aluminum flywheel

[GoriLLa]

my new block is gonna have one in it, question is i drive a 2G FWD... is this gonna change launching my car a big difference?

 

[L2RTSiAWD]

You will have up the revs a little on the launch but you get used to it quickly.

 

[larryd]

ive heard of people having problems launching a FWD with a lightened flywheel but Im sure its nothing that you cant adjust for.

 

[Rob]

i have heard of them brakeing ..... I personal would stick with the stock fly wheel and have it shaved to half its weight and Pow a stronger flywheel no worries <just My 2 cents> did it to my last car what a difference =0)

 

[GRNDSM]

Originally posted by Rob
i have heard of them brakeing ..... I personal would stick with the stock fly wheel and have it shaved to half its weight and Pow a stronger flywheel no worries <just My 2 cents> did it to my last car what a difference =0)

This is the WORST possible option!!! Do not lighten stock FW! That drastically increases chances of it blowing up and destroying your car! If you must have a light weight clutch, get Fidenza or some similar FW.

I am not a big fan of light weight FWs on AWD cars, but I can't see it making things any worse on FWD (unless you are using HUGE slicks and need all that inertia).

Leon
RR

 

[NosLaser]

Thank you GRNDSM for pointing that out. I had just fallen to my knees in prayer for Rob so that when his flywheel explodes at 7K rpm, it doesn't decapitate him.

Regards,

 

[Blue97GST]

Originally posted by Rob
i have heard of them brakeing ..... I personal would stick with the stock fly wheel and have it shaved to half its weight and Pow a stronger flywheel no worries <just My 2 cents> did it to my last car what a difference =0)

you're misinformed dude. Never lighten a factory flywheel unless you want to blow up your engine. C'mon, everyone knows that.

 

[Zerocygnal]

By using a lighter flywheel you lose valuable driveline weight by decreasing the centrfical force that gives you torque that gives you that slammed back in your seat feeling. An alluminum flywheel would only be beneficial as it is not as prone to shattering like a cast steel flywheel. The only real signifigant difference is that your engine will rev faster..accomplishing nothing. As for safety the flywheel would be great if you planned on running it hard constantly. This is the same basis used when I was into racing Stangs years ago. Do NOT lighten the factory flywheel without a good life insurance agent and a complete will.

 

[LaserRST]

I was under the understanding that a lighter flywheel will spool the turbo quicker and add horsepower just by getting some weight off the crank. Am I misinformed?

 

[Zerocygnal]

That is correct, you will gain horsepower and the turbo is only spooling faster because the engine is reving faster. But that horsepower is useless unless it can be effeciently transferred to the drivetrain. The old saying "Put your weight into it" If there is less weight in the inertial force then it will not be transferred at an optimum level. Best analogy off the top of my head... "A 4G63 Engine is all modded out and now produces 600HP to the wheels. Car goes fast right? Okay so why can't we put this 600HP engine and put it in a 4000lb F350 Ford and get the same results? See what I'm getting at here? Horsepower is important don't get me wrong. But torque is what you are really after because that engine is not going to make the F350 hall balls because it doesn't have the torque involved that an 8cylinder is going to have because of the displacement and the weight of the crank, flywheel and pistons that drive it.

It would be alot like trying wipe your butt with a turd, not real effective for your desired outcome.

Hope this makes more sense....

 

[NosLaser]

....I was under the understanding that a lighter flywheel will spool the turbo quicker and add horsepower just by getting some weight off the crank. Am I misinformed?....

...That is correct, you will gain horsepower and the turbo is only spooling faster because the engine is reving faster....

That is INcorrect. Faster rpm does NOT mean faster spoolup. I have gone through this time and again. RPM does NOT spool a turbo. LOAD spools a turbo. A lighter flywheel will result in slightly slower spool-up as it will create less load on the engine. It's early, and I don't want to go into this further, but I'm sure I'll need to.

Regards,

 

[Taboo]

Originally posted by Zerocygnal
That is correct, you will gain horsepower and the turbo is only spooling faster because the engine is reving faster.

You will NOT gain any horsepower with aluminum or lightened flywheel. No matter if the flywheel is made of lead, styrofoam or concrete, the engine makes the same horspower. The only thing aluminum or lightened flywheel will do is reducing the load on the engine and allowing it to rev faster since less torque is required to accelerate the lighter flywheel. Less load results in less exhaust energy and consequently in slower turbo spool-up.

 

[AndyFL]

Makes revmatching for shifting easier, for guys who actually turn, and don't just 1/4 mile race. Heel-toeing is easier.

 

[MustGoFaster020]

Originally posted by Taboo

You will NOT gain any horsepower with aluminum or lightened flywheel. No matter if the flywheel is made of lead, styrofoam or concrete, the engine makes the same horspower. The only thing aluminum or lightened flywheel will do is reducing the load on the engine and allowing it to rev faster since less torque is required to accelerate the lighter flywheel. Less load results in less exhaust energy and consequently in slower turbo spool-up.

But, would it not reduce parasitic losses like a lightweight drive shaft? That was always my thoughts on it, the engine spends more of its hp accelerating the car not the flywheel, or am I just wrong?

 

[NosLaser]

...the engine spends more of its hp accelerating the car not the flywheel...

How does the car accelerate? You have to think of it on a very basic level. What do you think turns the engine's linear energy, into circular inertia that in turn turns the tranny, then the axles, and then the wheels? The Flywheel *IS* what accelerates the car. This is why many drag racers use a WEIGHTED flywheel, because when the trans brake is released, all that enery slams the tires and the car leaps out of the hole.

Regards,

 

[magecite]

ok i thought the fly wheel revs and drops revs faster witch enables you to shift faster thus faster accel.

 

[magecite]

i light fywheel that is

 

[set3422]

actually hardcore racers use heavier flywheel for better 60' time. Heavier flywheel can store more rotational momentum energy, hence this energy can transfer to mechanical energy for explosive launch.

 

[NosLaser]

...actually hardcore racers use heavier flywheel for better 60' time. Heavier flywheel can store more rotational momentum energy, hence this energy can transfer to mechanical energy for explosive launch....

You didn't read what I wrote 3 posts up did you?

Regards,

 

[magecite]

i think the fly whell is an iffy thing i herd what i explain as above where the faster revs alows you to shift/easyer that concept make sence then so does a weighted fly wheel witch makes sense, you can get tire better launces but slower or harder shifts but i'm going to make theories for each concept or whay i think any how.

heavy fly wheel = better launches and keeps rpms more stable but slower i would use on a low rpm car that doesn't have enouph horse power to keep the rpm

light flywheel = faster shifting, quicker revs less not as stable launches but i would use if i had mega horse power


well that's my concept

tell me what you think?

 

[magecite]

heavy fly wheel = better launches and keeps rpms more stable but slower i would use on a low "HP not rpm(correction please don't flame me for my spelling)" car that doesn't have enouph horse power to keep the rpm