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Old 01-01-2021, 04:48 PM   #1
jordanc15
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Default Anybody know fuel injector scaling for 2005 Legacy GT?

Does anybody know what the factory injector scale for a 2005 Legacy GT is? It has sidefeed yellow top injectors and I'm using Cobbs access tuner software.

Im running an EJ25 that I pulled out of an 05 Legacy GT to put in my VW bug. The wiring harness and ECU is form an 07 WRX so Cobb will only grant me access to their 07 WRX map through the access tuner software but I would imagine the top feeds that came in an 07 WRX have a different injector scale. Just don't want to chase my tail with tuning issues, or id like to at least make sure they are the same so I can write that off if I have any issues.

The stock 2007 WRX CCF map value is 4916

Any help appreciated!
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Last edited by jordanc15; 01-01-2021 at 04:55 PM.
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Old 01-02-2021, 12:49 PM   #2
kopele
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I checked some of the 05 LGT stock ROMs here and they were all 5200.
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Old 01-03-2021, 03:35 PM   #3
jordanc15
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Quote:
Originally Posted by kopele View Post
I checked some of the 05 LGT stock ROMs here and they were all 5200.
Very helpful, thank you! I looked through those files but im only given the injector scale in cc/min. Did you calculate 5200 based off that data? Just curious so I know going forward
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Old 01-05-2021, 02:43 PM   #4
kharmicresonance
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I just glanced at this and immediate ??? went through my head.

Those sidefeeds should be the same as the STI and FXT 2004-2005.

That scaling is actually 520.59 and that does not do you a lot of good without the latencies:

6.00 4.96
9.00 1.78
11.50 1.01
14.00 0.68
16.00 0.54
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Old 01-05-2021, 03:10 PM   #5
jordanc15
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Quote:
Originally Posted by kharmicresonance View Post
I just glanced at this and immediate ??? went through my head.

Those sidefeeds should be the same as the STI and FXT 2004-2005.

That scaling is actually 520.59 and that does not do you a lot of good without the latencies:

6.00 4.96
9.00 1.78
11.50 1.01
14.00 0.68
16.00 0.54
Im using Cobb accesstuner for my tuning and they use a different metric for injector scale vs romraider. I was curious how the person above you was able to pul the figure they provided, but haven't heard back from them.

If the car was more normal id just run the MAF to scale the injectors and then switch to speed density. Unfortunately I'm not able to run the factory MAF at this point so I figured I would be able to find someone with an 05 LGT and accesstuner who could give me the scale value
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Old 01-05-2021, 03:14 PM   #6
kharmicresonance
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ok then, I am still confused (?) RR is in cc/min iirc. And, you stated you needed cc/min (?)

> nvm, I figured out how I misread your statement.

Last edited by kharmicresonance; 01-05-2021 at 03:22 PM. Reason: clarification
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Old 01-05-2021, 03:37 PM   #7
jordanc15
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Quote:
Originally Posted by kharmicresonance View Post
ok then, I am still confused (?) RR is in cc/min iirc. And, you stated you needed cc/min (?)
Im sure this is confusing so let me try to clarify. Cobb Accesstuner defines "Fuel Injector Scale" as IPW for Stoich Fueling per Gram of Load (microseconds) and provides the value '4916' for a stock 2007 WRX map.

Cobb will only grant me access to this map since my ECU is from an 07 WRX. My engine having come out of an 05 LGT came with those yellow sidefeeds. I just need the Cobb Accesstuner value since they seems to use a different system than other tuning software

My "Fuel Injector Latency" table comes loaded with the following values:
6.50 - 3.01
9.00 - 1.69
11.50 - 1.10
14.00 - 0.77
16.50 - 0.63
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Old 01-05-2021, 08:26 PM   #8
kopele
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Quote:
Originally Posted by jordanc15 View Post
Very helpful, thank you! I looked through those files but im only given the injector scale in cc/min. Did you calculate 5200 based off that data? Just curious so I know going forward
RR has a dropdown on the top menu bar that you can change from "Default" to "Raw Value" after you've opened a table. That will show you the Cobb value, the formula is buried somewhere on RR forums.
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Old 01-06-2021, 11:57 AM   #9
shadowsports
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Might I suggest that you poke around the LegacyGT.com forums. There might be additional resources there.
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