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Old 09-01-2014, 05:21 PM   #1
imprzMF14
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Default 2014 N/A Impreza sport performance

Hello.
Just wanted to post my upgrades. I have a 2014 Impreza sport limited and currently I'm up to 181 hp @ 6200 rpm over the stock 148hp. At 4200 rpm I'm around 151 hp. This was all done using a scan gauge 2 connected through the OBD port.
Non-ethanol gasoline can probably be most of the reason, as it is all I put in my car but other than that I have a drop in K&N box filter with the air intake restrictor piece taken out and a custom mangaflow axleback from rallisport racing.
I'm not sure how accurate my readings are but I definitely feel it accelerate quicker. My MPGs did take a little hit but if I am easy on the throttle I can keep it around 29/30mpg.


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Old 09-01-2014, 05:49 PM   #2
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Old 09-01-2014, 06:02 PM   #3
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37 hp after intake an exhaust? so no supercharger?
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Old 09-01-2014, 06:44 PM   #4
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Old 09-01-2014, 07:41 PM   #5
hemophilic
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Don't feed the troll.
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Old 09-01-2014, 08:11 PM   #6
imprzMF14
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No supercharger. I don't think it could handle any boost


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Old 09-02-2014, 11:22 AM   #7
maperformance
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Sure it can. In fact, there is already a supercharger coming out for the XV which uses the same FB20 engine as the Impreza. And they aren't too different from the FA20 in the FRS/BRZ, and those are taking over 500whp on stock blocks, even with it's higher compression.

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No supercharger. I don't think it could handle any boost


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Old 09-03-2014, 06:22 AM   #8
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Quote:
Originally Posted by imprzMF14 View Post
No supercharger. I don't think it could handle any boost


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Just think with a super charger you could reach 300 at the wheels. Its math.
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Old 09-03-2014, 07:12 AM   #9
imprzMF14
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I know these gains seem high but I have to assume this isn't at the wheels hp.


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Old 09-03-2014, 08:39 AM   #10
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Quote:
Originally Posted by imprzMF14 View Post
Hello.
Just wanted to post my upgrades. I have a 2014 Impreza sport limited and currently I'm up to 181 hp @ 6200 rpm over the stock 148hp. At 4200 rpm I'm around 151 hp. This was all done using a scan gauge 2 connected through the OBD port.
Non-ethanol gasoline can probably be most of the reason, as it is all I put in my car but other than that I have a drop in K&N box filter with the air intake restrictor piece taken out and a custom mangaflow axleback from rallisport racing.
I'm not sure how accurate my readings are but I definitely feel it accelerate quicker. My MPGs did take a little hit but if I am easy on the throttle I can keep it around 29/30mpg.


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FYI A scan gauge is a diagnostic tool.
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Old 09-03-2014, 08:53 AM   #11
imprzMF14
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I know but the xgauge feature can be set specifically to the CANSF code the impreza is running. With the proper code I have set it to more accurately read hp and engine load


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Old 09-03-2014, 05:01 PM   #12
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Stop feedin the ****in troll.
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Old 09-03-2014, 06:36 PM   #13
imprzMF14
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I re calibrated my scan gauge and after a few runs I got a steady 169hp @6200 rpm...which sounds more accurate than the outrageous 181...


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Old 09-03-2014, 07:33 PM   #14
hemophilic
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The aussies have dyno results of tuned stock FB20's and are getting ~15%. 148HP + 15% is 170HP so that makes a lot more sense.
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Old 09-03-2014, 07:39 PM   #15
hemophilic
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By the way, I tried removing my "restrictor" air intake duct and it did help make a nicer sound at part throttle but WOT sounded dopey.
Also, I use Torque app and a Bluetooth OBDII scanner and it showed my intake temps hitting above 140 deg F while idling at stop lights. I'm definitely putting the duct back in.
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Old 09-03-2014, 07:54 PM   #16
millertime359
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Quote:
Originally Posted by hemophilic View Post
The aussies have dyno results of tuned stock FB20's and are getting ~15%. 148HP + 15% is 170HP so that makes a lot more sense.
Still doesn't make sense as he never stated he had a tune. He is simply running an axle back with a K&N drop-in and "restrictor" duct removed.

All the other guys that did this only saw a couple of HP IIRC with exhaust and intake.
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