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MPG's post full bolt ons / tune

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Old Aug 1, 2015, 11:18 PM
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MPG's post full bolt ons / tune

So I did the basic boltons, and got my car tuned by Kozmic in Houston. (2014 MR) Car runs great but OMG the MPG's when you drive it hard is insane. Like single digit insane.

Mods are:

Fuel pump
ETS Test pipe
ETS UICP
Cobb EBCS
New spark plugs
Drop in air filter - Cosworth

Is this 'normal' for modifying these cars? I gained MPG's on my STi when I modded it? lol

So if you put a bigger turbo on these cars do you just have to have an umbilical cord attached to a gas tanker that is following you around to get to work?

Inquiring minds want to know.
Old Aug 2, 2015, 05:03 AM
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why are you worried about MPG's? poeple who mod cars usually don't really care for MPG's, especially these cars. but on my 8, a tank i get roughly 250 miles to the gas light.
Old Aug 2, 2015, 07:03 AM
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I'm not worried about them per say, just surprised they dropped to such low levels after a simple mod / tune. I thought drops like that wouldn't happen unless bigger turbo
Old Aug 2, 2015, 07:06 AM
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more boost=more fuel. with a much spirited driving gas tank i see maybe 180-200 at gas light. 250 if i baby it haha. drive the old civic when i want to save gas. it gets around 370ish a tank.
Old Aug 2, 2015, 07:11 AM
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On my X I have full bolt-on's (minus licp) and am tuned at 25psi of boost. Car makes 330whp on a conservative 91 tune. On average I get between 240 and 250 miles out of a tank of gas. That's with city, highway, and spirited driving.
Old Aug 2, 2015, 07:12 AM
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And why did you upgrade the fuel pump?
Old Aug 2, 2015, 07:50 AM
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The tuner recommended / almost insisted on it because they were concerned it would run out of gas while tuning I would assume...
Old Aug 3, 2015, 05:00 AM
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I average 230 miles on a tank, I can get 250+ on long highway trips. I definitely can't complain about that, personally.
Old Aug 3, 2015, 10:20 AM
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Originally Posted by Napalm_Enema
So I did the basic boltons, and got my car tuned by Kozmic in Houston. (2014 MR) Car runs great but OMG the MPG's when you drive it hard is insane. Like single digit insane.

Mods are:

Fuel pump
ETS Test pipe
ETS UICP
Cobb EBCS
New spark plugs
Drop in air filter - Cosworth

Is this 'normal' for modifying these cars? I gained MPG's on my STi when I modded it? lol

So if you put a bigger turbo on these cars do you just have to have an umbilical cord attached to a gas tanker that is following you around to get to work?

Inquiring minds want to know.
lol not necessarily, it depends on the tune and mods. most importantly the tune.
Old Aug 3, 2015, 10:34 AM
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Current MPG reading is 9.1mpg

Since Thursday, with cruising and running errands, punching it here and there I have filled up:


5 times

5



yes, 5.

This is not crazy road trip journeys either, just driving around town and driving as I usually do, and even more reserved honestly.

Average MPG's before tune and parts - around 19mpg
Old Aug 3, 2015, 11:02 AM
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Wow I'm sure you need to be retuned. There is no way you should have to fill up 5 times in 4 days. I do find it a little odd that your tuner had you upgrade your pump with those bolt ons. There's just no need for it
Old Aug 3, 2015, 11:04 AM
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Originally Posted by AlexDRS94
Wow I'm sure you need to be retuned. There is no way you should have to fill up 5 times in 4 days. I do find it a little odd that your tuner had you upgrade your pump with those bolt ons. There's just no need for it
This was my thought exactly
Old Aug 3, 2015, 12:54 PM
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really surprising considering he says he was tuned at Kozmic as well ;/
Old Aug 3, 2015, 01:23 PM
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I too don't like money and enjoy throwing it away
Old Aug 18, 2015, 11:56 AM
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Got my car sorted, they adjusted some part of the tune where when puttering around it wasn't so aggressively dumping fuel thinking I was about to floor it.

Car drives great, and the MPG's are tolerable, around 16-17 I'm guesstimating but am working to calculate for sure.

Anything is better than the 8-11 I was getting!


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