Exedy Stage 1 Clutch, Exedy Flywheel, F1 Counterweigh
Tailgaters beware
Joined: Sep 2006
Posts: 494
Likes: 2
From: Ona, WV
Technically if you dyno a car with a stock flywheel, replace with a lightened flywheel, and redyno you will see an increase to the rear wheels. Same with lighter wheels. You didn't GAIN hp, but you wasted less in the drivetrain. Parasitic losses will go down as it takes less energy to spin the flywheel.
IIRC every lb of rotational mass removed is equivalent to removing like 3.3lbs of static mass as far as acceleration and braking are concerned. Less energy wasted and less energy to dissipate into heat while braking.
BC
IIRC every lb of rotational mass removed is equivalent to removing like 3.3lbs of static mass as far as acceleration and braking are concerned. Less energy wasted and less energy to dissipate into heat while braking.
BC
You may have had 17% loss from the motor to the wheels and after a lightened flywheel you might have 15-16%.
Cool, never thought about it like that.
I may need to do a flywheel when I put in my Exedy clutch, so I will probably get that light weight BHR and counterweight. I can't wait to feel the difference!
Last edited by Rocketman1976; Jun 3, 2010 at 02:42 PM.
I understand the benefits of a lighter flywheel to a point, but doesn't a heavier flywheel carry more energy. For the drag strip I understand there isn't a need to keep the energy spent. On a road course on the the other hand wouldn't a heavier flywheel allow me to store energy when letting the clutch out.
The lighter flywheel on the roadcourse would spin down much faster. A heavier flywheel would store kinetic energy and keep me from loosing as much rpm in shifting as well. Has anyone played with maybe a 20lb flywheel on a road course for improved top speed and running through the gears.
The lighter flywheel on the roadcourse would spin down much faster. A heavier flywheel would store kinetic energy and keep me from loosing as much rpm in shifting as well. Has anyone played with maybe a 20lb flywheel on a road course for improved top speed and running through the gears.
#50
Joined: Nov 2007
Posts: 7,521
Likes: 11
From: Caput Mundi
It's actually the opposite, the lighter flywheel wastes less power allowing you to run faster through the gears and makes the throttle fairly more responsive. You lose some momentum up top in the higher gears (5\6th) but nothing noticeable when compared to the gains in the lower gears (where the flywheel actually has to work).
It's the same as switching to lighter rims from a certain point of view.
I have bhr's spec flywheel and the rpm drop is neglectable when shifting fast, maybe you have to get used to it while daily driving but it's a matter of minutes
It's the same as switching to lighter rims from a certain point of view.
I have bhr's spec flywheel and the rpm drop is neglectable when shifting fast, maybe you have to get used to it while daily driving but it's a matter of minutes
ridlle me this batman...
is there a problem with the fly wheel being too light? what is the limit if there is one? I read somewhere that 8lb fly wheels were not good. could you explain?
Direct Quote vvv
"The 8 pound racing flywheels that our competitors offer are too light for a Mazda RX-8 .Too hard to drive without slipping the clutch too much"
is there a problem with the fly wheel being too light? what is the limit if there is one? I read somewhere that 8lb fly wheels were not good. could you explain?
Direct Quote vvv
"The 8 pound racing flywheels that our competitors offer are too light for a Mazda RX-8 .Too hard to drive without slipping the clutch too much"
invest in an air compressor and an impact gun. Once you own an air compressor you never stop using it. Youll eventually own a whole lot of tools to make your life easier. From ratchets, dremels, grinders, impact tools and so on.
Tailgaters beware
Joined: Sep 2006
Posts: 494
Likes: 2
From: Ona, WV
ridlle me this batman...
is there a problem with the fly wheel being too light? what is the limit if there is one? I read somewhere that 8lb fly wheels were not good. could you explain?
Direct Quote vvv
"The 8 pound racing flywheels that our competitors offer are too light for a Mazda RX-8 .Too hard to drive without slipping the clutch too much"
is there a problem with the fly wheel being too light? what is the limit if there is one? I read somewhere that 8lb fly wheels were not good. could you explain?
Direct Quote vvv
"The 8 pound racing flywheels that our competitors offer are too light for a Mazda RX-8 .Too hard to drive without slipping the clutch too much"
Also, I think one problem is that because you lose the inertial force your rpms drop to rapidly when switching between gears, so you have to shift faster or rev match the rpms.
Those are the problems I have heard of and there may be more.
Last edited by Rocketman1976; Apr 4, 2011 at 02:47 PM.
Some people don't like them being so light because your motor loses inertial force which gives you more torque, although you will gain upper rpm HP.
Also, I think one problem is that because you lose the inertial force your rpms drop to rapidly when switching between gears.
Those are the problems I have heard of and there may be more.
Also, I think one problem is that because you lose the inertial force your rpms drop to rapidly when switching between gears.
Those are the problems I have heard of and there may be more.
Is that a typo? thats interesting
Registered User
Joined: Mar 2011
Posts: 19
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go to harbor freight, i bet its under 30 bucks. i get all of my tools there just because of the lifetime warranty. If it breaks ill just get a new one.
Thread Starter
Registered
Joined: Apr 2010
Posts: 27
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From: Grand Rapids MI
So, After two years and 30k miles of driving the stage 1 Exedy Clutch and Exedy Flywheel combo was holding up pretty well. The only thing that bothers me the most was after a burn out the clutch was sticky from heat it generated and I had hard time engaging from first to second. I had to wait for the clutch to cool down before I can drive the car normal again. I wonder if the stage 2 Exedy with the ceramic disk would be better?
So, After two years and 30k miles of driving the stage 1 Exedy Clutch and Exedy Flywheel combo was holding up pretty well. The only thing that bothers me the most was after a burn out the clutch was sticky from heat it generated and I had hard time engaging from first to second. I had to wait for the clutch to cool down before I can drive the car normal again. I wonder if the stage 2 Exedy with the ceramic disk would be better?
sounds like you slipped the clutch and overheated it. you would do the same with the stage 2. maybe learn how to treat a car..
beers
