Lightweight crank pulley

[Vlady]

So I am considering a lightweight pulley but just curious if its worth the money. Can guys/gals who have experience with this item give me your impression. Currently have drop in filter, front pipe, and openflash stage1.

[FR-S Matt]

It's a nice weight reduction imo and I like the looks of my Perrin LWCP. I see a lot of people selling them as well. I've had absolutely 0 issues with mine and it feels like it makes the throttle a little snappier. Don't expect a drastic change though.

[Calum]

The kartboy pulley whines like a supercharger. It was ok at first but I got tired of it after a while. Now it's sitting in my basement. The difference is noticeable but not huge.

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[pseudo]

I installed the Perrin pulley a few days ago. It was a super easy install and made a small but noticeable difference for me.

I find the car slightly easier to rev-match shifts, and the lurch you get when disengaging throttle in first and second gear is noticeably reduced. For the $100 price tag and easy install, I would say that you don't have much to lose.

[ramiram1984]

I have one used for sale if ya want.

It's tamioka racing.

[Vlady]

Some pics please? And how much?

[Nitro_FRS]

The problem with those pulleys is they have no harmonic balancer. The harmonics will, in the long run, destroy internals.
I took mine off after a few weeks. It did make the engine look good though.

[Vlady]

The boxer engine is naturally balanced from what i read and people have been running these for many miles

[FT-86 SpeedFactory]

Originally Posted by Nitro_FRS

The problem with those pulleys is they have no harmonic balancer. The harmonics will, in the long run, destroy internals.
I took mine off after a few weeks. It did make the engine look good though.

Straight from Subaru America.

"Thank you for your patience as I checked with our Technical Services Department regarding your message below. They advised that the crank pulley is a pulley and nothing else. It is not used as a harmonic damper/balancer.

Thanks for the opportunity to be of assistance. If you need any future assistance, please feel free to contact us again."

Best wishes,

John J. Mergen
Customer Service Department
Subaru of America, Inc.


There is nothing wrong with replacing the crank pulley. If so our race car with 30K miles, countless track miles and more abuse than most cars would see over 150K miles, especially with a supercharger. If true ours would have grenadeed by now, but it hasn't.

Car myths from the 90's.

BTW we run, Lightweight crank pulley, lightweight water pump pulley, lightweight alternator pulley, add a couple pulleys in for the supercharger, lightweight flywheel, lightweight wheels, different rotors, different wheels, different tires, different final gear, which all connect to the rotating mass of the crank. Zero issues...

[Vlady]

This^

[dave77]

Yea I've seen that email before, thanks for posting it up again. Funny how people don't seem to remember this stuff, they always go back to the "harmonic balancer issue."

Originally Posted by FT-86 SpeedFactory

Straight from Subaru America.

"Thank you for your patience as I checked with our Technical Services Department regarding your message below. They advised that the crank pulley is a pulley and nothing else. It is not used as a harmonic damper/balancer.

Thanks for the opportunity to be of assistance. If you need any future assistance, please feel free to contact us again."

Best wishes,

John J. Mergen
Customer Service Department
Subaru of America, Inc.


There is nothing wrong with replacing the crank pulley. If so our race car with 30K miles, countless track miles and more abuse than most cars would see over 150K miles, especially with a supercharger. If true ours would have grenadeed by now, but it hasn't.

Car myths from the 90's.

BTW we run, Lightweight crank pulley, lightweight water pump pulley, lightweight alternator pulley, add a couple pulleys in for the supercharger, lightweight flywheel, lightweight wheels, different rotors, different wheels, different tires, different final gear, which all connect to the rotating mass of the crank. Zero issues...

[Xinshadow]

Originally Posted by Vlady

So I am considering a lightweight pulley but just curious if its worth the money. Can guys/gals who have experience with this item give me your impression. Currently have drop in filter, front pipe, and openflash stage1.

I have the Perrin on mine, I've put on 5k miles so far with -5F temps the last week, zero issues. I want to stay NA so I looked at the pulley as part of a larger rotational mass diet including an aluminum driveshaft, aluminum flywheel and a set of rFP1s as well. So far I just have the pulley, Perrin drop in and nameless op/dp catted combo on the car, pulley has made the biggest difference by far. Definitely a good bang for your buck mod, and it makes hard shifts smoother as well.

[ramiram1984]

Originally Posted by Vlady

Some pics please? And how much?

PM me. But yours for $100 shipped if interested.

[wootwoot]

Originally Posted by FT-86 SpeedFactory

Straight from Subaru America.

"Thank you for your patience as I checked with our Technical Services Department regarding your message below. They advised that the crank pulley is a pulley and nothing else. It is not used as a harmonic damper/balancer.

Thanks for the opportunity to be of assistance. If you need any future assistance, please feel free to contact us again."

Best wishes,

John J. Mergen
Customer Service Department
Subaru of America, Inc.


There is nothing wrong with replacing the crank pulley. If so our race car with 30K miles, countless track miles and more abuse than most cars would see over 150K miles, especially with a supercharger. If true ours would have grenadeed by now, but it hasn't.

Car myths from the 90's.

BTW we run, Lightweight crank pulley, lightweight water pump pulley, lightweight alternator pulley, add a couple pulleys in for the supercharger, lightweight flywheel, lightweight wheels, different rotors, different wheels, different tires, different final gear, which all connect to the rotating mass of the crank. Zero issues...

There is information that disputes this as engineering prints of Subaru motors show the part to be labeled a "harmonic dampener." If you dig deep enough you can find such information on the internet. By design the part is, in fact, a harmonic dampener. It's necessity is a matter of debate as many people report no issues with them. I personally never thought the slight benefits were worth the serious risk. But that's just me.

Just my 2 cents. Glad you guys are liking them!