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Aluminium Underdrive pulley?

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#24 ·
I run one right now, and havent had any problems but im going to switch back to a stock one just to be safe.

One thing i did notice after is that when im in neutral and i rev the car high, The shifter moves a little bit.
 
#25 ·
Old thread, but still, need to make something clear for myself. I bought my GSX with underdrive pulleys on it...and of course I forgot to ask for the OEM. Where would be a good place to look for whatever I need, and what do I need to do...please remember I am very new to this.
 
Discussion starter · #28 ·
Well, might as well update my thread. They have been on since about 9-17-07 and no symptoms of any damage or odd things happening. It's been about 3000+ miles.
 
#29 ·
eagle claw said:
Here on the forum, junk yard, or the dealer.
Click to expand...
I disagree with getting one from a junk yard or even buying one used in general................... Unless you KNOW the actual mileage on that dampener.

Fliudamper being my only personal exception.


My opinion is that if I'm in need of a replacement I'm gonna install a new one. I'd rather have the piece of mind knowing its one less thing to worry about.

Fluidamper would be my first choice, but it may not be in everybody's budget to afford one.

My second choice would be OEM.
 
#30 ·
Ambico said:
Well, might as well update my thread. They have been on since about 9-17-07 and no symptoms of any damage or odd things happening. It's been about 3000+ miles.
Click to expand...

Thats about 3000+ miles too may......................... :wall:
 
#31 ·
Hmm.. I must be doing something really wrong then. My Unorthodox crank pulley has been on the car since 1997 and 137,000+ miles ago. :dunno:

I know that I'll never hear the end of this, but unless you have a fully built race motor or something along those lines, you will be perfectly fine running an aftermarket lightened pulley if that is what is already on the car.
 
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#32 ·
Yeah I actually only searched and found this because I was curious if anyone had used the Ebay ones... hmmm

I ran with an Unorthodox Pulley on my TT for yhears and never had a problem as a result.

I understand the arguments by those opposed to removing the dampener but it should be noted that it's rarely reported of an engine failure 'as a result' of removing the balancer.

60 years ago when engine tolerances where much broader than they are today removing a harmonic balancer would be like beating the crank with a hammer before installing it! hahaha
Today the tolerances (especially on smaller engine cars) are so tight that the effects of removing Harmonic balancer are minimal if ever even noticed.

I'd be willing to bet that using solid or High Density motor mounts is more harmful to the car by a LONG shot.
 
#33 ·
there was one on the 96 talon i just bought. It looked like an ebay special. The thing totally ripped apart the timing belt cover. I am not sure if the install was wrong, but i would steer away if i were you.
 
#34 · (Edited)
godchsr said:
Yeah I actually only searched and found this because I was curious if anyone had used the Ebay ones... hmmm

I ran with an Unorthodox Pulley on my TT for yhears and never had a problem as a result.

I understand the arguments by those opposed to removing the dampener but it should be noted that it's rarely reported of an engine failure 'as a result' of removing the balancer.

60 years ago when engine tolerances where much broader than they are today removing a harmonic balancer would be like beating the crank with a hammer before installing it! hahaha
Today the tolerances (especially on smaller engine cars) are so tight that the effects of removing Harmonic balancer are minimal if ever even noticed.

I'd be willing to bet that using solid or High Density motor mounts is more harmful to the car by a LONG shot.
Click to expand...

I'd be willing to bet, that your making all this up off the top of your head... :rolleyes: You have it reversed, todays higher tolerance engines are affect much more by something as simple as removing a harmonic balancer, than say an oldschool 350. Do you guys understand what that pulley does? It serves a greater purpose than just something to attach a couple fanbelts too.

http://www.dsmtuners.com/forums/1513989-post386.html
http://www.dsmtuners.com/forums/cylinder-head-short-block/268533-broken-crankshaft.html

Torsional vibration: Every time a cylinder fires, the connecting rod hammers the crankshaft, making it twist as well as spin. After every twist, there's a rebound as the crank unwinds. This twist/rebound cycle is known as torsional vibration and if not controlled, it will result in rapid bearing and crank journal wear and can lead to a broken crankshaft. ( Source: Fluidampr's tech pages. )

Torsional vibration will destroy a crankshaft and/or bearings if left un-dampened.

Personally, I would rather not put my engine build at risk so I can save a few bucks on a blinged pulley.
 
#36 ·
taylor hindman said:
So why do they even make underdrive pulleys if your not supposed to use them?
Click to expand...
Why do people sell crack if your not suppose to smoke it??

People will sell anything that people will buy. They have been making underdrive pulleys for years and on an engine that uses a regular pulley they are fine and work great. I used to run one on an old beelte of mine, it was fantastic. However, these engines are different. Sure people have ran them and don't have any problems, but there are enough pictures of shot bearings and broken crankshafts on any dsm forum to steer me away...
 
#38 ·
Bah... just put any old pulley on joor chebbie an it'll be fine...
Torturing vibrators? Your enjun prolly doesn't have any dildo's in it so it wont be a problem.

But seriously. There is a genuine need for a harmonic balancer pulley on a 4G63. The fluidampr IMO is the right choice. Its not lighter, or less expensive. Or even under driven. It IS however the most capable of snuffing out torsional vibrations in the crankshaft.

Its a turbo car. Want 15hp? Turn up the boost another lb.
 
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#39 ·
I think experience speaks louder than theory... I have never read any stories of people using a lightweight crank pulley with catastrophic results. The only reviews I have read are of people 2 or 3 years later with tens of thousands of miles and no major problems.

I haven't bought one because I don't think the effort is worth the gain (on this motor) but if it was free and someone did the work for me, sure... I'll take it.
 
#40 ·
punisher said:
I'd be willing to bet, that your making all this up off the top of your head... :rolleyes: You have it reversed, todays higher tolerance engines are affect much more by something as simple as removing a harmonic balancer, than say an oldschool 350. Do you guys understand what that pulley does? It serves a greater purpose than just something to attach a couple fanbelts too.

http://www.dsmtuners.com/forums/1513989-post386.html
http://www.dsmtuners.com/forums/cylinder-head-short-block/268533-broken-crankshaft.html

Torsional vibration: Every time a cylinder fires, the connecting rod hammers the crankshaft, making it twist as well as spin. After every twist, there's a rebound as the crank unwinds. This twist/rebound cycle is known as torsional vibration and if not controlled, it will result in rapid bearing and crank journal wear and can lead to a broken crankshaft. ( Source: Fluidampr's tech pages. )

Torsional vibration will destroy a crankshaft and/or bearings if left un-dampened.

Personally, I would rather not put my engine build at risk so I can save a few bucks on a blinged pulley.
Click to expand...

oh yes, the "I'd be willing to bet game"...
I'd be willing to bet that your last statement is true.
(BTW the pulley isn't 'blinged' it's aluminum, genius.)
 
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