Will these fit?

Just a word of caution the seller jpb10140 has a feedback score of (0) who in this day and age on the internet has not at least purchaced something from e-bay. I would send the seller an e-mail just to make sure that he has the item and try to find out why he is getting rid of them so cheeply, oh and only send payment through pay-pal.
 
Do you really get the gains he's talking about? Gas mileage?

8 to 10 hp is really nothing but it adds up with other mods?

But what are the noticeable gains?
 
$199.99 at Steeda

That kit is $199.99 at Steeda. He looks to have a fairly high reserve set, and someone has an auto bidder set to a fairly high number. Good luck on bidding on it.
 
Might be a stupid question, but does something like this reduce the output of the alternator? I'm planning a somewhat big stereo system setup.
 
NO and Yes

Underdrive pully's do not lower the output of the alternator, but it does slow the alternator. That means that the alternator will not start to "Make Juice" until you give it a few RPM's. You may see your light go dim as a Pully'd car tends to run off of the battery at idle because the low RPM rate will keep the alternator out of the charge range. With a big system installed, that problem can definately be magnified. If you are going to run pully's, better to have a custom alternator built, and let the builder know what size pully's you will be running so that he can build the alternator with that in mind. that way the alternator can keep the batteries at peak at a lower RPM.
 
An alternator with a stock pulley setup produces 90% of its maximum output at idle. So I imagine that with an underdrive setup it would produce the 90% at 1500 or a little more.
 
Would buying one of geno's alternators fix this problem? or a cap? or both?
 
i really do not understand why someone would not install a cap when doing a system, that should not even be an option!
 
I wouldnt recommend pullies if you are getting an aftermarket stereo. I just converted my air suspension so I doubt my car needs all the amperage it was previously getting.
 
but sometimes i see rustangs with systems and also are highly modded in performance. yet they go to the track and run!
 

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