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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.

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Old 03-23-2019, 08:38 AM   #15
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Love that 90* merge angle...
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Old 03-24-2019, 01:54 AM   #16
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Old 03-24-2019, 02:05 AM   #17
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If I'm reading the dyno results right, without a tune, it makes the dip larger, and moves it up in the rev range, while barely bumping the top end? While more power is something everyone loves, I don't like what it does with the dip.

Here's to hoping with-tune has a better dyno result
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Old 03-24-2019, 05:01 PM   #18
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If I'm reading the dyno results right, without a tune, it makes the dip larger, and moves it up in the rev range, while barely bumping the top end? While more power is something everyone loves, I don't like what it does with the dip.

Here's to hoping with-tune has a better dyno result
I could tune to stock and Dyno vs a stage two pull. I'd like to see it anyway. Curious about the tq curve and power passed 7k .
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Old 03-24-2019, 05:03 PM   #19
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Love that 90* merge angle...
I don't remember seeing it like that, but I'mma take my skid pan off and look at it now lol. I'm promise it's more power, but probably from being catless.
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Old 03-24-2019, 05:42 PM   #20
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did you notice any difference in exhaust note compared to the header you had before?
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Old 03-24-2019, 08:13 PM   #21
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I would imagine the stage 2 tune would work well with the header. Imo the manufacturers dyno looks like most untuned header graphs.
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Old 03-24-2019, 09:42 PM   #22
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did you notice any difference in exhaust note compared to the header you had before?
(I was stock) Oh, yes! Much louder and angrier. Not raspy. Doesn't hardly pop or burble . But less mellow. Tunnels are crazy, it sounds like a racecar to me with the windows down.
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Old 03-25-2019, 12:54 AM   #23
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(I was stock) Oh, yes! Much louder and angrier. Not raspy. Doesn't hardly pop or burble . But less mellow. Tunnels are crazy, it sounds like a racecar to me with the windows down.
what exhaust/midpipe are you using?
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Old 03-25-2019, 05:43 AM   #24
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Give us a exhaust note vid lol i might get one just cuz i got an oft and my shits been miss firing hella so hopefully the tune fixes it but if it blows up i won't regret the headers lol
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Old 03-25-2019, 07:20 AM   #25
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Am I wrong? This header has smaller pipe id than oem.

From looking at it, and the "dyno", which just looks plain weird, I believe a cated oem pipe runs up better, and a punched out cat in a oem header is way better, even before a tune.

From the pipe diameter I would say that it should be more responsive down low, but be well restricted in the higher RPM's.

It's been a while since I've done calcs IRT header design, but, going by rule of thumb this this doesn't look good.

Have I said the plot looks "off".

38mm primaries = these things
45mm primaries = pre 17
48.6 primaries = post 17

Going backwards really.
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Old 03-25-2019, 07:55 AM   #26
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Old 03-25-2019, 08:06 AM   #27
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For $89 Id go with this one which looks like an HKS knockoff and has 2.25 outlet

https://www.amazon.com/dp/B07FP2LT9T..._t2_B0719SLBRF
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Old 03-25-2019, 08:17 AM   #28
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I feel that there's a Futurama meme befitting here, but I can't find one....



Infant Bender?




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