This is the biggest question i have...... we always talk about it, but no-one really knows the advantage of a Lightweight flywheel........ what does it do??? other then rev faster........ does your Q/M time get a little better and if yes by how much with stock engine?? does it put more horsepower to the wheels??? does it give you more torque?? what does it do????????............... sorry for posting this, i know theirs more posts about this, and ive read them!!! but we always talk about yea its better, but what are the reasons??!!!!!

 

Bwaahahahhahah!
https://honda-tech.com/zeropost?cmd=reply&id=3127153

 

well logic says that yes it would imporve your 1/4 times considering it allows it to rev faster. other than that idk.

edit:


[Modified by slowmanEF, 7:57 AM 10/28/2002]

 

Ben's Z Shrine
Dedicated to the 1990-1996 Nissan 300ZX
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What's a lightened flywheel, and why would I want one?

A flywheel is a fairly thick metal disc that bolts onto the back of the engine. Onto the crankshaft, actually. It helps the engine stay spinning inbetween pulses of power from the cylinders. It's also what the clutch's friction disc pushes against when you let the clutch pedal out.

The stock flywheel on the Z32 weighs about 28 pounds. Nissan made it this heavy deliberately - a relatively heavy flywheel helps smooth out the sudden onslaught of power the engine produces as the turbos kick in. This may be desireable for some people, as it makes the care feel smoother and more predictable under acceleration, and helps reduce wheelspin under heavy acceleration in the lower gears. A heavier flywheel also "stores" energy so taking off from a stop is easier - the engine has to do less work because the spinning inertia of the heavy flywheel helps get the car going.

However, the "moderating" effect of a heavy flywheel applies at all engine RPMs. In other words, a heavy flywheel reduces acceleration because the engine has to expend some of it's power spinning up the flywheel. That power is essentially lost (although "stored in the flywheel" is a more accurate term) and cannot be used to accelerate the car via the rear wheels.

A lightened flywheel is just what it sounds likes. It's a flywheel that is made of a lighter material than the stock one, or designed to be lighter, or both. A lighter flywheel has a couple of effects. Most noticeably, the engine is generally more responsive. When you get on the gas, the engine will rev up faster and the car will accelerate faster. When you lift, the engine will slow down faster, and so will the car. In general, the effect is said to be as good if not slightly better than installing an underdrive pulley. Another effect is that you'll have to rev the engine up slightly more at take-off, because the flywheel can no longer supply as much of the energy necessary to get the car rolling. In general, people have said that the increase in acceleration and responsiveness is more than worth this little quirk.

Because a lighter flywheel makes starting from a stop slightly more difficult, it's not generally recommended you put in a lighter flywheel if you're going to be drag racing much. The acceleration gained generally isn't considered worth the added difficult of getting a good launch.

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Hope that helps...I have a lightened fly in my sohc zc...Mainly its about throttle response. Its great for rev matching...and I think it has more practicality on a track than at the strip...

Great topic by the way

-Jake

 

HaHa i didnt know what was going on when i clicked your link HAHAHAH guess he really needs answers!

 

a flywheel does not increase dyno'ed HP it just allows you to get through your power band faster.