RomRaider

Well, I can get both of you some logger defs to monitor the normal calculated wastegate duty (as determined by the initial\max wg tables and wg compensation). If you logged this against actual wastegate duty, we would be able to determine if wgd is being manipulated and by how much.

You rescaled the MAF on the 07STI right? Have you logged over 4.5 volts?

Thanks. I just want to rule as much out as possible before creating the free Stage 1.

-Gabe

The '07 STI maf was not rescaled, it was using the stock airbox. I saw 4.56v @ 6800rpm, that run saw 274.5g/s.

Interesting... We will see what I get on Stage 1. This was on the updated SOA code correct?

-Gabe

hmm... that is interesting.

I'm running the factory NON FIX ROM. The crappy one with the cookie monster bite out of the torque curve.

Are you running a manual boost controller? Or was that all stock boost and everything? That's really interesting...

I would think Braden is running the latest code. I am. No, he does not use an MBC, that is with the factory boost control.

Some more 07 sti stuff:
Gabe ran some logs for me to help shed some light on the timing strategy in the 07 STis. It appears quite convoluted in the code. There are no less than 7 multipliers total involved for both base timing and timing advance. However, in practice, many of these multipliers are zero which greatly simplifies the logic. Here's what was learned from just this logging session. More logs will be necessary to determine if the multipliers with no value change at all:

Based on what Gabe logged, Timing Advance A and B are not used. Timing Advance D is used seemingly when cruising or during lift throttle (could be some other factors - not sure) and Timing Advance C seems to be used when accelerating (also could be some other factors). The switch between these two maps is gradual and there is sometimes a delay before the switch even starts. For example, if you are accelerating and using all of Timing Advance C and then you lift off the throttle, there is a pause before it starts using a combination of C/D and then reverts to D.

For Base Timing, it is similar. Base Timing B is used during acceleration and Base Timing A during cruise/lift throttle. Again, it gradually transistions (about 1-2 seconds).

However, if some of the mutlipliers change from a non-zero value this may activate Timing Advance A and/or B and possibly disable C/D. For Base Timing, as long as map A and C are exactly the same and B and D are exactly the same, the logic will still be the same.

man, you are awesome.

All I see is a bunch of numbers and letters in those damn ROM files.

would you like me to send you my ROM and logs from it? would that help you establish relationships to various parameters?

I PM'd you logger defs to help identify the wgd cut issue.

You have to use the right tools to disassemble and analyze the rom (ida pro). Still, it is not easy.

Using EcuFlash and XMLwrite I was able to find the maps for desired torque on an 05LGT rom.
There are a couple of maps associated with it and I haven't got it all figured out yet.
But what I did figure out is this:
On ROM a2wc510N
Torque is in Nm and is the X axis(cbd00). It ranges from 0 to 320 N m.
RPM is the Y axis(cbd44). 800- 6800 rpm
The data (cbd84) is a value from 0 to 84. Not sure what the exact relationship is yet.

There is another where the axis are reversed. X is rpm and Y is torque.
it's address is: cc3c4 for data, cc348 for X, and cc384 for Y axis.

I found another map where the Y axis was 0 - 84. The X axis looked like RPM, but that's a guess. The data was a smooth curve from 0 - 100. I'm assuming that's a percentage... but that's all that I know.
it's address is c2110 for data, c20c0 for X, and c20e4 for Y.


on the 07 STi the torque is 0-375 N m
the values are again 0- 84.
However, I don't know the addresses on this one.


I hope this helps.
I don't have any idea what the significance of 84 is...

The x-axis for that map is related to throttle duty. I don't think this has anything to do with any kind of wastegate cut, which I still haven't seen any evidence of to begin with. If you can log with the xml file I sent you, we'll know for sure if the ecu is cutting wgd or not. The fact that Braden hit over 4.5 mafv with an 07 sti, makes this questionable. That is, the problem needs to be verified first and the cause second and then the solution. It is a waste of time to try to fit a table that you think matches your guess. The units could be anything and with as many tables as there are, it is a backwards way to approach an issue. Trust me, I've tried it before.

k.
we're going to go log right now, been waiting for the laptop to have a decent charge. You sound very skeptical of this type of limit. However, I can assure you it's there..... maybe...

That bottom table looks like the throttle actuator duty map without the % duty conversion. "Desired torque" could mean in this sense that the throttle plate does not have to have a linear relationship to the accelerator pedal - like the stock map, for example, where throttle duty is artificially high at low throttle inputs. This doesn't necessarily mean that these tables involve limiting power at high airflow in some way. Again, first you need to verify this actually happening and if so, determine how it is being accomplished.

i gotcha partner.

You are probably right.

my guess is that I probably have the initial wastegate too low, and when you combine that with the very small values for turbo dynamics (due to a blocking 3 port solenoid) it never has the time to raise the duty cycle to even try and achieve target boost.

i took some logs today, and of course I couldn't get the problem to recreate itself in as dramatic fashion as it was before.

how would you like me to deliver the logs that I do have to you?


on the wife's LGT, I can't do a dyno pull properly.

Because when I put it to the floor in 3rd gear at 2k rpm, it locks the wastegate duty cycle at 30.2 until somewhere around 4k rpm. Then it tries to make boost again, but then it's too late because the turbo is out of breath that high. If I do a pull on the road from a lower gear, then the wastegate acts normal. If I'm on the street low in 3rd or 4th and I punch it, 30.2%. Makes very little boost and is very annoying.

I guess I'm paranoid that the 07STi has something just like that.