Lightweight Flywheel? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

View Poll Results: Buy a light flywheel or skip it?
LWFW 23 74.19%
No 8 25.81%
Voters: 31. You may not vote on this poll

Reply
 
 
 
LinkBack Thread Tools
Old 07-04-2010, 02:38 AM   #1
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default Lightweight Flywheel?

Buying an FM Stage 1 clutch to go with the new turbo setup. Do I get the happy meal or no? Trusted friends with boosted Miatas tell me it's not worth it. I've driven NA cars with really light flywheels and hated it. My buddy's 195whp 92 has a lightened stocker and I can't really tell. If it's of questionable benefit, I have better uses for the cash.
soloracer is offline   Reply With Quote
Old 07-04-2010, 02:45 AM   #2
Want fries with that?
iTrader: (3)
 
Join Date: Oct 2009
Location: Twin Cities, Minnesota
Posts: 2,023
Total Cats: -1
Default

Lightweight fly'll make your launches worse; the flywheel carries inertia which is transferred to the wheels. Lighter fly = less inertia; there was a guy who lost a couple tenths of a second on a 1/4 after putting in a lightweight flywheel.

It'll also be rev-happy. I think the stock Miata is too rev-happy, I sometimes find myself accidently revving up to 3.5 or 4k rpms on a regular launch because it just goes to quickly; a lighter flywheel'll just exacerbate that and make it worse.

It just comes down to feel.
rider384 is offline   Reply With Quote
Old 07-04-2010, 02:52 AM   #3
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,357
Total Cats: 1,322
Default

Street car, no. Track car, absolutely.
Savington is offline   Reply With Quote
Old 07-04-2010, 06:13 AM   #4
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

I have one and I like it.
timk is offline   Reply With Quote
Old 07-04-2010, 06:53 AM   #5
Elite Member
iTrader: (1)
 
NA6C-Guy's Avatar
 
Join Date: Feb 2008
Location: Birmingham Alabama
Posts: 8,038
Total Cats: 43
Default

One here, and I like it. Decent on the street, and I would imagine it being superior on the track.
NA6C-Guy is offline   Reply With Quote
Old 07-04-2010, 09:47 AM   #6
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default

Quote:
Originally Posted by Savington View Post
Street car, no. Track car, absolutely.
90% or more, street car. I was leaning towards the 13# or whatever the heavier one is. I imagine the 5# or so difference wouldn't be very detrimental to drivability. The flip side to the "moderate" approach though, is that I imagine any benefit may not really be worth $250. I'm guessing that money might be better spent on a slim Koyo radiator....which is what I'd do with it.
soloracer is offline   Reply With Quote
Old 07-04-2010, 10:49 AM   #7
Junior Member
iTrader: (3)
 
Join Date: Feb 2010
Location: boston, ny
Posts: 282
Total Cats: 0
Default

i dont have the fm one, but i noticed a nice difference when i went from stock to the 12lb xtd. i didnt feel like i lost any power, just some streetability. i went from 15psi on stock clutch and flywheel, to 18psi on the xtd, and the only thing i even notice is taking off from a stop, my clutch makes a wierd chirp if you go too easy on it. other than that, ill probably run this on the fidanza 4.3 clutch kit when i put it in, if the flywheels not too ripped up looking...lol... but that fm one was my first choice i just needed a cheap clutch at the time so i got that kit cheap instead...
yunvmyegt is offline   Reply With Quote
Old 07-04-2010, 11:22 AM   #8
Junior Member
 
Join Date: Mar 2009
Location: maine
Posts: 224
Total Cats: -1
Default

i'm a fan of mine. It can be more frustrating in city traffic but i got use to it. try not to go to light mine is 11.5lbs and i wouldn't want anything lighter than that.
94blackmx5 is offline   Reply With Quote
Old 07-04-2010, 11:51 AM   #9
Elite Member
iTrader: (2)
 
fooger03's Avatar
 
Join Date: Jan 2009
Location: Columbus, OH
Posts: 4,132
Total Cats: 187
Default

i'm all street. FM swayed me towards the heavier of their two lightweight flywheel options, and i haven't looked back since.
fooger03 is offline   Reply With Quote
Old 07-04-2010, 11:55 AM   #10
Junior Member
iTrader: (4)
 
Join Date: Feb 2009
Location: Raleigh, NC
Posts: 321
Total Cats: 0
Default

i have the 10lb and my car is just as easy to drive as stock... I voted "no" because i feel like there wasnt enough difference to justify the cost
kewilso3 is offline   Reply With Quote
Old 07-04-2010, 11:58 AM   #11
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default

Quote:
Originally Posted by fooger03 View Post
i'm all street. FM swayed me towards the heavier of their two lightweight flywheel options, and i haven't looked back since.
Hey,

You going to the next BMC autox? Maybe we could meet up and I could check your car out. Wait, no...I need to decide by like Tuesday or Wednesday. I;m leaning away from it actually.

So, Fooger....If you had to decide between the FW and a radiator upgrade......?
Also, since you have the very one I'm considering, how much difference did you notice between it and the stocker?
soloracer is offline   Reply With Quote
Old 07-04-2010, 12:00 PM   #12
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default

Quote:
Originally Posted by kewilso3 View Post
i have the 10lb and my car is just as easy to drive as stock... I voted "no" because i feel like there wasnt enough difference to justify the cost
Exactly the info I'm after! Not so much "I like it" but "It's worth/ not worth it."

Thank you.
soloracer is offline   Reply With Quote
Old 07-04-2010, 12:02 PM   #13
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default

Quote:
Originally Posted by yunvmyegt View Post
..... i didnt feel like i lost any power, just some streetability. i went from 15psi on stock clutch and flywheel, to 18psi on the xtd, and the only thing i even notice is taking off from a stop, my clutch makes a wierd chirp if you go too easy on it.
Just what I'm trying to avoid. I don't want to introduce any unnecessary quirkyness unless it provides a significant benefit.

Thank you
soloracer is offline   Reply With Quote
Old 07-04-2010, 12:04 PM   #14
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default

Great info folks. I appreciate all the input.
soloracer is offline   Reply With Quote
Old 07-04-2010, 12:21 PM   #15
I'm a terrible person
iTrader: (19)
 
FRT_Fun's Avatar
 
Join Date: Apr 2009
Location: Arizona
Posts: 7,293
Total Cats: 180
Default

I think we may have talked via email about this but..

I have the 10.3lb one.. whichever is the really light one, and I could notice a difference when driving a friends miata and mine back to back. I felt shifting was where I noticed the largest improvements. Never had any issues what so ever. Could money be spent elsewhere? Sure. I guess if it was FW vs Radiator I'd probably go radiator.
FRT_Fun is offline   Reply With Quote
Old 07-04-2010, 05:21 PM   #16
Elite Member
iTrader: (2)
 
fooger03's Avatar
 
Join Date: Jan 2009
Location: Columbus, OH
Posts: 4,132
Total Cats: 187
Default

Quote:
Originally Posted by soloracer View Post
Hey,

You going to the next BMC autox? Maybe we could meet up and I could check your car out. Wait, no...I need to decide by like Tuesday or Wednesday. I;m leaning away from it actually.

So, Fooger....If you had to decide between the FW and a radiator upgrade......?
Also, since you have the very one I'm considering, how much difference did you notice between it and the stocker?
flywheel or radiator, get the radiator.
radiator or coolant reroute, get the reroute

the difference in flywheel weight wasnt an 'OMG THATS CRAZY' difference, but when i swapped flywheels, i did a couple other mods at the same time (FM2 Hydra kit, clutch, exhaust, radiator, NB Head Swap, 6ULs, etc.) so noticing a difference that i can attribute to a single item wasn't possible

i was at the last BMC Cross in my black 99 n/a (CSP 114). I'm still chipping away at an oil leak in the turbo car. I've got to get busy on fixing the oil pan seal. I should go start that now....I'm so sick of pulling the motor though :(

I'll be out training during the next BMC AutoX (military), but plan to make events after 25 July - hopefully in the turbo
fooger03 is offline   Reply With Quote
Old 07-04-2010, 05:44 PM   #17
Elite Member
iTrader: (5)
 
Join Date: Oct 2007
Location: Canton, Ga
Posts: 1,707
Total Cats: 19
Default

I have a 12lb (I think) ACT street flywheel, there is a race flywheel, which I believe is around 10lbs. Stay far away from the aluminum ones... Personally I love it and wish I had went for the lighter one. The car revs very fast and is also much more responsive, but I also have a ligher crankshaft which was done at the same time.
Stealth97 is offline   Reply With Quote
Old 07-04-2010, 07:37 PM   #18
Senior Member
Thread Starter
iTrader: (10)
 
Join Date: Apr 2007
Location: Ohio
Posts: 800
Total Cats: 3
Default

Quote:
Originally Posted by fooger03 View Post
flywheel or radiator, get the radiator.
radiator or coolant reroute, get the reroute....
Got the M-Tuned reroute already (thanks Webby!). Flywheel SEEMS unnecessary but I'm going to have it all apart so I feel like I should suck it up and do it instead of regretting it. I just don't want to regret installing it. I'm just already starting to go over budget with this thing and have yet to turn a wrench! I want to make prudent purchases at this point.

I'm hoping my car will be ready for August autocross, we'll see. I'm the 95M with a black interior. If you see it, come say hello.
soloracer is offline   Reply With Quote
Old 07-04-2010, 09:18 PM   #19
I'm Miserable!
iTrader: (11)
 
Join Date: Apr 2008
Location: Texas, 'Murica
Posts: 2,505
Total Cats: 7
Default

Radiator > lightened flywheel. The miata has a light enough flywheel anyways IMO. I have driven one with a FM flywheel, and there were good and bads about it. I don't see spending the money for it.
chicksdigmiatas is offline   Reply With Quote
Old 07-04-2010, 09:22 PM   #20
Elite Member
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,322
Total Cats: 12
Default

I had a lightweight flywheel on my 1.6 setup and enjoyed it. When I went to my 1.8 conversion I didn't bother though. Just picked up a stock one, and I can't say I've missed it at all.
dustinb is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
ACT race clutch and AASCO 7lb. aluminum flywheel graexodus Miata parts for sale/trade 5 10-26-2015 02:48 PM
Auto Engine into Manual Car Wino General Miata Chat 0 09-23-2015 09:35 PM
1.6 clutch/flywheel on 1.8/6spd concealer404 Suspension, Brakes, Drivetrain 8 09-17-2015 01:04 PM
First to get it out of the way main Meet and Greet 1 09-05-2015 01:39 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:46 AM.