Zazz93

iTrader: (2)

Try the heavier tranny oil, it saved me from throwing the flywheel out the window.

Redrobin350

Curious, most of the time I don't use a lot of rpms. Would I experience chatter when shifting out at 2k into the next gear with a light weight flywheel (thinking of a few that are 14-18lbs)? Talking about light throttle of course. Sounds like I would based on what everyone is saying. I do have a borla exhaust btw. Not really concerned about what I hear at idle.

Zazz93

iTrader: (2)

It has to be experienced to truly understand. I would say with lighter weight fluids it would make a considerable amount of rattle under 2,000 rpm with a moderate to heavy loading. I'll try to finish the video but I'm having a problem getting the noise across correctly.

For me pulling away on a slight up-hill in 2nd causes the rattle at about 10 mph. If I take it down to 1st its not a problem.

mx594

iTrader: (4)

If I shifted from 2nd into 3rd gear at 2000 rpm (so that I would be at something like 1500 rpm in 3rd) it would rattle like a mother effer, no matter how much (or little) throttle I give it.

dmroberson

iTrader: (26)

+1. I have the ACT heavy duty street clutch, with prolite flywheel. same results for me. low speed chatter, once moving though, goes away.

mx594

iTrader: (4)

So whats the verdict...will re-installing a 40k mile flywheel without resurfacing it damage my almost new clutch?

Zazz93

iTrader: (2)

I created a quick vid for the OP to give him an idea of what the heavier oils sound like with the light flywheel. Unfortunately I didn't get it up before leaving to work so it will have to wait.

As far as the resurface of the stock wheel, my machinist said he could do it with a little setup time (extra $). He was gonna dowel the moving parts with set-screws to keep it from moving and balance and resurface it. But I decided to go with the JWT Flywheel instead. Note my machinist was an ex-Nissan tech (among other manufacters) and had a little history with the dual mass flywheels.

Zazz93

iTrader: (2)

Here is the Vid, hope it gives you an idea of what the oil helps with.

http://www.youtube.com/watch?v=YyFgTg57j0Y

kenpo_350Z

iTrader: (15)

Holy cow I never knew that a lightened flywheel made it sound like that! Are all flywheels that loud? I was looking at the JWT fly.

kenpo_350Z

iTrader: (15)

http://www.youtube.com/watch?v=lUTpXk3vr8M

This video I came across with the JWT didn't sound loud at all at least from the inside. Maybe its not as bad as I originally thought. With my exhaust set up I doubt I would really notice much chatter lol.

mx594

iTrader: (4)

Thanks for the video. Thats exactly what mine sounds like at idle, but the noise at idle is not really what bothers me. I couldn't hear much in your drive-by except your exhaust I think? When I get my G back on the road later next week I will try to make a vid so you can hear mine. I should be able to get a pretty good recording from inside the car if I do a third gear roll starting at about 1500 rpm.

Zazz93

iTrader: (2)

That's it, right next to the wheel is the only place I could get it to make that noise on camera. Its actually not noticable at idle. But the drive by is where its most notible. Wish I had done something before the change in fluids because it was a 100x worst at idle and made that rattle noise everytime I took off vs now where I have to lug the engine down low. Also note, the exhaust is not rattling in the drive by that's all flywheel related noise.

And Kenpo, that is the JWT.

kenpo_350Z

iTrader: (15)

I guess after hearing your video and the other one I found on youtube. I wouldn't say that is enough to deter me from adding the lightened flywheel. If the gains are really that noticable it would be worth it to me.

Zazz are you impressed with yours?

Zazz93

iTrader: (2)

To be completely up front the flywheel doesn't feel like a huge difference in gear. I've felt the difference but but its more in the speed the revs increase when unloaded. Like blipping the throttle to match revs is far easier and the revs don't "float" as your shifting. The engine decels as you come off the throttle nearly immediately vs the heavy flywheels floaty feel. Now with that said, I would imagine if I removed it I'd hate the feel of a heavy flywheel.

Very subjective mod.

kenpo_350Z

iTrader: (15)

I have just recently started inquiring about this and need to do a lot more research, but it is nice hearing from those that have been there before. I have learned a ton from this site and forums.

ZSpeedPerformance

iTrader: (71)

The South Bend flywheel I have in classifieds or from the link in my sig will kill 99% of the noise

Zazz93

iTrader: (2)

Makes sense, the heavier the flywheel the less chatter (general rule of thumb). But does it allow the motor to spin-up when unloaded (similar to what the ultralight flys)?

3hree5ive0ero

iTrader: (95)

Let's think logically. Given that it requires more force to get the heavier mass to accelerate, do you think the heavier flywheel will rev as fast as a lighter flywheel when the same amount of force is applied (i.e., WOT)?

ZSpeedPerformance

iTrader: (71)

Exacty, These flys are for the people that don't want to hear the rattle from the trans associated with LW flywheels, You will still feel a gain VS the stock junk. Just not as big as with a lighter weight unit.
What you get is a highly durable flywheel, Lighter than stock without out all the noise.

Also much better for drag/street..

Zazz93

iTrader: (2)

I know that, but if you read the advertisment it suggests it just as good as some as the other flys on the market. A little puffery maybe...or just well written to get the suggestion.

Here is a bit from the ad that suggests different thinking.

"Because most of the weight has been taken from the circumference of the this flywheel you still get the advantages of less rotating mass while keeping the quite, stock like drive ability."