Lightweight pulleys: reliability & smoothness - Toyota Yaris Forums

sh0rtlife · 03-19-2023, 03:40 PM

i use my 58 ford as a solid reference on "harmonic balancer removal"..its an internally balance 312 police interceptor V8..one day it simply let the harmonic balance section go off the engine at idle so no harm no foul...i drove it like that for a while and yes the performance gains from losing the weight was pretty big, but the "harmonic vibration" from not having it was weird and could be compared to the way an exhaust drone works...it was most noticeable at idle as a "wave" of a harmonic vibration would just ripple thru the car...it was gone off idle but if you held a steady rpm for more than 5 mins youd find it again

dont get me wrong v8 5.1 vs I4 1.5, but the principle remains the same...also mind you its not very bad and the way the yaris engine mounts work they may soak up some of it as well....

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03-19-2023, 03:40 PM	#1
sh0rtlife Drives: 2007 5dr canadian import Join Date: Dec 2016 Location: pacific north WET Posts: 1,014	i use my 58 ford as a solid reference on "harmonic balancer removal"..its an internally balance 312 police interceptor V8..one day it simply let the harmonic balance section go off the engine at idle so no harm no foul...i drove it like that for a while and yes the performance gains from losing the weight was pretty big, but the "harmonic vibration" from not having it was weird and could be compared to the way an exhaust drone works...it was most noticeable at idle as a "wave" of a harmonic vibration would just ripple thru the car...it was gone off idle but if you held a steady rpm for more than 5 mins youd find it again dont get me wrong v8 5.1 vs I4 1.5, but the principle remains the same...also mind you its not very bad and the way the yaris engine mounts work they may soak up some of it as well....