RomRaider

No logs yet..I will try to do some tonight. It is important to note that since I did not log afr after the swap, my maf scaling may be way off..I will check it tonight. If they are on target I am not going to be able to go over 5,000 rpm at WOT.

Wife is not going to be happy about more money on mods...I may have to live with this for a while.

On the plus side... it looks like it's going to be awesome.

You can use your DBW tables to limit throttle to 70% above 5500 rpm.

Tune it for 2000 to 5000 rpm and you'll still have a very driveable car until you get your injectors and pump installed.

My maf is way off..about 8-12% lean in some places.

Here is my 2000-3000 5th gear log:


Here is my lame attempt at doing a 2nd gear WOT log without blowing up my car:

Here is some cruise data:


Next steps is reducing the DBW table so I could get a full 3rd gear run to redline and scaling the maf.

Here is my LV after about 30 minutes of mixed driving..mainly highway cruise. :


Here is the current map I am running:

Wow. That's crazy.

How do you get your peak boost so consistent? Mine continuously bounces back and fourth between about 17-19 psi.

MickeyD is the one who really dialed in my boost..if you look back at the earlier post you could follow the changes we made.

I have not had a chance to work on the car this week but I have had a lot of time to think about it. I am starting to think my issue is DP related.

Reasons why:

- Invidia is notorious for causing overboost (because of the divider interference)
- When I try to manually open the WG, there is a clear point where it hits something and stops (I am not sure if it the actuator arm limit, or the DP divider)
- I cannot find a single example of a VF48 overboosting as bad as mine is
- Everything is fine (8-9 psi) until 4500 RPM than it seems as though the boost skyrockets. I think this would be consistant with the WG opening partially (at lower RPM) and because of the limited ability to open fully, the boost spikes.

I have confirmed that with the actuator arm disconnected, the flapper should open a full 90 degrees. I will disconnect the arm tonight and test open it. If it hits something before 90 degrees, it must be the DP causing it.

FWIW the VF52 I was having problems with, and the Invidia DP we had did not contact at all.

I believe the actuator should move about 12-13mm total when anything over 12 or 13 psi is put into it.

Yeah...just compared the movement of the flapper to the movement in my friend's stock downpiped 06 STI, the movement is almost exactly the same as mine, it is very clear it it not the DP divider causing a contact issue.

I tried adjusting the DBW to limit the throttle opening to about 80% above 4500 RPM..it did nothing, not only did I max out my stock injectors, but it also maxed out my maf g/sec (@300). I need to adjust the DBW even further, maybe down to 50% throttle above 4500 rpm. Log:

With regard to the maf g/sec limit, it there a work around or do I simply need to raise the limit? I am not even close to 5V of mafV...so I think I have plenty of room to raise maf g/sec cap?

Yeah, you didn't drop the throttle enough.

You're starting to lean out above 285 g/sec. Even though your IDC is over 100%, you still have a little more headroom due to the elimination of latency (injectors are running static).

For the 300 g/sec, you need to raise the threshold. It's one of the parameters in the rom.

Can you post your rom?

I don't think you adjusted your DBW correctly. At 6000 rpm, your throttle plate is at 81.57 percent.

Thanks MickeyD, I noticed that too..looks like I capped it at 70& raising up to 80%.

Here is the latest Rom reflected on the log...I did not try to smooth out the req. torque table..I was just trying to bluntly cut the throttle to get the boost a little more under control.



I am in the process of trying to rescale my maf with the bits of data I have..it is all over the place right now..lean, then rich, then lean again. Snow started falling right now..so no more logs for a while.

This is my work in progress map; revised DBW, raised the maf limit, rescaled the maf (up to 310 g/sec). I also did some other slight tweaks and changes regarding rough correction and fine correction ranges...this is stuff I had been meaning to do to my previous ROMs.

You can't really scale your MAF above approximately 275 g/s. The injectors will start to run static and the AFR will be whatever you get. It will be slightly rich when it initially runs static (latency suddenly eliminated) and then it will run lean when you run out of fuel. You can't control it until you get new injectors (and fuel pump).

BTW, don't run larger injectors with stock fuel pump.

Yep...looking at DW740s and AVO pump. Do you think the 16-17 psi at redline is too much for the vf43...even with injectors and pump, I hope it is not going to become a flame thrower in the warmer weather..