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06CTS-V BOLT-ON,06JEEP TJ BUILT, 91 350SDL turbo(daily)
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Discussion Starter #1
what gains can i expect from an underdrive pully
 

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04 CTS-V with a little hp persuasion device
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I have an overdrive pulley but that doesn't really help you much.

Free bump for ya.
 

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'05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo
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Some people who have them don't think its worth the effort, unless your already in there doing a cam.
 

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06CTS-V BOLT-ON,06JEEP TJ BUILT, 91 350SDL turbo(daily)
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967 Posts
Discussion Starter #4
cause my friend has a g8 gt and people on there forum say it does a good amount for what it is for the g8 and thats a 6.0 and im a 6.0 so i wanted to know it it would be worth it if im already gunna do a throttle body and manifold port job... im going to cartek in garwood and im gunna get a tune there any1 konw anything about cartek in garwood nj
 

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'05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo
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I think you gain maybe 10hp. Its a lot of work though. People do it when they get a cam, since the front of the car is already apart.
A few people had alternator problems, but its not confirmed to be because of the pulley.
Well, thats all I know.

Tony
 

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I think onebadcad has a reduced underdrive pulley right??

Cowan
 

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'05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo
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'05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo
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Actually, you might be thinking about his rear pulleys on the Maggie. Those are underdriven, for more boost.
I think the OP is talking about the crank pulley.
 

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yes, thats what I was talking about..
 
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