Leafy

iTrader: (1)

My old response to this used to be. Jesus no, but my clutch doesnt have one an I notice no real difference. Though some of that might be because of the carbon on carbon nature of the clutch.

kotomile

iTrader: (24)

+1 for the clutch being the bigger factor.

A pucked clutch is a lightswitch. There is very little engagement window, so if you use one with a light flywheel you'll probably hate it. This doesn't mean that the light flywheel is the culprit for the hit on driveability, though.

OP, go ahead and use a light flywheel, but pair it with a full-face, gentle clutch. I have the Fidanza flywheel and an ACT HD on my car and my wife drives it just fine.

mx5-kiwi

I had reservations on the FM happy meal clutch/flywheel kit with the lightest flywheel....

Got it and loved it. Near stock engagement and zero idle issues, take of from standing start, hill start etc.

Zero.

Was a lovely clutch and kit.

Savington

iTrader: (31)

+1. I've driven an ACT XT with a 9lb Fidanza and it was the shittiest clutch I've ever experienced (including my ceramic twin-disc). You could get the ceramic twin to the grocery store and back without getting arrested if you needed to, but that would be impossible with the XT/Fidanza combo. The only way to not stall it was to dump the clutch from 2000rpm and spin the tires a little bit.

I DD'ed a sprung 6-puck ACT HD with a stock flywheel for ~20k miles and it was a non-issue - took a little getting used to, sure, but not at all unstreetable. The stock-weight flywheel made the difference.

I now have a 9lb Fidanza with an ACT HD and a street disc in Rover, and it may as well be stock. Buttery smooth engagement, totally slippable, your grandmother could drive it.

TL;DR:

soviet

iTrader: (10)

my car has a 9lb flywheel, 6-puck ACT clutch and XT "Xtreme" pressure plate
you'd LOVE it

in my defense, I paid $400 for everything

18psi

iTrader: (76)

Oh I say I hate the XT and you call me a flapping vagina and Sav says the same thing and swing off those freshly dropped nuts like a kid on a playground

Savington

iTrader: (31)

soviet

iTrader: (10)

Baby, It's not what it looks like
I treat you like I treat all my women

timk

I have a 3.8kg (~8lb) TODA flywheel designed for a 1.6, plus a modified organic Exedy clutch. I daily drive the car and I find it's very drivable. The revs drop a bit quicker than normal but it's very easy to get used to.

It also sounds like a sports bike when you rev it in neutral.

Leafy

iTrader: (1)

You say that, have you heard a car with the 949 twin disk in neutral. That revs like a sports bike.

Der_Idiot

iTrader: (2)

I have an ACT XACT Prolight 10 pound flywheel and a SPEC stage 3 6-puck sprung 320 pounds torque clutch. Engagement point is nearly the same as stock, though it shudders during engagement unless you rev to 1500 or so. I drove it for 3 years in stop and go traffic, the only reason I stopped is because my shift changed and I don't have to stop so often. Yes, it sucked at first but it's painless once you get used to it. I don't even break over 1k rpm to get the car rolling anymore.

I like that my car shudders a bit when taking off from a stop, it lets my passenger know to

18psi

iTrader: (76)

Until you have to start replacing parts that are getting pounded from all the shuddering and bogging.

soviet

iTrader: (10)

I only get shudder if I try to slip it for longer than a second (e.g. creeping in 1st gear)

Der_Idiot

iTrader: (2)

^ That.

Scrappy Jack

iTrader: (2)

Would you describe your wife using similar phrasing to the following?
So that probably makes his opinion the best proxy for Amellrott's wife's.

As a husband whose wife refuses to even ride in my car, let alone drive it (edit: because Miata, not because racecar), I would suggest you go with a stock or slightly lighter flywheel (e.g. the FM 13.5 lbs unit) and a full-face clutch if possible given the expected torque output of the setup.

Save the 9 pounder for your naturally aspirated build.

soviet

iTrader: (10)

so much win

Mobius

iTrader: (2)

I have the FM 13lb flywheel and FM stage 1 clutch. Drives like stock. Pedal force is not high, engagement is smooth. My wife drives it with no issues. However, she drove a C2 vette to high school, and a manual trans 4wd K1500 GMC pickup for 10 years, so she may not qualify as a normal wife.

Chiburbian

iTrader: (1)

To be clear - what I understand your statement to mean is that believe the benefits of a lightweight flywheel to not be a worthwhile upgrade when you are already adding power with a turbo or supercharger.

I somewhat agree with you, but there are a few lightweight flywheel/clutch combos that will handle the torque without being "nasty" and in those circumstances I believe it is a worthwhile upgrade.

Drive the 949racing sport clutch with lightweight flywheel. Drive the Flyin' Miata Happy Meal. Both have reputations of being very street friendly while still having the benefits of a lighter flywheel and increased torque capacity.

In my opinion, with the right package a lightweight flywheel is a worthwhile upgrade.

FRT_Fun

iTrader: (19)

I read nothing but the title in this thread, and here is my post:

I owned a car with the FM happy meal, with a 10.4lb fw (or whatever FMs lightest fw weight was) and loved it. I noticed zero drivability issues (note: no a/c or power steering). And the responsiveness was a huge plus while driving.

This is coming from a strictly street driven miata point of view.