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post #1 of (permalink) Old 10-07-2003, 04:09 PM Thread Starter
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Underdrive Pulley ??

I understand that they are no longer available, but I was gifted with one (THANKS Pug!!!!) and did a search, coming up with more questions that were answered....... [img]images/graemlins/confused.gif[/img]

Correct me if I'm wrong, but an underdrive pulley will increase rpm's of the alt. water pump and p/s...??

If so I would think my P/s pump would work harder and it would improve low speed steering but wouldn't the alt be screaming for mercy? (GM alt)..... [img]images/graemlins/confused.gif[/img]

Or.... Have I got it all backwards?..... [img]images/graemlins/confused.gif[/img]
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post #2 of (permalink) Old 10-07-2003, 04:17 PM
 
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Re: Underdrive Pulley ??

Think you have it backwards......

The smaller pulley will turn all your stuff at a slower speed.
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post #3 of (permalink) Old 10-07-2003, 04:36 PM Thread Starter
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Re: Underdrive Pulley ??

Ahhhh!! I see....

Now, has anyone had any charging or cooling issues?

How much of a difference in belt sizes?
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post #4 of (permalink) Old 10-07-2003, 06:11 PM
 
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Re: Underdrive Pulley ??

Being on the East Coast you may not have a clooling issue, esp. during winter. Out here in the western deserts underdrive pulleys cause nothing but overheating problems even with the 180* stat. If you want to know all the pros and cons give Brent at Tough Trail a call.
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post #5 of (permalink) Old 10-08-2003, 12:46 PM
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Re: Underdrive Pulley ??

The underdrive pulley is lighter and spins the accessories slower - Thus, in theory, since less engine power is used to run the accessories the motor will make more horsepower and torque. Although these numbers are probably minimal on a zuk motor - any addition would be welcome (IMHO anyway).

[img]images/graemlins/40BEER.gif[/img]
post #6 of (permalink) Old 10-08-2003, 03:30 PM Thread Starter
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Re: Underdrive Pulley ??

Pug, being that the p/s pulley is smaller, that would spin slower as well. Wouldn't that make it more difficult to turn the tires at idle?
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post #7 of (permalink) Old 10-09-2003, 12:42 AM
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Re: Underdrive Pulley ??

crow im the longest runing person on the undrive pulley 4 the zuks still have the first R&D on my zuk with power steering you will not b able to tell the diff in the steering .
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post #8 of (permalink) Old 10-09-2003, 04:24 PM Thread Starter
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Re: Underdrive Pulley ??

Can you give me some insite as to the belts you used?
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post #9 of (permalink) Old 10-10-2003, 03:13 PM
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Re: Underdrive Pulley ??

i used the fatory belt could have went 1 size smaller seeing how it was right at the end of the adj on the bracket
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