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BRZ Second-Gen (2022+) -- General Topics General topics for the second-gen BRZ


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Old 07-09-2022, 10:35 AM   #1
Ogt
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Charcoal intake filter removal testing & RESULTS



If anyone wanted to see some actual data of what that extra EPA pad does or rather restricts. I know Engineering Explained did a video on his Crosstrek years ago but neat to see what it does specifically with the new FA24. I anticipated a larger % gain with the BRZ compared to the Crosstrek but it comes out pretty much the same, around a 4% gain peak from stock to removed.
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Old 07-09-2022, 03:16 PM   #2
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facts. nice


Another Maynard fan here.
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Old 07-11-2022, 09:28 AM   #3
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Makes sense. Japanese vehicles comes without charcoal filter and is rated at 232hp.
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Old 07-11-2022, 10:26 AM   #4
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Makes sense. Japanese vehicles comes without charcoal filter and is rated at 232hp.
Yup. My jdm gr86 didnt come with the charcoal filter. Not sure the part number of this jdm version but it wun be long before this part number surfaces. And my car (RC version) doesnt have Active Sound yet i do hear a little bit of intake growl.
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Old 07-11-2022, 10:33 AM   #5
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Yup. My jdm gr86 didnt come with the charcoal filter. Not sure the part number of this jdm version but it wun be long before this part number surfaces. And my car (RC version) doesnt have Active Sound yet i do hear a little bit of intake growl.
The part number is probably printed or molded somewhere on the part isn't it?
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Old 07-11-2022, 03:09 PM   #6
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The part number is probably printed or molded somewhere on the part isn't it?
Hope not, or it would create some confusion, as the molded part probably is the same for versions with and without charcoal.
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Old 07-11-2022, 03:19 PM   #7
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Hope not, or it would create some confusion, as the molded part probably is the same for versions with and without charcoal.
Don't know unless you look, right?
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Old 07-11-2022, 03:59 PM   #8
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Don't know unless you look, right?
Yes
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Old 07-12-2022, 05:13 AM   #9
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I think I'd pay for the JDM box, that way I'd have the unmolested stock USDM box in case I became inclined to swap it back in.

I had no idea the JDM car was rated for more horsepower. I wonder if there are other mechanical differences. I'm sure the tuning is different because of Japan's higher octane fuel.
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Old 07-12-2022, 05:27 AM   #10
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Same here, no charcoal filter in au.

Potentially the difference in the official engine ratings?
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Old 07-12-2022, 08:30 AM   #11
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Guy didn't tested in 5th gear (1:1 ratio), wouldn't that invalidate his results?
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Old 07-12-2022, 09:08 AM   #12
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Guy didn't tested in 5th gear (1:1 ratio), wouldn't that invalidate his results?
No.
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Old 07-12-2022, 11:46 AM   #13
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Even if the dyno didn’t take into account the gear ratios, you’re still getting a gain from baseline run.

And as for mike2100’s comment, I know us and eu octanes are the same just displayed differently. I would assume it’s the same and it’s more tuned for less emission restrictions vs a higher octane. (This could be very wrong)
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Old 07-12-2022, 01:53 PM   #14
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I'm not watching a 14 minute video.

Was there a tune added? Or is the claim removing this part adds this amount of HP. It seems a little hard to believe.
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