[Big Dave]

Ive been looking at these for a while now , wondering if they are worth the money..



http://cgi.ebay.com/ebaymotors/ws/eBayISAP...340085&rd=1



Has anybody ever fitted a set + if so what were your findings..



What exactly do they do.??

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[SpeedRacer64]

[quote name='Big Dave' post='44645' date='Dec 14 2007, 06:15 PM']Ive been looking at these for a while now , wondering if they are worth the money..



http://cgi.ebay.com/ebaymotors/ws/eBayISAP...340085&rd=1



Has anybody ever fitted a set + if so what were your findings..



What exactly do they do.??[/quote]





I have not used these but have on a different set up...and yes it works...much in the same way changing gearing on your ten speed bike to go up a hill...reduces the amount of power required to turn the accessory drives.



Hope this helps....to bad there so expensive

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[SILVY968]

[quote name='Big Dave' post='44645' date='Dec 14 2007, 04:15 PM']Ive been looking at these for a while now , wondering if they are worth the money..



http://cgi.ebay.com/ebaymotors/ws/eBayISAP...340085&rd=1



Has anybody ever fitted a set + if so what were your findings..



What exactly do they do.??[/quote]



I can't speak from personal experience, but I know that flash has a set. Search the form for this item as it relates to alternators not spinning fast enough to output 12VDC at idle.

Brian

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[PorscheDude]

As Silvy said, The main problem would be not getting a good charge to the battery in extended stop and go traffic.

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[flash]

i do indeed have them



downside - not enough voltage for daily street use - i do NOT recommend them for a daily driver - fine for my toy though - very definite deficit spending at idle, even with everything off



upside - less power steering input, resulting in a better and more positive feel for me



also realize that the power increases are really below 2500 rpm - this is because the alternator and such are essentially acting like "pumps" and after that rpm, they have acheived full "pressure"

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[Renalicious]

Just how much power are these engines losing because of the power steering and AC?

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[PorscheDude]

For a street car, none that you would notice.

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[flash]

i've seen charts showing 7hp, including the alternator loss, but all down low, below 2500 rpm

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[Allen1322]

I had a pair on my truck w/ a serpentine belt. So it slowed down the AC, power steering, water pump, and alternator. It made a noticeable (seat of the pants) improvement w/ low end punch. It also came w/ a replacement Alternator pulley so that you don't get the voltage drop.



The problem was that I didn't have an impact wrench when I did the alternator pulley and couldn't get it torqued down as tight as they said to. I figured it would be fine. About a month later my truck made a terrible noise going down the HW. I couldn't figure out what it was until later in the day when the alternator pulley came off. woops! So I ditched the power pulleys and kept it simple and stock.

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[flash]

yeah - not a lot of gain to be had - it's there, and it's noticeable, but comes with complications that are really just not worth it on a street car - i'm leaving them on, but that's because i don't drive the car much - i will not be installing them on either of the other 2 968s (nor the bmw or the denali)

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[banditsc]

You could just get the under drive pully for the power steering, but the gain would probably minimal.

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[Fox944]

Where can i get power pulleys? How much do they weigh vs stock? And how much am i looking at spending?

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[flash]

rs barn



quite a bit less - well over a pound lost as i remember - i would have to go and look up my notes for specifics (if i still even have them)



a couple hundred bucks as i remember - call pete for that

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[Jason Judd]

Is there some way to only use the power steering power pulley, so that my power steering wasn't as assisted as it is now?



I just recently switched from manual steering back to power steering and I would like a bit less assistance from the power steering.



Jason

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[flash]

i would have to look to see if the crank pulley was a 2 piece or not - i'll be down in the shop later today

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