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New Edge Cobras
99 cobra tune
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<blockquote data-quote="01yellercobra" data-source="post: 16152437" data-attributes="member: 35549"><p>When you install long tube headers the O2 sensors are moved further from the engine. This causes the sensors to take longer to heat up. So a tuner needs to lengthen the time for the sensors to heat up before the ECU thinks they're bad and throws a code. The tuner usually will increase the duty cycle for the sensor heaters as well. At least I did when I ran headers in my 01. The fuel trims might need some tweaking to bring them back to optimal due to the better flow of the headers.</p><p></p><p>The Xcal is the hand held device that transfers the tune from the computer to the car. The device used doesn't matter as much as the person writing the tunes. </p><p></p><p>The "93 tune" you see thrown around is a tune written for 93 octane. But generally if it's a tune that comes with a hand held (called a canned tune) it's so generic it's not worth running. What I mean by that is if you buy a tuner directly from SCT it'll have some generic tune on it. That's different than if you buy a tune from someone like Lund. They will send the tune on some kind of hand held device, but the tune is much better. You'll also see terms like "pump gas vs race gas". Which I'm sure you can figure out.</p></blockquote><p></p>
[QUOTE="01yellercobra, post: 16152437, member: 35549"] When you install long tube headers the O2 sensors are moved further from the engine. This causes the sensors to take longer to heat up. So a tuner needs to lengthen the time for the sensors to heat up before the ECU thinks they're bad and throws a code. The tuner usually will increase the duty cycle for the sensor heaters as well. At least I did when I ran headers in my 01. The fuel trims might need some tweaking to bring them back to optimal due to the better flow of the headers. The Xcal is the hand held device that transfers the tune from the computer to the car. The device used doesn't matter as much as the person writing the tunes. The "93 tune" you see thrown around is a tune written for 93 octane. But generally if it's a tune that comes with a hand held (called a canned tune) it's so generic it's not worth running. What I mean by that is if you buy a tuner directly from SCT it'll have some generic tune on it. That's different than if you buy a tune from someone like Lund. They will send the tune on some kind of hand held device, but the tune is much better. You'll also see terms like "pump gas vs race gas". Which I'm sure you can figure out. [/QUOTE]
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