I am curious to know what gains I could expect from a lightened flywheel. I have a 1g Laser with the mods listed below. Are there any downsides to the flywheel? Does anyone have one? Or do you know anybody with one? Your input is appreciated because I might get one. Thanks
lightened flywheel? Yes or no?
poeman
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I am curious to know what gains I could expect from a lightened flywheel. I have a 1g Laser with the mods listed below. Are there any downsides to the flywheel? Does anyone have one? Or do you know anybody with one? Your input is appreciated because I might get one. Thanks
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545 Posts
I DISAGREE
ok its not over kill its one of the major increasments you can do. Your accelleration will increase. your car will rev up faster. and your 1/4 will get better from the lightened weight (NOT ENOUGH TO RILLY NOTICE) but it is on of the things you will need to do if you are going for the record.
Dsmman said:With the lightend Flywheel... you will have much better throttle response. My guess is that your not running 10's
So, IMHO a lightend Flywheel is over-kill. Spend your money on something that will have more HP gains.
ok its not over kill its one of the major increasments you can do. Your accelleration will increase. your car will rev up faster. and your 1/4 will get better from the lightened weight (NOT ENOUGH TO RILLY NOTICE) but it is on of the things you will need to do if you are going for the record.
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160 Posts
I agree with Super Talon. It's a great mod that really doesn't have many drawbacks. Except price, of course.
I would only recomend a lightend flywheel for a fwd car and not an awd car due to the increase in drivetrain mass, I call it the "wiffle ball effect" let me explain, take a standard baseball and pitcure it as the drivetrain of an awd car, now pitcure the wiffle ball bat as the flywheel and your arms as the engine,sure you can swing the bat alot faster and eaiser until you hit the ball and it falls about five feet infront of you. The heavier flywheel carries the inertia from the engine over to the drivetrain. I also would only apply this to drag racing where the race is won or lost at the start. For all of you with awd you know what I am talking about, if you have ever tried to launch at 4000 rpm and nothing happend but a bunch of lag!! If you are not into straightline and autocross is more of your style then get the lightest flywheel you can find, fwd or awd i.e. fidanza or exedy they make some nice units
[91'Talon Awd]
All the good stuff,
J&E pistons
Crower rods
Ported 20g with a 6 dregree clip
Custom made 3" exaust from the turbo back
HKS cams 264I 264E
Jun cam sprockets
1mm larger ss valves
Titanium retainers and locks
Ported exhaust ports that flow 305 cfm each!!!!
Ported 95'exhaust manifold
HKS external wastegate w/15lb spring (should have went with a TiAl!!!)
Buschur old style intercooler 2.5"
Sard blowoff valve (should have went with a chassis shop valve)
Extrudehoned intake manifold w/ a Lancer EVO 4 throttlebody
660 cc injectors with Buschurs cosmo fuel pump
MSD Dis2 ignition w/stock coil pack and Mangencore 10mm wires
HKS VPC, Apexi avc-r and allot of ecu modds
4 rear end out of 93 Laser RS that I had cryogenically treated, have not broken an axle since!!!
[ Best 1/4 mile 11.54 @ 124 mph
[ Best 60' 1.62 w/drag radials
[ Best 0-60 mph 3.78 sec Official at Sacramento Raceway
[91'Talon Awd]
All the good stuff,
J&E pistons
Crower rods
Ported 20g with a 6 dregree clip
Custom made 3" exaust from the turbo back
HKS cams 264I 264E
Jun cam sprockets
1mm larger ss valves
Titanium retainers and locks
Ported exhaust ports that flow 305 cfm each!!!!
Ported 95'exhaust manifold
HKS external wastegate w/15lb spring (should have went with a TiAl!!!)
Buschur old style intercooler 2.5"
Sard blowoff valve (should have went with a chassis shop valve)
Extrudehoned intake manifold w/ a Lancer EVO 4 throttlebody
660 cc injectors with Buschurs cosmo fuel pump
MSD Dis2 ignition w/stock coil pack and Mangencore 10mm wires
HKS VPC, Apexi avc-r and allot of ecu modds
4 rear end out of 93 Laser RS that I had cryogenically treated, have not broken an axle since!!!
[ Best 1/4 mile 11.54 @ 124 mph
[ Best 60' 1.62 w/drag radials
[ Best 0-60 mph 3.78 sec Official at Sacramento Raceway
Joined
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235 Posts
Non-turbo's are all FWD cars 
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545 Posts
well its a word now you get what i mean right. well then i guess my MADE UP word did its job.
Re: I DISAGREE
??? Your contradicting yourself. But, if you are "going for the record".....not sure what that means?? Wouldn't you want some more noticable HP gains such as NOS or a Turbo.
You said it yourself .... not enough to notice... so why waist your $$$$$$ If it were me, I would wait till I had to replace the clutch then if I had some $$$ left over I would put in a lightened flywheel.
If your 1/4mi ET will "get better" but it's "not enough to really notice" What is your point???Super Talon said:
??? Your contradicting yourself. But, if you are "going for the record".....not sure what that means?? Wouldn't you want some more noticable HP gains such as NOS or a Turbo. You said it yourself .... not enough to notice... so why waist your $$$$$$
If it were me, I would wait till I had to replace the clutch then if I had some $$$ left over I would put in a lightened flywheel.
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235 Posts
It just makes the car easier to accelerate also makes the car decelerate faster.
It really doesn't add HP or torque, just makes it a tad easier on the engine to do the above lol. Which will actually make your 1/4 mile somewhat better if not noticable.
Underdrive pulley(s) are more worth the money IF that is all you plan on doing.
[Edited by LaFemmeDSM on 07-16-2001 at 04:03 AM]
It really doesn't add HP or torque, just makes it a tad easier on the engine to do the above lol.
Which will actually make your 1/4 mile somewhat better if not noticable.Underdrive pulley(s) are more worth the money IF that is all you plan on doing.
[Edited by LaFemmeDSM on 07-16-2001 at 04:03 AM]
Joined
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545 Posts
ok here are the stats on a lightened fly wheel... Your accelleration will be greator but your torque on the line will suffer. Infact my friend who did this to his supra was doing 1.7 60' and now he does 2.3 60' how ever he is still faster because it is made up in the rest of the track. He just recently added some mods and how he is turning 1.9 60' times. ITS A PICKEY MOD TO SAY THE LEAST!!!
a 10 sec drag car has nothing to gain from a lightened flywheel other than making it difficult to launch. I cant even get through 1rst gear without spinning on a much slower car, a lightned flywheel wont help me any for drag racing, it would likely for road racing or anywhere that quick revving is useful. Its the low powered cars that a lightened flywheel helps most. The higher the gear the less affect it has on power to the ground. It helps a great deal in the lower gears. The downside are revs drop faster the same way they rise faster, you may drop out of the powerband if your not on it or coast. Unless you have forced induction AND drag race often I say get it.
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901 Posts
a lightened flywheel will lessen the rotational inertia of the engine, which will only affect the torque that's felt when you let out/dump the clutch... once the engine and input shaft on the tranny are both spinning at the same speed, that lack of momentum caused by the lightness of the flywheel wont matter anymore. then engine has less weight to spin, and so wastes less power on spinning up that weight...and thats all that really matters ..basically, you dont lose that much real engine torque, just the torque provided by the heavy flywheel spinning around really fast then dumping all its energy onto the clutch.
lemme put it another way.
you remember back in elementary school how hard it was to keep a merry-go-round moving fast with 15 kids on it?... thats the heavy stock flywheel.
but remember how easy it was to push the same merry-go-round when it was empty?... thats the lightened flywheel.
and dumping the clutch is like trying to stop them, the 10 kids have alot more momentum than the empty one, but once that burst of momentum is gone, the one with 10 kids is still harder to push than the empty one....
on a drag strip you can use that burst of momentum alot more due to the rapid gear changes (but usually not enough to beat the advantage a lightened flywheel has while you arent shifting), but on a road course you usually shift without dumping the clutch(in turns anyway) and you cant take advantage of a heavy flywheel. thats why lightened flywheels are great for road courses, but as great for drag racing.
you know how 195 hp at the crank isnt 195 at the wheels?... well getting rid or rotational mass from the drivetrain makes for smaller losses between the crank and the pavement, more power at the wheels. a lighter flywheel also helps the engine rev faster... so you can get all the ricers to bow down to your greatness without even breaking any laws.
another plus is that you wont wear out your tires from spinning all the time, and on a fwd, its easier to launch without spinning... and most of all your tranny will last longer cause less of that huge surge will hit your transmission when you dump the clutch during hard gear changes...
sorry for the drawn out post, i couldnt think of a way to explain it any shorter..
lemme put it another way.
you remember back in elementary school how hard it was to keep a merry-go-round moving fast with 15 kids on it?... thats the heavy stock flywheel.
but remember how easy it was to push the same merry-go-round when it was empty?... thats the lightened flywheel.
and dumping the clutch is like trying to stop them, the 10 kids have alot more momentum than the empty one, but once that burst of momentum is gone, the one with 10 kids is still harder to push than the empty one....
on a drag strip you can use that burst of momentum alot more due to the rapid gear changes (but usually not enough to beat the advantage a lightened flywheel has while you arent shifting), but on a road course you usually shift without dumping the clutch(in turns anyway) and you cant take advantage of a heavy flywheel. thats why lightened flywheels are great for road courses, but as great for drag racing.
you know how 195 hp at the crank isnt 195 at the wheels?... well getting rid or rotational mass from the drivetrain makes for smaller losses between the crank and the pavement, more power at the wheels. a lighter flywheel also helps the engine rev faster... so you can get all the ricers to bow down to your greatness without even breaking any laws.
another plus is that you wont wear out your tires from spinning all the time, and on a fwd, its easier to launch without spinning... and most of all your tranny will last longer cause less of that huge surge will hit your transmission when you dump the clutch during hard gear changes...
sorry for the drawn out post, i couldnt think of a way to explain it any shorter..
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545 Posts
I just purchased a firdanza fly wheel... and for those of you that dont know... you will have to get a turbo pressure plate and clutch while you are at it... thats close to 800 bucks worth of stuff. I also got the act 2100 so thats the other 400 bucks in that equation...
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