Act streetlite vs stock flywheel weight measured
Jun 21, 2006, 06:57 AM
#1
Act streetlite vs stock flywheel weight measured
My car is at Mitsu dealer changing the clutch.
I asked them to measure the stock flywheel vs Streetlite weight.
For my surprise here is the result:
Stock flywheel: 5.891Kg or 12.987lbs
Act flywheel : 6.064Kg or 13.368lbs
I thought that the streetlite was a little lighter than the stock.
How can be the stock flywheel lighter than the streetlite?
Guessing here:
Worn stock flywheel
Resurfaced stock flywheel
Evo 7 flywheel is lighter than Evo 8
Any help I would appreciate
I asked them to measure the stock flywheel vs Streetlite weight.
For my surprise here is the result:
Stock flywheel: 5.891Kg or 12.987lbs
Act flywheel : 6.064Kg or 13.368lbs
I thought that the streetlite was a little lighter than the stock.
How can be the stock flywheel lighter than the streetlite?
Guessing here:
Worn stock flywheel
Resurfaced stock flywheel
Evo 7 flywheel is lighter than Evo 8
Any help I would appreciate
Last edited by k270kmh; Jun 21, 2006 at 08:40 AM.
Jun 21, 2006, 08:15 AM
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Originally Posted by k270kmh
My car is at Mitsu dealer changing the clutch.
I asked them to measure the stock flywheel vs Streetlite weight.
For my surprise here is the result:
Stock flywheel: 5,891Kg or 12,987lbs
Act flywheel : 6,064Kg or 13,368lbs
I thought that the streetlite was a little lighter than the stock.
How can be the stock flywheel lighter than the streetlite?
Guessing here:
Worn stock flywheel
Resurfaced stock flywheel
Evo 7 flywheel is lighter than Evo 8
Any help I would appreciate
I asked them to measure the stock flywheel vs Streetlite weight.
For my surprise here is the result:
Stock flywheel: 5,891Kg or 12,987lbs
Act flywheel : 6,064Kg or 13,368lbs
I thought that the streetlite was a little lighter than the stock.
How can be the stock flywheel lighter than the streetlite?
Guessing here:
Worn stock flywheel
Resurfaced stock flywheel
Evo 7 flywheel is lighter than Evo 8
Any help I would appreciate
Jun 21, 2006, 08:41 AM
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Originally Posted by dudical26
do you mean 12.987 and 13.368? Otherwise the flywheel would weigh more than the whole car....lol
Regarding the total weight, it is not important. The part that matters is the moment of inertia. The moment of inertia is an objects resistance to rotation which would be affected by the location of the weight. If the ACT flywheel is heavier than stock but has most of its mass near the center then it will still rev faster as it will have a lower moment of inertia.
-Paul
Jun 21, 2006, 08:42 AM
#6
Originally Posted by PVD04
If he's overseas, which he probably is as he has an Evo VII, then 12,987 and 13,368 is the way he would write it.
Regarding the total weight, it is not important. The part that matters is the moment of inertia. The moment of inertia is an objects resistance to rotation which would be affected by the location of the weight. If the ACT flywheel is heavier than stock but has most of its mass near the center then it will still rev faster as it will have a lower moment of inertia.
-Paul
Regarding the total weight, it is not important. The part that matters is the moment of inertia. The moment of inertia is an objects resistance to rotation which would be affected by the location of the weight. If the ACT flywheel is heavier than stock but has most of its mass near the center then it will still rev faster as it will have a lower moment of inertia.
-Paul
Amen to that.
Jun 21, 2006, 08:44 AM
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The weight is correct for the ACT flywheel. The stock 8 flywheel weighs 13.9 pounds. I would imagine that the evo 7 flywheel is lighter then the evo 8. I wouldnt think that from resurfacing it would take a pound off.
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Jun 21, 2006, 10:54 PM
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Not a great idea taking it to the dealers to change the clutch. Make sure they adjust the pedal pressure as well. The dealer that did my cusco carbon single clutch messed up my pedal adjust and it kept on grinding until yesterday, where I now have to replace my entire clutch kit.
Jul 2, 2006, 12:38 AM
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Originally Posted by ibanez_926
The weight is correct for the ACT flywheel. The stock 8 flywheel weighs 13.9 pounds. I would imagine that the evo 7 flywheel is lighter then the evo 8. I wouldnt think that from resurfacing it would take a pound off.
quote me if I'm wrong..
Oct 27, 2010, 11:23 AM
#11
Act makes two flywheels. sounds like you have the street lite. The prolite is lighter by a few pounds. Either way ACT flywheel is complete waste of money. There is not a significant enough weight reduction. But what really bother me is the factory cast iron flywheel will provide more friction than the chrome moly ACT. most people arent aware of this. and ACT is certainly not gonna let the cat out of the bag. Same reason disc brakes are not made of chrome moly. Sure would be nice to have disc brakes that didnt rust so easy. But the reality is the faster they rust the better they stop.
Also heavy clutch and fly is a good thing on a 4 cylinder AWD car. they absorb harmonics better, launch better, and get better gas mileage.
Also heavy clutch and fly is a good thing on a 4 cylinder AWD car. they absorb harmonics better, launch better, and get better gas mileage.
Oct 27, 2010, 04:49 PM
#13
Act makes two flywheels. sounds like you have the street lite. The prolite is lighter by a few pounds. Either way ACT flywheel is complete waste of money. There is not a significant enough weight reduction. But what really bother me is the factory cast iron flywheel will provide more friction than the chrome moly ACT. most people arent aware of this. and ACT is certainly not gonna let the cat out of the bag. Same reason disc brakes are not made of chrome moly. Sure would be nice to have disc brakes that didnt rust so easy. But the reality is the faster they rust the better they stop.
Also heavy clutch and fly is a good thing on a 4 cylinder AWD car. they absorb harmonics better, launch better, and get better gas mileage.
Also heavy clutch and fly is a good thing on a 4 cylinder AWD car. they absorb harmonics better, launch better, and get better gas mileage.
Oct 27, 2010, 05:19 PM
#14
I bought an evo 9 w/act flywheel and had an evo 9 w/stock flywheel and exedy twin and do not like how it takes off w/act flywheel so i would recomend stock flywheel or some other full weight flywheel.