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 Post subject: lightened flywheel
PostPosted: Fri Aug 03, 2007 3:06 am 
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TO4
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Joined: Mon Jun 26, 2006 1:43 pm
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Location: sydney,stclair
Car: 180sx
hey guys,

im planning on doing a 5-speed conversion on my 6speed fitted 180 in the very near future. i got the s14 turbo tailshaft, reconditioned 5speed box, clutch kit (inc spigget bushing, thurst bearing etc.) i just wanted to know if it was worth the extra money for a lightened flywheel? can you actually "feel" the difference with weight? what are peoples experinces with them?

cheers

michael

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PostPosted: Fri Aug 03, 2007 5:32 am 
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Joined: Mon Jul 16, 2007 12:18 am
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Location: Augusta, GA, USA
Car: 1996 240sx SE
I mostly noticed that rpm's climb and drop off much faster. Not a huge difference, but with only mild mods on my car I wasn't expecting any.


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PostPosted: Fri Aug 03, 2007 9:39 am 
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TO4
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Joined: Mon Jun 26, 2006 1:43 pm
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Location: sydney,stclair
Car: 180sx
did it make the clutch shudder more? is it worth goin lightened in your opinion?

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PostPosted: Fri Aug 03, 2007 8:25 pm 
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Joined: Mon Sep 08, 2003 11:21 pm
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Location: Sydney
Car: WGNC34,S14,AE86
what's the weight of the flywheel got to do with clutch shudder?

you will only get shudder if you have some form of mis-alignment in the clutch assembly. unless the flywheel is warped or wasn't put on to a clean,smooth surface and torqued up evenly,you're not going to get shudder.

if you put in a friction plate that had a solid (as in unsprung) centre where you previously had a sprung centre you'd notice more vibration on initial take up,but that's not clutch shudder as such.


lightened flywheels are great if you're planning to drive the car most of the time as opposed to just cruising around in it. the better response when shifting and on initial take off makes life a little easier. go too light though,and you're going to hate hill-starts...


Justin...

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PostPosted: Sat Aug 04, 2007 6:30 pm 
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Cant say I have noticed any huge difference with new clutch / pressure plate / flywheel which was about 2kgs lighter. Idles a slight bit lumper because of the reduced recipricating weight and the cams are a tiny bit more noticable. Little bit slower for the revs to drop when changing down without brake assistance. Might rev up slightly quicker, hard to tell because as soon as it hits boost I am reaching for the next gear.

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PostPosted: Mon Aug 06, 2007 8:31 pm 
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TO4
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Joined: Mon Jun 26, 2006 1:43 pm
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Location: sydney,stclair
Car: 180sx
i was just told that a lightened flywheel tends to shudder on initial take off

a bit more due to them losing inertia easily. i usually just drive my car

during the weekend, mostly spirited driving so i dont mind if i loose a

little bit of drivability.id probably end up goin the lightened flywheel

anyway.

cheers for the feedback guys :)

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PostPosted: Wed Aug 15, 2007 2:32 pm 
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Joined: Thu Jun 16, 2005 5:09 pm
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Location: At my desk
Car: 180SX
nah a lightened flywheel won't make the slightest difference if it is balanced properly. As fergo said an unsprung centre or brass padles may sometimes give a bit of a shudder but thats only if you don't get the take off right.
I find if I give my car a bit of stick and get some heat into the clutch the clutch bites like a bitch and is more likely to shudder then.

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PostPosted: Wed Aug 15, 2007 9:40 pm 
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Twin T51
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Joined: Mon Aug 13, 2007 4:39 pm
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Location: At your house =P
Car: 180sx RB26DETT
hey guys im pretty new at this but i had a awesome r32 GTR before with a lighten flywheel and the rpm climb on it was insane but if you do go too light you will lose tourqe, but with drift cars i have one on my 180 at the moment but its tuned for drft and not racing so i can only feel slightly faster rpm climb,

Hope this helps


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