|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
05-12-2021, 07:35 PM | #1 |
Persona Non Grata
Join Date: Nov 2015
Drives: '15 BRZ (WRB)
Location: On the Border
Posts: 1,882
Thanks: 2,016
Thanked 2,780 Times in 1,200 Posts
Mentioned: 10 Post(s)
Tagged: 1 Thread(s)
|
Torsional Vibration Damper - FA20
Engine Labs article on the development of the Fluidampr for the FA20.
It has in interesting comparison between the various alternative designs of crank pulleys using a twin as a test mule. https://www.enginelabs.com/news/gues...rzwrx-dampers/
__________________
Slow is smooth, and smooth is fast
|
The Following 4 Users Say Thank You to Capt Spaulding For This Useful Post: |
05-13-2021, 09:03 AM | #2 |
Be Kind
Join Date: Apr 2020
Drives: 2020 86
Location: MD
Posts: 1,078
Thanks: 5,162
Thanked 1,254 Times in 605 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
Six year old article... I wonder if anyone is running this?
__________________
|
05-13-2021, 09:08 AM | #3 |
Senior Member
Join Date: Mar 2014
Drives: '15 BRZ RA
Location: Greece
Posts: 3,787
Thanks: 2,416
Thanked 1,944 Times in 1,261 Posts
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
|
It looks to be an old article. Do they want to sell the old stock?
|
05-13-2021, 09:25 AM | #4 |
Be Kind
Join Date: Apr 2020
Drives: 2020 86
Location: MD
Posts: 1,078
Thanks: 5,162
Thanked 1,254 Times in 605 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
For anyone who wants to dig a little deeper: https://www.ft86club.com/forums/show....php?p=3302739
__________________
|
05-13-2021, 09:41 AM | #5 |
Rust bucket enthusiast
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 3,934
Thanks: 3,200
Thanked 4,095 Times in 2,045 Posts
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
|
I knew I had seen this data somewhere. Still, a nice re-read
__________________
Turbo FR-S Build - Build Thread
JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block |
The Following User Says Thank You to DarkPira7e For This Useful Post: | Wally86 (05-13-2021) |
05-13-2021, 10:06 AM | #6 | |
LMGTFY
Join Date: Mar 2016
Drives: 13 FRS, 91 Miata
Location: Lava Town, HI
Posts: 2,776
Thanks: 5,561
Thanked 3,646 Times in 1,625 Posts
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
|
Quote:
The Fluidamper made more power than the OEM and the lightweight lost power. Then of course there is no way to verify said dyno sheet. |
|
05-13-2021, 10:28 AM | #7 | |
Be Kind
Join Date: Apr 2020
Drives: 2020 86
Location: MD
Posts: 1,078
Thanks: 5,162
Thanked 1,254 Times in 605 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
Quote:
On the plus side, if a shop wanted too, they could easily replicate this experiment.
__________________
|
|
05-13-2021, 10:47 AM | #8 |
Senior Member
Join Date: Mar 2018
Drives: 17 Asphalt 86
Location: Ottawa
Posts: 2,169
Thanks: 1,709
Thanked 2,213 Times in 1,130 Posts
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
|
Interesting. What I took from this is when/if I ever lighten the flywheel I will add this to parts list.
|
05-13-2021, 10:59 AM | #9 | |
Rust bucket enthusiast
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 3,934
Thanks: 3,200
Thanked 4,095 Times in 2,045 Posts
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
|
Quote:
I'm looking for perceived engine roughness, and noise mostly. Still not sure if I'll make the effort just yet but I'll post it I do. My build is a long ways out still do don't expect anything soon
__________________
Turbo FR-S Build - Build Thread
JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block |
|
The Following User Says Thank You to DarkPira7e For This Useful Post: | Wally86 (05-13-2021) |
05-13-2021, 12:51 PM | #10 |
Senior Member
Join Date: Mar 2017
Drives: _
Location: _
Posts: 440
Thanks: 50
Thanked 178 Times in 104 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
OEMs spend a lot of time and resources to tune the whole accessory drive system - rotational inertias, damping coeffs, and frequencies. Unless you tune the whole system including flywheel and all accessories on the belt, it's not wise to change one pulley or flywheel and leave the rest stock. Sometimes torsional dampers work better, some other times having a higher polar inertia work better to tune out the firing order vibrations (2nd in our case).
Higher the inertia, lower the "shock loading". That's why heavier flywheels give smoother ramp ups and ramp downs. |
05-13-2021, 02:02 PM | #11 |
Persona Non Grata
Join Date: Nov 2015
Drives: '15 BRZ (WRB)
Location: On the Border
Posts: 1,882
Thanks: 2,016
Thanked 2,780 Times in 1,200 Posts
Mentioned: 10 Post(s)
Tagged: 1 Thread(s)
|
Thanks for the insights guys. Sorry if it's old hat to most of you. I noticed the article is a bit long in the tooth (as am I). I ran across it reading up on harmonic balancers/torsional dampers which led me to Fluidampr's site. As a non-engineer what I found most interesting was the theory regarding what's happening. For the mechanical engineering unwashed such as myself Fluidampr's website has some interesting reading material - including a link to another old article about torsional vibration issues with Cosworth's old CA F1 engine (an NA 20,000 rpm, 2.4L V8).
For me anyway, it put to rest the "high performance lightweight crank pulley" fable.
__________________
Slow is smooth, and smooth is fast
|
The Following User Says Thank You to Capt Spaulding For This Useful Post: | Wally86 (05-13-2021) |
05-13-2021, 03:15 PM | #12 |
Member
Join Date: Sep 2019
Drives: Scion FRS 10 series
Location: Santa Rosa CA
Posts: 39
Thanks: 6
Thanked 25 Times in 17 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
I have run the Fluidampr for 2 years as a daily, the engine powerband feels smoother than stock, no issues at all. It's not a power adder, it will help the engine in the long run. Here is another article from Motoiq https://motoiq.com/fluidampr-the-independent-test/
|
The Following 4 Users Say Thank You to Project_1796 For This Useful Post: | Capt Spaulding (05-13-2021), DarkPira7e (05-13-2021), Wally86 (05-13-2021), whataboutbob (05-14-2021) |
05-13-2021, 05:16 PM | #13 |
Rust bucket enthusiast
Join Date: Feb 2017
Drives: 2013 Turbo Firestorm FRS
Location: Vermont
Posts: 3,934
Thanks: 3,200
Thanked 4,095 Times in 2,045 Posts
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
|
There's absolutely nothing wrong with sharing good, helpful, nonspeculative information I'd rather see an article like this pop up twice a month than shenanigans about the next gen BRZ that people are guessing about
__________________
Turbo FR-S Build - Build Thread
JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block |
The Following User Says Thank You to DarkPira7e For This Useful Post: | Capt Spaulding (05-13-2021) |
05-13-2021, 06:26 PM | #14 | |
Be Kind
Join Date: Apr 2020
Drives: 2020 86
Location: MD
Posts: 1,078
Thanks: 5,162
Thanked 1,254 Times in 605 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
|
Quote:
If this helps make the motor sound less like a diesel, I'm all for it
__________________
|
|
The Following User Says Thank You to Wally86 For This Useful Post: | Capt Spaulding (05-13-2021) |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Performing FA20 swap with new FA20 | Ctoner2653 | Engine Swaps | 8 | 09-24-2021 08:40 AM |
Blown 2016 FA20 swap 2017 FA20 | HRLQN | Engine Swaps | 11 | 10-15-2019 07:17 AM |
FRS VS BRZ Damper (strut) | kilohercas | Suspension | Chassis | Brakes -- Sponsored by 949 Racing | 2 | 09-24-2015 03:11 PM |
Damper crosstalk | ayau | Suspension | Chassis | Brakes -- Sponsored by 949 Racing | 1 | 08-01-2013 02:21 AM |