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Old 07-29-2010, 02:46 AM   #1
blckout7
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Default Help Item In Cart, But 2nd Thoughts...

Im about to order my agency power lightweight crank pulley but having my second thoughs about it after my extensive research and now hesitant and having some internal conflict lol..

Research tells me

Try to stay away from an underdriven pulley as it can lead to problems especially with alternator, belts and so on..( i know there are plenty of people who have them no problem)

That eliminates that, now on to the Lightweight crank pulley. Based on research in other threads best bet is the OEM sized lightweight pulley correct?

In my 4EAT engine i believe a the pulley im about to order shouldnt have any problems right, especially since i dont plan to change any kind of flywheel of some sort or lightnen anything else right?

Also from what i understand, Impreza's using there H4 Flat four engine(i think)have one of the shortest crankshaft therefore not needing any kind of harmonic dampener right?

I believe from what i learned the stock pulley has no dampner on it, its just a 6lb heavy chunk of metal, that can be replaced with a lighter one no problem right?

I just dont want to buy it and run into problems (i know people have none, some do)

I know the benefit isnt overall that significant, but plan to buy it and hope someone could reconfirm this for me, greatly appreciated guys thanks!!!

p.s this is the pulley, http://www.rallitek.com/Lightweight-...-Pulley/p-4532
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Old 07-29-2010, 03:50 AM   #2
SonicDani
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I have that pulley, its been on for about 10,000 miles and no problems yet. Just know, installing it on a 4EAT is gonna suck.
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Old 07-29-2010, 05:21 AM   #3
ChronicHerb
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Quote:
Originally Posted by SonicDani View Post
Just know, installing it on a 4EAT is gonna suck.
Please elaborate. I know that with the 08+ models, one of the 2 tensioner bolts is no longer there so the belt needs to be stretched onto the pulley. The instructions for the perrin pulley say to put a 5MT in 5th gear so the pulley can be turned by hand. is there no way to do this with 4EAT?
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Old 07-29-2010, 05:30 AM   #4
flightwatch
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It's incredibly simple to get the bolt off if you use a little common sense. Think stuck bolt on an engine that "turns."
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Old 07-29-2010, 07:28 AM   #5
LetItSnow
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It goes beyond that installation could be a trick - a lightweight pulley on an automatic transmission equipped car only equates to bling. After you factor in the entire driveline, the tiny amount of mass removed at its tiny moment of inertia is practically inconsequential. Put the money in your Lighter Wheels Fund.
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Old 07-29-2010, 07:38 AM   #6
blckout7
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Did that bbs sti rims on the car =) $250 friendly neighbor and I was thinking to bring it to my buddy who is a mechanic for the install if I bought it
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Old 07-29-2010, 08:33 AM   #7
dstan
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Like letItSnow said save your money for something that matters
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Old 07-29-2010, 10:51 AM   #8
blckout7
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Im getting a headache with all this research, general consensus says installing one is fine and they mention how've they had them on for years no problem, while there is many who say its harmful or not worth it....

after hybrid intake, tuned on 93 octane, and catback exhaust im noticed huge gains and overall better driveability. i think i may lean to not putting in the pulley, perhaps save up for some suspension upgrades.....but still undecided lol
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Old 07-29-2010, 11:08 AM   #9
chazly413
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The reason us manual guys get lightweight pulleys or lightweight flywheels is for quicker revs during downshifts. That's about it .
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Old 07-29-2010, 11:22 AM   #10
blckout7
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Otherwise it's not really signiificant on an automatic right?

I don't this is many more affordable mods I could to do a automatic right? For hp gain that is? Maybe I should look into suspension but what to do first...
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Old 07-29-2010, 11:26 AM   #11
chazly413
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motec system exhaust-RIP

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You can still do headers.
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Old 07-29-2010, 11:31 AM   #12
blckout7
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I considered but NY by me strict as been ticketed twice already for "loud muffler" I can only
Imagine after headers lol
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Old 07-29-2010, 12:13 PM   #13
LetItSnow
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Quote:
Originally Posted by chazly413 View Post
The reason us manual guys get lightweight pulleys or lightweight flywheels is for quicker revs during downshifts. That's about it .
YES.

It's not going to make a difference in vehicular acceleration, and it won't do a thing for an automatic. None of us have a choice in regards to how physics influences us and the things around us, and if you do some quick math on how all of the mass after the flywheel adds up (as rotational mass!) a pulley becomes quickly lost in there.
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Old 07-29-2010, 12:27 PM   #14
blckout7
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Thank you guys
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Old 07-29-2010, 12:54 PM   #15
chazly413
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motec system exhaust-RIP

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Quote:
Originally Posted by blckout7 View Post
I considered but NY by me strict as been ticketed twice already for "loud muffler" I can only
Imagine after headers lol
I mean... Headers don't have any kind of mufflers in them as it is. But you do have an 06 which has the cat built into it.. Yeah, it would be a little more trouble for you than for me, whereas I can just bolt it up, you'd have to get more than just the header to get it to work.

If you ever get bored in the future, you should definitely look into it, it'll definitely increase your torque.
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