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2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

crank underdrive pulley worth it?

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Old 08-09-2009, 08:41 PM
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crank underdrive pulley worth it?
Title says it all!

Are the underdrive crank pulleys worth it for a 2.4?
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Old 08-09-2009, 08:45 PM
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id like to know the same for a 2.2???
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Old 08-09-2009, 08:48 PM
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nooooooooooooooooooooooooooooooooo
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Old 08-09-2009, 08:50 PM
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Originally Posted by PsshPlzz
nooooooooooooooooooooooooooooooooo
Highly detailed and scientifically proven point!
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Old 08-09-2009, 08:52 PM
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Originally Posted by CordiaDOHC
Highly detailed and scientifically proven point!
please read, ty

http://www.atiracing.com/products/da...mper_dinan.htm
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Old 08-09-2009, 09:09 PM
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Originally Posted by PsshPlzz
Well aware of the pulleys that flat out replace the harmonic balancer. While I have not looked at the cobalts to see if the pulley and balancer are one piece I know that on my fbody the dampener and pulley were different pieces so under driver was easy
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Old 08-09-2009, 09:31 PM
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Originally Posted by PsshPlzz
There are several members on here that have installed a lightweight UDP. Its been brought up but doesn't appear to be an issue.
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Old 08-09-2009, 09:32 PM
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Originally Posted by CordiaDOHC
Well aware of the pulleys that flat out replace the harmonic balancer. While I have not looked at the cobalts to see if the pulley and balancer are one piece I know that on my fbody the dampener and pulley were different pieces so under driver was easy
the cobalts are one piece
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Old 08-09-2009, 09:38 PM
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if you more then likely not gain that much but you will rev freer and get to use what power you have faster.
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Old 08-09-2009, 09:52 PM
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eh its a 2.4 auto it needs all the help it can get
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Old 08-09-2009, 09:57 PM
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boost it, money well spent
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Old 08-09-2009, 10:00 PM
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Originally Posted by PsshPlzz
boost it, money well spent
Its got 20k on it. trying to limit it to mods that are more easily reversed
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Old 10-28-2009, 07:41 PM
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So this will help for the 2.2l but not much? It just lets you use the power at a faster rate? How much hp gain would we be looking at?
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Old 10-28-2009, 08:21 PM
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Originally Posted by souchak2112
So this will help for the 2.2l but not much? It just lets you use the power at a faster rate? How much hp gain would we be looking at?
It will help the car with revving quicker which I believe helps acceleration. As far as a hp gain 1-5 at most.
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Old 10-29-2009, 03:46 AM
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I pretty much ruled this out. That and losing the actual harmonic balancer kind of bothers me.....
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Old 10-29-2009, 04:01 AM
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80k on rksport udp no issues, works great no abnormal vibrates
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