How is gas with the X-Pipe? ? ?

[BMWX54.4]

Sunday i put the Straight pipes inside and the first week i got kinda annoyed. It draws so much attention and It KILLS gas. I put $20 and it doesnt even give me a 1/2 of a tank. Before i know it that $20 is gone. How does the X-Pipe do???

[Wagner]

Originally Posted by BMWX54.4

Sunday i put the Straight pipes inside and the first week i got kinda annoyed. It draws so much attention and It KILLS gas. I put $20 and it doesnt even give me a 1/2 of a tank. Before i know it that $20 is gone. How does the X-Pipe do???

Not sure how exhaust pressure released kills gas mileage, might be your foot on the gas to hear it

Change of exhaust has nearly no effect on mpg, especially if you are making it MORE free flowing.

[rocky1536]

Originally Posted by Wagner

Not sure how exhaust pressure released kills gas mileage, might be your foot on the gas to hear it

Change of exhaust has nearly no effect on mpg, especially if you are making it MORE free flowing.

If the exhaust is less restrictive you could be creating a rich environment (assuming you aren't somehow also getting more air to the motor) which could throw off gas mileage. The computer does compensate to an extend, but I'm skeptical of it ability to match a removed resonator..

That being said, I'd be surprised if removing the resonator would create measurable more flow...

[mywidebody02]

no difference in mpg. just easier to have a heavy foot to hear the exhaust.

[BMWX54.4]

Originally Posted by mywidebody02

no difference in mpg. just easier to have a heavy foot to hear the exhaust.

I think thats what it is. Cause i've kinda hit the gas pedal alot this week. not gonna lie.

[Wagner]

Originally Posted by rocky1536

If the exhaust is less restrictive you could be creating a rich environment (assuming you aren't somehow also getting more air to the motor) which could throw off gas mileage. The computer does compensate to an extend, but I'm skeptical of it ability to match a removed resonator..

That being said, I'd be surprised if removing the resonator would create measurable more flow...

That was true before ECM's ran the system. You'd have to do a lot more than switch the exhaust pipes on a X5 to make it run rich. And if it did, there is another issue.

[m5james]

Originally Posted by rocky1536

If the exhaust is less restrictive you could be creating a rich environment (assuming you aren't somehow also getting more air to the motor) which could throw off gas mileage. The computer does compensate to an extend, but I'm skeptical of it ability to match a removed resonator..

That being said, I'd be surprised if removing the resonator would create measurable more flow...

The resonator internally has an x-pipe, so removing that x-pipe took away it's scaveging affect on the exhaust.

[N S]

Originally Posted by Wagner

might be your foot on the gas to hear it

.

[LightWerkz]

Yeah probably just more driving around.

[marcjac]

I had my x-pipe put on a week ago and have noticed zero difference in mpg. However, I will say I tend to "lean" on the gas pedal a bit more than before to hear the music coming from out back lol. Once the newness wears off, I'll be back to driving like an old guy :-)