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Lightweight or Mid-weight flywheel?

I'm about to have a shop do my clutch/ flywheel/ CSC and trying to decide to go with a lightweight or "mid-weight" flywheel. Is the only disadvantage of the lightweight

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Old 01-24-2020, 11:28 AM   #1 (permalink)
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Default Lightweight or Mid-weight flywheel?

I'm about to have a shop do my clutch/ flywheel/ CSC and trying to decide to go with a lightweight or "mid-weight" flywheel. Is the only disadvantage of the lightweight flywheel the noise? I was also told that the midweight is a waste of money to either stay stock or go to the lightweight one.

Any of you have the mid-weight and do you like it and did you feel a difference?

Thanks.

I have not used the car for anything other than street driving in recent years, but plan to get back to the track at some point. It doesn't have any big power mods and I will keep it that way.
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Old 01-24-2020, 11:42 AM   #2 (permalink)
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I have the lightweight and can say it's honestly one of my favorite modifications to my car. The way the engine Revs is night and day. For me the chatter doesn't bother me and I had my tuner increase my idling RPMs a couple of hundred which reduced the chatter to where its hardly noticable. However, I have heard some people are more sensitive to it than others. For me I cared more about the performance gain and how the cars sounds while driving/reving. Also if I was going to pay the same money for the flywheel and labor for the install, I wanted to go as light as possible.

Maybe someone who has gone the Midweight option can speak to there experience. I believe they recommend them primarily for people who drag race the car and/or those who are sensitive to chatter.
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Old 01-24-2020, 12:00 PM   #3 (permalink)
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I have the ZSpeed EZStreet Stage 2 clutch/flywheel combo, and I highly recommend this one for its overall performance. Joe told me he'd rate it conservatively to 400tq, but the pedal pressure is just a bit more than stock. No longer will you get the "rubber band" lash trying to ease into 1st, and it just feels plain solid.

The flywheel is 20 pounds, and I thought this would be too light. However, it is just right!
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Old 01-25-2020, 01:33 PM   #4 (permalink)
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Thanks guys. I decided on the JWT clutch and flywheel (lightweight at about 15lbs) according to the shop guy's recommendation. I don't think the noise will bother me, as long as there's no down-sides. I am aware of the revs dropping between shifts but I'm ok with that.
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Old 01-25-2020, 02:53 PM   #5 (permalink)
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Go zpeed!
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Old 03-18-2020, 08:31 PM   #6 (permalink)
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Update... How's the jwt?
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Old 03-20-2020, 08:45 AM   #7 (permalink)
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To the street drivers with light flywheels: what was the transition like in terms of relearning? I’m a lifelong stick shift driver, but I always worried that getting stuck in traffic or navigating parking lots would become miserable.
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Old 03-20-2020, 09:23 AM   #8 (permalink)
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Don't know? Ask Joe!

www.zspeed.com
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Old 03-20-2020, 08:45 PM   #9 (permalink)
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Originally Posted by Dentt42 View Post
To the street drivers with light flywheels: what was the transition like in terms of relearning? I’m a lifelong stick shift driver, but I always worried that getting stuck in traffic or navigating parking lots would become miserable.
I have zspeed 17.5 lbs flywheel, I am more annoyed about where engagement happens than the flywheel itself, in fact, I don't think I feel a difference about it compared to stock, as it revs slower in low rpms and revs quickly when you go higher.

I only wish I went for lighter flywheel, I like the 8.8lbs flywheel on my race car, which I found easy to drive.
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Old 03-24-2020, 03:30 PM   #10 (permalink)
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Originally Posted by The Real JayZ View Post
Update... How's the jwt?
It's great! I'm completely satisfied with it. It definitely is noisy in traffic, but doesn't bother me at all. The clutch pedal feel is stiffer than stock, but I got used to it very quickly and don't even notice now. The lightness of the flywheel allows it to rev up super quick and feels amazing! Feels like an added 30hp! Of course no real HP has been added, but it feels that way b/c all of the wasted energy of rotating that heavy stock flywheel is now free. And the responsiveness makes rev matching while heel-toe easier too. Overall, I'm extremely happy. And he found the cause of the noise that I've been living with for years! It turned out to be busted upper control arm bushings. Got that replaced, and now I'm driving the car much more than I have in the past few years. Thanks for all the recommendations!
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Old 05-05-2020, 09:14 PM   #11 (permalink)
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Thought it would be worth following up on this one since I did actually make a decision.

My CMC went out completely last week, and although I was lucky enough to already have a CMAK kit waiting on my parts pile, it was silly to waste the labor installing it and not include a clutch.

I opted for EXEDYís Stage 1 kit, that comes with a 20 lb. flywheel. It was not cheap, but totally worth it. I understand now why going even lighter wouldnít be hard to manage, since Iím sure Iíll get used to the feel in another day or two. Rev matching on a down shift is almost effortless, and I love the response over the boat anchor bolted to these engines at the factory.

The EXEDY kit is also an excellent option on a street car. It eliminates the dual mass flywheel with no added chatter, which I didnít expect, and modulates from out to engaged so well I donít think Iím going to bother upgrading the pedal assembly.
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Old 05-06-2020, 11:07 AM   #12 (permalink)
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Quote:
Originally Posted by Dentt42 View Post
To the street drivers with light flywheels: what was the transition like in terms of relearning? I’m a lifelong stick shift driver, but I always worried that getting stuck in traffic or navigating parking lots would become miserable.
It takes a little bit to get used to it revving a little easier/quicker. I had an hour drive home from having mine installed and was pretty well adjusted by the time I got home, though.

Revs go up AND down faster and the car definitely felt more responsive.

I'm running the Z1 lightweight flywheel. According to my bathroom scale w/ and w/o holding the flywheel, it's 13.5lbs. I think it's listed at 15lbs. Stock is ~31lbs.

Also, if iirc, the lightweight and midweight are both single mass versus the OEM being a dual mass, which means you'll get the chatter with either, so you may as well get the most benefit possible.
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Old 05-06-2020, 03:00 PM   #13 (permalink)
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Slow revs are one of the biggest downsides to our engine; the lighter flywheel really changes the car. Even the lightest widely available ones are daily able

i think the only one that wouldn't be would be something like the Tilton 7 lb one which is for race cars and such
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Old 05-06-2020, 03:45 PM   #14 (permalink)
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Quote:
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Slow revs are one of the biggest downsides to our engine; the lighter flywheel really changes the car. Even the lightest widely available ones are daily able

i think the only one that wouldn't be would be something like the Tilton 7 lb one which is for race cars and such
That style is like a light switch. Either in or out. No inbetween.
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Old 05-07-2020, 06:31 AM   #15 (permalink)
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Quote:
Originally Posted by OptionZero View Post
Slow revs are one of the biggest downsides to our engine; the lighter flywheel really changes the car. Even the lightest widely available ones are daily able

i think the only one that wouldn't be would be something like the Tilton 7 lb one which is for race cars and such
The response on my car was abysmal with the stock one. It was like they were trying to hinder performance where it wasnít necessary.
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