REVZ TO9

If so, what would be the best weight flywheel for my mod setup? I/H/E only

afwfjustin

unless you're getting a new clutch, it's not worth it. This should be in s2000 talk btw. Or, I'm sure a search will come up with tens of threads about flywheels.

vtec9

lightened flywheel = less rotational mass = less work for the engine to spin the flywheel, clutch assembly, transmission, etc. Basically the decrease in weight will allow the engine to spin up faster, so you will increase RPMs more rapidly. Also, RPMs will drop more rapidly because there is less resistance to change in velocity. Think of it like this: make a fist and spin your arm around. its easy to get it rotating quickly, and its very easy to stop the rotation. Now hold a 5lb weight and try it again. much more difficult.

silvers2k01

It revs up quicker but it doesnt make the car any faster, correct? sorry for the newb question.

jyeung528

if the flywheel is spinning faster...so is the clutch/pp...so is the transmission gears, so is the driveshaft, so is the final gear, so is the half shafts, so is the wheels, so is the car.

jyeung528

unless i am wrong.

Lsos

Yes but that's not really relevant. It's not how fast it spins...we're still limited to 9000 or 8000 rpm.

What it will do is make it easier to CHANGE the rotational speed of the flywheel. When in neutral, your rpm will rise much faster when you give it gas, and fall faster when you release.

This kind of, maybe carries over to when you're in gear and accelerating. However, when accelerating we musn't forget that besides a ~7lb flywheel, the engine also has to accelerate a ~3000lb car. A few pound reduction in a flywheel is not going to do much to that end.

stphotographer

It makes revving easier. However, if you drive a lot in stop and go traffic or up steep hills it is easier to stall the car out.

9KADDCT

basically, a flywheel allows you to rev up faster because you lessen the rotational force needed ...

let's say it takes your car 2.5 second to rev from 1k to 9k with the stock flywheel.... if you change it to a lighter flywheel, itll take your car LESS than 2.5 seconds to rev from 1k to 9k again..

you dont gain hp/torque from this mod.. if you had 200whp/160 tq with the stock flywheel, you still end up with those power ratings after the flywheel.... BUT because you loose hp/tq from all the heat dissapation and friction losses throughout, you will 'free' up some hp/tq as a result of the lightened flywheel

again, let's say you had 240hp/160 tq with the stock flywheel, you would probably only have 200 WHEEL HP/130 tq when you dyno the car.. the 40 hp loss occurs because of the above mentioned details.. with a lightened flywheel, you STILL have 240hp/160 tq, but now your wheel hp might increase (depending on how light the flywheel is) since it requires less rotational energy to spin it

ok, im done. ill let Billman and the other more technical guys explain it. the guys with lightened flywheels are the right people to ask for their thoughts/experiences

nearwater4me

I heard some people say that you lose high end w/ lighter flywheels.
Why is that?

Dan