2nd Gen Non-Engine/Transmission exhaust and MPG

[TMills]

I just cut out my muffler of the stock exhaust system and my MPG dropped about 2 MPG. Why would just cutting out the muffler drop the MPG that much?



Todd



I still have my resonator. Also, How would I increase the MPG to get back up to what I was?

 

[klenger]

It might be winter fuel.

 

[TMills]

So you would get worse fuel MPG with the winter than regular?

 

[jrandol]

klenger is probably right. Unfortunately its time for winter fuel again. :{ It has less BTU's per part so it takes more burn= less fuel economy. I can tell a difference this past week or so, truck is a little louder and down on power, not to mention I am burning a little more fuel. Seems like going back thru my records during the winter I average about 1-2 miles less per gallon.

 

[nascar]

I agree with winter fuel thoughts too. However, in my case after I did my 1st exhaust mod (ditching the muffler), I was also mashing the go pedal more to hear the new exhaust sound

 

[Mark Craig]

MPG

TMills,



If anything reducing exhaust back pressure will get you a small MPG improvement, what has happened to you is a situation that has been effected by some other situation like the guys ahve mentioned above.



Mark @ DPPI

 

[bmoeller]

I got a small improvement in mileage with the 5" (. 5mpg. ) and much better spool up. Only "problem" is that it doesn't smoke anymore because of it.