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Old 06-23-2017, 07:59 PM   #1
JarHarms
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Member#: 138994
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: DeKalb-ish, IL
Vehicle:
06 WRX Ltd
02 Forester S

Default Gear Determination Tables

Looking for the factory threshold values (rev/mile) for the Gear Determination Tables. Yes, I am aware those can be calculated off datalogs but I am wanting to compare to some other factory set values. I searched around and have not found anything hinting at factory values...just values that those had calculated.
I already have the 2006-07 WRX 5MT values [7762.11] [5003.14] [3539.61] [2615.40] [402.34] from my AP. However I can't use those for my investigation since my car is 6MT swapped with a non-typical gear set.

Looking for the following groups. The should be the same OS or AP. If these were modified using AP then the compare to stick values would also work.
2004-05 Imp STI values
2006 Imp STI values
2007 Imp STI values
2006-09 Leg SpecB values

I you happen to have these, could you kindly share?
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Old 06-26-2017, 09:24 AM   #2
no694terry
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Location: Pittsburgh PA
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98 Forester S/t
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i can share how i figured out to calculate them.

First you need a gear chart from rallipsec or others

Then its (tire rotations per mile) x (Final drive ratio) x (gear ratio) for each gear.
Then you and 1st and 2nd gear values and divide that total by 2, that is the first value "max 1st/min 2nd" and repeat for each box. Each final value is the average between each gear.

for example, my 98 forester raw values are

with 245/40/18's tires are:
1st = 11,434
2nd = 6,809
3rd = 4,661
4th = 3,509
5th = 2,516 engine revs per mile

So then take 11434 + 6809 = 18,243 then dived in half. So value 1 becomes 9122. I tested with logging and it works out perfectly as i shift through gears
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Old 06-26-2017, 11:50 AM   #3
JarHarms
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Member#: 138994
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: DeKalb-ish, IL
Vehicle:
06 WRX Ltd
02 Forester S

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Quote:
Originally Posted by no694terry View Post
i can share how i figured out to calculate them.

First you need a gear chart from rallipsec or others

Then its (tire rotations per mile) x (Final drive ratio) x (gear ratio) for each gear.
Then you and 1st and 2nd gear values and divide that total by 2, that is the first value "max 1st/min 2nd" and repeat for each box. Each final value is the average between each gear.

for example, my 98 forester raw values are

with 245/40/18's tires are:
1st = 11,434
2nd = 6,809
3rd = 4,661
4th = 3,509
5th = 2,516 engine revs per mile

So then take 11434 + 6809 = 18,243 then dived in half. So value 1 becomes 9122. I tested with logging and it works out perfectly as i shift through gears
I do have all the gear and fd values so I can probably work through that calculation pretty easily then verify with some logging.
Just so I am clear, your 11434/6809/4661/3509/2516 values are the raw values you calculated from (tire rotations per mile) x (Final drive ratio) x (gear ratio), correct? Not an actual ECM calibration value.
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Old 06-26-2017, 12:19 PM   #4
no694terry
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correct, those are the raw revs per mile. you need to divide 1st into 2nd, 2nd into 3rd, etc.. You wan the halfway points. How they come up with the 5/6 is beyond me. But my rom only has 4 spots 1 X 2 X 3 X 4 X 5 so i dont worry about the last one
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Old 08-17-2017, 08:42 PM   #5
JarHarms
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Member#: 138994
Join Date: Jan 2007
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Location: DeKalb-ish, IL
Vehicle:
06 WRX Ltd
02 Forester S

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Still no headway on getting any OEM values but...if anyone has the ATR for those vehicles and is willing to share

I did get around to calculating some values based on my specific setup (6MT swap, usual gear set, tire OD) and got [9124.20] [5837.25] [4130.84] [3151.74] [2483.47]. Just ran some test/datalogs of the existing determinations (poor performing) and these new values (improved performance). So far so good.

The original 2006 WRX 5MT determinations [7762.11] [5003.14] [3539.61] [2615.40] [402.34] were only accurate on 1st, 2nd, and 5th gear. All other gears were off a good amount. 6th would not even register at all. I suspect FHI added the 5th/6th determination cell into all of the 32bit ECUs. Using 402.34 for that 5th/6th cell essentially omits 6th gear indication from occurring on a 5MT configured vehicle. I tried to use my same calculations to get back to the original 5MT values but they were off a bit. There may be some level of tolerance built into the FHI values.
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Old 08-18-2017, 01:21 PM   #6
no694terry
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all the mods!

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interesting. mine work perfectly, as soon as i let the clutch out it, the log swithes to what ever gear im in. BUT while the clutch is in or im coasting in neutral, it says im in 6th but i doubt it effects anything. all i use it for is boost per gear tables to pull some wgdc out of 4th and 5th gear
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Old 08-18-2017, 01:55 PM   #7
JarHarms
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Member#: 138994
Join Date: Jan 2007
Chapter/Region: MWSOC
Location: DeKalb-ish, IL
Vehicle:
06 WRX Ltd
02 Forester S

Default

Mine behaves exactly as you described as well. Thanks for the earlier input.
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