Added K&N CAI and Magnaflow CBE Q's

Jimc · 06-15-2013, 09:36 AM

Just added both to my 2012 6MT Roadster with sport package. No issues with CEL's from the get go and sounds great.

Question is, gas mileage has droped from 17.5 to 14.5. Sure, I have been putting my foot in it a bit. However, now even after stoping the tromping it is still showing a loss of 2 mpg.

Also, before the bolt on's, I could run in 5th. gear in the city at a steady 50 or so MPH and the car would run without feeling like it was lugging. To get the same feeling now I find that I run in 4th.

Just curious what others are experiencing.

Jim

FuTuRe is Z · 11-25-2013, 04:06 PM

Could it be possible that you lost torque down low from the mods? Perhaps, but more likely than not check your connections on the intake, ensure sensors are plugged in correctly and everything is tidy. I'd check the exhaust for leaks as well.

If all else fails a tune will rectify the issue and improve torque on the low end as well, which will increase your MPG by a few numbers.

06-15-2013, 09:36 AM	#1 (permalink)
Jimc Base Member Join Date: May 2013 Location: New Jersey Age: 74 Posts: 97 Drives: 12 Vert Tour BS M6 Rep Power: 11	Added K&N CAI and Magnaflow CBE Q's Just added both to my 2012 6MT Roadster with sport package. No issues with CEL's from the get go and sounds great. Question is, gas mileage has droped from 17.5 to 14.5. Sure, I have been putting my foot in it a bit. However, now even after stoping the tromping it is still showing a loss of 2 mpg. Also, before the bolt on's, I could run in 5th. gear in the city at a steady 50 or so MPH and the car would run without feeling like it was lugging. To get the same feeling now I find that I run in 4th. Just curious what others are experiencing. Jim

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11-25-2013, 04:06 PM	#2 (permalink)
FuTuRe is Z Enthusiast Member Join Date: Nov 2013 Location: CT Posts: 263 Drives: 2014 370z Rep Power: 11	Could it be possible that you lost torque down low from the mods? Perhaps, but more likely than not check your connections on the intake, ensure sensors are plugged in correctly and everything is tidy. I'd check the exhaust for leaks as well. If all else fails a tune will rectify the issue and improve torque on the low end as well, which will increase your MPG by a few numbers.