hey everyone i would like to get more power and was thinking bout a new flywheel or something casue someone told me if i put one of those on there it would give me faster revs tell me what you think thanks.

 

Faster revs, and Hella better for rev matching, but it's not much for any hp gain.

 

i agree with that guy ^. its not going to do much for you hp wise...get a new clutch and flywheel combo and youll improve accel and time...

 

Get a better tranny.

 

I read that if your flywheel is too light, you actually lose inertia torque. I would just go for a 12lb flywheel. But don't expect any hp or torque gains.

 

every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp..i know it sounds crazy but its very true. I have a honda horsepower book and it even says so

so if you lost 10 pounds at the fly wheel then you basically gained 25whp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted_hatch &raquo;</TD></TR><TR><TD CLASS="quote">every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp..i know it sounds crazy but its very true. I have a honda horsepower book and it even says so

so if you lost 10 pounds at the fly wheel then you basically gained 25whp </TD></TR></TABLE>

Tell me your joking...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted_hatch &raquo;</TD></TR><TR><TD CLASS="quote">every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp..i know it sounds crazy but its very true. I have a honda horsepower book and it even says so

so if you lost 10 pounds at the fly wheel then you basically gained 25whp </TD></TR></TABLE>

But if you lots 10 pounds you would have no Flywheel, or almost no flywheel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted_hatch &raquo;</TD></TR><TR><TD CLASS="quote">every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp..i know it sounds crazy but its very true. I have a honda horsepower book and it even says so

so if you lost 10 pounds at the fly wheel then you basically gained 25whp </TD></TR></TABLE>
Hey man, I have some high quality ocean front property for real cheap in the Nashville area. Let me know if your interested.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SlammedDC2 &raquo;</TD></TR><TR><TD CLASS="quote">Hey man, I have some high quality ocean front property for real cheap in the Nashville area. Let me know if your interested.</TD></TR></TABLE>

ha ha ha ha ha ha

 

hey actually this is very true.. its kinda like unsprung weight.. i dont know if the numbers are right.. but i know that taking off 5 pounds off wheels, lug nuts, axles, flywheel, etc.. is like taking off 15 pounds on the body of a car...same principle... i think....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by willywong86 &raquo;</TD></TR><TR><TD CLASS="quote">hey actually this is very true.. its kinda like unsprung weight.. i dont know if the numbers are right.. but i know that taking off 5 pounds off wheels, lug nuts, axles, flywheel, etc.. is like taking off 15 pounds on the body of a car...same principle... i think....</TD></TR></TABLE>

What if I go on the subway diet and lose 10-20lbs?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Smash03 &raquo;</TD></TR><TR><TD CLASS="quote">I read that if your flywheel is too light, you actually lose inertia torque. I would just go for a 12lb flywheel. But don't expect any hp or torque gains.</TD></TR></TABLE>

That's also bs, I have an 8lb fidanza flywheel, no problems what so ever,
Don't listen to any of the **** that people say with them being too Light.

 

i heard its every 50bls you gain back .5HP.

if it was every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp i would be owning fat guys in STi's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted_hatch &raquo;</TD></TR><TR><TD CLASS="quote">every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp..i know it sounds crazy but its very true. I have a honda horsepower book and it even says so

so if you lost 10 pounds at the fly wheel then you basically gained 25whp </TD></TR></TABLE>
.
if this is ture, you dont gain any horse power, you just free it up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schrader &raquo;</TD></TR><TR><TD CLASS="quote">But if you lots 10 pounds you would have no Flywheel, or almost no flywheel. </TD></TR></TABLE>

youd have like a 8 lb Flywheel if you dropped 10lbs off.

i vote a ITR flywheel

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ..::91TEG-G2::.. &raquo;</TD></TR><TR><TD CLASS="quote">
.
if this is ture, you dont gain any horse power, you just free it up </TD></TR></TABLE>

yea, thats how i see it as well, such as eliminating AC and power steering

and less weight the motor must spin is a benefit

but i have heard stories about flywheel's under 10 lbs feel funny while ripping through gears when youre smashing because it doesnt keep momentum or some crap like that

 

ive read it in my honda horsepower magazines and i have a JDM vid and it has subtitles in english and it says "for every 1 bound removed off this flywheel will equal about 2.4-2.7whp"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted_hatch &raquo;</TD></TR><TR><TD CLASS="quote">ive read it in my honda horsepower magazines and i have a JDM vid and it has subtitles in english and it says "for every 1 bound removed off this flywheel will equal about 2.4-2.7whp" </TD></TR></TABLE>

yes, but the engine doesnt get stronger....you just free up power that doesnt need to be used to turn the heavier flywheel

 

I plan on installing my Fidenza flywheel (7.5lbs) in the next couple of months, along with the quaife LSD and exedy clutch. So I'll let everyone know how it fells. IMO I think it just frees up power not create it.

 

i got an ACT 11lb flywheel and new Exedy 3pk.....if the numbers above are correct, i gained like 18whp from that......i dont know if that's necessarily correct is it??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FlatBlackTeg &raquo;</TD></TR><TR><TD CLASS="quote">Faster revs, and Hella better for rev matching, but it's not much for any hp gain.</TD></TR></TABLE>


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b00sted_hatch &raquo;</TD></TR><TR><TD CLASS="quote">every 1 pound removed from rotational/parasitic mass equals about 2.4-2.7 whp..i know it sounds crazy but its very true. I have a honda horsepower book and it even says so so if you lost 10 pounds at the fly wheel then you basically gained 25whp </TD></TR></TABLE> ive heard something similiar to this but ill guarentee you your engine is not going to gain 25whp

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by willywong86 &raquo;</TD></TR><TR><TD CLASS="quote">hey actually this is very true.. its kinda like unsprung weight.. i dont know if the numbers are right.. but i know that taking off 5 pounds off wheels, lug nuts, axles, flywheel, etc.. is like taking off 15 pounds on the body of a car...same principle... i think....</TD></TR></TABLE> lol man you need to research a little more
also: if you remove your lug nuts, dont expect the wheels to stay on long


imo: theres no disadvantage to having a lightened flywheel, if there were problems with having a 8lb flywheel then there probably wouldnt be any to buy.

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

What if I go on the subway diet and lose 10-20lbs?

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

 

http://www.team-integra.net/fo...earch

http://www.se-r.net/engine/light_flywheels.html


Q: Many people say that lightweight flywheels can save power and increase performances (eg. on 300ZXTT: "Each lb. Of mass taken off the crank/eccentric shaft is worth approximately 2.7 hp"). OK, I know that the lower the weight of the car, the best the ratio weight/power. But with lightweight flywheels, you can save only a few pounds and the car is around 3000 pounds so the driving performances should be very low... I read that rotating mass has more important impact than others. Is that right? And why?

Sarah: I should have never ditched those physics lectures back in college. Although a lightened flywheel does not increase horsepower, you've got the right idea- decreasing mass and rotational inertia will free up power quicker. Inertia is the property of matter resisting a change in motion. The flywheel resists a change in the speed of rotation of the driveshaft, consuming power during acceleration. A flywheel has mass and inertia. It takes torque, the rotational equivalent of force, to start and stop its turning. The rotational equivalent of mass is the moment of inertia. The more mass an object is, the harder it is to get it to start or stop moving. Moment of inertia depends on the mass of an object and where it is concentrated close to the axis of rotation. Think of the flywheel as a disc. This oversimplifies the properties of a flywheel since a flywheel is not a homogenous mass but thicker in the center than the edges. However, it will make calculations easier to understand and still offers a good estimate. The formula for the moment of inertia, I, is: I=0.5mr^2. Holding r constant since the size of the flywheel is not changing you'll notice mass has a large effect on the moment of inertia. Substitute rotational equivalents for straight-line motion variables in Newton's second law of rotation to determine the amount of force exerted on an object. Use torque for force, moment of inertia for mass, and angular acceleration for acceleration.

If moment of moment of inertia (mass) decreases, less torque is needed to keep the acceleration variable the same. If the same torque is applied, the angular acceleration increases. Now that you've gotten the Physics 101 lecture, let's take this to a more advanced level course. Let's apply this to the 1993 Sentra which weighs about 2,500 pounds and makes about 140 horsepower at 6400 rpm in 3rd gear. Using 3rd gear and final drive ratios, the 3rd gear wheel rpm is 1192 (6400 rpm x 1.286 3rd gear ratio x 4.176 final gear ratio). Calculating for 3rd gear torque and assuming a stock tire radius of 175mm (0.574 feet), this gives a forward rate of acceleration of 0.43 g, or about 13.8 ft/sec^2. Angular acceleration, or how fast the rate of rotation of the flywheel is changing, is 24.1 rad/sec^2 (linear acceleration/tire radius). Multiplying this by 3rd gear ratio and by the final drive ratio, the flywheel is accelerating at 129.4 rads/sec^2. The stock flywheel weighs 18 pounds and is about 0.365 feet in radius, giving a moment of inertia of 0.0434. Flywheel torque is the flywheel angular acceleration times the moment of inertia, or 4.8 ft/lbs and the power consumed by the flywheel is torque times angular velocity, or 5.86 hp. Changing the flywheel weight to a 9 pound lightened flywheel from Unorthodox Racing while holding all other variables constant, the flywheel only consumes 3 hp, freeing up 3 hp in 3rd gear. A lightened flywheel frees up more power in the lower gears since it is harder to begin momentum that to continue it. Solving for 1st and 2nd gears, the lightened flywheel frees up 16 hp in 1st and 6 hp in 2nd. Gains in the higher gears are negligible, 1.7 hp in 4th and 1 hp in 5th.

A car with a heavier stock flywheel will obviously benefit more from a lightened one. The Spec V flywheel weighs in at almost 29 pounds, a heavyweight in the Nissan lineup. Switching to the 12 pound Jim Wolf Technologies flywheel will free up 16 hp in 2nd, 7 hp in 3rd, 4 hp in 4th, 2.5 hp in 5th, and 2 hp in 6th. Amazing, the stock QR flywheel consumes 50 hp more than the lightenend one in 1st gear! It revs happier and has more pickup than a Playboy bunny at a Wall Street bar during happy hour! This engine is already a torque monster so invest in sticky tires to make the most traction of that power.

Since a flywheel absorbs some of the energy generated by the engine during acceleration, lightening the flywheel increases the torque on the driveshaft since less energy is used to accelerate it and more is used to turn the drivewheels. Keep in mind it's not just how much mass is removed from the flywheel but where it is removed. The concentration of mass affects how much resistance the flywheel offers to changing rpm. Rotational inertia increases with the square of the distance of the axis or rotation. Removing weight on the edge of the flywheel is 4 times as good as from the midpoint between the center and the edge. Finally, a flywheel will not show much of a gain in horsepower on a dyno because it doesn't increase fuel or air and can't increase horsepower. Remember, you're not actually improving your car's power, just how quickly it can get to that power. An inertial dyno will show gains by the engine reaching a predetermined rpm sooner with a lightened flywheel.

 

close ratio gears.

 

this thread ended up being some what informative...