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Old 04-07-2003, 06:06 PM   #1
rexxer
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Default Perrin Crank Pulley

I figured there should be a review of this piece individually (not installed with other parts).

I installed this on my 2002 WRX and this is my first and only (so far) performance mod.

The installation only took about 30 minutes, but the trips to the hardware store took a couple hours. Make sure you have EVERYTHING you need before you start (10, 12, 14mm wrenches, 22mm half inch drive socket, 18" breaker bar, torque wrench, WD-40, couple drops of motor oil).

I followed Vishnu's pulley instructions. They are great! Everything was easy to do until it go to the pulley itself. It didn't want to come out. We tried 3 different pullers and none of them fit inbetween the pulley and the fans on the radiator. We ended up having to let some WD-40 soak in and then just get two people to pull and wiggle the pulley for a couple minutes as it slowly came out.

No dyno tests, but the power gain is not noticeable. What is noticeable is the quick throttle response and very smooth driving while not on boost.

Also, the car had no trouble starting of idling at temperatures between -9C and +9C.
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Old 04-07-2003, 11:50 PM   #2
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Cool..would you say it was worth the money? Thanks for the review.
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Old 04-08-2003, 12:17 AM   #3
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This is on my short list for mods as mod money becomes available. Worth doing DIY install? Would a particular tool have made it much easier?

lb
www.trancelab.com
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Old 04-08-2003, 12:59 AM   #4
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I installed mine about two weeks ago, and noticed the difference immediatly. IMHO a worthwile mod. Better/easier rev-matching, better off-idle transition, overall better driveability.

Just follow the instructions, and if the OEM pulley is stubborn, use WD-40 and a rubber mallet to GENTLY persuade it to come loose. DO NOT drop/loose the woodruff key.
DO NOT cross thread the crank bolt.

Good luck
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Old 04-08-2003, 11:17 AM   #5
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Yes, the WD-40 and rubber mallet with another set of hands is the only way to get the stock pulley to budge sometimes.

Then more I drive with this pulley, the more I like it.

For around US$125 it is worth it. By the time it got to me it was about $260 Canadian... still worth it, but slightly less worth it.
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Old 08-17-2003, 11:58 PM   #6
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Does the car noticably pulls harder during acceleration or 'faster'?
I would think this would be the only reason where less rotational mass would be good
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Old 08-18-2003, 10:59 AM   #7
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Short answer... not really. It doesn't pull hard enough to really notice it.

Rev matching is much easier, and your revs drop faster, so you can shift faster... which will make you want to buy a short shifter...
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Old 08-18-2003, 11:15 AM   #8
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Thanks rexxer. IMHO this seems like this is a mod I'd do after I run out of things to add
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Old 08-18-2003, 11:17 AM   #9
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I don't know what you've done so far, but I found the uppipe and engine management to be really good mods.
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Old 08-18-2003, 01:17 PM   #10
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This is the light weight one correct?

And where did you get it for 120?
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Old 08-18-2003, 01:22 PM   #11
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Nino's Auto Accessories. They usually have a bunch of these Perrin Lightweight crank pullies:

Nino's post
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Old 08-18-2003, 01:23 PM   #12
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[rexxer] performance wise Nada. yep those are on exactly on my list. I'm thinking of TurboXS UTec then maybe uppipe. Trying to avoid as much physical eng. mods as possible for warranty

I second Nino's. Got all my mods from him. A great personable guy. Just PM him or call.
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Old 08-18-2003, 01:25 PM   #13
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I ended up buying a used unichip for Vishnu Stage 0 (oldschool -- uppipe, crank pulley, MBC, sparkplugs) after I installed the uppipe and crank pulley. WOW... what a difference! I do throw a CEL once in a while, though.
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Old 08-20-2003, 11:29 AM   #14
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Just to chime in, I have the AutoSpeed Performance pulley, and I believe it is nearly identical to the Perrin - perhaps a little bit heavier, if anything. And I confirm what these other guys are saying-- no real noticeable "power" increase, but engine rev's more freely, easier heel/toe, revmatch, and "shifting" IMHO.
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Old 08-28-2003, 11:47 AM   #15
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what did you guys tighten the 22mm bolt that holds the pulley in at?

<110 ft-lb for me
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Old 08-31-2003, 11:02 AM   #16
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Vishnu Tuning's installation instructions are defininitely more useful than the accompanying Perrin instructions.

Getting the original pulley off the shaft wasn't that difficult for me. It was stuck in, but after 5 minutes of soaking in Liquid Wrench, it slid off with almost no effort! Maybe it's because I only have 2000 miles on my car (no gunk has accumulated).

The most difficult part is getting that @!#$@ alternator belt back on!

I torqued mine to 100ft-lb.

I dunno if I feel any extra horsepower, but at low RPMs, I do imagine feeling a little extra torque when I'm engaging the clutch in 1st gear. Shifting has also gotten "easier".
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Old 09-02-2003, 11:00 AM   #17
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Thumbs up

No dyno or anything, but I have this installed as my first real performance MOD(I had only a AEM CAI at the time) and I also have a 4EAT. I noticed a difference in spool up time. That's it. The power difference I'm sure is minimal, but I definately noticed a speed increace. You lose lag, that's the best way to describe it. It's worth the like 130 bucks I paid for it. It's chump change as far as speed boosting is concerned. I had the dealer install it because I did not have a tourque wrench. about 30k miles with it on now, not a single issue/problem/CEL. I now have full exhaust mods and a grounding kit. The grounding kit had a similar "lag-reducing" effect for me, only the grouding kit killed a quick stutter I had, while this is a more smooth effect over the low/mid RPM range.


Adam
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Old 09-02-2003, 11:16 AM   #18
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Quote:
Originally posted by phasedlife
No dyno or anything, but I have this installed as my first real performance MOD(I had only a AEM CAI at the time) and I also have a 4EAT. I noticed a difference in spool up time. That's it. The power difference I'm sure is minimal, but I definately noticed a speed increace. You lose lag, that's the best way to describe it. It's worth the like 130 bucks I paid for it. It's chump change as far as speed boosting is concerned. I had the dealer install it because I did not have a tourque wrench. about 30k miles with it on now, not a single issue/problem/CEL. I now have full exhaust mods and a grounding kit. The grounding kit had a similar "lag-reducing" effect for me, only the grouding kit killed a quick stutter I had, while this is a more smooth effect over the low/mid RPM range.


Adam
wow your dealer did it for u!!! my dealer wouldnt even put on an oem sway bar for me...
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Old 09-02-2003, 07:21 PM   #19
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Damn dude you could have picked up a torque wrench for half or less than what you paid your dealer to put it in.
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Old 09-02-2003, 07:32 PM   #20
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Quote:
Originally posted by 0260B4U
Damn dude you could have picked up a torque wrench for half or less than what you paid your dealer to put it in.
heh - it was a pretty hard install though dont you think? i ended up taking out my fan shroud and disconnecting a radiator hose.


and i had the 4eat issues - had to put a breaker bar in TC
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Old 09-03-2003, 10:54 AM   #21
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The removal of the stock pulley was a PITA, but the rest was easy. Do an uppipe install and you'll know what a hard install is!
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Old 09-09-2003, 01:51 PM   #22
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Yes, uppipe... gigantic hemerroidal PITA.
<= Trys to remove and keep track of a hundred nuts and bolts


I looked at doing the pulley by myself. I have a breaker bar and a torque wrench now but at the time I did not. I did not feel confident and that's the bottom line. I knew they would do a good job and tension all the bolts and belts correctly,... etc. It was expensive to get it installed but Pence Subaru did not even blink at the oppertunity to make me happy and profit at the same time. Not to mention they have a reason to void my warranty now on whatever, I'm sure. If I had to do it again, I'd do it myslef and do it right.


Adam
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