|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
08-25-2018, 01:42 AM | #1 |
Senior Member
Join Date: Nov 2011
Drives: 2017 Subaru BRZ Limited
Location: socal
Posts: 562
Thanks: 72
Thanked 51 Times in 44 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
Full throttle for the first time
Per tuner’s request, I need to do data logging at full throttle in 2nd gear. Couple questions:
1. I originally thought full throttle was flooring the gas paddle, but I was told for 2017 AT models we have to press even more at the end of the paddle travel to activate full throttle. Can someone confirm this? 2. What’s the top speed gonna be at full throttle in 2nd gear all the way to redline? I’m kind of nervous about doing this on a public road. |
08-25-2018, 01:53 AM | #2 | |
Senior Member
Join Date: May 2012
Drives: 2013 Series 10 6MT FR-S
Location: Moreno Valley, CA
Posts: 5,565
Thanks: 2,013
Thanked 2,040 Times in 1,473 Posts
Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
|
Quote:
2. should be 55MPH ish...
__________________
2013 Series 10 FRS #553
RCE T2's, SPC LCAs -4/2.6 camber JDL 4-2-1 EL, FP and OP, Tuned by Zach@CSG on e85 RR Wilwood Front/Rear Sport BBK, Motul 600 Fluid ARC-8 17x9 SX2 GTs 245s/Koing 17x8 v730's 225's |
|
08-25-2018, 02:06 AM | #3 |
Senior Member
Join Date: Jul 2014
Drives: 2013 Scion FR-S 10 Series
Location: Clarendon Hills, IL
Posts: 617
Thanks: 442
Thanked 356 Times in 202 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
Full throttle is full throttle - meaning pushing the throttle down to its maximum travel. I have a manual transmission equipped FR-S, but if the throttle pedal on your car works like it does in most other cars with automatic transmissions, there’s a slight detent at the end of the normal travel that you must press through to get to full throttle. Typically, the detent activates a switch used by the ECU or transmission control unit to initiate a downshift - someone with more experience with an automatic equipped FR-S/BRZ/86 can jump in and correct me if I’m wrong.
I have no idea how quickly you’ll be traveling at the end of second gear, but I’ve sometimes done my data logging on a lightly traveled highway during off hours where I can judge the gap to the next car behind me (ideally, when there is no one even viable in my rear view mirror), slowed down to about 1,000rpm, initiated the data logging software, and then running through whatever gear I’m told to data log in. You may end up speeding, but probably not by much. In your car, I assume you’ll need to be in manual mode to lock the transmisssion into second gear, and then you should be able to do three quick successive runs from 1,000rpm to redline in the same data log. |
The Following User Says Thank You to RJasonKlein For This Useful Post: | stlgrym3 (08-25-2018) |
08-25-2018, 10:00 AM | #4 |
Senior Member
Join Date: Nov 2011
Drives: 2017 Subaru BRZ Limited
Location: socal
Posts: 562
Thanks: 72
Thanked 51 Times in 44 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
Just finished the full throttle logging in 2nd gear. I pressed harder beyond the bottom of the pedal travel, but I did not feel the pedal went in any further to signal of activating full throttle, however, I did feel the engine gave me that extra oomph so to speak. I guess the rev limiter kicked in toward the end (since I was well into the redline), as I felt my fuel was cut.
|
08-26-2018, 08:41 PM | #5 |
Senior Member
Join Date: Dec 2013
Drives: 2014 Scion FRS (Asphalt)
Location: Redmond, WA
Posts: 559
Thanks: 39
Thanked 173 Times in 143 Posts
Mentioned: 6 Post(s)
Tagged: 2 Thread(s)
|
Closer to 62mph for an automatic at the top of 2nd. 2017 autos did not get the 4.3 FD.
__________________
AVO Stage 2 Turbo Build Thread
https://wheelwell.com/tyler-nguyen-1...014-scion-fr-s |
08-27-2018, 09:26 AM | #6 | |
Senior Member
Join Date: Dec 2013
Drives: WRB BRZ
Location: New Jersey
Posts: 261
Thanks: 83
Thanked 150 Times in 96 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
08-27-2018, 11:35 AM | #8 |
Senior Member
Join Date: Nov 2011
Drives: 2017 Subaru BRZ Limited
Location: socal
Posts: 562
Thanks: 72
Thanked 51 Times in 44 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
|
I’m curious to know this too. I did mentioned the fuel cut toward the end of the log to the tuner.
|
08-27-2018, 03:54 PM | #9 |
Senior Member
Join Date: Dec 2013
Drives: WRB BRZ
Location: New Jersey
Posts: 261
Thanks: 83
Thanked 150 Times in 96 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
The fuel cut is quite jarring for the engine and drivetrain and it's certainly not necessary to subject both to that kind of stress. I absolutely hate doing it just because of how awful it feels when it happens.
|
08-27-2018, 07:07 PM | #10 | |
Senior Member
Join Date: Oct 2012
Drives: UK GT86
Location: UK
Posts: 3,040
Thanks: 185
Thanked 1,631 Times in 1,112 Posts
Mentioned: 155 Post(s)
Tagged: 1 Thread(s)
|
Quote:
Yes it feels crap, but that's because of the sudden lack of acceleration.
__________________
.: Stealth 86 :.
Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook |
|
08-27-2018, 07:29 PM | #11 |
Country Boy 4 Life
Join Date: Jul 2012
Drives: 19' & 06' Ridgelines, 13' FR-S
Location: EUGENE
Posts: 5,228
Thanks: 6,719
Thanked 5,292 Times in 2,720 Posts
Mentioned: 47 Post(s)
Tagged: 1 Thread(s)
|
I remember my first time... I was test driving my car.
__________________
I LIKE TIRES! |
The Following User Says Thank You to Leonardo For This Useful Post: | arkanist (08-27-2018) |
08-27-2018, 09:44 PM | #12 | |
Senior Member
Join Date: Jul 2014
Drives: 2013 Scion FR-S 10 Series
Location: Clarendon Hills, IL
Posts: 617
Thanks: 442
Thanked 356 Times in 202 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
|
Quote:
|
|
08-28-2018, 08:13 AM | #13 |
Banned
Join Date: Dec 2013
Drives: FT86
Location: Australia
Posts: 7,998
Thanks: 1,035
Thanked 4,988 Times in 2,982 Posts
Mentioned: 598 Post(s)
Tagged: 2 Thread(s)
|
You dont want to lift before rev limiter, as the tuner want to see how the engine is performing under full load ie full throttle), right up to redline.
While second gear is ok and reliatively legal on public roads, it probably better to do runs in third or even fourth gear it the car is going to be tracked, usually this requires a dyno or a racetrack but its usefull to gather that data. As the actual loads and duration of load on engine is different to say lower gears. Note that what is refered to as "load" in Subaru ecu is not actually load it s a derived parameter based on air flow and rpm, not actual load http://www.romraider.com/forum/viewt...hp?f=15&t=8218 |
08-28-2018, 01:21 PM | #14 | |
Senior Member
Join Date: May 2016
Drives: BRZ 2017 Pure Red, MT
Location: Quebec, Canada
Posts: 309
Thanks: 122
Thanked 121 Times in 83 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Quote:
That's also what I was thinking. Just wanted to know if this was something to do with the fact that he's tuning. I autocrossed my RSX for multiple years, and must have hit the rev-limiter literally hundreds of time. And the engine and drivetrain was still going strong at 175K miles. It was as abrupt as the brz. |
|
|
|
Thread Tools | Search this Thread |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Part throttle faster than full throttle | brn12345 | Engine, Exhaust, Transmission | 38 | 10-21-2021 01:20 PM |
Buzzing at full throttle 4k RPM | Krion | Issues | Warranty | Recalls / TSB | 3 | 08-04-2017 02:46 PM |
Full Throttle 1.5 Supercharger for sale | jpit | Engine, Exhaust, Bolt-Ons | 3 | 12-13-2015 12:40 AM |
86 Full Throttle Video + another. | Aus86 | FR-S & 86 Photos, Videos, Wallpapers, Gallery Forum | 2 | 04-02-2012 08:07 AM |