Benfits of Aluminum Crank Pulley

[cheese20323]

What are the benefits of an aluminum crank pulley some manufacturers say that its a 7 to 10 horsepower gain any other benefits?

[LoDollar92LX]

What are the benefits of an aluminum crank pulley some manufacturers say that its a 7 to 10 horsepower gain any other benefits?

A shattered oil pump.

those pulleys have no rubber damper and the vibrations caused by this can shatter the oil pump gears. Leave the oem one.

[cheese20323]

So just don't change I would think since it is aluminum everything will work faster or am I wrong?

[4GAccordH22]

The pulley is smaller, so everything will run slower. Thereby lessening the load on the crank, freeing up HP (theoretically). I've heard of people damaging the oil pump with these, but I've never seen it happen. I've known a few people with these on H22s (and I have one in my garage waiting to be installed) with no issues.

[stretch JDM]

i would only trust a good name brand . i have a unorthodox and it has held up great.you also have to get a smaller belt .you gain a little power and free up some weight .

[GhostAccord]

A shattered oil pump.

those pulleys have no rubber damper and the vibrations caused by this can shatter the oil pump gears. Leave the oem one.

If every F22 Honda engine is internally balanced up to a given RPM, and said aluminum LW crank pulley is also balanced up to that certain RPM. Will there really be enough vibration from the accessory belts to shatter gears?

[deevergote]

I wouldn't ever trust a cheapie pulley. I have an Unorthodox Racing pulley on my H22, and it has given me no problems for about 5 years and at least 80,000 miles. Of course, that's just my experience. Others have had oil pump issues, even with Unorthodox Racing (which is the ONLY brand I would trust for a crank pulley.)

The gain isn't really significant. You won't feel it, aside from a slightly more "revvy" feeling. If you want to risk damage to your oil pump, go for it... but only with a quality brand. But honestly, there are other mods that present much less risk (and often greater gains) that could be done first.

[cb7 dohc]

Oil pump fail so dont buy anything cheap, but i would buy a Unorthodox Racing crank pulley i would trust.

[deevergote]

I've heard of people having oil pump failure with UR even... my own personal experience has been positive, though.

[wherm]

all it really does is decrease rotating mass. You can accomplish the same thing with a light weight flywheel. You won't notice nearly as much difference from crank pulley as you will a flywheel. I love my ACT flywheel, it revs quickly and probably benefits me more than a pulley. You'd be better off running a light flywheel and underdrive pulleys on your p/s and alternator. Unless you wanna do major car stereo stuff, but on the otherhand, I had a rather high power system in my car and had minor issues with the underdrive pulley after adding two 1 farad capacitors. Keep in mind though, putting a stereo system in that adds weight nearly defeats the purpose of bolt on engine mods...

[deevergote]

The crank pulley IS the most effective pulley to replace, though. It's minimal, but the crank pulley will free up more power than all accessory pullies combined.

[cheese20323]

all it really does is decrease rotating mass. You can accomplish the same thing with a light weight flywheel. You won't notice nearly as much difference from crank pulley as you will a flywheel. I love my ACT flywheel, it revs quickly and probably benefits me more than a pulley. You'd be better off running a light flywheel and underdrive pulleys on your p/s and alternator. Unless you wanna do major car stereo stuff, but on the otherhand, I had a rather high power system in my car and had minor issues with the underdrive pulley after adding two 1 farad capacitors. Keep in mind though, putting a stereo system in that adds weight nearly defeats the purpose of bolt on engine mods...

oh.....I have a pretty big system like (150 lbs) what are some other things I can do to get more juice out of my F22 without breaking bank?

[stretch JDM]

so you got a big system . so you really don't worry about weight .do some mild exhaust work , header , 2.25 piping and a good muffler . this should be a start without spending too much.

[cheese20323]

so you got a big system . so you really don't worry about weight .do some mild exhaust work , header , 2.25 piping and a good muffler . this should be a start without spending too much.

I'm getting a CAI soon would there be a noticeable gain?