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-   BRZ Second-Gen (2022+) -- General Topics (https://www.ft86club.com/forums/forumdisplay.php?f=98)
-   -   Dyno Numbers (https://www.ft86club.com/forums/showthread.php?t=146701)

stilesg57 09-02-2021 02:43 PM

There’s so much excusing in this thread. Here’s the only polishing I can do on this turd of a development:

Location of the dip and gearing matter A LOT. I don’t much care what this kind of engine is doing below 4k because I would never drive it there when I want power. Bottom half of the tach is for steady-state cruising IMO. The problem with the old car wasn’t just that there WAS a dip on an already underpowered motor, it’s that there was too broad of a band just below redline where an upshift would drop you right into it.

The fact that the new one has a dip sucks, and I’m not going to excuse it just because I like the rest of the package (at least in theory). But it does look like the dip is at least earlier in the rev range. As a thought experiment: if the new dip it 3x as deep but it’s from 2.5k-4k I’d be annoyed but ok with it…as long as a shift around the 6.5k range doesn’t drop me right into the valley of it. It looks like maybe that’s addressed, which is a decent balm on this burn.

OwlDance 09-02-2021 02:48 PM

Quote:

Originally Posted by OkieSnuffBox (Post 3462400)
That's because they are almost always on a track.

On the street, in say third gear needing to accelerate, you could always feel it fall flat on it face for a few then pick back up noticeably.

Well maybe it's just the way I drive (maybe I'm just a luddite) but I always lean into my accelerator and I don't floor it until I'm somewhat into the RPMs (4k min +) to preserve the engine/prevent torque shock or w/e, so the dip to me feels like I'm asking for more power gradually before it suddenly spikes past 5kRPM.

The powerband still continues to rise in the dip so you're still getting more power regardless of torque dip. To actually feel the rise to 3k then drop to 4k it's kind of like lugging the car a bit IMHO, where it'd just be easier on most of the components to lean in or downshift.

I'd argue on the track where if one were on the track demanding full power down as much as possible, you'd notice it more as you demand a bunch from 4k but not get that demanded power (I guarantee most reviewers aren't always keeping the car at the highest RPMs constantly). On the daily road, I've literally never had a problem with the torque dip, considering my last car had less HP and was heavier. But that's just me. I still think it's a very overblown issue that people only find as a problem because of number theory/oggling dynos over real world stuff. Yes, the dip can be annoying depending on how you drive but it's far from making the car "gutless" IMHO. IIRC our dip isn't any worse than what the S2000 makes until VTEC kicks in lol.

CincyJohn 09-02-2021 03:18 PM

Quote:

Originally Posted by trippinbillies40 (Post 3462405)
Actual image of CincyJohn hitting the torque dip while gently accelerating.

https://www.liveabout.com/thmb/Jg9Rg...00103e637b.jpg

:clap::clap::clap: Pretty sure that actually happened to me once.

CincyJohn 09-02-2021 03:23 PM

Quote:

Originally Posted by Dzmitry (Post 3462402)
The one neat thing with the dip, I always thought, was the acceleration you would feel right as the torque starts to rise again, because at this point the power began to rise much quicker than at any other point in the powerband.

I said it myself, it was like getting all of the negatives of a turbo spool with none of the advantages. Specifically, on at least the last two cars I have owned, both V6 biturbos (2001 S4, 2008 335i coupe), you would be accelerating and then the turbos would spool and whooshh... you were really off.

On this car stock, you accelerate fine to start and then you go WTF!!! for a few seconds and then ho, hum you are back to where you should have been to begin with.

And for the record, I have never driven it on a track and have no plans to. However, I do like to accelerate quickly when called for (and even when not, but safe) and toss it around (same). I have gradually taught myself to shift later than I used to because even on OFT/headers/e85 it still needs to be running in the +4k range to really feel like you are getting the most out of the motor. Not gonna lie, though, sometimes I am cruising at 65 on the highway in 6th and forget to downshift to pass and I pay for it whereas my last two cars would just go .5 second of spooling and off!

Not complaining - I purchased this car with my eyes open and I love lots of things about it - and I still may go FI at some point in time (or just upgrade to a 2022+ instead if header/tune/e85 get me where I need/want to go).

OkieSnuffBox 09-02-2021 03:36 PM

Quote:

Originally Posted by OwlDance (Post 3462447)

I'd argue on the track where if one were on the track demanding full power down as much as possible,

No, because you don't let the revs drop that low.

FlyingJett 09-02-2021 04:18 PM

Quote:

Originally Posted by Blighty (Post 3462235)
If you want AWD then for sure!, although it might be worth waiting for the new WRX and STI to compare.

But do you really want AWD?

I just don't want to port a head, install headers and midpipe, find a proper tuner that can tune your car over internet and so on again :D
Actually, I have driven GR Yaris (it is available in our country) - it felt very good. As my tuned Scion FRS but more powerful in a midrange :w00t::burnrubber:
But the driving position is awfull (for me).

You have this f*cking multimedia system in center of panel and mirror.

And it felt like you are sitting on top of wheels in some horse cart :D

Maybe I will wait 2-3 years for some used gr86/brz and spend money on tuning.

OwlDance 09-02-2021 04:31 PM

Quote:

Originally Posted by OkieSnuffBox (Post 3462475)
No, because you don't let the revs drop that low.


Well this is quickly devolving into internet shitposting, track driving and your statement doesn't exist in a vacuum in practice.

I've seen more than a dozen videos of people who'll drop well into the torque dip because it's faster to not downshift on certain technical areas of the track, not to mention that every driver is different. From the nordschleife to regular tracks. That's the last I'll say on this silly notion.

Lantanafrs2 09-02-2021 04:53 PM

I still think that graph is compressed and we're getting upset over nothing

slimfit 09-02-2021 05:16 PM

There’s a guy on NASIOC that made a better graph using HP/Torque from the graph on the YouTube video. It really didn’t look that bad. Here’s the link.

https://forums.nasioc.com/forums/sho...postcount=1043

Kona61 09-02-2021 05:24 PM

1 Attachment(s)
Quote:

Originally Posted by slimfit (Post 3462509)
There’s a guy on NASIOC that made a better graph using HP/Torque from the graph on the YouTube video. It really didn’t look that bad. Here’s the link.

https://forums.nasioc.com/forums/sho...postcount=1043

Here is a pic of it.

Also would like to point out that yet again, the graph doesn’t start at zero which makes the dip look bigger…

Pete 09-02-2021 05:33 PM

Quote:

Originally Posted by Kona61 (Post 3462513)
Here is a pic of it.

That doesn't look great, but it does look a little better than the 1st gen car. It looks like there is a little bump at the first half of the 1st gen torque tip instead of cratering right away.

I can't wait for headers and I don't even have the car yet.

Again I have to say that it doesn't look like the dash graph at all, but still not a deal breaker. I am currently planning to get a WRB BRZ limited manual.

ichitaka05 09-02-2021 06:08 PM

All Subie NA engine had tq dip (including EG & EZ), so I wasn't expecting anything different from FA24. When some journalist claiming tq dip was gone, I wanted to call BS... but didn't wanna say til I saw the dyno first.

For track-geeks who's revving only at the top won't feel much difference (other than lil more power). For autox'ers, they'll feel fraction less dip at the tq dip.

Either way, it'll be a good area aftermarket companies can tackle.

FlyingJett 09-02-2021 06:50 PM

Still the same dip from 3200 to 4500.

They advertised that peak is from 3700 .. But actually peak of torque is at 3000 and then it fall down :D

Wtf?

Lantanafrs2 09-02-2021 07:00 PM

Omg its horrible. I'll never buy one!


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