Lightweight Flywheels

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Lightweight Flywheels
Topic Started: Dec 29 2009, 09:54 PM (466 Views)
tr4c3	Dec 29 2009, 09:54 PM Post #1
Guitarist for Hire Posts: 1,009 Group: Members Member #39 Joined: March 2, 2009 Location: Toms River, NJ	So what is the issue with light weight flywheels again? How many of you have actually used them and had issues yourselves? Not trying to bicker, just honestly curious cause I've driven cars with and without them and I've never heard of any kind of issue the way you guys make it seem. If they were bad why would multiple companies mass produce them? Just want to add, I'd like to hear opinions from people who actually own/have used them. Not opinions found on the internet. Edited by tr4c3, Dec 29 2009, 09:59 PM.



Nick Merrone	Dec 29 2009, 09:58 PM Post #2
eat me. Posts: 7,204 Group: Admin Member #1 Joined: February 7, 2009 Location: Philly,PA My Ride: 90 hatch Blog Please insert the title of your blog	When i bought my motor mine came with one, it was in decent shape but alot of people told me to get rid of it..so i did..lol



tr4c3	Dec 29 2009, 10:00 PM Post #3
Guitarist for Hire Posts: 1,009 Group: Members Member #39 Joined: March 2, 2009 Location: Toms River, NJ	I'd like to know why though.



Blake	Dec 29 2009, 10:04 PM Post #4
. Posts: 5,250 Group: Admin Member #17 Joined: February 22, 2009 Location: Fishersville, Va	I had a cheap one in my last s14 and I had no problems with it at all... Just a slight vibration from like 4,000 down to 3200 rpms.. That was all..



Deleted User	Dec 29 2009, 10:36 PM Post #5
Deleted User	had a 10 lb fidanza.... sure it revved faster "parasitic drag" but you also lose tq as well. its really a matter or whats more important to you.
Deleted User


98camaroz	Dec 29 2009, 11:14 PM Post #6
VIP Posts: 258 Group: Members Member #185 Joined: September 10, 2009 Location: Greensboro, NC My Ride: 1998 Camaro Z/28, 1992 240sx coupe KA-T, 2000 Sonoma	i got a fidanza 10lb, i love it. no problems at all.



240_fun	Dec 29 2009, 11:46 PM Post #7
I'm Poor Posts: 1,138 Group: Members Member #46 Joined: March 3, 2009 Location: Pennington, NJ My Ride: 1992 240sx SE Hatch / 2000 Ranger XLT Off-Road	one issue is when drifting and using a clutch kick method you want as much weight from the flywheel forward and the least weight from that back in order to take full advantage of that method. deviation from this will cause your clutch kick to not be as effective and it will not get ur back out as easily



240_fun	Dec 30 2009, 12:05 AM Post #8
I'm Poor Posts: 1,138 Group: Members Member #46 Joined: March 3, 2009 Location: Pennington, NJ My Ride: 1992 240sx SE Hatch / 2000 Ranger XLT Off-Road	that and the KA crankshaft is only half balanced... when reducing weight in the pulleys and flywheel it will put more unbalance in the motor (does that makes sense? idk how to word that better) to really take advantage of a lighter rotating assembly it would all have to be balanced together...



98camaroz	Dec 30 2009, 12:24 AM Post #9
VIP Posts: 258 Group: Members Member #185 Joined: September 10, 2009 Location: Greensboro, NC My Ride: 1998 Camaro Z/28, 1992 240sx coupe KA-T, 2000 Sonoma	my crank is balanced also



Kevin	Dec 30 2009, 12:28 AM Post #10
Horsedick.MPEG Posts: 2,057 Group: Members Member #222 Joined: October 8, 2009 My Ride: Honda CRX	A lightweight flywheel allow you to spin the motor aka the RPMS up faster because the rotating mass is lighter. However when you let go of the gas the RPMS drop much faster because of the momentum loss. I spoke to Justin at Spec clutch about this last week. He recommended aluminum for time attack, drift, rally, and autocross dedicated cars. Drag, and street cars he recommended steel. The clutch engagement with aluminum is also much different and harder. If you car is street driven with some fun use steel, if its a track car (not drag) use aluminum



diggles240	Dec 30 2009, 12:34 AM Post #11
Old Fart! Posts: 6,109 Group: Admin Member #58 Joined: March 18, 2009 Blog musty toes and moth balls.	Thanks Kevin



240_fun	Dec 30 2009, 12:42 AM Post #12
I'm Poor Posts: 1,138 Group: Members Member #46 Joined: March 3, 2009 Location: Pennington, NJ My Ride: 1992 240sx SE Hatch / 2000 Ranger XLT Off-Road	98camaroz Dec 30 2009, 12:24 AM my crank is balanced also good man! did u buy a fully counterweighted crank or just have yours balanced?



tr4c3	Dec 30 2009, 09:16 AM Post #13
Guitarist for Hire Posts: 1,009 Group: Members Member #39 Joined: March 2, 2009 Location: Toms River, NJ	Kevin Dec 30 2009, 12:28 AM A lightweight flywheel allow you to spin the motor aka the RPMS up faster because the rotating mass is lighter. However when you let go of the gas the RPMS drop much faster because of the momentum loss. I spoke to Justin at Spec clutch about this last week. He recommended aluminum for time attack, drift, rally, and autocross dedicated cars. Drag, and street cars he recommended steel. The clutch engagement with aluminum is also much different and harder. If you car is street driven with some fun use steel, if its a track car (not drag) use aluminum This was the kind of answer I was looking for. I knew already that it allows for a faster revving and that the rpms will drop faster then with a stock flywheel. I was actually planning to get a steel flywheel since I am not into drifting and the car for the most part will be street driven. I just kept seeing a handful of people always putting them down and never giving any solid reason why. I didn't want to see people being misinformed or steered away from buying something with no given negative reason why they shouldn't. This was not just on this forum, but I've noticed a lot of 240 owners saying it more then other makes/models. Also my friends old fc had a 8lb flywheel and I believe a stage 2 or 3 clutch and it was pretty decent. Definitely a noticeable difference.



240Smoke	Dec 30 2009, 10:53 AM Post #14
[]D [] []\/[] []D Posts: 4,419 Group: Members Member #52 Joined: March 8, 2009 My Ride: 1992 RPS13, 1992 240SX	They also make steel lightweight flywheels. Just so you know.



MasterTechE	Dec 30 2009, 01:35 PM Post #15
Can't Stop Posts: 77 Group: Members Member #132 Joined: July 2, 2009 Location: Phuckin Philly My Ride: 90 S13 Pro-IT race car project, 89 S13 Autocross car- daily driver	The best way to go is to send the crank, one rod , one piston, balancer and flywheel to the machine shop for lightening and balancing together. KA can run 8,000 rpm no problems



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