header & downpipe = bad mpg

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12-31-2011, 04:17 PM

MyOtherSS

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header & downpipe = bad mpg

Like the title says I put a bad mab header and 3" Dp on and my mpgs dropped from 24-25 around town to 20. This is based on me clocking the mileage not the display. I don't know if I need a tune?

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12-31-2011, 04:25 PM

05Slowline

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cold weather

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12-31-2011, 04:36 PM

Ownedbyagirl?

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Need tune!

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12-31-2011, 04:39 PM

damastah

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tune it? maybe dumping too much fuel

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12-31-2011, 04:39 PM

05Slowline

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lol no you don't

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12-31-2011, 04:40 PM

TurboTechRacing

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Have you been more aggressive in your driving since the header? This would be my guess.

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12-31-2011, 04:41 PM

Chevycobaltss3

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For best results tune. But most of the time when winter comes around you will lose fuel (mpg) because **** gas and the gas is e10 blend. In most places on east coast

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12-31-2011, 05:08 PM

KoriCobalt

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Quote:

Originally Posted by Chevycobaltss3

For best results tune. But most of the time when winter comes around you will lose fuel (mpg) because **** gas and the gas is e10 blend. In most places on east coast

I agree with Chevycobaltss3 Tune it!! Had the same issue, especially in winter season.

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01-01-2012, 09:48 AM

MyOtherSS

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Quote:

Originally Posted by TurboTechRacing

Have you been more aggressive in your driving since the header? This would be my guess.

That was my thought too and I had a bit of a lead foot for the first tank so i babied it for the next two I took it easy just putting around.

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01-01-2012, 05:05 PM

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Ownedbyagirl?

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Quote:

Originally Posted by MyOtherSS

Like the title says I put a bad mab header and 3" Dp on and my mpgs dropped from 24-25 around town to 20. This is based on me clocking the mileage not the display. I don't know if I need a tune?

Try disconnecting your battery so it resets the computer. (aprox 10 Mins)
Then go for a drive on the highway for 1 hour on cruse control at 100KM or 60 MPH

Try that and come back and let us know how that went.

That's what my boyfriend says.

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