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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 05-26-2013, 11:46 PM   #21
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Originally Posted by triple88a View Post
Make sure you get an unsprung disc too.
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.
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Old 05-27-2013, 01:47 AM   #22
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+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.
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Old 05-27-2013, 03:17 AM   #23
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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.
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Old 05-30-2013, 11:44 PM   #24
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Quote:
Originally Posted by kotomile View Post
+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.
+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:

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Originally Posted by Savington View Post
Full-face disc = lightweight flywheel
Pucked disc = stock flywheel
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Old 05-31-2013, 02:03 AM   #25
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Originally Posted by Savington View Post
+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.

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
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Old 05-31-2013, 02:42 AM   #26
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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

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Old 05-31-2013, 03:31 AM   #27
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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
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Old 05-31-2013, 03:52 AM   #28
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Originally Posted by 18psi View Post
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
Baby, It's not what it looks like
I treat you like I treat all my women
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Old 05-31-2013, 03:56 AM   #29
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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.
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Old 05-31-2013, 08:28 AM   #30
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Originally Posted by timk View Post
It also sounds like a sports bike when you rev it in neutral.
You say that, have you heard a car with the 949 twin disk in neutral. That revs like a sports bike.
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Old 05-31-2013, 02:09 PM   #31
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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
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Old 05-31-2013, 02:13 PM   #32
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Until you have to start replacing parts that are getting pounded from all the shuddering and bogging.
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Old 05-31-2013, 02:17 PM   #33
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I only get shudder if I try to slip it for longer than a second (e.g. creeping in 1st gear)
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Old 05-31-2013, 04:18 PM   #34
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^ That.
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Old 05-31-2013, 04:19 PM   #35
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Quote:
Originally Posted by kotomile View Post
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.
Would you describe your wife using similar phrasing to the following?
I am married and this will be driven by my wife a lot, she is bitchy on good days and will make my life hell if the car is too twitchy or difficult to drive.
Quote:
Originally Posted by soviet View Post
But Vlad, we all know you're a flapping vagina, so of course you hated it.
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.
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Old 05-31-2013, 04:57 PM   #36
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Originally Posted by Scrappy Jack View Post
So that probably makes his opinion the best proxy for Amellrott's wife's.
so much win
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Old 06-01-2013, 12:57 AM   #37
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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.
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Old 06-04-2013, 11:06 AM   #38
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Quote:
Originally Posted by hypforlife32 View Post
For boost id always stay stock flywheel and choose a clutch dependent on your tq level. No need for a lightweight flywheel and a nasty clutch. It's a waste.
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.
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Old 06-04-2013, 11:29 AM   #39
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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.
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