K&N Filter Breaking in Still - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
All about MPG All about maximizing your Miles Per Gallon (MPG)

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post #1 of 19 (permalink) Old 07-10-2011, 07:23 PM Thread Starter
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K&N Filter Breaking in Still

I made a nice 450 mile round trip this past weekend and saw a little jump on my MPG from 36.7 to 37.5 so far according to the lying information center. I was told it takes up to 500 miles to get the new filter to break in properly. Stayed a consistant 69-72 MPH on the freeway.

What else could I do to my little balt to get it up higher? upgrade the exhaust manifold?

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #2 of 19 (permalink) Old 07-11-2011, 05:32 AM
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Header, Cat delete, CAI
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post #3 of 19 (permalink) Old 07-11-2011, 08:21 AM
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CAI will not increase gas mileage. Colder air = more dense = more fuel = less mileage.

Do a catback, LSJ header/downpipe and you'll be golden, I think. Lowering the vehicle will more than likely help as well.

1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
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post #4 of 19 (permalink) Old 07-11-2011, 10:41 AM Thread Starter
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Awesome mp81. I assumed a CAI wouldnt do anything, since it basically increases HP, but not MPG. A SRI would grab even more hot air, so it defeats the purpose, lol.

I know a catback system will increase it by 1/2 mpg, but its very helpful into hitting that 40mpg HWY and not at a constant 55MPH. Thats why I was thinking of that 2.4L header/downpipe combo with a GMPP Touring catback. That will do the trick, I hope...

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #5 of 19 (permalink) Old 07-11-2011, 10:47 AM
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The SRI will produce an increase in power, and probably no decrease in mileage.

Well, as long as it's an early 2.4L Header/Downpipe, when it was the same as the LSJ.

1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
2014 Chevrolet Cruze Diesel - 17" MSR 013s, Black Bowties, Black Tails, UR Rear Lower Bar
1981 Chevrolet Camaro Z28 - JVC Ribbon Tweeters, SEAS Mids, Pyle Woofers, Kenwood Tape Deck, Zapco Amp/Equilizer, Ceramic-Coated Longtubes, 2.5" Pypes Stainless Exhaust, Bilstein B6 Shocks, GW U/L Control Arms, Hotchkis Springs Sway Bars, DD HDX Cluster
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post #6 of 19 (permalink) Old 07-11-2011, 10:56 AM Thread Starter
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I always thought a SRI would not help on MPG. If you think about it, its exposed even more to engine heat, it does grab air from 360 degrees, but the air is hotter. Kinda like driving on a hot day and seeing your engine power not so good compared to a cold winter night, your vehicle runs like a champ from colder temps of air being drawn in for better combustion. Maybe im wrong.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #7 of 19 (permalink) Old 07-11-2011, 11:13 AM
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Hotter air = less fuel needed.

The hotter it is outside, and the hotter your car is running, the better your gas mileage will be. Less power, though. An SRI will provide a decent increase in power, though. Maybe 1 or 2 HP less than a full CAI, but 5 or 6 over stock. (all wheel numbers)

1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
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2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
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post #8 of 19 (permalink) Old 07-18-2011, 07:09 AM Thread Starter
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ahhh...but the colder outside is at night, the faster your car goes, isnt that funny?
Hot Air=better MPG
Cold Air=better HP

The K&N is finally broken in...refueled my car twice, did the calculations...


Drum rolls please...


I get average City=29.5MPG, HWY=38.2MPG

Not too shabby for a $50 product.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #9 of 19 (permalink) Old 07-18-2011, 07:15 AM
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Quote:
Originally Posted by 5t3alth View Post
ahhh...but the colder outside is at night, the faster your car goes, isnt that funny?
Hot Air=better MPG
Cold Air=better HP
Correct.

Dense air makes power. You notice it waay more when you're boosted.

1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
2014 Chevrolet Cruze Diesel - 17" MSR 013s, Black Bowties, Black Tails, UR Rear Lower Bar
1981 Chevrolet Camaro Z28 - JVC Ribbon Tweeters, SEAS Mids, Pyle Woofers, Kenwood Tape Deck, Zapco Amp/Equilizer, Ceramic-Coated Longtubes, 2.5" Pypes Stainless Exhaust, Bilstein B6 Shocks, GW U/L Control Arms, Hotchkis Springs Sway Bars, DD HDX Cluster
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post #10 of 19 (permalink) Old 07-18-2011, 09:23 AM
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I have been thinking about picking up a drop in. So, in your opinion is it worth the cost?

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