Go Fast Bits 3pc Lightweight Crank Pulley - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

VietnamPhenom · 05-31-2013, 11:53 PM

I just got my GFB pulleys and installed. I really like this mod. Makes the car a little bit more lively. Revs are quicker, accleration is more responsive, and overall a great mod to have. I did install this myself. Taking off the water pump pulley is really easy. While the belt is still on, use a 10mm wrench or socket/ratchet combo and loosen the bolts. The belt itself will apply tension for you loose to the bolts off the water pump. Remove and place the new pulley on. Thread all the bolts on and reattach the belt. Use the belt's tension to tighten the water pump bolt.

As for the alternator and crank pulley, I used a chain wrench to hold each pulley stationary while using a breaker bar and socket to loosen it. The alternator nut is a 24mm while the crank is a 22mm. Remember to torque down the crank pulley to 95 ft. lbs.

Sorry for the crappy cell phone pics.

EZWood · 06-01-2013, 12:56 AM

are they just lightweight, or are they under drive?

VietnamPhenom · 06-01-2013, 01:52 AM

Just lightweight.

Alabang 86 · 06-01-2013, 02:15 AM

nice job!

T-SoL · 06-25-2013, 02:37 AM

Hey i see that its been about a month since upgraded to GFB. How is it so far? Can you tell us about your experience i am planning on doing the same thing and GFB is the lightest combo you can get. also @EZWood mention "are they just lightweight, or are they under drive?" what is the difference? i have no idea what u are talking about so please educate me. Thanks in advance

Grymm86 · 06-25-2013, 12:34 PM

Quote:

Originally Posted by T-SoL

Hey i see that its been about a month since upgraded to GFB. How is it so far? Can you tell us about your experience i am planning on doing the same thing and GFB is the lightest combo you can get. also @EZWood mention "are they just lightweight, or are they under drive?" what is the difference? i have no idea what u are talking about so please educate me. Thanks in advance

Lightweight pulleys are just that, light weight and the same diameter as stock. an underdrive pulley on an accessory will have a slightly larger diameter and will rotate the component slower than designed.

SloS14 · 06-25-2013, 12:52 PM

When you say the car accelerates faster, do you mean like a hundredth of a second 0-60? I don't see lightweight pulleys doing much more than that.

Trashed675 · 06-25-2013, 01:08 PM

Quote:

Originally Posted by SloS14

When you say the car accelerates faster, do you mean like a hundredth of a second 0-60? I don't see lightweight pulleys doing much more than that.

They don't make a crazy difference, but it should be noticeable. Roughly the same as an intake or catback exhaust. It might drop a tenth off of your 0-60, but it should also improve your fuel economy because the engine doesn't have to work as hard to move the pulleys. Again, its only a small difference(probably less then 1mpg), but its a relatively cheap and easy mod with basically no down side.

@VietnamPhenom how long did it take you to install all 3? I put just a crank pulley in my old tC and that took me maybe half an hour(didn't know exactly how to do it)

VietnamPhenom · 06-25-2013, 01:20 PM

As what everyone said, they are a lightweight pulleys. They don't make a "huge" difference, but they do make a difference. Throttle repsonse is quicker, and the revs are slightly faster then stock. Somedays I don't realize that I'm already doing 50 in 3rd. (in a 40 mph zone)

As far as time, it took me around an hour to do all 3. If you have the proper tools, the install will be easy to do. The water pump pulley is the easiest to remove. The alternator will have to be kept stationary, or if you have an impact gun fast enough to take the nut off. The crank was fairly easy, put the car into 6th and use a breaker bar with a 22mm socket and just give it a yank. Make sure you torque down the crank pulley bolt, and alternator nut. The water pump bolts can be snug.

SloS14 · 06-25-2013, 02:10 PM

Quote:

Originally Posted by VietnamPhenom

Somedays I don't realize that I'm already doing 50 in 3rd. (in a 40 mph zone)

What does that have to do with the pulleys?

Trashed675 · 06-25-2013, 03:05 PM

Quote:

Originally Posted by SloS14

What does that have to do with the pulleys?

Probably that he didn't realize he was going that fast because it was easier to get up to speed.

VietnamPhenom · 06-25-2013, 04:11 PM

^ What he said. It is easier to get up to speed with the pulleys. Overall it is a good mod. I haven't had any problems with thus far. I've put roughly around 2k miles on it. NO CEL or any sort of complications.

UncleFester · 06-25-2013, 04:21 PM

Perhaps I should have tried a chain wrench on the alternator. I ended up disassembling it to get the pulley off.

I'm happy with it, its a nice kit. I can't say I feel a difference as I installed it in part with a lot of other mods.

T-SoL · 06-25-2013, 09:40 PM

Thanks guys! got a lot of good insight.

05-31-2013, 11:53 PM	#1
VietnamPhenom Member Join Date: Sep 2012 Drives: 2013 FR-S WHITEOUT Location: Aurora, CO Posts: 61 Thanks: 1 Thanked 28 Times in 18 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Go Fast Bits 3pc Lightweight Crank Pulley I just got my GFB pulleys and installed. I really like this mod. Makes the car a little bit more lively. Revs are quicker, accleration is more responsive, and overall a great mod to have. I did install this myself. Taking off the water pump pulley is really easy. While the belt is still on, use a 10mm wrench or socket/ratchet combo and loosen the bolts. The belt itself will apply tension for you loose to the bolts off the water pump. Remove and place the new pulley on. Thread all the bolts on and reattach the belt. Use the belt's tension to tighten the water pump bolt. As for the alternator and crank pulley, I used a chain wrench to hold each pulley stationary while using a breaker bar and socket to loosen it. The alternator nut is a 24mm while the crank is a 22mm. Remember to torque down the crank pulley to 95 ft. lbs. Sorry for the crappy cell phone pics.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
any info or diy on the go fast bits pulley set	fluffy-reindeer-slayer	Engine, Exhaust, Transmission	2	07-17-2013 10:13 AM
FS: Kartboy Lightweight Crank Pulley	OrbitalEllipses	Engine, Exhaust, Bolt-Ons	6	03-21-2013 09:21 AM
Go Fast Bits Lightweight Pulley Kit on sale & Free Shipping @ Circuit Motorsports	Circuit Motorsports	Engine, Exhaust, Bolt-Ons	58	03-20-2013 03:07 PM
My lightweight crank pulley experience	WolfsFang	Engine, Exhaust, Transmission	22	11-29-2012 03:15 AM
Ralco RZ Lightweight Crank Pulley HELP!	JERZgrl88	Engine, Exhaust, Transmission	11	10-10-2012 01:41 PM

06-01-2013, 12:56 AM	#2
EZWood BAMF Join Date: Jun 2012 Drives: 13 fr-s, whiteout, MT. 94 ZJ Location: Apache Junction, Az Posts: 1,007 Thanks: 209 Thanked 345 Times in 215 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	are they just lightweight, or are they under drive?

06-01-2013, 01:52 AM	#3
VietnamPhenom Member Join Date: Sep 2012 Drives: 2013 FR-S WHITEOUT Location: Aurora, CO Posts: 61 Thanks: 1 Thanked 28 Times in 18 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Just lightweight.

06-25-2013, 02:37 AM	#5
T-SoL Member Join Date: Sep 2012 Drives: Ultramarine FR-S MT Location: Bellevue, WA Posts: 40 Thanks: 10 Thanked 7 Times in 6 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Hey i see that its been about a month since upgraded to GFB. How is it so far? Can you tell us about your experience i am planning on doing the same thing and GFB is the lightest combo you can get. also @EZWood mention "are they just lightweight, or are they under drive?" what is the difference? i have no idea what u are talking about so please educate me. Thanks in advance

06-25-2013, 12:52 PM	#7
SloS14 Senior Member Join Date: Apr 2013 Drives: 2013 FR-S whiteout Location: United States Posts: 726 Thanks: 381 Thanked 652 Times in 256 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	When you say the car accelerates faster, do you mean like a hundredth of a second 0-60? I don't see lightweight pulleys doing much more than that.

06-25-2013, 01:20 PM	#9
VietnamPhenom Member Join Date: Sep 2012 Drives: 2013 FR-S WHITEOUT Location: Aurora, CO Posts: 61 Thanks: 1 Thanked 28 Times in 18 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	As what everyone said, they are a lightweight pulleys. They don't make a "huge" difference, but they do make a difference. Throttle repsonse is quicker, and the revs are slightly faster then stock. Somedays I don't realize that I'm already doing 50 in 3rd. (in a 40 mph zone) As far as time, it took me around an hour to do all 3. If you have the proper tools, the install will be easy to do. The water pump pulley is the easiest to remove. The alternator will have to be kept stationary, or if you have an impact gun fast enough to take the nut off. The crank was fairly easy, put the car into 6th and use a breaker bar with a 22mm socket and just give it a yank. Make sure you torque down the crank pulley bolt, and alternator nut. The water pump bolts can be snug.

06-25-2013, 04:11 PM	#12
VietnamPhenom Member Join Date: Sep 2012 Drives: 2013 FR-S WHITEOUT Location: Aurora, CO Posts: 61 Thanks: 1 Thanked 28 Times in 18 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	^ What he said. It is easier to get up to speed with the pulleys. Overall it is a good mod. I haven't had any problems with thus far. I've put roughly around 2k miles on it. NO CEL or any sort of complications.

06-25-2013, 04:21 PM	#13
UncleFester Senior Member Join Date: Jun 2012 Drives: BRZ Location: Northern Virginia Posts: 597 Thanks: 157 Thanked 178 Times in 120 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Perhaps I should have tried a chain wrench on the alternator. I ended up disassembling it to get the pulley off. I'm happy with it, its a nice kit. I can't say I feel a difference as I installed it in part with a lot of other mods.

06-25-2013, 09:40 PM	#14
T-SoL Member Join Date: Sep 2012 Drives: Ultramarine FR-S MT Location: Bellevue, WA Posts: 40 Thanks: 10 Thanked 7 Times in 6 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Thanks guys! got a lot of good insight.

User Name		Remember Me?
Password