Now, let me get this straight. I'm an *** because I told the guy to read the thread? The entire thread was specifically about what he asked. If he scrolled up he would have found every answer he wanted. As for the post you are referring to about telling you you should have kept your 300zx, it sure seems like it. Anyone who comes on this site and does nothing but rag on american cars, specifically gm, yet owns a gm car, really shouldn't own one of these cars. I didnt understand it and still don't. Why buy it if you don't like it? Doesn't it make sense to own something you can be proud of? The majority of people come here because they love their third gen and want to find out more about it, not to rag on the very cars this site is about. I am proud to own my little piece of american history. Like I said, it seems like you would be better suited with a 300zx.

And you are one to talk. Mr. if it's not spintech you are a stupid ***. Talk about a hipocrit here. There is a reason why you have been banned 3 times already and none of them were by me.

1WickedSS, I do appreciate the info. All I said what what march told me when I contacted them about their product. They told me everything was stock size except the crank and alternator pulley. I also just stated the obvious. Why get an underdrive crank pulley and then go back and overdrive what you just tried to underdrive? Doesn't it seem kind of pointless? Moderators are no different than anyone else on here. All we do is moderate. We aren't some type of third gen *** or anything. My job is simply to make sure everything goes smoothly on my board. Nothing less, nothing more. Try not to be so sensitive please.

lol, funny guy. Sorry man but you seem to be the one to start everything. And never did I say anything to ANYBODY about that. The one and only time I did was the when I first got banned and that was because whoever that was (I forget) was being an *** right back at me.

Can you guys believe how immature we all are? Arguing over damn pulleys!!!! I'm out boys

Ok what ever , I am too sensitive, and your an ***, just so we got that out of the way. and as for whats the point with a three peice set? less weight, they look better, and um lets see, they work better. if it wasent neessary to run a three peice set, then why do they make it? I dont have any cooling or charging prolblems with my 3 peice set, even at idle, hows your one peice set doing?thats what I thought. You dont have to be so rude all the time, why dont you pull out what ever crawled up your *** and died, and treat others like people, not dumb asses. I am supremly confident that you dont know everything, quit acting like it!( diddnt you start this thread?) I rest my case.

How do they work better? Explain that one to me. They are strictly for looks and I agree they do weigh less, but march didn't make them for that reason. They made them because you can polish aluminum to a nice shine so people could put them on their cars and say they got shiny pulleys. I never one said you did have any problems with yours. More power to ya, but the water pump pulley that came with it is stock size and the smaller alternator pulley you have is just overdrivng what you originally set out to underdrive. I do not know everything, nor did I once ever say I did. I have a lot to learn just as most everyone here does. That's why I come here. Sometimes I just use a little common sense when it comes to cars and it doesnt make sense to me to overdrive something when you bought the thing in the first place to underdrive it. That was my point. If you are happy with yours then I am glad. Ofcourse you wouldn't have any cooling problems with yours or charging problems seeing as how the water pump pulley is stock size and you actually overdrove the alternator. What was your point? If yout originally set out to have some nice looking pulleys then that's what you got. Congrats. If you set out to get more power you could have saved the money and just bought the 2 piece set or just the crank pulley and it would have done the same thing. Like I said, try not to be so sensitive. All I was doing was trying to give out a little info and explain why I felt that way. I'm sorry if you took that as an insult. It was not meant to be. If you don't agree with me tell me why, don't sit there and call me names.

What would be the best setup of aftermarket pulleys for my 1989 firebird 305 LO3 V8 Automatic?

Yes I have read this entire thread, but there still wasn't any explanation as to what an overdrive or an underdrive pulley does and what the different combinations of types of pulleys to use. I am a newbie to this, so by reading this thread, I am not going to magically understand what all of this stuff does and helps if no one has written what the pulleys do to help. Yes, there has been lots of talk about: pulleys, underdrive, overdrive, %'s, prices, brand names, hp, voltage, 3 piece, 2 piece, inches, alternators, cranks, rpms, V, an argument, etc. But no one has explained what all of this stuff means, why and how it works.

My simple question was how it helped to put these pulleys on your car vs. just leaving the ones that are on there. I didn't see anyone explain that in the thread, just a bunch of tech talk that a newbie doesn't know what it means, because the newbie doesn't know how the subject matter helps and what it does differently than just using the pulleys that I already have on there. All I know that a pulley does is that it is there to be turned by the belt to operate a device. I don't know why you would or need to use an overdrive or and underdrive pulley. And I don't know why you would want to use these for some places instead of others.

I challenge you this 25THRSS, reply with a quote from a post in this thread that answers my first question in this thread. Here again is my original question:

"What does it help to put these pulleys on the crank or the alternator? What would it help with both on or if you just put one on the crank or just one on the alternator?"

Now for the rules:

The quote that you use must be in a post in this thread. And the post must have been written above my first question. And nothing can be changed or altered.

lol, ok, I'll give it a try.

What does it help? It helps free up hp.

"last months chevy highperformance or one of those mags did the pulleys from march on a dyno and it showed a 17 hp rear wheel improvement. i can't remember how much torque though??? it is a very good mod!"

What would it do to just put both on or just the crank pulley?

"crank pulley gave me no charging problems (same as stock) but the alternator pulley brings the voltage down to about 11-12 but only when in drive and at idle, even if you put the car in park or neutral the voltage goes back up to about 13-14."

Either way, underdriving the accessories, or slowing them down, reduces the speed at which they must turn, effectively reducing the amount of power it takes the engine to turn them. Thus freeing up some power that they rob. Putting on a crank pulley will reduce all of the accessories turning rate. Putting on an overdriven alternator pulley will make the alternator turn back to stock speed, so you wont be underdriving it. The water pump really doesnt matter because it is stock sized. Hope that clears some things up.

Yeah, I think I understand it now. A underdrive pulley would turn less than stock. An overdrive pulley turns more than stock. Would I benefit from using an overdrive pulley on my alternator? I figure that would make the alternator turn more therefore creating more volts. What would you recommend that I do on my 89 firebird 305 V8 LO3. I don't wanna compromise anything. I also figure that running an overdrive pulley on the alternator would wear the alternator out permaturley. Would I be better off leaving things alone? I just drive around town.

id're recommend just the crank pulley or if you would like, the march 3 piece power and am series, but I would definitely not get the set that underdrives the alternator.

sit down long and hard and think about this.
















only a crank pully underdrives ALL the accessories including the alternator. the alternator has a very small loss comparied to the PS pump, and the water pump. the way to do this is to underdrive the crank, then overdrive the alternator to keep you charge at idle up (especialy if you are running stereo stuff). you HP gains will come from less loss in the PS and water pumps.

i think you need to have him wait longer.......................

No need to think about it. You knew what I meant, I just didn't clarify it I guess. The crank pulley underdrives everything 25%, but march also makes a set that further underdrives the alternator even more. Do not get that set is what I meant. It will cause too many charging problems. Still I think it's self defeating to overdrive the alternator, but oh well. If you are really having serious charging problems with just the crank pulley, which I highly doubt you will, simply turn the idle up a couple hunded rpm and your problems will be solved and you still get the full benefit of the underdriven accessories.