Is it better to leave the flywheel stock and balance or have it lightened up and balanced?
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I have access to a large lathe so it's easy for me to turn a few lbs off mine. Reasons for doing it; 1) the engine spools up faster. 2) less weight on the rear main. The weight is taken off the OD, not the center making the mass less effective. All engine manufacturers have been lightening their flywheels. The stock FW weighs about 63lbs. Show me one auto manufacturer whose FW weighs anything near that! Crappy roads made the heavy FWs necessary, better roads has allowed much lighter FWs to be used. Reasons for not doing it, It isn't stock. Your engine may have slightly different running characteristics. I generally take them down to about to 57-55 lbs, not much difference! Some people take them to down thirty lbs. Then have it properly balanced . I find it to be a desirable modification.
Terry
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