I never really liked light flywheels on turbo cars. Of course lighter is almost always better for acceleration, but driving on the street and having to flat foot shift is not the most fun thing...

On an inertia dyno it will show a bit of hp gain but not all of them are.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gringotegra &raquo;</TD></TR><TR><TD CLASS="quote">

i will have to say i can agree with that statement!!!! since i have changed my flywheel i have noticed it builds boost faster!!</TD></TR></TABLE>

At idle?

 

sorry let me refraise that...it spools up faster...before with the lighter flywheel i would get full boost in 5th at around 4000rpm...now by 3800rpm i have full boost..if that makes any sence...but i still say my car "Feels slower"...as soon as i take it to the track i will get some hard evidence..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civickid03 &raquo;</TD></TR><TR><TD CLASS="quote">I dont think a lightened flywheel would yield many more/less hp in your dyno gear (4th) but I have heard that a heavier flywheel builds boost slightly faster than a lightened due to increased load on the engine.</TD></TR></TABLE>

I can also make boost at 2000 rpm in fifth gear but the car sure doesn't accelerate very fast.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gringotegra &raquo;</TD></TR><TR><TD CLASS="quote">as soon as i take it to the track i will get some hard evidence..</TD></TR></TABLE>

I think the only way someone can get hard evidence is to datalog a few things on a dyno.

The only reason why anyone would feel a difference is if they didn't adjust their driving style for a lighter flywheel.

If you take shifting out of the equation it's like saying that using heavier wheels will build boost faster..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point2 &raquo;</TD></TR><TR><TD CLASS="quote">

I think the only way someone can get hard evidence is to datalog a few things on a dyno.

The only reason why anyone would feel a difference is if they didn't adjust their driving style for a lighter flywheel.

If you take shifting out of the equation it's like saying that using heavier wheels will build boost faster.. </TD></TR></TABLE>

well i guess i am not answering the question the post is asking...i guess i need to adjust my driving stye for the heaver flywheel...all i was stating eariler about evidence was i have alot of timeslips at the track with the lighter flywheel...track times are a way in my opinion a way to figure out alot of things about a car like horsepower...seeing that nothing else has changed on my car other than the flywheel i think it would be a good test to see if it is indeed faster with a lighter flytheel...hopefully the track is close to the same conditions they were before...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NJIN BUILDR &raquo;</TD></TR><TR><TD CLASS="quote">Sorry I missed that "50 hp" from Legion.</TD></TR></TABLE>

Zex_cool posted something outrageously stupid, so I posted "50whp gains" to mock him. That obviously went over his head.


This thread is really getting sad. The OP asked a simple question: "Will installing a lighter flywheel make me lose torque?" And there was a simple answer: "No, you will gain torque." Granted, it won't affect peak numbers, but the flywheel has less inertia and will therefore transmit more to the ground during acceleration. It takes energy to spin a flywheel up to speed - that's energy being robbed before it gets to your wheels.

It doesn't seem like a brain-busting concept to me, but apparently nobody wants to listen. It's no wonder the import community is the laughing stock of the automotive world. I'm done with this thread. If you don't want to be faster, that's fine. I'm certainly not going to beg to make the competition faster.

 

how fast are you with your supper light flywheel again ?? imports arnt the laughing stock its idiots like yourself that make imports look bad. leave please. thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zex_cool &raquo;</TD></TR><TR><TD CLASS="quote">how fast are you with your supper light flywheel again ?? imports arnt the laughing stock its idiots like yourself that make imports look bad. leave please. thanks. </TD></TR></TABLE>

stop this seriously...

i want a 90 pound flywheel for my car this season... THAT SHIZT WILL BE MAD QUICK IN VTAK


light flywheels here... stocks are ok, but they dont have a place in any "performance or real race car"

 

You really don't have to shift faster at all driving around town w a light fly.. just blip the gas in between shifts and rev match it. I do this every day at over 400hp w a 9lbs fly.

Some times its best to take ur nuts out of ur purse and learn how to drive your money pit and deal with the ups and downs associated with making these economy cars do things that they were never designed to do.

No offense though..
dk

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zex_cool &raquo;</TD></TR><TR><TD CLASS="quote">
not to mention that it throws off your entire engine balance which you dont want.
</TD></TR></TABLE>
care to explain how a lightened flywheel throws off your engine's balance? assuming the flywheel itself is balanced of course....

and for those interested in knowing what exactly is going on when you do this, here is a good read: http://www.geocities.com/ae82power/flywheel.html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adrian1281 &raquo;</TD></TR><TR><TD CLASS="quote">
care to explain how a lightened flywheel throws off your engine's balance? assuming the flywheel itself is balanced of course....

and for those interested in knowing what exactly is going on when you do this, here is a good read: http://www.geocities.com/ae82power/flywheel.html</TD></TR></TABLE>

i doubt they would understand anything that can be proven scientifically, you have to say it will help your car be mad fast yo!! and they will follow

 

Wow, I post with a loaded question then go away for the weekend and come back to this. As an engineer, I am not surprised that people can't fathom that reduced inertia will improve performance; however, I am dismayed that rather than learning from more knowledgeable members, they will post nonsense that will more than likely confuse and misinform people who stumble into a thread like this in the future.

Since some people have already posted educated responses, I will only post two points that bear repeating:
-if you have difficulty driving a car with a lightweight flywheel, you need to relearn how to drive.
-if you can't understand simple physics/dynamics, you may want to get off honda-tech and use some of your time to get an education.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by street_accord94 &raquo;</TD></TR><TR><TD CLASS="quote">Wow, I post with a loaded question then go away for the weekend and come back to this. As an engineer, I am not surprised that people can't fathom that reduced inertia will improve performance; however, I am dismayed that rather than learning from more knowledgeable members, they will post nonsense that will more than likely confuse and misinform people who stumble into a thread like this in the future.

Since some people have already posted educated responses, I will only post two points that bear repeating:
-if you have difficulty driving a car with a lightweight flywheel, you need to relearn how to drive.
-if you can't understand simple physics/dynamics, you may want to get off honda-tech and use some of your time to get an education.</TD></TR></TABLE>

as an engineering student I also agree with this, alot of people in this thread are arguing without enough knowledge of the physics of the subject.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Legion &raquo;</TD></TR><TR><TD CLASS="quote">

BULL. ****. Granted 7.5lbs is insanely light, but you just have to shift faster.


</TD></TR></TABLE>


My car is a street car.
and everyday you dont want to drive like you are racing.

i dont see the point in a light flywheel in a TURBO car.

for a NATURALLY ASPIRATED car, by all means go ahead.... every 1whp counts.

 

and for a FACT....
when my car was NA.
Going UPHLL.... with the lightened flywheel, my car WAS slower.
with the OEM, up hill IS ALOT faster.
FACT

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16a4 &raquo;</TD></TR><TR><TD CLASS="quote">and for a FACT....
when my car was NA.
Going UPHLL.... with the lightened flywheel, my car WAS slower.
with the OEM, up hill IS ALOT faster.
FACT</TD></TR></TABLE>

I've been to Florida and there are no hills.

 

some days I wish there was a way to ban ones self from honda-tech.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NJIN BUILDR &raquo;</TD></TR><TR><TD CLASS="quote">

I've been to Florida and there are no hills.</TD></TR></TABLE>

LOL...well there's bridges and overpasses and stuff...

i'm running a stock flywheel on my boosted gsr now, but i used to have an 11lb one on my last one. And like someone else said, that was probably the best mod i did to my car besides going turbo. Soon as the clutch goes on this car best believe i'm getting another lightweight flywheel.

this is my understanding on the flywheel thing...

lightening the flywheel in a nutshell basically allows your engine to climb and drop rpms faster because there's less weight to spin (rotational mass). the upside to this is of course when you step on the gas the rpms climb quicker allowing you to reach the sweet spot of your powerband faster (obivously more important for NA guys but not as big a deal to turbo guys cuz our powerbands are usually fatter)

the downside is that while shifting or when you come off the gas, the engine will lose rpms just as quickly causing you to decelerate (lose speed faster) - essentially the car doesn't hold its momentum as well.

here's a quick physics lesson - momentum is a definition of how the car maintains a given speed. the more momentum, the harder the car is to accelerate or decelerate. and of course the less momentum, the easier it is:

momentum = mass (weight of the flywheel) * velocity (speed of the car)

obviously the soccer moms that honda designs their cars for would rather not have the car decelerating too quick when they come off the gas or granny shift. they don't mind the car accelerating a little more slowly as a result. adding extra mass to the flywheel increases the momentum of the car, making it a little bit harder to speed it up or slow it down, which basically equates to a SMOOTHER ride.

and vice-versa for us - everyone here is trying to make their cars faster. i for one don't mind having to shift a little bit faster or a less "smooth" ride if it means when i'm ready to get on it, my car will speed up faster - boosted or not. if my girlfriend doesnt like it she can WALK. lol. i think 11lbs is great for a street car, lighter if you track it regularly. that's a matter of opinion though. either way it doesn't take long at all to get used to it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by trini-gsr &raquo;</TD></TR><TR><TD CLASS="quote">
LOL...well there's bridges and overpasses and stuff...
</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16a4 &raquo;</TD></TR><TR><TD CLASS="quote">
My car is a street car.
and everyday you dont want to drive like you are racing.</TD></TR></TABLE>


I've been using an 8lb flywheel for years on my daily driver. It drives like a normal car, even when I have to get up at 6am and I'm driving half asleep.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">i dont see the point in a light flywheel in a TURBO car.</TD></TR></TABLE>

We get it, you're an idiot. Point made. Stop reiterating.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16a4 &raquo;</TD></TR><TR><TD CLASS="quote">and for a FACT....
when my car was NA.
Going UPHLL.... with the lightened flywheel, my car WAS slower.
with the OEM, up hill IS ALOT faster.
FACT</TD></TR></TABLE>

We get it, you're an idiot. Point made. Stop reiterating.

 

I once put a flux capacitor on my car. FACT. Once 5th gear vtec hit, I went back in time. FACT. I traveled back to 1862 and partied with Abraham Lincoln. FACT.

And you know it's true, because I put FACT everywhere. It's undeniable.

 

your an idiot

we are all entitled to our opinions.

i think its past your bedtime,
go pee pee and hit your bed son.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16a4 &raquo;</TD></TR><TR><TD CLASS="quote">your an idiot</TD></TR></TABLE>

Grammatical errors are yummy.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">we are all entitled to our opinions.</TD></TR></TABLE>

So which is it - an opinion or a (capitalized) FACT?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16a4 &raquo;</TD></TR><TR><TD CLASS="quote">and for a FACT....
when my car was NA.
Going UPHLL.... with the lightened flywheel, my car WAS slower.
with the OEM, up hill IS ALOT faster.
FACT</TD></TR></TABLE>

Doesn't look like an opinion to me. You stated a physical impossibility as a FACT, hence my smiting you

 

For the sake of anyone who dredges this thread up in the future in an attempt to find factual answers, I hope you realize that it is PHYSICALLY IMPOSSIBLE FOR A LIGHTWEIGHT FLYWHEEL TO MAKE YOU SLOWER.

It can ONLY MAKE YOU FASTER. Hopefully you (speaking to my future audience here) can grasp the simple concept that mass requires energy to accelerate. Less mass requires less energy, hence more power to the wheels and a faster car.