I want to lighten my single-mass m20 flywheel. Several R3v members have thrown out 13 lbs as the mass that they lightened to.
I modeled my flywheel in 3D CAD and have come to the determination that I will need to remove material from both sides of the flywheel in order to hit 13 lbs. There is some information out there that led me to believe that I could get down to 13 lbs with just a trim from the engine side.
To illustrate, below is a screenshot of an extreme amount of material removed from only back side. This is more than what photos of lightened m20 flywheels look like to me. CAD calculates that weight drops from 23.6 lb to 14.4 lb with this material removal.
Below is a screenshot of material removal from both sides, and this is what I believe people are actually doing based on my examination of lightened m20 flywheel photos. CAD calculates that weight drops from 23.6 lb to 13.7 lb with this material removal.
So let me cut to the chase-- Did you guys who cut your single mass m20 flywheel to 13 lbs have material removed from both sides? How much did you remove from the front? I have concerns because removing material from the front would increase the distance between the clutch fork and the pressure plate. And then wouldn't this necessitate the use of a longer release bearing (like the e21 bearing)? Not to mention this would complicate the machining job because flywheel screw holes and dowel pin holes would likely need to be re-drilled and/or the threads would need to be chased etc.
I want to know what you guys did exactly. Please shed some light.
Thanks,
John
I modeled my flywheel in 3D CAD and have come to the determination that I will need to remove material from both sides of the flywheel in order to hit 13 lbs. There is some information out there that led me to believe that I could get down to 13 lbs with just a trim from the engine side.
To illustrate, below is a screenshot of an extreme amount of material removed from only back side. This is more than what photos of lightened m20 flywheels look like to me. CAD calculates that weight drops from 23.6 lb to 14.4 lb with this material removal.
Below is a screenshot of material removal from both sides, and this is what I believe people are actually doing based on my examination of lightened m20 flywheel photos. CAD calculates that weight drops from 23.6 lb to 13.7 lb with this material removal.
So let me cut to the chase-- Did you guys who cut your single mass m20 flywheel to 13 lbs have material removed from both sides? How much did you remove from the front? I have concerns because removing material from the front would increase the distance between the clutch fork and the pressure plate. And then wouldn't this necessitate the use of a longer release bearing (like the e21 bearing)? Not to mention this would complicate the machining job because flywheel screw holes and dowel pin holes would likely need to be re-drilled and/or the threads would need to be chased etc.
I want to know what you guys did exactly. Please shed some light.
Thanks,
John
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