I have been able to reproduce this. and I am currently detuning from this point until I can upgrade a few things to get a handle on knock at these levels.

keep up the input Armagedon, I dont mind spending a few seconds to muddle through a little broken english for some good info

I have been able to get rid of spike and wavey boost at the 19-20 psi range just removing the solonoid pill and ecu flash. error correction plays the majority roll in this

 

What is your wastegate duty setting with pill removed? Also what plugs are you running. If you are running stock 7's you may want to drop down 1 heatrange to 8's

 

well it makes sense that once you added error correction back in, the boost went down; assuming the desired load (plus offset) turns out to be equal to a load value that would produce 20psi on your car. did it hold 23psi all the way to redline? if it did i would say your boost gauge is a little off; if you just saw 23psi for a little bit then im pretty sure changes in weather could have caused that. but im pretty sure evo_kid is right about with the restricter pills in the most boost you can see is around 20-22psi. if you dont trust your boost gauge one thing that i do is compare my load values per rpm with another evo with the same mods (same cams, similar exhaust setup, both of us running the stock intake with a k&n) running the same boost taken in similar weather, and same gear.

 

i do not think that it has been determined exactly when each max wastegate map is used, if it has then i missed that post(s).

it could if we saw different load values in each gear; if your error correction is 1/2 of stock that just means when your car sees a difference in load, it will add/subtract from the wastegate duty value only 1/2 of what the stock error correction map would add/subtract.

 

I'd like to believe its true, but I haven't seen any good evidence besides the one guy who mentioned it. The MWGDC values are all set to 100% on the stock tables which means that if a gear based map selection is active, Mitsubishi isn't using the capability on factory cars.

I think Mitsubishi deals with the boost vs gear issue with the Max Load table.

 

disregard.... I have done some playing and discovered some inconsistancys I am a dumbass at times.

 

After a few more adjustment on Ecuflash I was finally able to remove the mbc effect (less boost on low gears, more boost on higher gears), this was done by using the boost error correction. I strongly suggest you guys messing with these intead of just changing everything to zero. Have you guys ever wonder why the factory set, the first four to 8.0 and the last four to -13.0? By messing with the boost error correction I notice that the first four adds more loads (more boost) on lower gears, and the last four put less loads (less boost) on higher gears:

-20.0 = 8.0
-17.5 = 8.0
-15.0 = 8.0
-12.5 = 8.0
-10.0 = 6.5
-7.5 = 4.5
-5.0 = 3.5
-2.5 = 2.0
0.0 = 0.0
2.5 = -1.5
5.0 = -3.5
7.5 = -5.0
10.0 = -6.5
12.5 = -13.0
15.0 = -13.0
17.5 = -13.0
19.8 = -13.0

I also notice that when the boost control load offset is set at 80, the ecu is actually removing loads on 3rd gear, by changing this to 100 the ecu did not start removing load till 5th gear. I set my boost to 22 psi on 3rd gear, remove the taper by using the max wastegate duty, then lower the boost on high gears by changing the last four to -20.0:

12.5 = -20.0
15.0 = -20.0
17.5 = -20.0
19.8 = -20.0

I also notice that having both restrictor pill actually helped removing the spike, when I remove the one close to the solenoid all I get is spike on low rpm.

Just remember all evos are different, let me know if this works for you.

 

Nice information

 

Thanks I will try this, I have been making alot of changes to boost error correction in my attempts at better control and that low boost in low gears has been driving me nuts . I figured there was a map that wasnt found yet contoling this.

 

some of us zero out the error correction because we remove the restrictor pill(s), and we want to find the wastegate duty values that will put us at our desired boost level. Besides the error correction is just going to adjust the value in the wastegate duty. After you get the boost were you want it just log the load that you are seeing and enter those load values you logged into the Desired boost load(desired load + offset = total load); then just fill the error correction back in. If your wastegate duty values are all at 100; I do not believe you can increase your boost anymore. Which would make increasing your desired load, or offset values with the error correction enabled useless. Which I believe is part of the reason Evo_kid did this write up(to boost past 22-23psi using the the ecu).

 

that is alot of work that a mbc can do safer IMO

 

On a side note...
screw MBC's that sell for over 100 bucks.
Get an EBC for just a tad more and have way more adjustability and often times a boost gauge built in.

 

Easier, but not safer. That's the whole point.

 

OK -- I have installed the #58 pill and am not seeing the boost in 3rd gear that I had hoped for (was hoping for 24psi)....I have set the WG duty to 95 from 500 to 7000 RPM but am not getting the additional boost...

Any advice? For those that have a #58 pill, what are the WG tables and offset and correction factors used? Thanks in advance

 

I was curious to know if anyone know the inside diameter and length of the restrictor pill closest to the OEM BCS. I misplaced my OEM lines so the pills are gone and I am trying to replicate them.

Yes I know I could just buy them but I have some aluminum rod lying around that I could use.

Thanks in advance.