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


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Old 11-10-2020, 12:01 PM   #43
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@Spuds and @Tcoat, both correct; they need to change up a few variables if they are to provide a better engine for the 2nd gen.

I guess we can only wait until after the 18Nov date, hoping they don't disappoint. Then again, I plan on keeping my 2014 for a bit longer past 200k miles, if 2020 allows it.
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Old 11-10-2020, 05:50 PM   #44
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The turbo heads dont flow very well. Fa20 heads may flow a little too good for 2 liter n.a. so they might be just right for a 2.4
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Old 11-10-2020, 08:41 PM   #45
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The turbo heads dont flow very well. Fa20 heads may flow a little too good for 2 liter n.a. so they might be just right for a 2.4
I'd say the current heads flow about the right amount for a 2.0 limited to 7400 rpm! Wouldn't surprise me if current heads on 2.4 liter made 217 hp at lower revs than current max-power rpm, with a broader powerband. Hopefully still revs to 7400 and still makes decently ok power up there...
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Old 11-11-2020, 04:43 AM   #46
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It remains to be seen if the 2.4L responds well to mods, eg, Headers and Tune, for those staying N/A i mean.
A rev limit up to 7500 wouldn't be bad at all.

We can only wait for the time being till the launch.

I would like to see if they do address a few other things, like the steering wheel being slightly off centre and telescoping more towards the driver ( us long legged mammals have issues)
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Old 11-11-2020, 08:46 AM   #47
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It remains to be seen if it actually gets a 2.4 liter. It would make sense but we dont really know yet.
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Old 11-11-2020, 09:29 AM   #48
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here's another one is a mid engine corvette still a corvette?
1959 called, they said "it's always been a corvette"

https://www.motor1.com/features/3603...gine-corvette/
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Old 11-11-2020, 09:31 AM   #49
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It remains to be seen if the 2.4L responds well to mods, eg, Headers and Tune, for those staying N/A i mean.
A rev limit up to 7500 wouldn't be bad at all.

We can only wait for the time being till the launch.

I would like to see if they do address a few other things, like the steering wheel being slightly off centre and telescoping more towards the driver ( us long legged mammals have issues)
I'd like to see an even deeper torque dip in the new 86. Big promised peak numbers, with a cavernous torque dip, staying true to the original design.
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Old 11-11-2020, 10:40 AM   #50
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Given how aftermarket headers so effectively remove the 2.0ís mid-rpm torque dip and simultaneously increase high-rpm torque, I am curious to learn how Subaru designed the next genís N/A 2.4, assuming the media is correct that the 2022 gets a 2.4.
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Old 11-11-2020, 10:44 AM   #51
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Given how aftermarket headers so effectively remove the 2.0ís mid-rpm torque dip and simultaneously increase high-rpm torque, I am curious to learn how Subaru designed the next genís N/A 2.4, assuming the media is correct that the 2022 gets a 2.4.
The aftermarket headers do almost nothing. It is the tune that people use with them that make the difference. The car already comes with a good header.
The car from the factory comes tuned for mileage and emissions. It has to they have no choice. That isn't going to change all of a sudden.
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Old 11-11-2020, 10:48 AM   #52
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The aftermarket headers do almost nothing. It is the tune that people use with them that make the difference. The car already comes with a good header.
Isn't removing the cats also an improvement that aftermarket headers have? I remember reading about people de-catting the stock header and having the same gains. Are you saying that a tune on a stock catted header will give the same results as a tune for an aftermarket/stock de-catted header?
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Old 11-11-2020, 10:57 AM   #53
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Isn't removing the cats also an improvement that aftermarket headers have? I remember reading about people de-catting the stock header and having the same gains. Are you saying that a tune on a stock catted header will give the same results as a tune for an aftermarket/stock de-catted header?
Decatting will indeed give you more. Not piles more but more. Will also make you stink and possibly sound like crap.

I was more addressing the expectation that a redesigned stock header would suddenly eliminate the dip and add power.
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Old 11-11-2020, 11:00 AM   #54
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Isn't removing the cats also an improvement that aftermarket headers have? I remember reading about people de-catting the stock header and having the same gains. Are you saying that a tune on a stock catted header will give the same results as a tune for an aftermarket/stock de-catted header?
Yes. Catalytic converters significantly increase the surface area the flow is in contact with, increasing frictional resistance. The stock one is also right after the collectors, reducing any scavenging effect that could occur.

In order to take advantage of aftermarket headers, the exhaust ports need to be tuned to that specific model of header. Doing this correctly takes advantage of pressure pulses to help pull exhaust out of each cylinder. This is more efficient than just each cylinder pushing the exhaust out.
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Old 11-11-2020, 11:16 AM   #55
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The aftermarket headers do almost nothing. It is the tune that people use with them that make the difference. The car already comes with a good header.
The car from the factory comes tuned for mileage and emissions. It has to they have no choice. That isn't going to change all of a sudden.


This manufacturer offers a catted header. No tune. At 1:04 into the video it shows their dyno. Looks like a big improvement to me. But are you saying that even though this header has a catalytic converter, it will still not meet emission standards? Whatever design characteristics this manufacturer uses cannot be used by Subaru? I know this is purely academic, but still good to understand. Thanks.
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Old 11-11-2020, 12:21 PM   #56
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The car is a compromise through and through. Getting decent power while complying with regulations is difficult hence the push towards evs. Having said that, a long tube header seems to really help but along with it comes fitment issues, cost and basic illegality. If I want real acceleration there are better choices available. The 86 is a cheap sports car, not a Cayman
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