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Should i install a lightened flywheel

Guest darrinspencer

By Guest darrinspencer,
in Suspension, braking, tyres and drivetrain

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skyzerr33 Grand Master

skyzerr33

Posted
Posted

i have the ogura unit same as rev210

it use to vibrate in 4th and 5th between 1500-2000rpm. I was told its a balance issue but i also tend to think it just took awhile longer for it to bed in as i don't get the vibration anymore.

and yes do it, response is awesome

rev210 Grand Master

rev210

Posted
Posted

I have no vibrations at all. I torqued the bolts up in proper 'star shaped' sequence to ensure the perfectly ballanced Ogura flywheel sat flush on the mounting point.

Craved,

Less acceleration up a hill? Rubbish! : A lightened flywheel equiped car will completely kill a car the same without a light flywheel. More so in the first few gears.

Bottom line is that the light flywheel equiped car out accelerates a standard flywheel equiped car up a hill or down a hill, into a headwind or going with the breaze. They are a dead heat off a cliff tho' (if your into that form of racing save your money).

The easy to stall part is because of the heavy clutch. I don't have a heavy clutch just a good 9 puck ceramic friction plate. Therefore no one has problems stalling my car.

Craved Grand Master

Craved

Posted
Posted

i agree with you rev210, no chance of less "acceleration"! however i did say momentum, thus in a high gear in lower revs up a hill the lighter flywheel will drop revs quicker! Especially in a full/heavy car!!! thats all i was saying!

Guest darrinspencer

Guest darrinspencer

Posted
Posted

just for everyone's knowledge

Direct Clutches in Brisbane 07 3862 2680

Can do a lightened flywheel that weighs 5kg for $440 retail.

compared to others that are heavier and cost a fair bit more, makes these great value.

they also do a clutch kit

2800lbs organic clutch plate rated at 350rwhp or 260rwkw for

$530 retail

i have decided to put both these in my car.

siksII Grand Master

siksII

Posted
Posted

I had a 'lightweight, cross drilled, balanced and machined' flywheel in my last car, i didnt get any vibration, and there was a definate performance increase...not a lot, but it made the car feel slightly sort of ligher...(more power i guess..)

the car also held speed better on a straight. ie. before it would slow down without pushing the accellerator a bit, but after you wouldnt have to push the pedal and it would hold speed.

Maybe you should find a cross-drilled one...apparently works sort of like cross drilled brakes, lessens the effect of a clutch overheating and slipping.

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by Richelieu

For piece of mind, billet alloy flywheels weigh in at less than 1 kg.

crap, a flywheel will not weigh less than 1 kg, a bike one maybe not a car tho.

i got a 4.8kg (ogura chrome molly) flywheel also and its makes a great difference in acceleration and i dont have any vibration problems. U will get vibration problems if u try lighten the stock flywheel.

riggaP Veteran

riggaP

Posted
Posted

I'm also considering a light weight flywheel but after speaking to perfomance shops etc I'm a little undecided, coz I want to keep everyday drivability.

Is there a severe decrease in bottom end torque? Apparently lightened flywheels are awesome above 3k rpm but suck for every day city driving?????

Altho siksII describes otherwise, I have also been informed that a lightweight flywheel will also cause the engine to drop revs a lot quicker when you back off the accelerator.

These 2 theories seem to make sense to me as less weight = less effort to make it move, but less weight = less momentum to keep it moving.

Guest INASNT

Guest INASNT

Posted
Posted
These 2 theories seem to make sense to me as less weight = less effort to make it move, but less weight = less momentum to keep it moving.

Thats right, my car revs much more nicely upto redline and i havent noticed any loss in low down torque.

Dont you hate when people give things bad reports when they would know shit about it or even driven a car with it??

Lunatic Dancer Collaborator

Lunatic Dancer

Posted
Posted

yeh....deceleration will be quicker..not the car but the engine speed......its pretty simple lightened flywheel = quicker accel, quicker decel...

probably have to clutch in bit sooner and city driving will need bit more throttle than usual....(bumper 2 bumper)

Steve Grand Master

Steve

Posted
Posted
Originally posted by Richelieu

http://www.aussiefrogs.com/articles/406sup...os/photo_4.html

third coloum, halfway down, says flywheel weighs in at less than 500g.

What the???? You are quoting an article about a touring car with an aluminium flywheel, that requires to be shimmed up every race to maintain contact, with a street driveable alloy flywheel that is designed to not need shimming???

you also stated "For piece of mind, billet alloy flywheels weigh in at less than 1 kg."

I didnt see that anywhere in the article no reference to billet or to alloy or to 1kg.

In case you havent noticed, this thread is about lightened flywheels for a skyline - find one that is available in alloy under 1kg designed for use on the street - you wont. Ogura is the lightest I have seen, and it weighs 4.8kg.

Guest INASNT

Guest INASNT

Posted
Posted
Originally posted by Richelieu

http://www.aussiefrogs.com/articles/406sup...os/photo_4.html

third coloum, halfway down, says flywheel weighs in at less than 500g.

and that article proves what? do u drive a touring car on the road and pull the flywheel out everyday??

EnricoPalazzo Grand Master

EnricoPalazzo

Posted
Posted

Ok guys ill try explain how the lightened flywheel works in laymans terms...

Lets say u are going to push a box on the ground. If u have a light box, it is easier to push and quicker. If the box is heavy, it takes more time.

This can be related with the engine and flywheel. If the flywheel is light, the engine can get to higher RPM quicker, and if the flywheel is stock/ heavy, it takes the engine longer to get to higher RPM.

What this all means is that you can accelerate quicker due the the engine being able to rev quicker. This is the principle reason that people change flyhweels to lightened items. The only downside is that because the engine can increase in revs quicker, it also decreases in revs quicker.

Hope that makes sense to those confused.

Richelieu Explorer

Richelieu

Posted
Posted
and that article proves what? do u drive a touring car on the road and pull the flywheel out everyday??
find one that is available in alloy under 1kg designed for use on the street - you wont. Ogura is the lightest I have seen, and it weighs 4.8kg.

Fair enough. You guys are right.

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