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Originally Posted by dbronnik
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Good call! Will be doing this soon, I also have invested in some "unsprung" or "rotational" weight savings as of late.
Kosei k1 wheels 17x8.5 ET40 square 16.xx lbs per corner
*This saves 8 lbs per corner in the front and 10 lbs per corner in the rear over stock 264 wheels so a total of about 36lbs this doesn't include going to a non run flat R compound tire.
Racing brake 2 piece light weight Oem replacement rotors/pads for front and rear. this shaves a total of 22lbs of rotational weight if you do all 4 corners. 12lbs front savings and 10lbs rear.
M4 dct flywheel went in that saves about 10lbs of rotational weight over the stock weighted unit (and most importantly fixed the misfires i was seeing when running 475+ wheel horsepower)
I read pretty deep into rotational weight savings and found a general consensus among a few different articles of "for every ~10lbs of rotational weight removed it's equal to removing about ~26lbs static weight"
The only other weight removal I do for race day is remove the axle back muffler and run a straight pipe not exactly sure on the savings but it's at least 30lbs
Pull the passenger seat and rear seats. The rear I believe are good for 55lbs and not sure what the motorized heated front seat weighs but I think it's around 65-70lbs.