I have searched for a hour and cant really find anyone who talks about track times before and after a LW flywheel........what i want to know is has anyone did this comparison and actually ran faster with a flywheel.......or has anything improved or gotten worse at the track??????I am going this weekend to find out myself just looking for what to maybe expect......

97 gsr
AEM cai
9.5lb flywheel
clutchmaster stg. 3

 

Lightened flywheel will not make your car faster in the 1/4.

If you don't know how to comensate for the lost momentum at launch and between shifts, it can even make your car slower.

However I have a 7.5 lb. Clutchmasters flywheel and I love it. The car revs up VERY fast when downshifting, which is great for autox, road course, or otherwise spirited driving around some twisty back roads. You don't do any downshifting on a drag strip, though, so don't expect any improvement.

 

if anything you'll lose time on the strip. in drag racing you want the rpms to stay where they are, or go down slowly. i've found i have to keep the revs up between shifting when i race now with my clutchmasters flywheel.

 

i tho that light flywheel make very little fast..cause it make car speed up fast,,isnt it?? then what is the point of having light flywheel?? just showing off u can rev up fast?? lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmotorsports &raquo;</TD></TR><TR><TD CLASS="quote">if anything you'll lose time on the strip. in drag racing you want the rpms to stay where they are, or go down slowly. i've found i have to keep the revs up between shifting when i race now with my clutchmasters flywheel.</TD></TR></TABLE>

less rotating mass...how can this slow down u car? seriously.

 

if a lw flywheel doesnt really improve you speed and can actually slow you down then why does everyone even want one cause i just installed mine with expectations of improved exceleration and a faster car..........reving faster should equal faster exceleration.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ElectronBlueGsr1.8 &raquo;</TD></TR><TR><TD CLASS="quote">if a lw flywheel doesnt really improve you speed and can actually slow you down then why does everyone even want one cause i just installed mine with expectations of improved exceleration and a faster car..........reving faster should equal faster exceleration.....</TD></TR></TABLE>

flywheel wont give u hp, so u might not actually accelerate faster when in a certain gear, however u are right: a car's acceleration is directly determined by how fast the rpms rise from shift point to redline.

 

there has to be someone out there who has actually did a track test to prove this theory on a lw flywheel to see what the gains or loses are at the track with times and mph........

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PatrickGSR94 &raquo;</TD></TR><TR><TD CLASS="quote">Lightened flywheel will not make your car faster in the 1/4.
</TD></TR></TABLE>

I would think that it would, to the same affect lighter wheels free up horsepower. Less rotating mass and inertia.

 

you would have to see how much hp you gained from the lw fw at the wheels yeah your engine will rev faster but as said earlier a lw fw will help your revs go down quicker as well which in Auto-x is great for controling speed arround turns and not have to worry so much on braking. sorry for the run on sentence i don't pay attention to sentence structure when posting.

 

so my toda racing flywheel im going to install on my GSR is going to slow me down in the 1/4 mile ?

 

Yes, you should all go and buy extra heavy flywheels....and those of you who have LW FWs should buy my stock one(Ill take your LW+$50 cash). Actually in this issue of MM&FFs they dropped .1 second off a 12.3 sec mustang. Anyway, Im pretty sure that Im not consistant enough to say well I ran a 15.4 before and a 15.2 after....it could have been the weather and nothing to do with the LW FW.

 

I'll ask a related question:

Doesnt a LW flywheel allow more power to be transferred to the wheels because less power is needed to move it?

 

this is the same thing i am thinking blacksage rev faster = more horses to the wheels

 

Why wouldnt a lighter flywheel make more power ?

Thats like saying I changed my 30 lb rims to 12 lb rims but my car makes the same power.

And #2. Why would it make you slower at the track ? Because the revs go down between shifts faster ?

Why the hell arent you full throttle shifting at the track anyway ?

 

I think make more power is the phrase word to use.

How about frees up power? Just how removing the A/C, PS, etc frees up power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackSage &raquo;</TD></TR><TR><TD CLASS="quote">I think make more power is the phrase word to use.

How about frees up power? Just how removing the A/C, PS, etc frees up power.</TD></TR></TABLE>

Parasitic drag is a lot different then rotating mass and potential energy.

Faster revs does not necessarily equal more horsepower, either.

 

http://www.nissanperformancema...sarah/

The last question has one of the best descriptions I have read on the subject.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95 integra &raquo;</TD></TR><TR><TD CLASS="quote">Yes, you should all go and buy extra heavy flywheels....and those of you who have LW FWs should buy my stock one(Ill take your LW+$50 cash). Actually in this issue of MM&FFs they dropped .1 second off a 12.3 sec mustang. Anyway, Im pretty sure that Im not consistant enough to say well I ran a 15.4 before and a 15.2 after....it could have been the weather and nothing to do with the LW FW.</TD></TR></TABLE>

0.1 seconds huh, lol that in no way can be proven to be attributed from the flywheel. I don't think any human being can drag race a car with a manual transmission and not have at least 0.1 seconds variable between all runs, given all conditions being the same.

How quickly a car accelerates off the line is determined mainly by the amount of torque the engine makes, the car's weight, and the car's gearing, plus other little things like tires (compound, diameter - which is related to the gearing), suspension (weight transfer), etc. Okay so changing to a lightweight flywheel obviously drops the overall weight of the car a little bit, but that's not enough to make any difference really.

Sure when the tranny is in neutral or the clutch is disengaged, the engine will rev up faster with the new flywheel. But after you've launched and the clutch is fully engaged, the engine is still trying to accelerate the same amount of weight, using the same gearing, with the same amount of torque, on the same tires, etc. It won't really improve acceleration any detectable amount, at least not beyond the threshold of human variance. And since the engine slows down faster just as it speeds up faster when the clutch is disengaged, you usually have to launch at a higher RPM to keep from launching, and you really have to be quick on shifting to keep the engine in the powerband. If the revs fall too low when launching, you bog, and if they fall too low when shifting, well it just slows you down from the ET's you could have made.

Now on the autox course or road course, where you actually have to brake, turn, and downshift, the lightweight flywheel really helps you keep the revs up in the powerband. You will spend less time revmatching, trying to get the revs up while downshifting, and so it can help your times there if you practice and get good at rev matching and heel-toe downshifting.

So like I said, don't expect it to improve 1/4-mile ET's. How about taking it out to an autox event that requires REAL driver skill?

 

just like everything else on the motor, everything will work as a whole and be in balance with each part.
light flywheel on a stock motor that can't make power at a high rpm? will not work
light flywheel on a motor that has the ability to make power at a high rpm, yes it would benefit from it.
drag racing, its all about acceleration, keeping the motor within its power band between shifts is the key.

a flywheel alone will not do jack for you, it might even hurt you if you drive it like you used to.

edit, when i say high rpm. i mean high as in 8000-9000 rpm

 

a lighter flywheel will increase you whp and will make the car faster

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by riceball777 &raquo;</TD></TR><TR><TD CLASS="quote">a lighter flywheel will increase you whp and will make the car faster </TD></TR></TABLE>

care to explain how? If it's true I'd really like to know how.

 

you should read the last question in this link http://www.nissanperformancema...sarah/
then you will know how it frees up horse power...they explain it right there for you

 

oh and im going to the track this saturday...ill run some times and i have a 8lb flywheel at my house waiting to get put in and ill go to the track again later this month and see if i see any difference...yeah some could be due to weather....but ill try to remember conditions each day

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PatrickGSR94 &raquo;</TD></TR><TR><TD CLASS="quote">

care to explain how? If it's true I'd really like to know how.</TD></TR></TABLE>
a lighter flywheel will decrease the rotation assembly thus less power is loss turning the engine and more hp will get to the wheels
a lighter flywheel will result in more whp, faster engine revs and but most noticably the revs will drop much much faster

downfall of lighter flywheel
it will be harder to get the car moving namely in first gear
and if the rpms drop below idel the engine does not recover as well and sometimes will just stall