09-01-2021, 08:07 PM | #43 |
Senior Member
Join Date: Oct 2012
Drives: WR Blue Pearl 2022 Subaru BRZ
Location: Melbourne
Posts: 818
Thanks: 790
Thanked 517 Times in 274 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
I haver noticed that they use a different head unit part in the JDM models (and I kind of prefer it tbh as its makes the car seem that little bit more premium inside), but I haven't seen anywhere that its an optional.
|
09-01-2021, 08:14 PM | #44 |
Senior Member
Join Date: Oct 2012
Drives: WR Blue Pearl 2022 Subaru BRZ
Location: Melbourne
Posts: 818
Thanks: 790
Thanked 517 Times in 274 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
|
09-02-2021, 12:43 AM | #45 | |
Senior Member
Join Date: Mar 2017
Drives: JRSC BRZ SOLD
Location: Ohio
Posts: 934
Thanks: 676
Thanked 739 Times in 396 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
Quote:
This dip has been a point of contention for 8 years now and it apparently still exsits. No data log has ever shows ping from running lean at WOT as the cause.. |
|
09-02-2021, 12:50 AM | #46 |
Senior Member
Join Date: Sep 2018
Drives: Halo 86, '19
Location: NY
Posts: 120
Thanks: 88
Thanked 95 Times in 48 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
The only thing this suggests to me is that the torque dip has always been an overblown issue as a result of people fixating on it via dynos considering literally no reviewer mentioned it in the early reviews based on feel alone.
I'm also 99% sure it has everything to do with emissions and catalytic warmup processes. An early article discussed the FA20 moving back the CC back a some CM or so compared to the Impreza FB20 while maintaining faster warmups. This, coincided with the fact that the Ace 350 sees the largest peak gains in the middle of the torque curve because of its long, catless runner length suggests to me that there's nothing that can be done about it OEM wise without massively compromising emissions and critical warmup emissions. But I'm sure it's barely an issue anyways. I don't have an issue stock on the 2 liter, it's going to be even less of an issue on the 2.4 liter. As said by numerous people here before, the torque dip is either barely more than a brief passing moment in a low gear, or you're otherwise lugging the car in too tall of a gear where you should be downshifting to begin with. |
The Following User Says Thank You to OwlDance For This Useful Post: | Dzmitry (09-02-2021) |
09-02-2021, 12:53 AM | #47 |
Member
Join Date: Aug 2021
Drives: honda element
Location: tampa
Posts: 35
Thanks: 0
Thanked 13 Times in 12 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
well im not as book learnt as other people with their fancy equations and maths to understand why a car can have torques and then have that fall off and then make torques again.
|
09-02-2021, 08:56 AM | #48 |
Senior Member
Join Date: Mar 2012
Drives: VW GLI 6MT
Location: New Jersey
Posts: 110
Thanks: 61
Thanked 88 Times in 41 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Only a test drive will confirm our speculations. But to add to our speculation, I threw together a very quick spreadsheet to show speed in gears and different shift points. In my current 2.0T-6MT car, for normal daily driving I use 2,500 rpm shift points with no problems. And that’s pretty much off boost.
If we use a 3,500 rpm shift point (or less) it appears we will enter the next gear in the low to mid 2,000 rpm range, right in the “pre-dip” sweet spot. That might prove fine for daily driving. If we are concerned about avoiding the dip when driving faster, it seems we’ll need to use a 6,000 rpm shift point, except for first gear. To enter second gear above 4,500 rpm we need at 7,500 rpm shift point from 1st gear. This may not be a major issue. Even if we do spend time near the 4,200 rpm dip, if it still has a fair amount of torque, it may not be irritating. |
The Following 2 Users Say Thank You to Baldeagle For This Useful Post: | Ohio Enthusiast (09-02-2021), Stonehorsw (09-02-2021) |
09-02-2021, 09:44 AM | #49 |
Senior Member
Join Date: Apr 2019
Drives: 2013 BRZ Satin White Pearl
Location: Melbourne, Australia
Posts: 633
Thanks: 582
Thanked 673 Times in 330 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
|
The Following User Says Thank You to Dirty Harry For This Useful Post: | slimfit (09-02-2021) |
09-02-2021, 10:47 AM | #50 |
Member
Join Date: Oct 2009
Drives: ‘22 BRZ
Location: Delco, PA
Posts: 84
Thanks: 127
Thanked 47 Times in 25 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
I’d sell organs to own a GR Yaris, but it’ll never come to the states in that form. A bloated Corolla with a 3 cylinder is DOA.
|
The Following User Says Thank You to slimfit For This Useful Post: | Dirty Harry (09-08-2021) |
09-02-2021, 11:31 AM | #51 | |
Senior Member
Join Date: Aug 2020
Drives: 2022 MT Neptune GR86 Prem.
Location: Cincinnati, OHIO
Posts: 492
Thanks: 143
Thanked 315 Times in 199 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
I know what the numbers are (at least claimed) already for the 2022. I know that they are probably pretty similar to what I have on my 2020 with two/three simple mods (OFT Tune/e85/catless header). I know that I like what I have but would like a little more. I know that I am likely to get a 2022 at some point. I don't have any issues with spending the relatively small amount of money/time doing these same three things to the 2022 and I don't care if someone says its possibly illegal and/or voids the warranty. THEREFORE: I am happy to see that it APPEARS as if the engineers at Toyaburu ran into some of the same issues they ran into with the FA20 and had to make compromises in order to meet emissions/MPG issues and therefore did not ring every ounce of available power out in their factory tune and that gains similar to those available on the FA20 per above will likely be available on the 2022. I respect the fact that you may not want to do tune/header/e85 and that's fine. But I am more than willing to do it. |
|
09-02-2021, 11:35 AM | #52 |
Senior Member
Join Date: Aug 2020
Drives: 2022 MT Neptune GR86 Prem.
Location: Cincinnati, OHIO
Posts: 492
Thanks: 143
Thanked 315 Times in 199 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
You really can't be serious. Stock my 2020 felt like I was hitting a wall when I ran into the torque dip. I mean, I could literally feel myself moving forward in my seat. I personally don't see how anybody could drive it that way for very long...
|
The Following 2 Users Say Thank You to CincyJohn For This Useful Post: | DriveDriftDogfight86 (10-03-2021), FlyingJett (09-02-2021) |
09-02-2021, 11:51 AM | #53 | |
Senior Member
Join Date: Aug 2014
Drives: '23 BRZ Limited
Location: OKC, OK
Posts: 1,986
Thanks: 660
Thanked 1,230 Times in 703 Posts
Mentioned: 9 Post(s)
Tagged: 1 Thread(s)
|
Quote:
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. |
|
09-02-2021, 12:02 PM | #54 | |
Senior Member
Join Date: Jul 2019
Drives: 2018 Subaru BRZ Limited with PP
Location: Phildalphia, Pennsylvania
Posts: 975
Thanks: 2,123
Thanked 609 Times in 391 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
Quote:
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. One thing that actually destroyed this feeling was putting in a header and tune. It was certainly quicker I recall, but the acceleration never felt like it did during that torque increase out of the dip. Instead it's just a gradual increase through the powerband. Anyways, all that is just feels. It's obviously not ideal, in any case, to have the dip. But as I said earlier, I'm really not worried about the torque dip in the new gen as the whole torque curve is a good bit higher now, to the point that the lowest point of the dip is around the highest point of gen1's torque peak. |
|
09-02-2021, 12:10 PM | #55 |
Senior Member
Join Date: Mar 2013
Drives: '22 WRB
Location: US
Posts: 854
Thanks: 201
Thanked 1,213 Times in 400 Posts
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
|
Actual image of CincyJohn hitting the torque dip while gently accelerating.
|
The Following 5 Users Say Thank You to trippinbillies40 For This Useful Post: | BigTuna (09-02-2021), CincyJohn (09-02-2021), DriveDriftDogfight86 (10-03-2021), Dzmitry (09-02-2021), OwlDance (09-02-2021) |
09-02-2021, 12:15 PM | #56 |
Senior Member
Join Date: Apr 2012
Drives: 22 BRZ (Previously 13 FR-S)
Location: USA
Posts: 5,794
Thanks: 2,164
Thanked 4,242 Times in 2,220 Posts
Mentioned: 48 Post(s)
Tagged: 2 Thread(s)
|
My friend with an ap2 s2000 and I joke that it’s Subaru’s VTEC lol.
__________________
"Never run out of real estate, traction, and ideas at the same time."
2022 BRZ Build 2013 FR-S Build |
The Following 2 Users Say Thank You to DarkSunrise For This Useful Post: | Dzmitry (09-02-2021), FlyingJett (09-02-2021) |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Typical Mustang Dyno Numbers? | Rockz222 | Engine, Exhaust, Transmission | 6 | 07-11-2015 08:33 PM |
Dyno numbers | ogrowup | Engine, Exhaust, Transmission | 7 | 12-27-2014 08:04 AM |
Average Stock Dyno Numbers? | KONVERTER | Engine, Exhaust, Transmission | 23 | 10-12-2013 10:13 PM |
Dyno numbers list from Evasive Motorsports Meet/Dyno | Fish | Southern California | 29 | 02-24-2013 03:16 AM |
dyno numbers seem low | stealth_fighter | Scion FR-S / Toyota 86 GT86 General Forum | 9 | 02-02-2013 09:01 PM |