what car is this for? WRX FA20 or STI EJ?

I had MAP Stage 1 93 octane on my 17 WRX with cobb catback only. Huge difference and zero problems at all. very little if any knock and solid DAM. Cured rev hang, cured hill brake assist, cured the fall on its face at 4000rpms, cured overboost at low throttle etc etc.

I have a Map stage 1 93 octane for my 18 STI. I noticed I have a varying fine knock learn between -2.3 to -.5.2 ONLY when 3 conditions come together : between 20-30% throttle + between approx 3800-4500 rpms ONLY and in 2nd, 3rd, 4th gear. Its usually -2 to -3+ but Ive seen a few -4s and two or 3x a -5.3 or so.

Zero in any other RPMs at that throttle position range
Zero at that RPM band and any other throttle position.
Zero at WOT anywhere..

ONLY between 3800-4500 and only at moderate throttle. I can replicate it easily, and I can drive around it. Under heavier load like uphill it seems easier to make happen.
DAM is SOLID at 1.0. It never ever moves.

Ive seen similar FKL with the OEM tune in colder weather before I used the MAP tune SO I wonder if its just a characteristic or a problem with gas or the tune.
Ive emailed Ian at Map to ask.
Looking for a place to go turbo back and protune now.

I dont know which version of the MAP tune I have. If I remember I'll check and report back.
Havent gone back to stock yet as Im out of town until late friday

 

what car is this for? WRX FA20 or STI EJ?

I had MAP Stage 1 93 octane on my 17 WRX with cobb catback only. Huge difference and zero problems at all. very little if any knock and solid DAM. Cured rev hang, cured hill brake assist, cured the fall on its face at 4000rpms, cured overboost at low throttle etc etc.

I have a Map stage 1 93 octane for my 18 STI. I noticed I have a varying fine knock learn between -2.3 to -.5.2 ONLY when 3 conditions come together : between 20-30% throttle + between approx 3800-4500 rpms ONLY and in 2nd, 3rd, 4th gear. Its usually -2 to -3+ but Ive seen a few -4s and two or 3x a -5.3 or so.

Zero in any other RPMs at that throttle position range
Zero at that RPM band and any other throttle position.
Zero at WOT anywhere..

ONLY between 3800-3500 and only at moderate throttle. I can replicate it easily, and I can drive around it. Under heavier load like uphill it seems easier to make happen.
DAM is SOLID at 1.0. It never ever moves.

Ive seen similar FKL with the OEM tune in colder weather before I used the MAP tune SO I wonder if its just a characteristic or a problem with gas or the tune.
Ive emailed Ian at Map to ask.
Looking for a place to go turbo back and protune now.

I dont know which version of the MAP tune I have. If I remember I'll check and report back.
Havent gone back to stock yet as Im out of town until late friday

Thanks for the feedback!

I see you're out of Reading PA. If you're willing to make a trip, one of my friends have gotten tuned by Precision Tuning in Spotswood. Also Procom Racing in Toms River. Nothing but good reviews. I'm up in Hamilton/Princeton NJ btw.

 

Wow whoops.

2018 WRX premium, CBE,

 

Vlad,

I'm running MAP Stage 1 93 (also have 91) map. I've done periodic wot (40mph-60mph) pulls and my DAM is consistently 1, my feedback knock is consistently 0, and fine knock learn is consistently 0. While there are certainly other important numbers than just these, these are the three things I was told are particularly important to watch. The AFR from the most recent pull I did (about two weeks ago) fluctuates, but @ 100% is 11.x. There is a very short period where the AFR jumps to 22 @ 0% acceleration, immediately following the pull. No typical lean or rich symptoms.

I'm not claiming to be an expert at tuning cars. I'm not. However, the car runs great, the rev hang is history, the throttle response is now linear, and the car doesn't drop power after 5k. There is no audible knock under load or on deceleration. However, I use top tier 93 gasoline. Be careful. Crappy gas will likely cause you issues. If you only have access to crappy gas, run the 91 map. And, if you do have knock or sluggish acceleration, or any other lean/rich symptoms, you really should see a pro tuner.

All said, though, face it - it's a risk and your warranty will likely no longer be honored if you have problems. IMHO, it's worth the risk.

 

Thanks Chris for the feedback. What is target boost set at? No overboost? Also AFR at 11 sounds good at WOT. Sounds like a clean tune. I think I'm going to buy the AP through MAP. If I have any issues I can always run stage 1 COBB OTS. I'm in Jersey, so 93 for me will be Exxon, or Sunoco. It never sees anything less than 93.

Once I get it, ill post some logs to confirm.

Thanks again guys!

 

The RA is a different beast. Upgraded ECU, modified intake system, upgraded pistons, better exhaust. Although the HP and torque difference is minimal with the 18 versus RA, I believe these parts are attributing to better numbers.

With full TBE, you should easily be adding 20+whp.

The only gripe that I've read about Brentuning, is that customer service lacks, because they're so f'in busy. Other than that, his tunes are known to be aggressive. Some of the numbers in the thread I linked, for the WRX 15+ are extremely impressive. I couldn't imagine the STI being any different.

I would also definitely check out Precision. Check the website.

 

So I bought the MAPerformance AP, and should be coming this week.

Before logging, anything in particular I should do? Some suggest to run the car a bit with the ecu so it can "learn" the new parameters. Also, in jersey, its been pretty warm lately. That will surely affect my reads for the logs no?

 

hahah I tell them its a warning light that we are going Up a hill

 

Just an update:

Loaded the COBB OTS Stage 1 93 HWG map for now until MAP tune comes in....

Drives so much more smooth, power band is even throughout. I was doing some datalogging. DAM never dropped below 1, no Feedback knock, and FKL of about 1.41. AFR was a bit high, but I guess because these run a bit rich. Ran the tune for about 30 miles.

 

clarify "AFR was high" Higher than 14.7 is trending LEAN which is not good. Lower than 14.7 is rich which is "safer"

 

I didn't try LWG/Normal. HWG seemed fine since I had no problem hitting boost on the stock tune. I did remember seeing abnormally high TD Boost Error logs.

I'm going to have to re log when I get home.

 

Also one thing I've noticed, is that I actually have to hit the pedal to floor to get WOT, while before it was like 50%. Just something I have to get used to with the new throttle response.

 

Right. I was told the oem tune is not linear with regard to throttle. It opens the throttle far more than your foot is pushing at light throttle aps to make the car feel faster. Thats why power seems to fall off or even out at midrange and higher rpms. the OTS tunes make the throttle response linear so 50%=50% and 100%=100%

 

Ok. So just did a bit more research. Next log I should have Command Fuel Final AFR to see how it matches up with AFR. Command Fuel AFR will be able to tell if I'm actually hitting target AFR. From some research, It looks like AFR is targeted higher when you're switching gears, so that could be the reason for the high number. At WOT around 3500-5000 AFR should be in line with Comm Final AFR, so I should see around 10.8 - 11.7 for MAP.

Disclaimer: I'm a noob at reading these numbers, and have a general basis of understanding.

I only did about 30 miles on the new tune. I think I should load the MAP tune when I get home, drive about 50 miles, and then ill do some logging. In the worst case scenario, i'll have to switch to a 91 tune with 93 octane, just to be safe.

 

Just an update:

I didn't bother to run any logs or post, but with the new MAPerformance tune, I couldn't be more pleased.

Ran the car pretty hard throughout the weekend to test. No FKL, no Feedback knock( not even in cruising). AFR seemed to be around 11.04 WOT, which is what the MAP tune targets. NO random boost spike, and I hit target boost more than once. I just have to get adjusted to the new throttle response. Where I actually have to hit the pedal all the way to the floor to go WOT. Whereas before, it was just a little more than halfway. So far no complaints, and for stage 1 I would definitely recommend over COBB OTS. I ran the COBB OTS before the MAP for a day or so and I had some FKL at WOT.

MAP does run a little lean, but I don't think it will be an impending issue. (Cobb runs a little rich)

 

ive been running the map stage 1 93 octane in my 18 base wrx for about 4400 miles out of the 6100 ive had the car now. the only consistent, repeatable knock i ever get is -1.41 and only in 5th gear around 48 mph when applying a little bit of load, somewhere between 1-2psi of boost. however it will not record any knock if i am going slower, on my commute there are a lot of small hills on a 40mph road. whenever i hit them in 5th at 40-45mph the car does not record any knock, but for whatever reason if im doing closer to 50 it reads -1.41 every time, strange.

 

That could be cruise knock, which isn't too concerning. If you have high load on the car and you're getting FKL then yes, that would be concerning. Tip in knock/Cruise knock is nothing too serious. You'll likely get knock when you have the AC on too.

 

Yea, you can always flash 91 if you think you're going to be stuck with less than 93. I asked Ian for 91 MAP tune just incase. The 93 tune runs flawlessly. No knock events, and even in cruising.