Off road x pipe with angled o2 extenders - Mustang Evolution

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Old 07-13-2014, 09:47 AM   #1
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Off road x pipe with angled o2 extenders

I am looking into bbk shorty headers and a catless x pipe set up. I am curious if I could install o2 extenders and not get a check engine light as well as still have top performnace from my car without negative side effects. I currently run the STEEDA 93 tune and have the STEEDA instake. I just don't really see why a tune is needed beyond turning off or reprogramming the o2 sensors. Extenders serve the dame purpose, unless they don't work on the 3.7

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Old 07-13-2014, 04:43 PM   #2
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Anybody used this setup without a tune?

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Old 07-13-2014, 05:53 PM   #3
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I had the chrome BBK shorties with their o/r x-pipe and had to daily it for about a week because I was waiting for a tune. CEL turned on about 25 or so miles in but my air/fuel ratio was exactly how it was with the stock exhaust. Put about 500 miles before I got the tune uploaded.
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Old 07-13-2014, 08:05 PM   #4
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Did you use 02 90 degree extenders or straight o2 bolted into the pipe? The extenders are ment to prevent the check engine light without having to tune a bypass signal. That's a great sign that your air fuel was the same. That is an indication that the tune is more for the engine light and not so much for tuning the gains. What power hp/tq did you get from the set up? I am trying to decide between shorty or long tube but I want to get more tq since torque is what gets you going off the line quicker

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Old 07-13-2014, 11:00 PM   #5
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I bolted the sensors without the extenders. Well the tune could be for gains too because it could then allow the engine to take advantage of the new freely flowing exhaust. I did feel an increase in power both when I installed the headers/x-pipe and when I uploaded a tune. I went with shorties just because of the sound. Long tubes will give you slightly better gains but they're too raspy from what I had read and heard. I'm not sure exactly how much power I'm putting down because I haven't gotten it on the dyno but from what other people have gotten, I should be at 300 hp and around 285 torque to the wheels. I have the stock 2.73 gears so I'm not moving off the line anytime soon lol
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Old 07-13-2014, 11:03 PM   #6
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Nice. I have the 3.31 performance package. I have heard that we gain more torque with shorties and lose it with long tubes. The difference is probably miniscule. were u tuned before the headers were added?

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Old 07-13-2014, 11:40 PM   #7
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Nope, just had a muffler delete. Did headers and x-pipe together, then intake, and lastly tune. Haven't done anything else performance wise
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Old 07-13-2014, 11:42 PM   #8
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I wonder what would happen since I already have a tune. Guess I will have to find out

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