|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
04-01-2015, 12:55 PM | #1 |
It's the Mad Cow
Join Date: Aug 2013
Drives: 2013 Scion FR-S
Location: Marana, AZ
Posts: 2,378
Thanks: 1,019
Thanked 966 Times in 659 Posts
Mentioned: 146 Post(s)
Tagged: 0 Thread(s)
|
Has anyone actually lightened the factory flywheel?
So from what I have found the factory flywheel is 20.6lbs or so. I have bought the Aluminum single piece driveshaft and Perrin Water Pump, Alternator and Crank Pulleys but I also want to run a lighter flywheel however the ACT Streetlight is apparently back ordered everywhere.
This has brought me to considering just having the factory flywheel lightened but I have not found any threads yet of anyone who has done this and just how light there were safely able to get it to. Can anyone chime in who has done this or even heard of someone doing it and how light they were able to make the stock flywheel? Thanks.
__________________
Denny Crane /Rotary = Fail\ Capsule ER
05 GTO 408 Stroker \ 13 FRS 210 Twin Screw Supercharger on E85 \ 14 F-150 5.0L Last edited by Cross; 04-01-2015 at 01:15 PM. |
04-01-2015, 12:59 PM | #2 |
Trust me, I'm the Doctor
Join Date: Nov 2013
Drives: 2019 WRX Limited (WRB)
Location: North East PA
Posts: 2,723
Thanks: 4,304
Thanked 1,251 Times in 781 Posts
Mentioned: 33 Post(s)
Tagged: 1 Thread(s)
|
Wouldn't lightening the factory flywheel simply weaken it? As opposed to getting a flywheel designed to be lighter?
__________________
Subies Of Blessed Memory: '05 Forester, '08 WRX, '13 STi
Daily Driver: 2014 BRZ 6MT Limited ^GT5 Replay Photo Mode^ |
04-01-2015, 01:06 PM | #3 |
It's the Mad Cow
Join Date: Aug 2013
Drives: 2013 Scion FR-S
Location: Marana, AZ
Posts: 2,378
Thanks: 1,019
Thanked 966 Times in 659 Posts
Mentioned: 146 Post(s)
Tagged: 0 Thread(s)
|
This is a concern that's why I asked what level had the factory one been taken to safely.
I have lightened a few flywheels over the years a good example is the Mazda KL 2.5L V6 and 1.8L V6 Motors. Both motors were very similar but they had different weight flywheels. It was common to run the 1.8L Flywheel because it was 5 or so pounds lighter and then a few of us would lighten that flywheel 3-4 pounds and have a really nice light weight flywheel for less than 110.00 new. But this was years ago... (I actually just thought about how long ago and feel old... my son wasn't even born yet so that's over 10 years ago... damn being old) I honestly would like to just buy one but when they seem to be out of stock for the one I want or I have to buy one at 3 times the price... meh I want to consider other options when faced with that situation. The Streetlight is supposed to be a little heavier than the Fidanza and Prolight Flywheels, with all the other weight I am removing and keeping in mind I will be daily driving the car I almost find that maybe 14-15 pounds would be a good option to consider which lead me to look into what people had done to the stock flywheel.
__________________
Denny Crane /Rotary = Fail\ Capsule ER
05 GTO 408 Stroker \ 13 FRS 210 Twin Screw Supercharger on E85 \ 14 F-150 5.0L |
04-01-2015, 01:29 PM | #4 |
Trust me, I'm the Doctor
Join Date: Nov 2013
Drives: 2019 WRX Limited (WRB)
Location: North East PA
Posts: 2,723
Thanks: 4,304
Thanked 1,251 Times in 781 Posts
Mentioned: 33 Post(s)
Tagged: 1 Thread(s)
|
You're running with stock NA power as well?
__________________
Subies Of Blessed Memory: '05 Forester, '08 WRX, '13 STi
Daily Driver: 2014 BRZ 6MT Limited ^GT5 Replay Photo Mode^ |
04-01-2015, 01:36 PM | #5 |
It's the Mad Cow
Join Date: Aug 2013
Drives: 2013 Scion FR-S
Location: Marana, AZ
Posts: 2,378
Thanks: 1,019
Thanked 966 Times in 659 Posts
Mentioned: 146 Post(s)
Tagged: 0 Thread(s)
|
Yes this will be an NA E85 Bolt on setup for now, but knowing me that will not last I have already been thinking about building another turbo kit or going with the Edelbrock Supercharger kit when they hit the market.
__________________
Denny Crane /Rotary = Fail\ Capsule ER
05 GTO 408 Stroker \ 13 FRS 210 Twin Screw Supercharger on E85 \ 14 F-150 5.0L |
04-01-2015, 02:18 PM | #6 |
Shadetree Project Ratchet
Join Date: Apr 2014
Drives: series.Blue
Location: Greater DMV
Posts: 1,014
Thanks: 1,575
Thanked 634 Times in 376 Posts
Mentioned: 10 Post(s)
Tagged: 3 Thread(s)
|
I havent really looked at our flywheel, but most just add ballast to the outer most edge of the plate, and removing it has little effect on strength. I plan on having mine lightened as opposed to buying an aliminum plate. $100 compaired to $500.
[ame="https://www.youtube.com/watch?v=sl8F_ZtMhNk"]Subaru Flywheel lightening and Balancing - YouTube[/ame] [ame="https://www.youtube.com/watch?v=dX7xftnAE0U"]VR6 Flywheel Lightening - YouTube[/ame]
__________________
The Shadetree Project: I turn wrenches
|
04-01-2015, 03:13 PM | #7 |
Member
Join Date: Mar 2015
Drives: 2013 FRS
Location: Cockeysville, MD
Posts: 91
Thanks: 15
Thanked 74 Times in 30 Posts
Mentioned: 0 Post(s)
Tagged: 2 Thread(s)
|
I know it's another application, but people do it in the Turbo Dodge world:
http://turbosunleashed.com/shop/ligh...lve-p-324.html |
04-02-2015, 01:25 PM | #8 |
It's the Mad Cow
Join Date: Aug 2013
Drives: 2013 Scion FR-S
Location: Marana, AZ
Posts: 2,378
Thanks: 1,019
Thanked 966 Times in 659 Posts
Mentioned: 146 Post(s)
Tagged: 0 Thread(s)
|
But no one has done it on our side yet it seems, hmm well I guess I will do some more research on it.
__________________
Denny Crane /Rotary = Fail\ Capsule ER
05 GTO 408 Stroker \ 13 FRS 210 Twin Screw Supercharger on E85 \ 14 F-150 5.0L |
04-02-2015, 01:34 PM | #9 |
Senior Member
Join Date: Jul 2012
Drives: FRS
Location: Cali
Posts: 1,558
Thanks: 188
Thanked 461 Times in 264 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
Please read the following in a genuine, non douchebag tone:
Why would someone want the stock unit machined vs buying a new lightweight unit? They can be had for $300 and will be much lighter and likely stronger than a machined stock unit. A few other things to consider: 1. I don't think the flywheel you mentioned works with a stock clutch. Keep that in consideration. 2. It has been claimed, by some, that running a lightweight flywheel and crank pully together is not a good idea. You may want to read up on that topic before you make the jump. |
04-02-2015, 01:42 PM | #10 | |
It's the Mad Cow
Join Date: Aug 2013
Drives: 2013 Scion FR-S
Location: Marana, AZ
Posts: 2,378
Thanks: 1,019
Thanked 966 Times in 659 Posts
Mentioned: 146 Post(s)
Tagged: 0 Thread(s)
|
Quote:
The ACT Streetlight works with the Factory Clutch the Prolight does not. The only other Flywheel Under 300 I have found so far is the Fidanza and I have never liked the fact that they bolt on removing surface area from use which is why I avoid them. (I also believe Spec sells the Fidanaza just with a Spec sticker added, but I could be mistaken) The Cusco is over 600 so that's out. As for strength that's been addressed above by myself and others so that answers your concerns there. So as I originally stated, I want the ACT Streetlight, it works, it fits but its back ordered everywhere this leaves me the Fidanza or Lightening a stock one. As for the concerns of running a lightweight pulley and flywheel that's a tuning issue if you are concerned with idle. Even then it's honestly not that big of an issue and considering I also bought the Lighter Single Piece Driveshaft that is yet another point of weight reduction that would have an effect on idle. If it's about getting used to the feeling well that's really any change done to a car. When I turboed it there were changes to get used to, when I put the 408 Stroker in the Vette and then the GTO again that was a big change. None of that makes it detrimental unless it somehow exceeds your ability to handle it which a flywheel, pulleys and driveshaft should not. And no I am not being mean to you here I am just quickly addressing what could turn into misinformation.
__________________
Denny Crane /Rotary = Fail\ Capsule ER
05 GTO 408 Stroker \ 13 FRS 210 Twin Screw Supercharger on E85 \ 14 F-150 5.0L |
|
04-02-2015, 01:44 PM | #11 | |
Banned
Join Date: Sep 2013
Drives: 2013 GBS BRZ Limited
Location: Colorado
Posts: 1,925
Thanks: 627
Thanked 1,445 Times in 711 Posts
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Most of the rotational inertia in the FW is at the perimeter. You can easily shed more than half of the rotational inertia while shedding less than half the FW's weight. So removing from only the perimeter will make it lighter and less likely to fly apart (effectively stronger). |
|
The Following 5 Users Say Thank You to stugray For This Useful Post: | Cole (04-10-2015), Cross (04-02-2015), Hyper4mance2k (04-02-2015), Koa (04-03-2015), wparsons (04-02-2015) |
04-02-2015, 04:11 PM | #12 |
Senior Member
Join Date: Jul 2012
Drives: FRS
Location: Cali
Posts: 1,558
Thanks: 188
Thanked 461 Times in 264 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
I hear you.
The exedy stage one clutch kit comes with a 12lb wheel and clutch for under $400. That's what I went with, but I got mine for a lot less (on sale). Exedy also sells a direct fit 12lb flywheel for around $300. I believe it's chromoly but don't quote me on that. I understand your hesitation with the bolt on surface areas. That said, I have yet to hear about any problems with them. If it was me, I would research them more before passing. If I could go back I would likely buy one to get an even lighter flywheel. I confess I don't know much about ACT products. Any word when they will be back on the shelf? When I was referring to issues with running a crank pully and flywheel I wasn't pointing to drivability issues. One of the engine builders on the forum (the name escapes me) posted that they never suggest FA20 customers run both as, they claim, it puts a lot of extra stress on the bearings. They claimed to have seen a few failures... Maybe look it up and take it for what it's worth I guess. Not trying to sour the punch, just trying to add to the conversation. |
The Following User Says Thank You to wootwoot For This Useful Post: | Cross (04-02-2015) |
04-02-2015, 04:17 PM | #13 | |
It's the Mad Cow
Join Date: Aug 2013
Drives: 2013 Scion FR-S
Location: Marana, AZ
Posts: 2,378
Thanks: 1,019
Thanked 966 Times in 659 Posts
Mentioned: 146 Post(s)
Tagged: 0 Thread(s)
|
Quote:
I keep hearing about this Exedy kit but I can't seem to find just the flywheel so far because that I would buy without hesitation as well. I have never had a product from them give me issues. I remember hearing about people talk about Dampeners and Balancers and this always starts a heated debate but honestly most engines since the early 90's have been internally balanced and the small rubber insert that rots after a few years really is more of a noise dampener, I always ask how something that I constantly see failed, cracked and coming apart is doing it's job any better than an aftermarket lightweight version. (Of course this is directed at Crank Pulleys) Flywheels being lighter just don't strike me as something to cause issues unless they were not properly balanced. I believe a vendor recently did a write up on the Crank side explaining that part but I want to find the information on the Flywheel side so I can read it, I am always over protective with my vehicles. Let me go find that Vendor and hopefully the thread on the Crank Pulley one. Found it, @NonStopTuning did the write up http://www.ft86club.com/forums/showp...56&postcount=3
__________________
Denny Crane /Rotary = Fail\ Capsule ER
05 GTO 408 Stroker \ 13 FRS 210 Twin Screw Supercharger on E85 \ 14 F-150 5.0L |
|
04-02-2015, 04:21 PM | #14 |
Senior Member
Join Date: Apr 2014
Drives: 2014 Subaru BRZ Limited 6smt
Location: North Bay
Posts: 810
Thanks: 478
Thanked 223 Times in 179 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
So the stock flywheel on our little 2.0L weighs more than the stock flywheel on a truck.
Bring it to a shop and shave some weight. Report back with findings |
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Flywheel Chatter | samisons | Issues | Warranty | Recalls / TSB | 13 | 12-05-2014 09:30 AM |
Fs: act flywheel and clutch | Guildjs | Transmission and Driveline | 9 | 05-18-2014 03:26 PM |
Stock clutch+flywheel+pressure plate+ ACT lightweight flywheel & pressure plate | PineappleFriedRice | Transmission and Driveline | 0 | 11-08-2013 04:54 PM |
*Perrin Performance/Agency Power LIGHTENED Crank Pulleys In Stock* | 10k Redline | Engine, Exhaust, Bolt-Ons | 7 | 10-15-2012 10:51 PM |
Swap: factory 16s for factory 17s Sydney | MZ21 | Australia Classifieds | 10 | 07-29-2012 10:46 PM |