cross-drilled flywheel
Thread Starter
Joined: Nov 2001
Posts: 951
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From: Las Cruces, NM
cross-drilled flywheel
I was thinking that cross drilling a flywheel might be a ggod way to reduce its rotating inertia without spending a lot of $. Supposedly if done correctly, the structural stability of brake rotors aren't affected. It may eat your clutch a little faster, but the lining doent touch everywhere, so maybe you could just drill in places the lining doesn't meet the flywheel. What do you think?
Admitted Sevenaholic
Joined: Feb 2001
Posts: 1,910
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From: Ashland, OH
You ever seen a car that had a flywheel seperate from the motor?
not pretty. I would'nt take the chance in trying to modifiy it to save a few pounds, save the money and get a real one.
not pretty. I would'nt take the chance in trying to modifiy it to save a few pounds, save the money and get a real one.
Thread Starter
Joined: Nov 2001
Posts: 951
Likes: 3
From: Las Cruces, NM
I was just thinking that I could find a flywheel at a junkyard for pretty cheap and just experiment with it. I wouldn't want to screw up my own flywheel. What do you mean 'separate'? How can it get off? You mean it may explode like a clutch can?
A flywheel is a high stress item, especially in our high-RPM beasts. More so when driven hard. (Not that any of us would ever be abusive with clutch engagement or RPM 
) When you drill a flywheel, no only do you run the risk of unbalancing the flywheel, (Think about how an out-of-balance wheel makes the car shake and multiply the force by about 50 times to understand how critical flywheel balance is) you also run the risk of stress cracks in the metal caused by the drilling. The problem with geting a junk flywheel and drilling it is the collateral damage if the flywheel should fracture at a high RPM. People have been injured and/or killed by chunks of flywheel flying through the bellhousing and entering the car's interior at several hundred feet per second. I won't say don't do this, but be prepared for disaster and for gawds sake install a beefy scatter shield.
Just my couple o' pennies' worth.
) When you drill a flywheel, no only do you run the risk of unbalancing the flywheel, (Think about how an out-of-balance wheel makes the car shake and multiply the force by about 50 times to understand how critical flywheel balance is) you also run the risk of stress cracks in the metal caused by the drilling. The problem with geting a junk flywheel and drilling it is the collateral damage if the flywheel should fracture at a high RPM. People have been injured and/or killed by chunks of flywheel flying through the bellhousing and entering the car's interior at several hundred feet per second. I won't say don't do this, but be prepared for disaster and for gawds sake install a beefy scatter shield.Just my couple o' pennies' worth.
Old [Sch|F]ool
Joined: May 2001
Posts: 12,865
Likes: 571
From: Cleveland, Ohio, USA
http://www.allpar.com/mopar/shield.html
Trust me you do NOT want to modify your flywheel.
Also think of this... at 60mph your brake rotors are turning about 900rpm. Your flywheel is turning about 3000! At your car's max speed the rotors'll be about 1800rpm. At your engine's max speed the flywheel will be at 8500rpm.
Also, rotors are NOT aimed at your feet, and weigh a LOT less!
Trust me you do NOT want to modify your flywheel.
Also think of this... at 60mph your brake rotors are turning about 900rpm. Your flywheel is turning about 3000! At your car's max speed the rotors'll be about 1800rpm. At your engine's max speed the flywheel will be at 8500rpm.
Also, rotors are NOT aimed at your feet, and weigh a LOT less!
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