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Old 02-26-2010, 09:40 PM   #1
cueball89
Scooby Specialist
 
Member#: 90513
Join Date: Jul 2005
Chapter/Region: Tri-State
Location: NY
Vehicle:
2003 wrx wagon
black

Default Closed Loop Vehicle Speed table?

This is for an 07 wrx mt. This is what the cobb help file has,

Quote:
Closed Loop Vehicle Speed
Table Description a simple two-value table that represents a switch for open to closed loop fuel control.
The values are vehicle speed. Below this speed the car MAY run in closed loop if other conditional
parameters are met. Above this speed the car will transition to open loop fueling.
Tuning Tips None at this time.
I noticed that the stock map has it set at 81 and 87. The vf39 93 octane map from cobb has it set at 62 and 68. I normally cruise down they highway at 70-75. It sounds like the car is in open loop going down the highway? What effect will putting the values back to stock have on a vf 39 setup? Would the car be smoother and get better gas mileage?

07wrx
vf39
catless tbe
k&n panel filter
cobb ots vf39 map
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Old 02-27-2010, 09:28 AM   #2
Cobb Tuning
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Member#: 4803
Join Date: Mar 2001
Location: Austin, DFW, Portland, SOCAL
Default

This table represents the max. speed for which the closed loop to open loop transition "delay" can occur, not the switch to open loop. The final determination for the switch to open loop is dependent on your primary fuel map where cells are richer than a specific threshold (usually around 14.1:1 AFR or so depending on ECU) would determine the switch to OL. The closed loop tables all have the purpose of determining what kind of delay will exist (if the current delay is non-zero) before checking the fuel map to then determine if the switch to open loop will occur.

Sorry for the confusion. We will look at updating the help file in the future.

Bill
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Old 02-27-2010, 09:59 AM   #3
cueball89
Scooby Specialist
 
Member#: 90513
Join Date: Jul 2005
Chapter/Region: Tri-State
Location: NY
Vehicle:
2003 wrx wagon
black

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Thank you for the response.
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