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Old 05-11-2011, 08:19 PM   #1
ofspunk7
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Talking UNOFFICIAL (but super awesome) GrimmSpeed Crank Pulley - Product Review

GrimmSpeed Crank Pulley - Product Review

“They not only look cool but there is absolutely zero cons for this particular mod. GrimmSpeed FTW!” - Modern Automotive Performance


I am not sure if I can sum up this modification any better. This product really has no downside!




Car: 2009 WRX – E85 and other goodies
Owned Mod for: About a month
Issues / Problems: None


The first thing you will notice is that I did not get one of the pretty colored pulleys. I guess that is the small price I pay for being a tester.

The purpose of this modification is to get rid of the OEM pulley. The OEM setup is heavy, this weight is not only not necessary, but it can lead to failures. Just like many of the decisions that make up our stock cars, it fits the budget. GrimmSpeed saw this issue as an opportunity to better our engine setup. This pulley is 3.5lbs lighter and constructed better than the OEM setup. This pulley is balanced CNC machined 6061 T6 anodized aluminum to the optimal weight to not make the ECU / Engine mad (CELs or Hesitation)…. Oh and it has pretty colors.

What did I notice once this was installed on my car? Well 1st thing I noticed was that the idle was better… call me crazy but my car felt smoother. I had recently tuned my car from E85 to pump gas for a road trip, my main issue prior to this install we the idle. This pulley was installed and the first thing I noticed was that my car seemed to be running smooth. It really stood out to me. In a way I am glad that this was installed for the 2 weeks I was back on pump gas…. Otherwise I might not have noticed this as much. Now I am back on the corn (E85) and the car is running like butter. The REV’s did come faster as well. This is due to the lighten load on the engine. The removal of 3.5 LBS on your engine results in less of a rotational mass, which means your engine wastes less power on your pulley…. More power for you!

Why else should you buy this product? The installation and removal tool is such a great idea that it doesn’t surprise me that GrimmSpeed was the first company to come out with it. Not only does it work for your OEM setup, but it also works for their pulley. One tool to remove and upgrade my setup is always a nice thing to have. As well, if you have a 2009 WRX (08+) GrimmSpeed is the only one who offers an aftermarket stretch belt installation kit.


Would I recommend this product? YES!

Thanks to everyone @ GrimmSpeed, once again you have given birth to top of the line products for the aftermarket Subaru community.


Link to Product Release ….. Click Here

Link to GrimmSpeed ….. Click Here




EDIT: Adding Video (of my car )

Link to the YouTube DIY

http://www.youtube.com/watch?v=R4w3t...ature=youtu.be
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Last edited by ofspunk7; 01-11-2012 at 02:43 PM. Reason: Adding Video
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Old 05-11-2011, 11:54 PM   #2
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Awesome review ofspunk!! Thank you very much for taking the time to do a review like this. I'm glad you are enjoying the pulley!

Justin Grimm
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Old 05-12-2011, 12:06 AM   #3
ofspunk7
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Well it's easy to write good reviews when you put out quality products. Thanks for setting such a high benchmark for the rest of the companies out there. GrimmSpeed seems to be setting the bar pretty high with quality products, problem solving, and keeping it a step above the rest. Keep it up, I look forward to what's next.
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Old 05-12-2011, 05:59 PM   #4
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Bumping mine to put next to the "official" thread.... lol
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Old 05-12-2011, 06:01 PM   #5
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haha yes!!

Will
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Old 05-13-2011, 02:00 PM   #6
ofspunk7
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Bump - YouTube DIY video link added for this product.




http://www.youtube.com/watch?v=R4w3t...ature=youtu.be
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Old 05-13-2011, 03:00 PM   #7
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interested in this...getting into autocross and feeling how long the 5speed ratio is i could use some quicker revs on certain courses.

nice review
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Old 05-13-2011, 07:23 PM   #8
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What's the actual weight? 3.5lbs lighter than OEM = ??
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Old 05-13-2011, 09:57 PM   #9
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Quote:
Originally Posted by bemani View Post
What's the actual weight? 3.5lbs lighter than OEM = ??
Yeah that might be important huh. It is 2lbs.


Justin Grimm
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Old 05-15-2011, 02:47 PM   #10
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great review
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Old 05-18-2011, 02:05 AM   #11
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Quote:
Originally Posted by krauser2 View Post
interested in this...getting into autocross and feeling how long the 5speed ratio is i could use some quicker revs on certain courses.

nice review

This will definitely give you that!

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Old 05-18-2011, 12:33 PM   #12
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How does it compare to the KB pulley that's $45 less expensive? Obviously, there are three colors to choose from and the pulley puller. That aside, without raining on the GS parade, why would someone spend an extra $45 on this pulley?
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Old 05-19-2011, 05:31 PM   #13
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Quick question, do you notice an increase in how fast the rev drops during off throttle condition? Or, during shifts? Thanks.
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Old 05-19-2011, 09:34 PM   #14
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Quote:
Originally Posted by A5un View Post
Quick question, do you notice an increase in how fast the rev drops during off throttle condition? Or, during shifts? Thanks.
Good question, I had the same one after the install. I have to say if there is any difference at all I do not notice it or didn't pay enough attention prior to the install. However, that isn't to say there isn't a difference. i noticed that it revs faster, but the drop seems the same or similar.
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Old 05-20-2011, 02:23 AM   #15
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^
Great, thanks for the info. I recently put on some Works XD9, which were supposed to be lighter (?) than stock wheels. But my arms tell me they're slightly heavier when I was putting them on. It may be a minor difference, but I really feel it. This is especially true when taking off. The same goes for shifting, the rev drops slower due to the increase in mass to keep that rotational momentum going. I just wanted to make sure that I'm not in over my head with these lightened pulley. Thanks for the reply!
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Old 08-08-2011, 08:31 AM   #16
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Just wanted to give an update since I have had this on my car for a while now. I am still loving this modification 100%. The car just seems to run better all around. The idle is super smooth and the driving is just as great. I guess I wouldn't expect anything less from GrimmSpeed, they always know they are putting quality parts out there when they release something new. Thanks again GrimmSpeed I am really happy I have this on my car!


Anyone else loving theirs?
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Old 08-08-2011, 11:57 PM   #17
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I'm doing my timing belt at the end of August, so I picked this up figuring I might as well do it while im in there.
I'm pretty excited to get this part on. Looks nice in the blue and feels pretty light weight just to be held in hand
looking forward to it
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Old 08-10-2011, 09:13 AM   #18
ofspunk7
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Quote:
Originally Posted by wrxbungs View Post
I'm doing my timing belt at the end of August, so I picked this up figuring I might as well do it while im in there.
I'm pretty excited to get this part on. Looks nice in the blue and feels pretty light weight just to be held in hand
looking forward to it

It is amazing how the car just changes to a smooth running machine with this mod. You will be very happy with the difference that it makes. Make sure to update this thread with your first impressions and then again after you have had it for a while. Spread the word of good parts!
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Old 08-12-2011, 09:49 AM   #19
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Yeah we love to hear initial impressions as well as a good hard long road test for it! I put one on my wrx and have been loving the feel of it, also makes the car "smoother"

Will
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Old 08-13-2011, 06:51 PM   #20
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Driving with the AC on is smoother. i dont have to rev high to make the shift smoother. Driving with the AC(new pulley) is like driving normally with the stock pulley(no AC). haha if that makes sense.
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Old 08-13-2011, 10:22 PM   #21
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Anything to help with summer driving with the AC on I'm in for. The 2.0T really seems to be an unhappy engine when the AC is running. This part is definitely in my plans at some point.
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Old 08-17-2011, 09:15 AM   #22
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Quote:
Originally Posted by microwave View Post
Driving with the AC on is smoother. i dont have to rev high to make the shift smoother. Driving with the AC(new pulley) is like driving normally with the stock pulley(no AC). haha if that makes sense.

Yeah I follow you. It is nice the difference this pulley makes.


Quote:
Originally Posted by cardude007617 View Post
Anything to help with summer driving with the AC on I'm in for. The 2.0T really seems to be an unhappy engine when the AC is running. This part is definitely in my plans at some point.

You won't be sorry. Make sure to let us know how you feel about the pulley. The more info people can get on this awesome part the better!
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Old 08-18-2011, 02:09 AM   #23
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Question which may not be overly scientific given the other variables, but, in your trip after installing the pulley and going back to pump gas did you see an increase in fuel economy?

Just wondering...
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Old 08-18-2011, 09:45 AM   #24
ofspunk7
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Quote:
Originally Posted by EAGLE 5 View Post
Question which may not be overly scientific given the other variables, but, in your trip after installing the pulley and going back to pump gas did you see an increase in fuel economy?

Just wondering...

I am sorry I can't answer that because I had other mods put on during that time that would have affected the MPGs. My MPGs did go up but with the pulley I also installed a new TMIC and BPV. So I am guessing the pulley + the better and colder air flow helped with my increase in MPGs. I don't remember what I was getting for pump gas, but I know my E85 went up about 3 MPGs. Now I did get a new tune when going back to E85.... so there are a lot of changes that were made to the car that resulted in the +3 MPGs. However, without a doubt in my mind, the car runs 100% smoother.
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Old 10-20-2011, 03:17 AM   #25
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What about a Cobb pulley? It seems to be even lighter.
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