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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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05-12-2014, 04:15 PM | #15 |
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Do anyone dyno this exhaust yet?
Less concerned about gains and more interested in maintaining a good flow while losing weight. |
05-12-2014, 05:39 PM | #16 |
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i have a j2 dual tip. low end there is no difference in power. 5k rpm and up there is an increase in power, more so at the top end.
doesnt flow good? i believe it flows very well. its 2.75 with straight through mufflers. theres nothing choking the flow. if anything the quad tip would choke the flow what that big stock looking muffler. but.......... its loud as ****. it doesnt just add a little tone like others. if you dont like rasp or drone then this exhaust is not for you. it makes it sound like a race car. |
11-17-2015, 03:05 PM | #17 | |
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11-17-2015, 03:14 PM | #18 |
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I have a j2 dual exit catback. Sounds nice, wont fit up to the stock front pipe. I placed it with a AP front pipe and overpipe combo. Ended up going with a local deal so I got overpipe back exhaust for $400... cant complain!
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11-17-2015, 05:53 PM | #19 | |
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Exactly. You probably won't gain anything with a cat back. My local dyno shop put an intake, and cat back on an FRS and it gained ZERO horsepower (it may have gained 2 hp... they did 3 runs before and 3 runs after so if you looked at the lowest of the first 3 and the highest of the final 3 it gained 2.1 hp). After tuning the car with the intake and exhaust picked up just over 12whp over the lowest baseline. They also tuned another FRS on another day ...tune only with a drop in filter and gained just under 10whp (9.6).... so this kinda backs up the 0-2hp gain from a cat back.... |
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