, like it was under water or something, then I swiched to a Gibson side swept duel 3" in single 4" out, alot better. I went with an Outlaw cold air and a Wait4me milage tune, I average about 13mpg with a 4x4 285 tires

 

 

After all that you only get 13mpg. Bone stock my truck got 12.5 50/50 city/highway. So what your saying i am gonna spend about $500-$700 and get an extra .5mpg?

4ws f 7 Enthusiast

4ws f 7

Posted
Posted

I have been told that PCM's on HD's are detuned to run on 87 octane and to keep warr. claims down. My nelson PCM tune was the best money I have spent on my 05 1500 HD 6.0 to date. I am on my 4th exhuast! I wanted duell exhaust behind rear wheels at 45 degree angle. The issue for me has been noise level, what I want is a little louder than factory as the duell exhaust look was what I really wanted. The MBRP exhaust to me

seemed the best quality/look to me. But wow is it loud, so I switched to a Magaflow muffler which was only a little quieter, so now I took a 2500

HD muffler and cut hole in oulet of muffler to make it a real duell in and out muffler, this at least is ok on hyway noise, but is still noisey and has

a raspy noise at lower speeds. One good thing about the the MBRP and Magnflow mufflers it appears that over 4,500 rpm's there is a power feel

but this may just be the noise that is making it seem faster? :driving:

soccermom Enthusiast

soccermom

Posted
Posted

I just traded my 02 6.0 in a new LBZ Dmax but I suggest you get a tune first. I had a westers 87-89 dual tune and it really woke up the 6.0. I got minor MPG gains hwy but nothing city. I drive 25k/yr and averaged 11/14 with the 6.0.

 

I also added a Flo-pro muffler/dual pipe set-up, as listed below, which sounded great but added zero power and was starting to sound blown out with 25k on it.

 

IMO you can throw a lot of $ at the 6.0l but you'll never make it a hammer. Great reliability & will work hard for you but it's not enough muscle, at least in the truck I had.

Chris97K1500 Enthusiast

Chris97K1500

Posted
Posted

Custom PCM, only way to make an increase in power with money well spent in a gasser, you can add CAI/exhaust, but you won't notice much if anything, just the sound. You'll notice the PCM the moment you touch the gas!

HDdave Enthusiast

HDdave

Posted
Posted

I'm going through the same delima as you. I put a K&N CAI on, and I had a set of true duals put on, using two Goerlich Xlerator mufflers. My local muffler shop did it for $370, and OMG does it sound awesome! I would reccomend this setup for anyone looking to put an exhaust on a 6.0. It's not obnoxious, but you definetly hear it inside and outside of the truck. It gets loud when your crawling along at 1500 rpm's, then if your cruising at about 55- 60 on a flat road it is pretty quiet at 2 grand. Then anything from 2500 and up just freaking screams... I noticed quite an increase in power with this setup, it just gives the motor that deeeeeep throaty sound that everyone likes.. Heres the site for the mufflers. www.goerlichs.com

superman072000 Enthusiast

superman072000

Posted
  • Author
Posted
Custom PCM, only way to make an increase in power with money well spent in a gasser, you can add CAI/exhaust, but you won't notice much if anything, just the sound. You'll notice the PCM the moment you touch the gas!

 

 

Whats a PCM?

Jimmy J Enthusiast

Jimmy J

Posted
Posted
Custom PCM, only way to make an increase in power with money well spent in a gasser, you can add CAI/exhaust, but you won't notice much if anything, just the sound. You'll notice the PCM the moment you touch the gas!

 

 

Whats a PCM?

 

 

In a nutshell. It's what tells your vehicle how to run. An onboard computer chip that tells the vehicle what to do, when to do, and how long to do it!

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