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10-19-2012, 02:06 PM | #1 |
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Exhaust a Big Deal for FBO
I'm currently FBO, minus midpipe and cat-back exhaust. Does this make a large performance increase? Looking for people that ran cobb stage 2+ with stock midpipe and exhaust then upgraded at a later date.
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10-19-2012, 04:04 PM | #3 |
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at the power levels youre runnning i could see 10 or so hp from catless mids, maybe like 1-2 from the axle back portion lol. swapping out n54 mids would be a good move, theyre utter garbage in every respect.
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10-19-2012, 05:14 PM | #4 | |
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I just dyno'd today 405hp and 479tq On monday I'm having my mid cats removed and some resonators welded in place There is a thread I created about it. I will post up my numbers after we fab it
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10-22-2012, 05:30 AM | #5 |
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10-23-2012, 08:18 PM | #7 |
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****UPDATE****
So yesterday we removed the secondary cats. I let it adapt for a day and went back to the dyno today. The results are....... 416HP 488TQ!!!!!!!!!!
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10-24-2012, 06:12 AM | #10 |
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Maybe...
Im actually pretty happy with it the way it is. It still sounds stock however, you can hear the turbo more. Also I still have my oem clutch and all this torque worries me.
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10-24-2012, 07:02 AM | #11 |
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there was a dicussion about this on n54tech and I think someone mentioned that the 135 axel back was more restrictive than people think it is and that gains can actually be seen from replacing it.
Those are some nice numbers, I pulled 440/520 on a dynojet and I have replaced all exhaust sections. If you want I can whip up a video and send it to you, I have AR cat-less DPs, berk mids and rogue axel back.
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10-24-2012, 07:05 AM | #12 | |
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10-24-2012, 07:09 AM | #13 |
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yup, when I get back stateside I'll be getting the HPF one.
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10-24-2012, 07:10 AM | #14 |
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Any slippage?
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10-24-2012, 07:17 AM | #15 |
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nope and I'm using the G5 ISO firmware with 70/30 93/E85 and that pulls really hard.
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