Gains from clutch and flywheel??

chanluder said:

no hp and tq gains! just faster rev and nice grip.

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mike_sho said:

I SWEAR. I hate flywheel talk. Dont want to be rude but 75% of the people have no clue what they are talking about or are just quoting off others who are completely wrong.

One no , you dont want to waste money on a flywheel.....only buy that when you really have nothing else to get. Spend your money on real power adders.

Also use the search button , we have beaten this issue to death one to many times. Also hopefully youll find my post on the issue. Ive had around 4flywheels. All different weights. I know what they do technically....I also have my own personal opinions on a few different kinds and weights....and they coinside with the technical aspect of things...(means I know its true)

Two , as to what many people still believe. No they do not make power. Your engine is still rated the same hp , there is no new fuel , no new air , no extra spark thus no hp. Some believe torque can come from a flywheel , but there has been NO REAL supportive evidence that they do anything....BUT.

They do one thing , change the dynamics and application of the car. If you plan on stopping and going like a normal street car or drag car then flywheel is a no no. If your car is going to become like an SCCA , on course, never go below 5k rpms kinda car then yes there ok.

Driveability goes down bigtime the lighter you go , A FLYWHEEL simply stores energy.... You remove that youll be revving higher to get your car going from a dead start , because you need to spin the lighter weight to get the same weight you going. So more clutch wear. Also rev matching becomes tricky , as well as launching because. Revs go up and down faster...so instead of a rev up and kinda watch it hang , youll be blipping it because it shoots up and itll drop like a rock....

So you will basically have to relearn driving your car....All for what. Nothing , you changed the dynamics and youve made your based on what application you probably unknownling changed it too.

Also really fast 10 second honda cars actually add weight to their flywheel......(something to think about)

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chanluder said:

never knew that! now i know....

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CRXtc said:

i agree with you mike but IME i have had no problems with my 9LB jun flywheel and i dont have to rev to 2000 to get it goin.......

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mike_sho said:

Hhehe , know why its harder to chirp 3rd. Less weight/energy to move around and use.

Also here is one for the technical books.

It kinda explains how a flywheel works. If your smart itll explain a lot of what "I" said.

Lets say you have a car with a lighter weight flywheel , if it went up a hill , and the exact same car with heavier flywheel went up the same hill.....the heavier will go up the hill faster.

Then downhill the lighter flywheel will go faster and and heavier will go slower. So at the end of the hill once they get back on the straight.....the cars will be at the EXACT same position.

So again power isnt changed , just the way you lay it down , you change dynamics.

Also launching is harder @ a track. WHY , because you have to try to get a good launch. You can bog easily , then spin like crazy from the easy rev. Also if you dont really know how to drive or know your car , yeah it might seem all around easier to work with. But you dont notice or probably even cringe when revving over 2k to get the car going. I let out at around 1200rpm and my car takes right off...lets see you flywheel owners do that without the car bucking like a horse....

Also why do you think honda spends millions on cars for engineering , and then why would they like to WASTE WEIGHT AND MONEY ON Making overly heavy flywheels , when its as simple as removing weight to make power? Well because it isnt , honda has to spend more money to buy more metal , to make our heavier flywheels. WHY? Because they work better.

No honda knew what there doing. They would love to use less weight in a flywheel....but know its too important to drop.

Take a look at the integra type-r , its got a 15lb flywheel , stock is 18lbs i think. Only 3lbs were shaved and really its only because the car has an insane redline and it never really has to worry about launches... [/QUOTE

the fact is its for fuel economy. honda uses lighter flwheels in their faster cars. under your theory the v6 cars wouldnt need as much flwheel because they have the torque and rotational mass but they dont. it is to store energy and help to keep the engine balanced and rotating one way. take a flywheel off of an engine and then try to rev on it. doesnt sound or feel very good. ill admit my clutchmasters aluminum flywheel took a while to get used to but it was worth it. also why do dirt bikes weight their flywheels ? because it slows down their revs and keeps the surge of power from flipping them . look in any dirtbike magazine and you will see flywheel weights for this purpose. now to the law of enrtia.

Lesson 1: Newton's Laws of Motion
Inertia and Mass
Newton's first law of motion states that "An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force." Objects "tend to keep on doing what they're doing." In fact, it is the natural tendency of objects to resist changes in their state of motion. This tendency to resist changes in their state of motion is described as inertia.


Inertia = the resistance an object has to a change in its state of motion.

why have magazines such as car craft and hot rod subscribed to the idea that lightening a flywheel will make a car faster? Why do people get so worked up about 20 inch wheels on performance hondas? rotational enertia. as you move weight to the outside of a sphere it makes it harder to accelerate it. why do some racers weight their flywheels because they use huge slicks and their cars will either bog down or spin at launch so they have to. but if you took traction out of the equation and the fact that these are fwd cars which are tricky as hell to be consistent you would have to come to the conclusion that rotational weight adds up and slows you down. and some of these cars make more power than they can possibly use add that to the torque multiplication provided by the honda transmissions low first gear and final drive and you have wheel spin. my final argument is this my neighbors mustang would beat my car by almost a car length after just my clutch and flywheel were added to the equation why did i win all the time. because if you rev faster your wheels move faster and your car moves faster. if heavier flywheels were beter the type r would have one. the flywheel weight doesnt have anything to do with the revs the additional counterwieghts on the r do. the flywheel allows the r to accelerate faster and was put there to do that. the r was designed without the ususal noise vibration and harshness formula that honda usually subscribes to hence no sound deadening and some years no ac, single stage manifold , stiff suspension etc. and the light flywheel was another compromise performance versus refinement. the r is not refined it is very much a race oriented car.

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CRXtc said:

this is true.......top end speed will go down with a lighter flywheel due to less inertia.........

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