| Icecreamtruk |
10-23-2017 01:43 PM |
Quote:
Originally Posted by StraightOuttaCanadaEh
(Post 2995224)
Can a technically savvy person explain why having light pulleys and flywheel is bad for the engine? What, does it slow down too fast?
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You cant lump the flywheel and crank pulley in the same boat. The crank pulley is used (aside from feeding the other pulleys like the alternator and AC compressor) to balance out the engine vibrations. So there is weight, distributed in such a way that the engine will vibrate less, or at least in a more stable way. Making it lighter lets the engine rev faster, but not by a whole lot, and usually has more negatives than it has positives (when you consider the main positive is "it looks pretty cuz its colored" thing.
Lighter flywheel do nothing in regards to vibration, all the flywheel does is smooth out the engine output by storing energy. The engine doesnt produce a stable constant output, its rather in pulses, each explosion in a cylinder is a pulse of energythat goes down your drivetrain. A lighter flywheel will let your engine rev faster as well, but this time with a much more dramatic inpact than the pulley. While you may save 1 or 2 lbs on the crank pulley, you can save over 10lbs on the flywheel. I have a ACT flywheel which is around 11lbs lighter than stock (I think), and the engine does rev up and down much faster than before. It doesnt make the car any quicker, it makes hill starts a bit harder, but it also makes rev-matching a lot easier, which is what I wanted out of it (as well as a few lbs of the car's curb weight). There isnt any real danger that I know of to get a lightweight flywheel for this car (cannot confirm or deny the same for the crank pulley). |
