Aluminum Flywheels?
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Elder User
Joined: Sep 2003
Posts: 641
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From: Louisiana
Aluminum Flywheels?
Take a look at this. http://cgi.ebay.com/ebaymotors/ws/eB...category=33732 
Does anybody have any experience with these or other type of aluminum flywheels. Do they hold up as good or better than steel. Are there any performance gains other than weight loss and mass rotation. Any info would help. I did a search but didn't find anything.
Does anybody have any experience with these or other type of aluminum flywheels. Do they hold up as good or better than steel. Are there any performance gains other than weight loss and mass rotation. Any info would help. I did a search but didn't find anything.
Senior User
Joined: Apr 2004
Posts: 368
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From: NH
aluminum
check out SSG.they make a lot of different aluminum flywheels and some other hard core gear.we used one of their flywheels in our 4 banger import and it's held up pretty good considering we run it to almost a 12,000 rpm red line.what i noticed going to this (aluminum)flywheel was the engine spooled up a little faster but the car didn't hit as hard on launches untill we removed a lot of weight from the car.the way it was explained to me was that lighter flywheels will get to red line faster and the heavier flywheels have greater rotating weight which helps keep the motor turning when you drop the clutch.
Lead Driver
Joined: Nov 2002
Posts: 9,558
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From: Concord, NC
I'd stay away from an aluminum flywheel on a truck. Racing applications are the primary place for them, because it reduces the reciprocating mass of the engine so it can rev quicker (lower rotational inertia). This is exactly opposite of what you want in a truck - you want something that will have a lot of inertia so that you can get the thing moving. You'll really notice this at slow speeds. Aluminum also has a shorter fatigue life than steel/cast iron, so it could break, especially with the loads of moving a truck around.
Senior User
Joined: Apr 2004
Posts: 368
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From: NH
flywheels
take a bicycle tire and rim,spin the tire then try to slow it down.relatively easy.now take that same rim and put a much thicker,heavier tire on it.now spin it.what you will notice is that you have to exert more energy to slow it down.it's the same thing with your engine.with a lighter flywheel it dosen't take as much to bring the rpms domn.(movement of the vehicle)with the heavier flywheel it's going to take more drag to bring the rpms down.(heavier vehicle or harder launch)
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Elder User
Joined: Sep 2003
Posts: 641
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From: Louisiana
Don't mean to be rude or anything. 
But I'm pretty much up on dynamic applications. If you look at my avatar, I maintain that piece of equipment and other models. I was just wondering about it's ability to hold up under severe stress loads. I just could'nt see the need to go from steel to aluminum in such an enviroment as the flywheel - disc - pressure plate. To me, it looks like you might get a few rounds out of it before it needs resurfacing or replacement.
But I'm pretty much up on dynamic applications. If you look at my avatar, I maintain that piece of equipment and other models. I was just wondering about it's ability to hold up under severe stress loads. I just could'nt see the need to go from steel to aluminum in such an enviroment as the flywheel - disc - pressure plate. To me, it looks like you might get a few rounds out of it before it needs resurfacing or replacement.
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Elder User
Joined: Sep 2003
Posts: 641
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From: Louisiana
Got me some rest, about 6 hrs, woke up and had a brain fart. 
If these guys are not interested in longevity of parts and want max RPM fast. I might look into the differences of aluminum versus carbon fiber and make a composite flywheel and charge a $1000 for it. Make some fast bucks before anybody realizes it ain't worth a *****.
But with my luck, somebody has probably already done this.
If these guys are not interested in longevity of parts and want max RPM fast. I might look into the differences of aluminum versus carbon fiber and make a composite flywheel and charge a $1000 for it. Make some fast bucks before anybody realizes it ain't worth a *****.
But with my luck, somebody has probably already done this.
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Senior User
Joined: Mar 2004
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From: Spokane
Was over at a friends house and he put an aluminum flywheel behind his built 396. He could rev it up to 7000 rpm and back down to idle in 2 seconds. Very cool. He said it was very bad if you miss a shift and have your foot in the throttle. Could blow the engine because of high RPM. He took the 69 Nova out in the road and jumped on it and spun the rear-end 180 deg. and screwed up the drive line. Very cool again.