What is best crank pulley?

[Icecreamtruk]

Originally Posted by StraightOuttaCanadaEh

Can a technically savvy person explain why having light pulleys and flywheel is bad for the engine? What, does it slow down too fast?

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).

[Captain Snooze]

Originally Posted by Lakitu

Correct me if I'm wrong, but this mod is more for racing and not for daily driving while trying to also stay under warranty, correct?

This mod is purely for creating endless posts on forums. Do the search.

[CSG Mike]

Best crank pulley is a fluidampr, which is heavier than stock.

http://counterspacegarage.com/fluida...a20-4usge.html

[empower-auto]

Originally Posted by CSG Mike

Best crank pulley is a fluidampr, which is heavier than stock.

http://counterspacegarage.com/fluida...a20-4usge.html

My god, thank you.

I was reading page one of this thread and ready to headbutt my monitor.

Fluidampr 100%

[pgranberg11]

Fluid Dampr... done.

[Hawk77FT]

Had Perrin, then raceseng..then Fluidampr! So far so good!

[Somerandom18]

Same. Had the Perrin for 500 miles then went Fluidampr. Way better.

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[mrg666]

I would put back those OEM pulleys if not the Fluidampr

[ame]http://youtu.be/G6qrJPQw0Cs[/ame]

[churchx]

How about 10% underdrive ATI one?

[Somerandom18]

I hear underdrive damages the alternator. Could just be a rumor though.

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[Captain Snooze]

Originally Posted by Somerandom18

Same. Had the Perrin for 500 miles then went Fluidampr. Way better.

In what way?

[Somerandom18]

Originally Posted by Captain Snooze

In what way?

Engine felt smoother. Shifting was different/easier. Oddly enough the car felt more responsive high in the power band.

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[NRXRaptor]

Originally Posted by Lakitu

Correct me if I'm wrong, but this mod is more for racing and not for daily driving while trying to also stay under warranty, correct?

In subarus (and for a particular toyota as well) the crank pulley does not act as a harmonic dampener

[NRXRaptor]

Originally Posted by Icecreamtruk

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).

Obviously there are greater gains to be made with a lighter flywheel, but obviously the crankshaft pulley is much easier to remove in your driveway than a flywheel