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Old 07-09-2012, 03:12 PM   #1
DerekDaniel
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Default Stage 1 already getting catback do i need reflash?

Hello I already flashed my 08 legacy GT stage one. I am getting a magnaflow catback exhaust put on in a few days. Do I have to reset my ecu ie disconnect battery cable? or do I need to reflash the stage one map? or do I have to do nothing? once installed?
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Old 07-09-2012, 03:59 PM   #2
Cobb Tuning
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Originally Posted by DerekDaniel View Post
Hello I already flashed my 08 legacy GT stage one. I am getting a magnaflow catback exhaust put on in a few days. Do I have to reset my ecu ie disconnect battery cable? or do I need to reflash the stage one map? or do I have to do nothing? once installed?
Catbacks are within the realm of acceptable mods for stage 1, so you are fine with that map. It may be good practice to reset the ECU in general when adding another aftermarket part, but for a catback, it really isn't necessary. It may impact boost response somewhat, but there is no boost learning as far as the ECU is concerned so not a big deal.

Bill
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Old 07-10-2012, 11:47 AM   #3
Trudd84
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Bill, Is a catback setup on a stage one going to produce any power other than sound power? I realize you can't say 100% but are there gains from going to a higher flowing catback? Are there other things that can be done to increase horsepower on a stage 1 map on a stock car?
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Old 07-10-2012, 12:04 PM   #4
Black94Snake
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Originally Posted by Trudd84
Bill, Is a catback setup on a stage one going to produce any power other than sound power?
Not really
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Old 07-10-2012, 04:04 PM   #5
Cobb Tuning
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Bill, Is a catback setup on a stage one going to produce any power other than sound power? I realize you can't say 100% but are there gains from going to a higher flowing catback? Are there other things that can be done to increase horsepower on a stage 1 map on a stock car?
Generally, you aren't going to see very notable gains from just a catback on an otherwise stock car running a stage 1 map. Your best bang-for-the-buck would be to go stage 2. Even just an aftermarket downpipe with the stock catback would see notable gains (although a full turbo-back exhaust would be ideal).

Bill
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Old 07-11-2012, 05:47 PM   #6
Trudd84
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Thanks. But I have to say, my car runs waaaaay better on stage I than stock! But yes, I am most certainly waiting to be able to purchase a decent downpipe. What size is the stock exhaust cat back where it meat with a down pipe?
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Old 07-12-2012, 09:05 AM   #7
Cobb Tuning
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Thanks. But I have to say, my car runs waaaaay better on stage I than stock! But yes, I am most certainly waiting to be able to purchase a decent downpipe. What size is the stock exhaust cat back where it meat with a down pipe?
Stage 1 tune is definitely noticeable - I meant that just a catback when you already have a stage 1 tune (or with stock tune) is not going to see notable gains. Stock size is 2.5".

Bill
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Old 07-14-2012, 01:04 AM   #8
DerekDaniel
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Yeah I am gonna stay away from stage two having an automatic I cant control the RPMS and want to have my car for at least 5 more years. Hell at stage 1 which is definitely better than stock. Downside: now I have to monitor the car and make sure all the parameters are good, but they are not. they are borderline high even with ACN map; and that's at stage one. So if I go stage to stage two what are my A/F and knock look like lol

I already reset it and took a bunch of logs posted over in the access port section legacy. I am hoping that everything stabilizes or imma have to get a protune or E-tune becaues the OTS is giving me some anxiety.

Last edited by DerekDaniel; 07-14-2012 at 01:07 AM. Reason: add info
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Old 07-14-2012, 08:59 AM   #9
Cobb Tuning
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Yeah I am gonna stay away from stage two having an automatic I cant control the RPMS and want to have my car for at least 5 more years. Hell at stage 1 which is definitely better than stock. Downside: now I have to monitor the car and make sure all the parameters are good, but they are not. they are borderline high even with ACN map; and that's at stage one. So if I go stage to stage two what are my A/F and knock look like lol

I already reset it and took a bunch of logs posted over in the access port section legacy. I am hoping that everything stabilizes or imma have to get a protune or E-tune becaues the OTS is giving me some anxiety.
Extreme fuel trims are not caused by an OTS map. They are a mechanical issue with the car. The only way a map could cause bad fuel trims would be if you were using an intake or injectors that were not compatible with the map's tune.

Bill
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Old 07-14-2012, 09:32 AM   #10
DerekDaniel
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[quote=Cobb Tuning;37590073]Extreme fuel trims are not caused by an OTS map. They are a mechanical issue with the car. The only way a map could cause bad fuel trims would be if you were using an intake or injectors that were not compatible with the map's tune.

Bill[/QUOTE

Yeah I can agree on that to a degree maybe imma need a new maf
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