u guys think Lightweight flywheels worth it?

[sepulchral]

I just purchased a Toda 10lb flywheel for the sr20det i plan to install

i should expect better throttle response, quicker revs up and down, better HP?

will it feel more torquey? you guys think it was worth getting?


toda is 10lbs, stock is 22lbs right?

is there alot of gain or r they just overrated?

im excited though :o

[nokuntrol]

depends i think...

Your RPM may drop too quickly which may not be a good thing for track use.

[kaje36]

one of the best mods I have made,.. makes the car feel alot more responcive, no rpm droping issues at all, no driving issues. if you are doing heavy drag you might not like it as much, but if you do anything else you will love it

[IGSDann]

No HP gain.
I believe there's better turbo spool.
Quicker reving up (big time) and down, making it harder on the street but you just need to adjust.
I would think not any more torquey, it's taking away some rotating mass so there is less weight pushing your wheels (if that makes sense?)

It's a good mod overall I would get one if I had the spare cash bush I have other priorities, I'd rather have a better clutch on a stock flywheel than the otherway around. I do know heavier flywheels hold their power a bit better.

[rps13sh]

LESS turbo lag! wo0t! i think its totally worth it.

[PinkPanther]

Like dann said, lightening your flywheel removes rotational mass; which in turn gives you faster reving and acceleration. What you lose is crankshaft balance, and because the flywheel is engineered to bring each piston from the end of its power stroke to its compression stroke, you lose smoothness of shifting and idle return.

[drift freaq]

ok speculators heres the full deal on lightened flywheels.
First off for track cars there quite nice because a track car does not care about bottom end torque but wants to stay in the rev band so the lighter the flywheel the more engine can be kept spinning in shorter amount of time.
Now let me explain why this is, basically your stock flywheel initiates inertial drag which actually gives you torque on the bottom end .
when you lighten the flywheel depending on how far you go you lower the inertial drag which like stated earlier causes the engine to rev up quicker and easier also causing a quicker rev down.
Now the problem that a lot of people do not realize when putting a lightened flywheel on a street engine is you go to light and you lose that bottom end torque as I mentioned earlier. I have seen this happen with Toda wheels on my friends SR . The toda wheel was a 9-10 flywheel . He was bummed by the loss of torque . Now when you got the engine spinning it was a blast but it was not ideal for street and yes it made the engine like a GSR engine. If your a Honda luvver than you will dig it . hahhahhahhaha
I used a lightened flywheel on a KA lightened to 16lbs and it was a great comprimise it was light enough to change the nature of the KA but not to light as to destroy my bottom end torque. If your running a SR on the street again I feel a 10lb wheel is too light. Mike Mamos from Clear Corners took his SR flywheel to the same place that I had do my KA flywheel and got it lightened to 16lbs for his Blacktop and it worked very well.
Thats the whole deal . sum it up Too light lose torque, too heavy drag on engine slower revs . Inbetween ideal.

[420sx]

i have it on my ka and id say theses better things to spend money on. worry about this if u upgrading ur clutch. not worth dropping the tranny for by itself.

[sepulchral]

drift freaq:

Do you even know what your talking about? most of sr's power is top end, i got this flywheel for sr20det.. everyone knows theres hardly any low end with a turbo car.. if the car can rev up faster generate exhaust gasses faster than the turbo will boost quicker, better response, that would help, not hurt it right? or is what i said inaccurate?

and if a flywhele is lighter you can put the power to the wheels quicker,

how the fuck would torque be any different with a lighter flywheel?

[tubedae86]

Depends on what you are wanting to do. AutoX and road race might be a good idea, but drift i would say otherwise, try getting something closer to stock weight. Makes more sense to carry that enertia while drifting does'nt it. Makes it more controlable.

[tubedae86]

Well since you think that lighter flywheels wont make torque and all the power is in the top end in an SR, then think about this: More torque off the line cause the power would be put to the wheels quicker. The lighter the flywheel the faster that the R's will go up. The lighter the flywheel, i guess might give you more bottom end response. Which what you want at bottom end is torque right, if you already get enough of a power band in higher RPM do to boost, maybe it will increase the power band all the way across. Quicker boost response at lower RPM will give you more torque response at lower RPM. Just depends on what you are wanting to do with your car.

[sepulchral]

yeah but is waht drift freaq said his opinion or the truth, i just dont understand how a lightened flywheel would take torque away, its just a flywheel

[drift freaq]

drift freaq:

Do you even know what your talking about? most of sr's power is top end, i got this flywheel for sr20det.. everyone knows theres hardly any low end with a turbo car.. if the car can rev up faster generate exhaust gasses faster than the turbo will boost quicker, better response, that would help, not hurt it right? or is what i said inaccurate?

and if a flywhele is lighter you can put the power to the wheels quicker,

how the fuck would torque be any different with a lighter flywheel?

yes, I have real world experience with this stuff. You just proved my point as well by saying most of the SR's power is top end which means a lightened flywheel will make your off the line time worse. tube has the idea but is a little off. A lightened flywheel on a SR will indeed put you up in your Horsepower torque band sooner . The thing is this a SR has limited bottom end torque to start with drag from the flywheel causes part of it. If you lighten the flywheel you will take away from that. Yes you will go up into the SR's normal HP/TQ band sooner but you will have to stay up there to make use of it. Which is why Road racers and Formula cars go with ultra light flywheels. Now if you put the lightened flywheel on the SR and keep your revs up you will feel the torque that is there at the mid range and top end but to make it offline the line quicker that way your going to have to dump your clutch at 3.5 to 4k . In a drag situation you want to be able to have power come on earlier than that. If you don't understand about inertial drag i.e. force effecting torque you need to take a few Physics classes

[Tygma]

Your going to burn up your clutch on the street if you have a lightened flywheel... your going to have to slip it a helluva lot more. keep it on the track, you wont see any noticeable gains as far as hp, or w/e. it just revs up quicker in neutral.

[Rownan]

Your going to burn up your clutch on the street if you have a lightened flywheel... your going to have to slip it a helluva lot more. keep it on the track, you wont see any noticeable gains as far as hp, or w/e. it just revs up quicker in neutral.

Wow are you wrong. :ugh:

Fidanza lightened flywheel has been the best mod I've done, and I track/drift the car regularly during the summer.

[RBS14]

lighter flywheel = response.

response = good.

looks like a winner to me. I've got a 12lb wheel on my ka and I love it. Can't wait till I can knife edge the crank and get ridiculous response. werd.

[axiomatik]

By installing a lightened flywheel, you won't see a decrease in low-end torque, the engine produces the same amount of torque regardless of what is bolted onto the crankshaft. However, that is not to say it won't affect launches. The purpose of a flywheel is to store rotational energy for times when the load on the engine quickly increases, such as starting up a hill or accelerating from a stop. When you accelerate from a stop, you go from using no energy to needing a lot, so some of the rotational energy stored in the flywheel is transferred to the wheels to help the engine accelerate the car. A lightened flywheel stores less energy. This has its advantages and disadvantages. On one hand, it is easier to spin, providing better response. On the other hand, it provides less energy when it is quickly needed, such as accelerating from a stop or right after up-shifting. Therefore, you will notice that your engine will bog down more easily. At low RPM's, the engine doesn't produce much power, so it relies on the assistance of the flyweheel to a much larger degree than at high RPM's, when the engine is producing a lot of power. This is why lightened flywheels are more beneficial in high-RPM applications. At high RPM's, the engine doesn't need the assistance of the flywheel as much to provide consistent power delivery, and you get the benefit of improved throttle response. The engine will rev more easily, and you should get a few horsepower out of it from reduced parasitic drivetrain losses, since the drivetrain can rev up more easily.

[sepulchral]

ok so two 240s with saem mods, sr20det

one has 10lb flywheel

one has 22lb stock flywheel

they launch, which 1 gets off the line first, which one wins the race to 100mph?

the stocker then the lighter?