So...i have a dilemma :banghead: where i want to install a lighter crank pulley (of the same diameter as stock) on my Scion tC because i would love the better throttle response and freed up horse power but i have heard from numerous sources that it causes an imbalance and will shorten the lifespan of your engine. Will the imbalance cause significant engine wear in the long run? What should i do?!?!? i'd appreciate any help or opinions with what i should do.
If anything underdrive pulleys increase the life of your engine.
And decreases the power of everything else but the engine :mrgreen:
this is the same diameter as the stock no underdrive just lightweight
PontiacFan27: If anything underdrive pulleys increase the life of your
could you explain how?
Less strain on the moving parts.
If it's other purpose is to provide harmonic balancing you need to look carefully at the selection.
ehhh.... did u mean that lightweights increase or decrease? not gonna say anything until i get an answer to this.....
If you want longivity and reliability stay with stock. But if you are considering this mod you have no intention of treating the engine delicately do you? :wink2:
aw man, u just had to go and tell them the truth! i wanted to see wat pontiacman was going to reply to me.....
Lightweight/underdrive pulleys offer more reliability than stock. They lighten the load on moving parts.
Well that's a fairly confident statement. Are you attributing that to less compliance effect on the crankshaft?
so is the lightweight pulley a good idea or not?
nevermind, he still said wat i imagined he would say. look up on some info
on stock underdrive pulleys, aka engine dampers. they are heavy for a
reason, to counter-balance the strong vibrations caused by the crankshaft
itself. mounting up a lighter damper will throw the delicate balance off,
causing vibrations to be able to escape in larger frequencies, causing the
engine to last less.
Vibrations = Bad.
Balance = Good.