Quote:
Originally Posted by NonStopTuning
Take a look at any modern (1980s and beyond) Honda, Toyota, Nissan, or other Japanese engine and you will find no such balancer. These engines are all internally balanced, and this process has improved even further since the late 1990s. So the topic of a BALANCER does not apply here.
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While I believe the comment about being internally balanced may hold true, the 4G63 had issues with lightweight crank pulleys. I never had one, so I don't recall how long it typically took to manifest, but it's an example that demonstrates the concern is valid.
Of course, that means nothing for this particular engine - We've seen some harmonics charts that demonstrate ALL measured pulleys have a harmonic - just of different natures. Without knowing how that applies to an engine I can't make an educated read of the data (I don't know if even or odd order is more destructive in this case, though other areas I work that deal with sinusoidal resonance put odd order as much worse...) but it makes me skeptical all around. Even the stock pulley has issues - waterfall looks notably worse than aftermarket pulleys of any kind, but the lightweight pulley seems to keep those isolated to higher orders (except that 2nd order bump at 2k all pulleys seem to have issues with is worse on the lightweight - since it's at the start of the graph, perhaps it's an artifact of the process?)
Then, there are the remaining pulleys you guys offer, to which none of this likely applies. I'm pretty sure I remember you'll happily NOT send a crank pulley for anyone worried...
I'm also not buying (at least, not soon...) so no horse in this race.
It's an expensive proposition. Suggesting "well, all these people do this and they're fine" is well and good, but... I can say the same about ignoring stop-signs in my neighborhood.