RomRaider

2006 Forester XT (current mileage 155,000 miles)
4EAT automatic transmission
TD04 Turbo (Stock everything as far as I know)
STI TMIC with scoop deflector modded splitter for full cooling
Cobb silicone inlet (From MAF to Turbo)
Stock STI Catback exhaust
My Daily Driver

So this coming spring, I will be installing a fresh VF39 and Invidia 3" catted downpipe onto my FXT, so started researching Stage II maps and reading a bunch of forums in preparation. This naturally led me back to Patrick P931's 28 page post documenting his adventures in tuning his Fozzy. Read again all 28 pages (love it) and now I'm hooked again so have decided to do some tuning on my existing set-up, kind up prep my and get my brain working for my hardware upgrades this spring. I have copied & pasted nearly all tables from "Patrick's Ultimate Stage 1 and 2" map into my current map, but sticking with my current (stock?) DBW for the time being. Flashed my new "base map" this morning and went logging. As an FYI, no I do not yet have a wide band AFR gauge installed, I have one on the shelf but am going to install it with my down pipe this spring. I log A/F Sensor #1 (AFR), I know it is not ideal

As normal my IAM initially started @ .5 but quickly found its way to 1.0. Attached is my map, six logs and a Learning View. I logged three 2nd gear idle to redline pulls and three 0-80 MPH with tranny in DRIVE pulls. I was very happy to learn that I got no knock (just about) I believe we are to tune FUEL/BOOST/TIMING in that order. My fueling maps are straight from Patrick map and were near identical to my current map, so with no alarming AFRs and no knock, I have to assume I am good for the moment. So I want to start / work on my boost, try to maximize what my baby turbo can produce so here are my observations & some questions from this morning's logs:

2nd gear pulls:
First, I'm not reaching my target boost until about 3000RPM. I know my TD04 should be able to come on a little lower than this. 1st reaction is to increase my wastegate duty cycle on the appropriate cells down low. Thoughts or other suggestions?

From 3000-4000 RPMs, I maintain (or slightly exceed) my targets and then from 4000 through redline, target boost is not reached, falling off to around 10-11 psi at redline. With my Initial WGDC set at 80 & Max @ 90, I suppose I can bump those up to 90/95 to see what happens, but what else might I try? Or are my numbers pretty good/typical for a TD04?

0-80 MPH in DRIVE pulls:
In 1st gear to my 2nd gear shift, I'm getting decent boost close to target at 3200-5200 RPMs and then kind of falls on its face to the shift @ around 6400. Again turbo is not spooling up as early as I think it should for a TD04. Thinking that bringing up the 1st two WOT WGDC cells to see what happens. Thoughts or suggestions?

At the 1st to 2nd gear shift, loads increase, RPMs drop to 4200 and my boost almost immediately starts hitting (or slightly exceeding) my targets from 4600-5300 RPMs. Then boost falls off again until redline/2nd to 3rd gear shift. I guess I keep going back to increasing WGDC, but what might I be missing? Patrick's Stage 1 High Boost maps have higher timing than his Ultimate mad, thought I might load these timing maps into a flash and see what the result is? A good idea or bad? Oh yeah and I do see the AFR lean out at the shifts, assume this is the TCU fuel cut?

At the 2nd to 3rd gear shift (from 6400-4200 RPMs), again I immediately start hitting my boost targets until my speed far exceeds to limit and/or the guy in from of me' bumper is quickly approaching. I have to assume boost will be good again until 5300 RPMs again and then fall off after that. I don't see myself getting into these speeds much in real life , but things seem consistent at these RPMs and loads. I will add that on my 3rd 0-80 pull, I saw my only knock, FBKC pulled -1.41 degrees of timing at 1700 RPMs @ 1.4 g/rev, backed it off to -1.05 at 3000 RPMs @ 1.94 g/rev, backed it off again to -0.7 @ 4600 RPMs @ 2.63 g/rev and finally back to zero timing pulled at 5500 RPMs @ 2.31 g/rev load. Since this was my only occasion of knock I experienced, I am not too concerned with making any changed to timing at this time. The only question that arises from this is my g/rev tables mostly (or all?) stop @ 2.5 g/rev. Should I be concerned with any required changes or will the settings at the 2.5 g/rev cells carry on and upward? Thank you!

I was supposed to start some home improvement projects but I can see already the tuning bug has caught me again and is already consuming my mind and my time. Love it!! Any and all recommendations and suggestions are appreciated! Again wanting to maximize my current set up, get as much as my TD04 can provide, but keep a safe tune to keep my Fozzy on the road. Thanks in advance for your feedback!!

So I have performed a couple more changes & ROM flashes. For this post, since I had essentially no knock (very happy!), I decided to load Patrick's Stage 1 R12 base timing table (a little more aggressive) and AVCS table into my ROM. Flashed it and did some logging. Again, no knocking Really not much change when reviewing my logs, but let's talk about my ROM feels when driving. Under full throttle, my Fozzy is pulling really hard from the bottom, I think I can feel it fall off a little as I approach redline, the shift is pretty firm, a very slight hesitation (TCU fuel cut) and then bam hard pull again. Its cool I can feel what I see on my logs. Boost falls off in the upper RPMS then when I shift boost is back up to target and I can really feel it in the car. Both 1st to 2nd and 2nd to 3rd shifts are this way. So full throttle, I love how this ROM is feeling, part or light throttle, not so much. Getting a weird surging. For the moment, I'm content with my boost, will get back to that, want to focus on this surging. Please see my attached ROM & Logs

So loving everything so far at full throttle, Patrick's tables have definitely woken my Fozzy up. But not liking this light throttle surging. So I initially think maybe its my AVCS table, truthfully still trying to learn about AVCS, I load my stock AVCS table into my ROM. Just for fun, I went ahead and bumped up my initial & max wastegate duty cycle tables just to see if that helps in the boost. r2 and logs attached. If anything, I lost some power on this ROM, boost numbers are a little down. Surging still there.

So now I've caught you up to where I am today, 1/19/2020. Going to start by flashing back to my last ROM (r1), as there was no felt change to the surging and I lost some power up top on r2. So let me explain the surging.

Under light throttle acceleration I feel, hear and see (tach) a surging. Under super ligh, moderate and full throttle I don't observe the surge. I decided to try to capture the surging in some logs and I think I have (see attached log). The surging occurs between 2600-3000 RPM, 1.44-2.05 g/rev load, throttle opening 26-37% Where I am seeing the surging in the logs is in my boost (manifold relative pressure (corrected) (psi)) (this is what I use, is this right?). There is a stretch the logs where my target boost is in the 3.7-3.8 psi range and my actual boost surges or oscillates from 2.6 -6.53 psi. Again pretty cool that I can see in the logs what I am feeling in my FOZ.

So I spent some time online reading on what this surging could be, found some old posts etc. Some say it could be my timing needs advanced in these ranges in my tables. Sticking with Timing, could be related to my AVCS table? Still pretty lost with AVCS, but trying to learn. Also found some posts suggesting this surge is occurring during a closed loop/open loop transition, which makes sense, definitely could be in transition, so might try adding the 0-1 parameter and go do more logging. Kind of looking for some help here, where to start. Going to keep reading and start trying some things but would really love if someone could take a look at my current ROM and give me some things to try, flash & log. Give me some parameters to log and help me diagnose and resolve this surging. My r1 ROM is attached along with my best surging log (Excel rows 22 thru 83)

I appreciate any and all suggestions & feedback!! Love this forum!!

Flashed r3, returned my timing tables to Patrick's Stage 1 High Boost r12 since the pull felt and logged better and changed my CL to OL Delay back to stock (A1 1250, A2 1250 A3 750).

Went out and ran one long log, just driving around trying to get as much surging as possible. Logged CL/OL status & AFR correction to try to troubleshoot the surging, log attached. Pretty much ruling out that the surging is occurring during CL to OL transition.

I have noticed that my AFR in Learning View has creeped up (down?), getting a -3.30% at 0.00-5.59. I scaled my MAF several months ago and had my AFRs in Learning view pretty close to zero, so maybe the larger changes to my ROM has had an effect on my MAF scaling. I remember after getting my MAF scaling dialed in (in my car and my son's 05 FXT), the cars drove much smoother at part & light throttle. Thinking this will be my next step, get my MAF scaling dialed back in and see if this helps with the surging. Probably tomorrow morning before I can get out again.

Attached my current ROM, one Log & my Learning View. Would love to hear some thoughts and suggestions, but don't mind talking to myself

nice job !!!
i follow u on this tread im in learning to tune my 05 foz xt
i have a lot of stuff to put on it (turbo injector fmic etc ...) and for now i juste play with what u guys did
i try ur table the car run good i got some knock on shift sometime really rare ....

So I have flashed my ROM about eight times since my last post. After more reading on light throttle surging, I came a conclusion that wgdc was too high for lower boost request. I zeroed out several cells in my initial and max wgdc tables and the surging is all but gone. I have read several times that other people’s maps will work out of the box but that often wgdc adjustments will be required to suit each individual car. I think I have experienced that here.

Next I went on three MAF scaling runs and pretty much have my AFRs dialed in for CL. Everything is 0.5% or zeros again. I also adjusted my scaling ranges to 0-10, 10-20, 20-40, and 40+. Read that somewhere.

Did some logging, surging is gone and did some second gear pulls, power feeling pretty good and absolutely no knock, nothing at all anywhere. I am content with my boost at this time. My TD04 is spooling at around 3000 RPM and holding boost until about 5000 RPM and then of course falls off up through redline. I could continue to work on this but don’t see the point since I will soon be installing my VF39, Invidia 3” downpipe and installing my Innovate MX – L wideband soon. I will work more on boost once I have those installed. I am also happy with my fueling for the moment. I have my tables matching Patrick’s Ultimate Stage 1 & 2 and have no indication of any fueling problems (I know I know, no wide band so hard to see)

So time to work on timing. I know not having any knock is a good thing but I have not had any knock at all these past several rounds of tuning. I know I am leaving power on the table, so I did some comparing of my timing tables to Patrick‘s Ultimate and Patrick‘s stage 1 high boost r12. I changed my base timing table to match Patrick‘s Ultimate (thought I had done that already before?) and went out and recorded some logs. Really no change in seat of the pants driving feel and still no knock at all. Did more reading on timing and was reminded of the equation, Total timing = Base timing + (IAM x advance timing) + FBKC + FLKC + other compensations. I looked at my Advanced table and saw that it is much lower than Patrick’s Ultimate so went ahead and matched my Advanced table to Patrick’s ultimate and went logging. Immediately felt more power down low and mid range, did some second gear pulls and some 0 to 80 in drive pulls, power is feeling good and I finally got some knock (yes was happy to get knock) from 5900 to 6400 RPM in the 2.0 to 2.3 g/rev load ranges, my ECU pulled anywhere from 2.4 to .7 degrees of timing. I have made some slight tweaks to my Advance table in those cells but have not flashed that ROM to my car yet, maybe tomorrow.

So pretty close to being happy / content with my tuning for the moment, a little more tweaking to my timing to make sure my high rpm knock is under control. My Fozzy is driving awesome, quick acceleration down low and mid-range and the big boom up top. Full throttle anywhere is a scream (pun intended) I am now experiencing the loss of traction that I have heard others mention as in first gear starting out all four wheels are trying to spin. Yesterday I was pulling out of Taco Bell (fine American Mexican cuisine) and needed to get into traffic and had a smaller gap to get into, so turning left slight incline across both lanes I gave it a bunch of gas and proceeded to do an unexpected four wheel screaming burn out. It was loud, completely unexpected and got my adrenaline pumping and a huge smile from ear to ear. This tuning has definitely woken my FXT up.

So what is next, I need to continue to collect parts gaskets etc. to swap my turbo and downpipe and install my wide band, maybe a month away from starting that project, so will be reading up again on VF39 and downpipe tuning. Before then I want to play with Throttlehappy’s DBW settings as he has me quite intrigued. His posts talk of smooth acceleration and smooth shifts which sounds great to me, as my 4EAT does like to hunt around for gears and lock-up under light throttle, especially with the shifter in drive. The full throttle at 60% pedal travel sounds weird, but I am willing to check it out for myself and will be soon. My expectations for my VF39 and downpipe are a safe 18 to 20 psi from 3000 RPM to my redline (6500), I will work on my target boost and WGDC to meet those goals or try to, and then work a lot on my low to mid RPM, part throttle striving for smoothness and torque. With the wide band I will also be able to finally tune my Open Loop AFR's which I have never been able to do up to this point.

And to Cbast, thank you for following my posts and I am happy that my tables are working decent in your FXT. My ROM is entirely based off of Patrick P931’s Ultimate stage 1 & 2 ROM and I have been inspired by his tuning experience, fully documented on this forum from several years ago. His documented experiences and his ROMs are mentoring my journey. Thanks Patrick, Throttlehappy and Romraider for contributing to my newest hobby!!

Attached are my current ROM with Logs that included the knock. As always any suggestions, feedback or contributions are very welcome and appreciated.

keep up the good work any updates

Thanks cloudizzle!!

I went ahead and flashed my ROM one more time, pulled a little timing in the cells where I had the minor knock, went out and did some pulls and some cruising and experienced no knock, hurray! I'll try to get my current ROM uploaded soon (added), I would call it a great Base MAP for a nearly stock 06FXT. Pretty much just been driving back and forth to work, not too much full throttle but I know what is there if I need or want it. Been burning through some fuel these past couple of tanks, I wonder why?

Did a bunch of reading on AVCS tuning and have some ideas to try, but not yet. Also will be playing with Throttlehappy's DBW ideas but again not yet. I am wrapping up my VF39 rebuild, have received all of my needed gaskets, and yesterday had my wideband bung welded to my downpipe. (Getting pumped!) Also bought a gauge bracket for my wideband and have researched my Innovate install. Was nervous on how to incorporate the wideband into my logging routine, but will cross that bridge when I get there. Going out of town on my days off this week, but looking pretty good to install everything next weekend

I need to modify my ROM for my initial drive. Going with fresh oil and will just cruise around a while to get the turbo "broke-in" before I try any boost. My plan is to leave my fuel where it is, pull 2 degrees Timing across my whole base timing table, leave my Target boost where my TD04 is happy, but then start with my Wastegate tables @ all zeroes. Drive around and just feel things out, some cruising and light to medium throttle stuff logging the whole time and then go home and see what my logs are telling me. From there, bring in some WGDC and start with some boost tuning to see how my new turbo reacts/performs. I know I'll be nervous to go full throttle, but I think with my fuel "assumed good" (and verifiable with my wide-band) and timing pulled back, and if my logging doesn't reflect any issues, shouldn't take me long to get the long skinny pedal on the right to the floor. Then of course I will want to work a bunch on my OL fueling, that will be a whole new learning experience for me, but excited to go there

So that's my updates. Love how my Foz is driving currently and am excited to see what the bigger turbo and downpipe bring me!!

I have a USDM AT 05FXT, stock timc, td04. I've added a grimmspeed limited catted divorced dp and 3' fujitsubo catback.

Do you think I can run this map on the 05?

hi i run his map on my foz with small ajustement

running good !!!!!

hey buddy thanks for the reply! Would this run ok with stock usdm 05 injectors?

Hey man thanks for the update sounds like your having a blast been busy with doing paint correction on my new to me usdm 04fxt but did add a nividia 3" DP so looking into ways to get learning on how to tune this thing also got a used vf43 coming but i will start tuning with stock turbo for now and get my wits about me soon as i get it back out of the shop and driving ill start doing some logging and post here

Should be fine with stock injectors, mine are stock. Just make sure you log knock just after flash. One thing to note is in '06, Subaru changed the intake manifold and the compression ratio was increased slightly. Your '05 will have lower compression so less likely to knock. Good luck and happy tuning!

All I can say is read, read, read, a lot of great articles & posts on this website and others, I am still very new but learning every time I make changes and log. When I'm not sure, I do more reading until I think I understand it. Would be easy to take my Foz to a Pro-tuner and fork out some cash, but wouldn't be nearly as fun! Good luck with your tuning!