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.

http://i13.photobucket.com/albums/a2...ps5b790773.jpg
http://i13.photobucket.com/albums/a2...ps7041c878.jpg
http://i13.photobucket.com/albums/a2...ps841c7e46.jpg
http://i13.photobucket.com/albums/a2...pse8306832.jpg

are they just lightweight, or are they under drive?

Just lightweight.

nice job!

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.

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)

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.

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.

^ 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.

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.

Thanks guys! got a lot of good insight.

What is the torque spec for the alternator and water pump pulley ?

alternator nut: 108 Nm / 80 ft lbs
water pump bolts: 14 Nm / 10 ft lbs

then again, the service manual says 15 ft lbs + 90* for the crank pulley. assuming that equates to 94 ft lbs, the torque specs are correct

I think you'll find that means torque to 15ft/lbs then turn the bolt a further 90 degrees from there. A lot of modern cars have bolts that are tightened by degrees instead of a torque i believe.

-

Where did you get them from and how much they set you back?

yes...... thats why im saying if it equates to 94 ft lbs, then the other torque specs are to be trusted

You can get them online from one of the most trusted websites for this car:http://ft86speedfactory.com/go-fast-...234b62f0a3a540

They cost $345 without shipping and handling, I don't know what he got them for, but there is also another kit that gets similar performance:
http://ft86speedfactory.com/tomioka-...234b62f0a3a540

but costs $316

The latter is 0.64 lbs heavier not that much weight still and won't make as much of a difference but it should be noted, also tomioka apparently dynoed them and gained 10 WHP which I'm not so sure about pulleys do free up horsepower but not that much, the gains from both of them will be similar and anything that lowers power loss and load on the motor is a good thing.

-

Much appreciated mate.

No problem its a good performance investment.

Looks like it mate. Tomioka looks like they have the Alternator and Water pump much lighter than the competitors. hmmmmm I will investigate to see if they sell it separately.

eBay and $250 shipped new.