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PossumLink Boost Control


Sancho

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Hi there,

 

Before I go and get my car tuned I'd really like to have sorted a few things out so I can save a whole heap of time on getting this boost control stable. 

I haven't had much luck getting the boost control to not grossly overshoot the boost target. I have my boost target set to 1.05bar but it will massively overboost as high as 1.3bars... and is generally unable to control it at all.. 

Would like to think it's workable and not just "better off with a boost tap" like some people have told me.

 

Have attached the print out file of settings, if anyone wishes to have a look would be good.

Car = MY96 WRX

EJ20, 8.5:1 CR Pistons, Yellow P2 Injectors, TD05 (90Deg) Mostly Equal headers, 3" Turbo-Back exhaust, Wideband Oxy, and have got the fuel table for around 10.5:1AFR under full boost.

Perhaps I've done something wrong, or Everything wrong and I'm just lost and should leave it alone, but then i'd never learn anything.

,

File Name:  C:\PCLink\4.6.16.pcl

Printout Date:  7/06/2016

Printout Time:  01:02:15

NOTES:

 

 

LINK MEMORY DATA

Configuration

Limits

MAP Sensor = Factory    Advance Limit = 30°

MAP Limit = 210kPa    RPM limit = 7300rpm

Lambda

Closed loop Lambda = Off

    Lambda Targets Table

Target Area

    Idle    Cruise    Rows 3    Rows 4    Rows 5    Rows 6    

    83    78    82    84    86    87    

Utilities

TPS High = 58    TPS Low = 2

Idle Speed Control

Temperature Switch = 85°C    Idle Cold  = 48%

Idle Hot  = 38%    Idle RPM = 900rpm

Fuel

Fuel - Auxiliary

Master = 90    Clamp = 35kPa

Cold Start = 60    Crank Enrich = 55

Fuel - Accel

Volts Correction = 15    WakeUp Pulse = 3

Knock Control

Knock Base Target = 100    Knock Control = On

Boost Control

    Boost Table

Engine Speed (rpm)

    250    750    1250    1750    2250    2750    3250    3750    4250    4750    5250    5750    6250    6750    7250    7750    

MAP (kPa)

    140    150    160    205    205    205    205    205    205    205    205    205    205    205    205    205    

Wastegate Base = 40    Wastegate RPM = 3200

Wastegate Sens. = 7

Fuel Table

    Fuel Table

Engine Speed (rpm)

    250    750    1250    1750    2250    2750    3250    3750    4250    4750    5250    5750    6250    6750    7250    7750    

MAP (kPa)

20    90    92    95    95    90    94    94    93    93    93    93    93    93    93    93    93    

60    100    100    100    100    95    95    95    100    102    102    102    102    102    102    102    102    

100    101    101    101    101    101    99    99    101    105    106    110    110    110    110    110    110    

140    117    117    117    117    117    117    117    117    125    125    125    125    125    125    125    125    

180    130    130    130    130    130    130    130    130    130    130    130    130    130    130    130    130    

220    135    135    135    135    135    135    135    135    135    135    135    135    135    135    135    135    

Ignition Table

    Ignition Table

Engine Speed (rpm)

    250    750    1250    1750    2250    2750    3250    3750    4250    4750    5250    5750    6250    6750    7250    7750    

MAP (kPa)

20    15    16    16    20    28    28    28    28    28    28    28    29    30    30    30    30    

60    15    16    16    18    25    25    25    25    25    25    26    27    28    28    28    28    

100    0    10    10    15    16    18    20    22    22    22    23    24    25    26    26    26    

140    0    5    10    12    12    12    15    17    19    21    22    23    24    25    25    25    

180    0    5    10    10    10    10    11    11    13    14    14    17    17    19    20    21    

220    0    5    10    10    10    10    10    11    11    12    14    16    16    17    19    19    

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Apparently I haven't set it up correctly, the manual is what I referenced to set it up, but the help file has another method which I didn't know about, as I wasn't using Windows XP until now.

 

apparently you set sens to 0 and base to 0 then adjust as per rest of steps?

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bhs the G1s didn't have open loop mode in this case.

The base is the duty cycle the solenoid is supplied at the start of control so a lower base is a good start.

Also lowering the sense will also help. You can think of sense as the P part of a PID set up.

 

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