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Old 02-12-2012, 11:03 AM   #1
tigerdongal
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Member#: 305772
Join Date: Jan 2012
Chapter/Region: TXIC
Location: San Antonio TX
Vehicle:
2012 WRX STi
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Default 2012 STi Eco with Stage 1

Hello there,
Has anyone seen any real changes in fuel eco since swapping to stage one? I'm curious to if there is much of a change. Currently I am averaging about 22-23 mph going to and from work. Mainly stop start stuff. I have seen 27 on a reasonable run without the stopping, more slowing.

In my old WRX 2004 wagon, I flashed it to stage one and it killed the ecu. Apparently back then the firmware code was bad or something. Thankfully the dealer didn't know it was a flash that caused it and swapped it out.

Also are knock issues common? Last thing I want is something going south on me after my experiences on my 04. It is very unpleasing going into a corner and the engine stalling! Soon after this happened to me, it happened to others I believe. I know it was fixed soon afterward by Cobb, and they are the only ones I trust with the ecu.

Any help is appreciated, and I did spend a few hours last night searching the net for info.

Thanks,
Duncan
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Old 02-12-2012, 12:13 PM   #2
thebigevilfoot
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2011 WRX 350/365- sold :(

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I don't have much experience with stage 1 cobb maps, I hear they're hardly as good as they can be, seeing as how they are "universal." I'm also not sure if they cause knock. But with my stage 1 and 2 tunes (torqued performance tune, which is basically an online tune with revision, good stuff) my mileage increased significantly when not pushing the car, but also decreased if I was boost happy, but if I was watching my rev's and foot, I swear I was getting 27-29 city!
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Old 02-12-2012, 06:49 PM   #3
tigerdongal
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Thanks for the info Mr. Foot. Any info on which website to look at? If I was looking at the right one, it was for a WRX flash, not an STi.

The knock issue seems to be a big one on Cobb, but there is normally a simple solution for it from what I can gather.

Also sounds like the STi comes from Japan significantly detuned, so I may need something.

Recommendations fellas?
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Old 02-13-2012, 12:41 PM   #4
Cobb Tuning
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Our mapping for the 08+ cars is very good (despite being an OTS map) and makes some great power. Knock shouldn't be an issue when using out OTS maps assuming the car is in good mechanical condition and you are using quality gas. But, if you ever have any concerns, you can always take a data log and we can take a look at it for you. Also, check out our Dyno Database to see power numbers from actual cars on our shops' dynos and the power they are making at different modification levels.

Ian
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Old 02-13-2012, 01:02 PM   #5
YourFearlessLeader
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I have been running Cobb Stage1 OTS map on MY11 for about 10 months. To be honest, gas mileage has not improved or gotten any worse. The real difference is how smooth the car drives, and the addition of smoother lower end torque. Car honestly should have came like this from the factory.
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Old 02-13-2012, 01:46 PM   #6
tigerdongal
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Thanks for the information Ian and fearless leader. All appreciated. I am still a little apprehensive after my problems with the 04 WRX Accessport issues, but that was a while ago.
I do like the idea of it running smoothly, it is nice now, but sounds like it is on the lower end of the power scale as to where is could be.

So mileage stays about the same? Glad to hear it did not get worse. I've read numerous times the high flow cat DP saves gas, but I am not going there, as I've got 4 years of warranty and won't give that up!

The service group at the dealership recommend Cobb though!
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Old 02-13-2012, 02:05 PM   #7
Cobb Tuning
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Quote:
Originally Posted by YourFearlessLeader View Post
I have been running Cobb Stage1 OTS map on MY11 for about 10 months. To be honest, gas mileage has not improved or gotten any worse. The real difference is how smooth the car drives, and the addition of smoother lower end torque. Car honestly should have came like this from the factory.
This is a pretty good summary of what one can expect for mileage with our Stage1/Stage2 OTS maps for 08+ STi/WRX. I'd love to tell you you'll gain 10mpg by using our Econ maps, but I'd be lying -- if there was a significant mileage improvement to be had, Subaru would have done it themselves Our Economy maps disable the boost control system (to save fuel even during heavy right-foot driving) and eliminate the terrible CL/OL transition and very-lean AFR's on the factory tune.

Cheers

Lance
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