Mpg

[BassMaster]

In one of my exhaust threads I mentioned that I was getting worse MPG's with the Flowmaster vs No Muffler. I have been tracking my fuel ups with Fuelly. Here's some of the results.. Sorry for the sloppiness.

Muffler Removed
January 1
15.3 MPG

January 6
Towed for roughly 200 miles.
14.7 MPG

January 9
16.2 MPG

January 15
Used Tow/Haul mode.
15.1 MPG

AirFilter Cleaned, Muffler Put Back On, PCM Reset
January 22
14.8 MPG

January 30
14.4 MPG

February 5
14.0 MPG

February 9
14.1 MPG

Muffler Removed Again, PCM Reset
February 12
14.5 MPG

February 21
15.2 MPG

March 3
15.6 MPG

Not too sure about yall but I see a trend.

[SmokedRam]

I would also like to see this documented on a truck without a CAT and muffler.

Looks like the Flomaster in your case, deleting the muffler is in your best intrest in terms of economy.

[BassMaster]

I plan on going to magnaflows highflow cats this summer. I go out of state a couple times a year and dont want a ticket. I'll be doing the highflow cats with dual 14" magnaflows, I believe.

[car_enthusiast63]

Yea I've been running with no muffler (had flowmaster 40) and been having an average increase in mpgs of about 0.4-0.6 mpgs, not much but I like the sound, I may go back to a glass pack, it cleans up the sound a bit and sounds real aggresive

[BassMaster]

I also had the Flowmaster 40, SI/DO.

[car_enthusiast63]

You know I had gone from a cherry bomb glasspack to the Flowmaster and was actually dissapointed with the sound of the flowmaster, but happy with the performance though, I have never owned a magnaflow, I've heard great things about them!!

[BassMaster]

The glasspack should be less restricting than the Blowmaster.. I might just do dynomax bullets.

[txbass06]

I'm thinking about running the bullets after I get a set of headers

[car_enthusiast63]

That is similar to a glasspack isnt it? but much better?

[BassMaster]

Bullet has no packing, the glasspack has fiberglass packing.

[car_enthusiast63]

Ooo ok got you

[BassMaster]

The bullet only reduces sound by about 2db's. It's not supposed to change the tone at all.

[03 Rammer]

I love my 20+ MPGs lol hehe

[BassMaster]

Got a NEW muffler, got it for $30 it's supposed to just be a knock off flowmaster 40. But I needed something cheap until I could get my duals ran.

After muffler was installed.
4/2/11 234.9 14.3 (Breaking in?)
4/5/11 210.7 16.6
4/9/11 227.8 16.5 << Spent the last 3 days in Daytona

I always fill up when I get to the half tank mark or near it if I can. Now that I am back in town, I am sure ill go back to the 14-15 range. My overhead was right at 19 while in Daytona.

Back when I first got the truck I was getting right at 230 miles to the first half tank and that's my goal again.

[02Steve1990]

I think I get about 12 or 13 city and 18 highway...fill up once a week with a half a tank for about 43 bucks

[SmokedRam]

I think I get about 12 or 13 city and 18 highway...fill up once a week with a half a tank for about 43 bucks

What size tank do you have? A half tank on my 2nd gen is 17 gallons and at the current fuel price it would cost me $63 to top off from half tank.