im doing an all motor b20vtec build and every body always tells me to stay with a stock flywhell idk whats the hype on going with a lighter flywheel just as long as its not to light..tell me what yall think

 

There will will be people that say stay with a stock flywheel, then you get your group that loves their 7 pound flywheel. It all depends on what you want to get out of your car. All out drag or daily driver? From what I hear it is a bit hard to launch with a lighter flywheel, but most say they learn how and they love it after that. I think there is some advantage to a lighter flywheel. If not why would Honda lighten the Type R flywheel? I wanted something in the middle. I bought a ITR flywheel. Weights in at 15.25 pounds after I resurfaced it.

 

What is the benefit of lighter wheels?

 

Well there are a decent amount of benefits. The lighter flywheel allows for less rotating mass, whichs lets the engine rev more "freely" and faster. It is also easier to rev match as well. This is because it allows the engine to transfer more power to the drivetrain with less energy expended, which in turn also puts less stress on the drivetrain.(less heat generated=lesswear) If my math is correct given a 6-8in flywheel radius, removing 10lbs off of the flywheel is similar to removing 70-100 lbs from your car. But the benefits decrease when in higher gears in proportion to whatever the ratio is. But because this throws off the engines dampining the lighter you go it feels more "lumpy". If anyone has any better info feel free fix it. /

 

and yes im building an full out drag car...how would it effect me reving high

 

you need to be more specific, i think i already answered your question. although it doesnt give you more horsepower it allows more power to make it to the wheels of the car. a lighter flywheel allows the engine work less to produce the torque needed to move your car. does this answer your question? im not really sure what you are asking.

 

Less rotating mass is always a good thing in a drag car.. It takes less hp to turn a lighter wheel. So in turn you are freeing up some hp. This is an argument that will last forever though.. the extra inertia that a heavy wheel stores some people say they prefer it.. Although. Getting the car out of the hole, people say you need a heavier flywheel... But then you have to drag that weight with you all the way down the track. Once the car is moving, there is no need for the added weight.. My car runs a 6lb flywheel and I am still getting 1.80's 60ft's in a little 1.5. Would the heavier wheel help my 60ft.? maybe. But it would probably hurt my E.T. In the N/A world, every ounce of weight saved makes all the difference.

 

lighter weight= fast rev & fast rev drop.

 

good info but how would a heavyer flywheel give you a better 60ft if it takes more power to turn the wheels vs using a lighter flywheel were your able to but more power to the ground

 

Yes . You are able to put more power to the ground. But some people will tell you that the rpm's will drop faster so you are not making the power to get to the 60ft as fast. Where as the heavier flywheel will keep you moving. But once you get up to speed, you have to carry that extra weight with you. In drag racing, you need to get to the end first. Like I said. In the N/A world, every ounce counts..

 

True! I meant to add that in the first post.

 

No worries.... I am not in here to degrade anyone at all.. Just like to educate the ones that want it...

 

true story, knowledge is good to spread to the noobs. lol. good addition btw.

 

The reason it effects 60' time is because the mass of the flywheel stores energy on the start line. A heavier flywheel will store more energy when your hodling your launch rpm at the light. Once you drop the clutch, all that energy is instantly let loose on the wheels.

A Heavy flywheel with too much energy being let loose all at once can cause wheel spin or even break axles. A flywheel with too little mass requires more throttle input & can cause bogging if your not prepared. AS you can see there is a necessary balance. These same effects also apply between shifts....

On the street, a light flywheel will make driving more difficult when using AC. There will be a much greater difference in throttle application when leaving a stop light when the compressor is on vs when it's off...

 

your idle also can get loopy if you are drawing just enough power that the car doesn't idle up. since i went to a 7lb wheel if i have the lights on and am bumping the stereo i can get the idle loopy. flip on the heater and it idles up & goes away.

 

Diddo

 

just get a 12lbs one. right in the middle...not too lite...not too heavy. thats what i'm doing. act street lite goes for 200 new.

 

call or go to innovative tuning's website, its here in buffalo,ny. They sell them for 189.

 

yea i also have a streetlite, 12lbs is the best of both worlds I think. Got a great deal from TH Motorsports.

 

Yeah, I got a 8lb flywheel and IMO for daily driving I think it plain sucks a**, because Im always having to throttle up abit while lightly feathering the cluch to get going from a complete stop.Once I get going acceleration is pretty good, but I think I'd rather change it for 12lb when I start revamping a few things with my motor and drivetrain in the coming months.

 

thanks every one

 

LMFAO!