Real world MPG

PP Stage 1 BW and I went from around 7.4 mpg to around 8.0 mpg when I put the new manifold and turbo on. My old oringinal manifold was leaking pretty bad too.

I have worked on it real hard and totally changed my driving habits.

Using www.mygauges.com helped alot too.

 

Wow, that's a good gain , how do you like that turbo, are you lacking any bottom end power compared to the factory turbo?

 

The spool up is slower at low rpms, but has alot more top end HP. It handles the heat alot better too. I recommend the boot on the turbo too.

 

379,PETERBILT, 04 accert, 550+hp on cruise,475 on foot-feed, 13 speed,3.55 rears 22.5 tall rubber running bridgestones, i run the speed limit max 70, 6.25 mpg 3 years running, But i pull a tank and usually @ gross 65% , i do not have of them fuel saving gadgets ,still have the factory mufflers but will change them this fall, I only idle to unload, apu for over nights

 

Check out Walker Megaflow Mufflers. $99 at most parts houses and has a 4 year full replacement warranty.

Medium & Heavy Duty Mufflers

• Mega-Flow® Mufflers •
• Spark Arrestors •
• Wye Connectors •
• Universal Types •
• Muffler Styles

Mega-Flow® Mufflers


Walker® Commercial Vehicle mufflers are made in the USA and provide an economical replacement for OE components

• All-aluminized 18-gauge steel
• Domed heads to shed moisture for increased life
• Bridge-constructed inlets and outlets for vibration resistance
• Internally-welded baffles to increase durability
• Smooth flow for better fuel economy

Walker® offers a complete line-up of commercial vehicle mufflers with dimensional and backpressure data by SKU. Reference your new Master Catalog for detailed information on each muffler.

Specifically designed for Class 7 and 8 vehicles, Mega-Flow® combines Walker® quality and engineering with cutting-edge technology to deliver unparalleled performance (based on published competitive data); as much as 30% backpressure reduction without sacrificing acoustics. That means increased fuel efficiency and driver comfort.

*Tests performed on a Peterbilt® Class 8 truck with a Caterpillar® C-12 engine. Measured on vehicles equipped with a Mega-Flow® Muffler and identical vehicles equipped with OE mufflers over a 6-month period for a total of 312,961 miles.


Key Features of the Mega-Flow® Muffler

1. Reduced backpressure without sacrificing acoustics! The Mega-Flow® muffler combines an open-style design with OCF roving to produce a muffler that improves fuel efficiency without impact on acoustics, two key needs of the fleet. Other mufflers currently available address one at the expense of the other.
2. Backed By the best guarantee in the industry! Only Mega-Flow® mufflers are backed by a Limited Lifetime Warranty plus an exclusive 90-day Safe & Sound Guarantee.
3. Remetallized seams provide corrosion resistance! The Mega-Flow® muffler has remetallized welds that provide greater corrosion resistance. This remetallization process is unique to Walker® and ensures that your muffler will last longer and look better.
4. The embossed shell distinguishes the Mega-Flow® muffler from others! The Mega-Flow® muffler looks as good as it performs. With its embossed logo on the body, you can tell you're getting something special, and so can everyone else.

Link to website: http://www.walkerheavyduty.com/products/MegaFlow.asp

 

Inter 9200, c-12 with fuel temp and desactived wastegate and walker noisebreaker muffler.Hauling oversize boats one way and empty the other way,yearly ifta report show 7 mpg.

 

06 Freightliner Columbia 590k miles, c15 acert msx, 10 sp, 435 hp, 3, 73 ratio, 22,5 tires, single muffler. Mpg 5.5- 5.75, no idling, limited at 65mph , otr close to 80 000 lbs. Not good mpg. I"m looking to do some tuning.

 

95 w9, 3406e stock was 475..did free flows, 550 hp cam,different turbo, 550hp program ecm, fuel temp and boost combo off ebay. Now 6.9 mpg pulling bullrack

 

'95 W.Star
3406E @500hp w/temp+boost wire, and free flowing mufflers
18 speed
4.11
11R24.5 Winter deep caps
Pulling tanker @ roughly 100K gross
Average field distance from farm about 5-7 miles
About 15% of the time spent stationary loading or unloading
2.7-2.9 mpg
Luckily we only spend 5-6 weeks out of the year on this job!

 

2004 WS 4900EX
C-15 MBN stock tune
3.55 rears
13spd
pulling 16k loaded, 12k empty
going 60mph I average 7.2mpg, but add in a head wind and this 18" bumper screws me bad, about 6.2 average then