3sx underdrive pulleys

[shty]

anyone have problems?

[ispro]

vr4 owns. how can the pulley affect how quick the rpm's drop, i'm getting the flywheel and the underdrive lightened pulley... i dont' see it tho.?? elaborate plz? anyone else out there kno, i've heard it's a good combo... -matt

[VR4Launch]

i have the 3sx crank pulley, and it seems to help with the acceleration. the RPMs dont drop that fast .... i like it

[KurvKutr]

The 3sx crank pulley is like 5lbs lighter than stock. The obvious is it takes weight off the crank(just like a lightened flywheel), allowing the engine to rev faster. After I put the pully on, the car pulled harder especially around 3k. Definitly the best bang for your buck in any car. The only problem I had is my ac belt screams when I turn it on, but thats probably just loose.

As far as rpm's dropping i've heard of this, but don't notice it in my car. The basic concept is the heavier stock pully helps keep momentum of the engine turning when your off the gas. But if you think about it, when your using that power (racing), your shifting too quick to let the rpm's drop, right?

[pogophil]

i had one installed on my na (loved it) and on my tt (loved it). great mod, noticeable hp. i think you should go for it!

[shty]

I have one but im still debating about installing it, cause of the fact that it doesnt have a harmonic balancer....

[Greenstealth]

Originally Posted by ks3kgt

the only thing i would be aware of is the fact that you alternator and a/c won't be working as hard. If you had a big stereo or a spyder model i would probably shy away from underdrive pulleys. Also keep in mind if you live in a place like i do that is super humid in the summer or if you spend a lot of time stop and go driving or both that your a/c is gonna have a noticable differance. If you spend a lot of time on the highway i doubt you would be able to tell. Since the water pump is seperate and the fans are obviously electric i don't really see any harm in underdrive pulleys i just think you need to be aware of the creature comfort effects.

The 3sx pulley isnt underdriving. Its just lighter.

[mikes2nd]

if your belts are making noise?

what belts do you have?

i just got goodyear "quiet" gatorbacks

[KurvKutr]

Originally Posted by mikes2nd

if your belts are making noise?

what belts do you have?

i just got goodyear "quiet" gatorbacks

Same here, but like I said, I just threw it on and started it up. I just never got back under it to tighten it up.

[ks3kgt]

Originally Posted by Greenstealth

The 3sx pulley isnt underdriving. Its just lighter.

If that is the case go for it. Also keep in mind that stock pulleys don't have much of a harmonic dampener. It's only a bit of rubber in there. It's not a liquid filled dampener like the detroit rust buckets that need to add things to their motors to dampen them. I'd figure as long as the aftermarket pulley is balanced it would be just as good as anything else. I've even owned cars that had no dampeners OEM like MG and VW