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Underdrive Install - Any Surprises?

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Old Mar 5, 2002 | 11:07 PM
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Default Underdrive Install - Any Surprises?

Just wondering if this a straightforward project or is there anything "trick" about installing this pulley?
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Old Mar 5, 2002 | 11:10 PM
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Default Re: Underdrive Install - Any Surprises? (racetchr)

Only that I didn't see any real gain!
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Old Mar 5, 2002 | 11:22 PM
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Default Re: Underdrive Install - Any Surprises? (C54TIM)

Really?! I was told you could pick up another 10hp with this change. Not doubting you, just surprised. Thanks for the input.
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Old Mar 5, 2002 | 11:25 PM
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Default Re: Underdrive Install - Any Surprises? (racetchr)

The RWHP is usually 7-10 but it's a solid .10 deduction in the 1/4 mile :yesnod:
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Old Mar 6, 2002 | 09:49 AM
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Default Re: Underdrive Install - Any Surprises? (racetchr)

I had mine installed so I dont know it it was tricky or not... I did feel the HP gain though. :yesnod:

vetterdstr :cheers:
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Old Mar 6, 2002 | 10:20 AM
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Default Re: Underdrive Install - Any Surprises? (vetterdstr)

I don't think a pulley will give a noticable power gain that you can feel, but it is good for a few ponies.

Installation of an underdrive pulley is not a real easy task. Lots of things on the front of the motor have to be removed, including the steering rack. Personally I would just wait until I was ready to do a cam and have it installed for free at the same time.



[Modified by MattG, 9:23 AM 3/6/2002]
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Old Mar 6, 2002 | 11:11 AM
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Default Re: Underdrive Install - Any Surprises? (MattG)

Thanks Matt for the input. Have already done the cam, so if it involves pulling the steering rack don't think I will do this myself!
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Old Mar 6, 2002 | 11:13 AM
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Default Re: Underdrive Install - Any Surprises? (racetchr)

Does anyone think that the pulley is a bad idea in terms of ruining motors due to them not being machined true, etc? I have been told that many companies are ceasing to produce the pulleys due to harmonic problems and people tearing up motors with them. Thanks.
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Old Mar 6, 2002 | 11:25 AM
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Default Re: Underdrive Install - Any Surprises? (MattG)

I don't think a pulley will give a noticable power gain that you can feel, but it is good for a few ponies.

Installation of an underdrive pulley is not a real easy task. Lots of things on the front of the motor have to be removed, including the steering rack. Personally I would just wait until I was ready to do a cam and have it installed for free at the same time.
Couldn´t have said it better!!

Michael
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Old Mar 6, 2002 | 01:08 PM
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Default Re: Underdrive Install - Any Surprises? (Austrian Vette)

When you install one and drive the car, you will know you gained more RWHP when you feel it.

vetterdstr :cheers:
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