Double Alternator Pulley > *

It's cheap, it's effective. You can go to nearly ANY auto parts store and grab two new alternator belts. (I haven't found a shop that didn't stock them here.) It's simple, fast, and it's not a $300 set of pulleys and funky *** belts just to drive your god damned alternator and water pump, nor is it a special belt that you have to force onto your pulley with a pry bar. Common guys. Not to mention, the double pulley doesn't introduce un-needed pressure on your water pump, and you can adjust it.

This has all been said countless times before.

If you want to be cheap, grab the yoohoo belt.

I prefer to do things right though.

 

I dunno, maybe becuase I hate green Or maybe because I like belts that can be adjusted, maybe becuase I don't think that crowbars belong being used under the hoods of cars, maybe I like to do things right as opposed to half-assed. Just a few reasons

See above, there are plenty of reasons the yoohoo is a bad idea

There is no tension adjustment and when you pry the thing on you're either going to damage some bearings, or stretch the belt so it doesn't make proper contact.

No it's not and you're right, there is no pysical way for it to ave proper tension

No, the problem lies within small descrepancies in the belt sizes

I LOVE you're setup. If I had kept my AC this is exactely what I would've done. Very well done, well though out solution to a tiresome problem. I salute you and your efforts

And do you have proof of this or did you post that standing up so that it could fall unabated from your ***? I've made it 1.5 hours on a WEAK battery before. Care to explain or are you just an idiot making things up?

It would only cause failure while putting it on. After it's on it's probably WAY looser than it should be

Take note of an RX7 owner who doesn't cut corners

You, me and Rob XX 7 are oddities apparently

 

IMHO, the "proper" way to do it is with an alternator relocation to the side of the engine. Not really possible for those with power steering and/or air conditioning.

 

I'm actually considering that option. I need a bigass alternator for the E-fan/electrical system I have planned out. (Complete in-dash touchscreen to manage my future Haltech). Routing the Alt to the AC location, and hiding it with intercooler piping would look badass.

 

I don't think you need as big an *** alternator as you think. Check out Jackhilds 130Amp Alternator sweetness thread for some good tips on properly choosing and driving an alternator. I think with some actual testing you'll find that you won't need nearly as big of an alt as you think you will. At least that's been my experience

 

I ordered a yoohoo belt from pineapple and it was way too small. So I went to napa and got the same style gates belt just a size bigger and it fit perfect. It went on easy and my coolant pump doesn't slip any more.

The yoohoo belt has so much contact it doesn't need to be tight. The principle is the same with the duel belt verses the yoohoo belt idea. Get more belt contact on the water pump pulley so it doesn't slip. The yoohoo belt better achieves this by wrapping around the pulley instead of one inch on one side.

And on the comment about pump bearing wear. You can't wear a bearing if the bearing is not moving. You can damage a bearing when it is not moving though. The yoohoo belt will acually help save your water pump bearing by helping to center the load on the bearing.

 

They're talking about over-tension on the water pump pulley causing premature wear and possibly failure during operation.

 

How do you know it doesn't slip anymore? Do you sit there and count the revolutions @ WOT under load? That's a pretty boastful claim.

 

I'll check into it. I wasn't thinking more than 120amp though.. Finding a nice FD spec alternator would make me comfortable enough. That and a optima yellow top.

It's not like I'll be running a huge audio system. I plan on keeping about 4 small speakers and a single small sub somewhere, with a mild amp. My concern was the computer (running in sleep mode when the car's off) and a bright backlit touch screen in the center console.

 

I doubt the touchscreen will draw that many amps. My AIM dash pulls like 3A or something like that. The 4 LS2 coils though are good for about 20A, and the Motec asks for a 20A fuse as well. But, you're losing the factory comp which in all honesty is about the same draw wise.

Check out Jack's thread. Alot of good info about actually testing how many amps your car will need

 

There's no way to tell that it doesn't slip. Honestly, there's no way to tell that the double pulley doesn't slip either, but at least we have the ability to adjust it.

 

Can i run a Double pully for the alt on a stock na with the airpump? I plan on removing the stock radiator and clutch fan and putting in a koyo and e-fan, should I upgrade to a FD alternator?

 

If you're keeping the airpump you should just leave this thread as your belt contact around the waterpump pulley (which is what this thread is about) is more than adequate.

 

Thank you mister.

 

TitaniumTT_ thanks for the compliments, it was a combined effort and alot of "what if we try this or that" to get it all working.

I have checked out some of your fabrication threads and you definitly dont cut corners and you also tend to overthink things a bit too- its a sickness for some of us!

 

Yes, yes it certainly is. At first I was going to say, "Shame it's not contagious," but then whats to seperate us from the drones?

Again, well done.

 

No I don't count the rpm of the pulley. With the yoohoo belt all the "symptoms" of belt slip are gone. Think of a yoohoo belt as wider tires. the more tire in contact to the ground the more traction you have. It is the same thing with a duel alt pulley except the yoohoo has more contact with only slightly less tension. don't for get the factory alternator belt is still in contact with the coolant pump and it's tension is adjustable.

 

Don't you think that's slightly more accurate than what you said originally? Dee dee dee

 

The one thing i think is funny from pineapples site is how they talk about the fact that if the alt belt broke you could still turn the water pump which could be important to get yourself to the next exit or rest area and then right under that it says this product intended for off road use only....

 

for the same reason you're not allowed to call a water filtered tobacco pipe a Bong in certain stores.

 

it says off road use only because you have to remove the air pump to run a yoohoo. thus making the car "off road only" by removing an emission device.