Underdrive pulley

[emoguitarboy]

All I've seen is posts for the 420A. I recently broke my crankshaft pulley and I have been looking for a solid camshaft pulley or underdrive pulley. I've found a set of the Unorthodox pulleys and was wondering the quality of these or if there is an alternative. I looked for the Buscher UD Pulley but couldn't find it on Buscher's website.

 

[crimsondragon]

If you like broken bearings, go for it. Crank pulleys are designed to cancel out vibration frequencys made by the crank. You're better off using stock or getting a Fluidampr. But they're pricey for a stock engine.

 

[majik2k5]

Stick to the stock pulleys. On a stock motor, you're not making the kind of power to even notice the difference between the stock dampner, or an overpriced aftermarket one. Until you've got some more power, they're really not worth the money compared to the stock one.

 

[19gale2gGST]

And just to add to what they already Do Not Get and Underdrive Pulley. They are cheap for a reason, you car will break again, only worse next time if you put one on your car.

 

[4G63_Attack]

I never did believe those under drive pulleys. Such a waste of time and money. On the other hand Fluidampr, yes

 

[emoguitarboy]

Ok, thanks, that's what I was wanting to know. Is there a solid crankshaft pulley or just the wones with the rubber that separates when it wears out?

 

[wret]

The rubber is there for a reason and OEM replacement is considered by most to be the best option. With a life expectancy of about a hundred thousand miles, I would hardly consider them defective.

You might of missed the tiny thread already in existance on this topic. We keep a link to it cleverly concealed in our FAQ section.
http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/273767-underdrive-pulleys.html

 

[Splitpi]

A little off topic ...

But in regards to weight loss of the rotating assembly, what is the generalized power gain per lb lost? I have heard as much as 1hp = 1lb. Obviously there are limits.....

 

[Defiant]

You're heading into bench racing. The real gains can only be determined on a dyno, and the numbers will be dynamic: you won't see the difference at a given RPM, but in the transition from low to high.
Anything like 1lb = 1hp is probably whispered by a flying monkey peeking out of its hangar. Belonging to a salesperson, of course.

 

[Splitpi]

Ya, I dont' want to head down bench testing route... but I just wanted a guess. Kind of like how everyone says 15% loss in tranny... when really its more of a static number loss than a percentage.

 

[emoguitarboy]

thousand miles, I would hardly consider them defective.
http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/273767-underdrive-pulleys.html

Well I didn't really consider them defective, but I guess that life expectancy is better than our timing belts.

 

[talonalex92]

We can beat this topic all we want. But im still gunna stick with the idea that us small stroke 4 cylinder guys dont need to worry about that nonsense. V8 meatheads can worry about it. Now, im not saying I would ever in my life buy or much less use one but the idea sticks to me. Mitsubishi put it out like that from factory? Well they also put the car(s) out running 8-10 psi of boost and a plastic bov.

 

[Defiant]

Yeh. Check the FAQ.