Crankshaft Pulley

[ensteele]

I am looking for a crankshaft pulley. I can go to a one piece or the OEM. I have found that the OEM is $148.00 + shipping, and Motorsports has a lightweight one piece for $140.00. Are there any other options besides a used one? I really don't want to go that way. Any thoughts? Thanks in advance.

[redlightningsvx]

$115 shipped http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT

[LetItSnow]

If you're not opposed to a used lightweight (one piece - how can you go wrong?) they're easy to score on NASIOC.

[michael]

Originally Posted by ensteele

I am looking for a crankshaft pulley. I can go to a one piece or the OEM. I have found that the OEM is $148.00 + shipping, and Motorsports has a lightweight one piece for $140.00. Are there any other options besides a used one? I really don't want to go that way. Any thoughts? Thanks in advance.

If you can wait keep checking ebay for subaru harmonic balancer or crank pulley. I'm pretty sure all 95 +up subarus all use the same pulley. Not so sure about pre 95. I'm in the process of putting one from my outback on my SVX.

[Mike621]

Earl, I am running a black aluminum Perrin pulley on my Claret. It is the stock diameter and I will be ordering a second one for my Ebony.

$90 + Shipping on ebay

http://cgi.ebay.com/ebaymotors/Perri...Q5fAccessories

[alia176]

The original intent of this pulley is to be a harmonic balancer so can I assume that going with a one piece, billet alum with no shock absorbing rubber is ok? Just curious, that all!

[Crazy_pilot]

There is a disclaimer on Perrin's website that states the pulley may adversely affect engine life. I think that's more in response to a lot of arm waving by "informed" internet people than actual fact though.

[SoCal LS-L]

Originally Posted by alia176

The original intent of this pulley is to be a harmonic balancer so can I assume that going with a one piece, billet alum with no shock absorbing rubber is ok? Just curious, that all!

Horizontally opposed engines need no harmonic balancer. Thats only for V and straight block.

[oab_au]

Originally Posted by SoCal LS-L

Horizontally opposed engines need no harmonic balancer. Thats only for V and straight block.

Whoo on there a cotton picken minuet.

The difference is in the word "harmonic balancer" it is used to move the crankshaft's critical harmonic frequency, to a rev range that does not get used for too long a period.
The longer the crank, the worse it is.

It prevents the crank from developing a fatigue crack.

Harvey.

[alia176]

Originally Posted by oab_au

Whoo on there a cotton picken minuet.

The difference is in the word "harmonic balancer" it is used to move the crankshaft's critical harmonic frequency, to a rev range that does not get used for too long a period.
The longer the crank, the worse it is.

It prevents the crank from developing a fatigue crack.

Harvey.

Makes sense, hence the specific weight of the unit tuned to a specific freq.

Thanks.

[ensteele]

Originally Posted by redlightningsvx

$115 shipped http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT

Will this one fit the SVX? Same size etc?

[SoCal LS-L]

Originally Posted by oab_au

Whoo on there a cotton picken minuet.

The difference is in the word "harmonic balancer" it is used to move the crankshaft's critical harmonic frequency, to a rev range that does not get used for too long a period.
The longer the crank, the worse it is.

It prevents the crank from developing a fatigue crack.

Harvey.

Ok im thinking balance shaft or counterweights on the crank...... with a crank about 3 cylinders long hopefully the H6 doesn't suffer from this too much anyways.

[Trevor]

There is a disclaimer on Perrin's website that states the pulley may adversely affect engine life. I think that's more in response to a lot of arm waving by "informed" internet people than actual fact though.

So all the hundreds of engineers, since engines have been produced, are stupid and manufacturers are intent on adding to the cost of their product and don't give a damn about the bottom line.

Perrin are not joking, they are clearly protecting their back sides. They are not stupid and know they are on shaky ground, when working the pseudo thinkers market.

It is not difficult to understand what is missing when a solid pulley is fitted, i.e. a torsional shock absorber. As a side issue, the items flexible belt driven by the pulley and in particular the alternator, also represent excellent damping. All of this at the opposite end of the crank to the driving end, for very good reason. The combined absorbent elements in torsion absorb and flatten off the peaks in what is otherwise intermittent rotational speed.

In time the pulley fails, because it has had the guts shaken out of it, while performing a valuable function. Why not replace shot shocks with lumps of aluminium, and save unsprung weight?

The layman's theory that a flat or V engine has perfect balance is bull$hit. Better yes, but far from perfect, and the particular forces involved do not enter the high frequency range, applicable in this instance.

Prom a performance aspect, The reciprocating weight of the pulley and its small diameter make it nothing, in comparison to the rest of the reciprocating weight of the shaft. Many can no doubt feel the difference, a necessary sensation, having felt the thinning of their wallet.

[alia176]

Originally Posted by Trevor

The layman's theory that a flat or V engine has perfect balance is bull$hit. Better yes, but far from perfect, and the particular forces involved do not enter the high frequency range, applicable in this instance.

A very accurate statement.

[LetItSnow]

Certainly don't take this the wrong way, but it does also stand to question just how many miles the particular car is anticipating seeing in its lifetime.