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Old 10-02-2008, 08:33 PM   #1
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Default Anyone ever put NA6 Flywheel in NB8B?

Im keen to reduce the weight/rotating mass of the flywheel as much as possible by installing a toda flywheel. Has anyone installed the smaller NA 1.6 (toda) flywheel into an NB8B.

Is the clutch alignment tool the same for NA and NBs (same size number of teeth etc)?

What clutch did you get (ie smaller surface area from the NA flywheel so did get a more beefy 1.6 clutch with more clamping force to compensate etc?)

Im on stock with no plans for a turbo as yet any recomendations tips etc would be apreciated.
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Old 10-02-2008, 08:45 PM   #2
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if you go with the 1.6 flywheel you need a 1.6 clutch. same thing with the 1.8.

they sell lightweight flywheels and upgraded 1.8 clutches too
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Old 10-02-2008, 09:05 PM   #3
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Cool was thinking stage one exceedy NA clutch + NA flywheel.

Ive read some turbo NAs install the heavier/larger NB cltuch and flywheel in but never seen any NB8B owners install NA clutch and flywheel...
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Old 10-02-2008, 10:30 PM   #4
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there is a reason for that....think about it
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Old 10-02-2008, 10:43 PM   #5
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I've seen a couple 1.8s with 1.6 clutches, but they usually aren't exactly "big power" cars...

Here's the thing; the larger surface area and better leverage on the pressure plate means that all else being equal, the 1.8-size unit can (1) match the clamping force of the smaller clutch, with a lighter pedal effort, and/or (2) provide greater clamping force for the same pedal effort.

So, in light of that, do you really want to use a 1.6 clutch?
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Old 10-03-2008, 12:53 AM   #6
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when the clutch on my 99 goes out I've considered doing a 1.6l ACT XT with a 1.6l flywheel. Benefit would be the lighter rotating mass, without the issues that can come from a lightened flywheel - IE possible chatter, being more prone to stall, etc. Cue the lightened flywheel owners posting they don't have problems, but I've had friends who have. The pedal effort would be higher on the ACT XT, but I love a heavy pedal.
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Old 10-03-2008, 12:56 AM   #7
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i have a act stage 2 clutch witha lightened flywheel and its a 1.8 combo on a 1.8 trans attacehd to a 1.6 motor. i love how it feels and grabs amazingly
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Old 10-03-2008, 12:58 AM   #8
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Quote:
Originally Posted by tronik View Post
when the clutch on my 99 goes out I've considered doing a 1.6l ACT XT with a 1.6l flywheel. Benefit would be the lighter rotating mass, without the issues that can come from a lightened flywheel - IE possible chatter, being more prone to stall, etc. Cue the lightened flywheel owners posting they don't have problems, but I've had friends who have. The pedal effort would be higher on the ACT XT, but I love a heavy pedal.
So, err, you only want a *little* extra mass off of the flywheel/clutch at the expense of a heavier pedal and less headroom?

Cue me telling you I have an ACT HD and a Fidanza 1.6 flywheel and have no problems. But I'll be upgrading to a 1.8 flywheel (of some sort) and a 1.8-size clutch when the time comes to make more power.
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Old 10-03-2008, 01:10 AM   #9
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rewind to where I didn't mention that I've gone the 1.8 clutch and 1.8 flywheel on a 1.6 car. With no forced induction to make up the difference, just that modification really affected the responsiveness of the engine negatively. It just didn't want to rev anymore. Used an ACT HD PP with an exedy stock disk, and an OEM flywheel. It grabbed and felt awesome. But the car was really, really slow.

But to each his own, just my experience.
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Old 10-03-2008, 01:39 AM   #10
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I dont have any massive power goals its just a stock NB8B daily driven, very occasional track day.

A 1.6 Toda is about 4 kg, I doubt I could machine down a stock 1.8 flywheel to 4 kg (safely). Smaller diameter = less rotating mass should rev out quite easily. Im guessing a 4 kg flywheel can be daily driven, just takes time to get used to it?

I dont mind a slighly firm pedal feel I guess it would be like getting used to a car without ps?
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Old 10-03-2008, 01:55 AM   #11
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I'm planning on using my 1.6 ACT XT and Jun flywheel on my 1.8 swap when I get there...someday. lol
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Old 10-03-2008, 08:24 AM   #12
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Quote:
Originally Posted by wun911 View Post
I dont have any massive power goals its just a stock NB8B daily driven, very occasional track day.

A 1.6 Toda is about 4 kg, I doubt I could machine down a stock 1.8 flywheel to 4 kg (safely). Smaller diameter = less rotating mass should rev out quite easily. Im guessing a 4 kg flywheel can be daily driven, just takes time to get used to it?

I dont mind a slighly firm pedal feel I guess it would be like getting used to a car without ps?
I just wonder if the loss of a little rotational mass is worth the tradeoff, that's all.
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Old 10-03-2008, 09:39 AM   #13
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I swapped from the stock 1.8 clutch/pp/flywheel to a 1.6 Fidanza flywheel, and 1.6 clutchnet (red 2x i think). apart from some flywheel chatter on decel and a little shudder at low rpms, which are to be expected w/ a light flywheel/clutch combo, it works flawlessly.

Its holding fine w/ my w/i coldside. I skipped out onthe last dyno day to get out to the track so i cant tell you exact hp/torque.
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Old 10-03-2008, 10:18 AM   #14
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I would just take the stock 1.8L flywheel and have it shaved down some. A good machine shop can cut a few pounds off of it.

Before you do that, have you ever driven a car with a lightened flywheel? If not id suggest you try one before you commit to it.
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Old 10-04-2008, 09:50 AM   #15
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Quote:
Originally Posted by levnubhin View Post
I would just take the stock 1.8L flywheel and have it shaved down some. A good machine shop can cut a few pounds off of it.

Before you do that, have you ever driven a car with a lightened flywheel? If not id suggest you try one before you commit to it.
Exactly I hate how they feel!!!
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Old 10-04-2008, 12:41 PM   #16
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I read somewhere that 01+ stock flywheels are actually lighter than 1.6 stock flywheels. Something like 16 vs 18 lbs.
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Old 04-29-2009, 12:29 AM   #17
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Sorry to resurect this thread I know its been a while. I eventually got a prolite 9 lb flywheel (the same one you guys had a GB on) and Exeedy HD clutch. I decided to ditch the 1.6 flywheel idea.





The weight is displayed grams.





I installed the clutch and flywheel myself on ramps the driveway.





I'm really happy with it. I feel its more rev happy and more fun to drive. The effect of the flywheel is only noticable in the first 3 gears. I stall it when I reverse sometimes, but I have since gotten used to it. I dont think its more noisy (I still have stock carpet and sound deadining in the car). Not a pain to drive in stop start traffic but new clutch does help I guess.

Exeedy HD clutch is very soft does not take any effort push the clutch pedal down. Lots of 'feel' engagement to play with, very easy to live with for a daily driver.
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