I just want to know why everyone insists on going double pulley instead of spending $15.00 on a belt from pineapple that does the same thing. No more tension problems with two belts not being exactly the same length, and it's green!

 

Perhaps because with all the bigger things to worry about when driving an rx7, it eliminates one less thing to leave the car crippled. One belt breaks and you can still drive it normally.

 

Yoohoo belts are not exactly "breakable".

 

I know there's a thread on here where somebody's yoohoo belt broke and raped his OMP lines. plus saying a belt can't be broken is just silly...

btw, I have a dual alt pulley, and my 2 belts are different lengths, but you know what? it was $10, so for the cost of it + another oem belt from napa its worth it to me.

 

well I know their not indestructible, and yes stuff can happen but if you take care of your car and install things properly you eliminate a lot of problems. Ive goten better throttle response, increased amperage at idle and higher, and lower coolant temps. I'm not trying to start a big negative discussion, but just wanted to see if there was a good reason for double pulley as apposed to yoohoo belt.

 

the gains you are getting are from reduced slippage, which the dual pulley solves in a different way.

so, in the end, they are 2 different ways of getting the same thing, and they both cost about the same.

I'd say the dual pulley is better because if one of the belts snaps, there is still another one to keep you moving, and because you can get a replacement belt from any local store if yours does break.

 

The only problem I have is finding an exact match. Even if they are the same number, came in the same shipment, sometimes I have to sit at shucks trying 3 or 4 different combinations of belts to get them both tight. If one isn't tight, there really isn't much of a reason to have the second one.

 

yea I have that same problem.

right now I only have one belt on the car because the other belt is a different length. It doesn't run right now anyway, so it's not a big deal lol

 

I am meaning these gains are over double pulley. I just really like the extra contact on the water pump, and even though you have another belt that didn't break, you have about 2miles before it gets worn through by the water pump. At any rate, I appreciate the feed back to my question, I have just seen soooooo many problems with double pulley stuff because of the driving others and I do (drifting, hiiiiiigh rpm crap), and I was not talking for just daily driving situations and I am sorry I did not specify. thanks

 

I went dual pulley because I read somewhere that having only one belt can cause slippage at higher RPMs. So I saw one in the FS section for $35 and bought it. I have never even heard of a yoohoo belt or whatever, probably because I don't browse the vendors and only buy used ****, lol. I used my old alt. belt and bought another one, both are tight as can be.

 

My objection to the yoohoo belt is the lack of tensioning adjustment, so whatever the length of the belt, that's what you're stuck with.
Since I run an airpump the whole issue is moot, but, were I to convert, I'd definitely look to a flat ribbed belt over either option.

 

I love double pulley *****!!

 

Here's the primary reason for the dual pulley:

Note: If you have removed the air pump, the remaining belt does not wrap very far around the water pump pulley. This lack of belt contact area area can lead to slippage of the water pump at high rpm's/high load conditions. The "high load" can be caused by the fan itself, or by the fan clutch being too stiff and/or frozen. We strongly recommend using at least the dual belt alternator pulley to double the water pump pulley belt contact area. (Mazdatrix.com)

 

The bad part about MazdaTrix's statement is, if your running high rpms anyway. The car will over heat from a non working water pump @ those higher rpms..its kinda silly to claim such things..

The real fix is make a larger water pump pulley, since your @ 3500 plus all day long anyways..I have never seen any real cars..IE: 500 HP plus use those dual pulleys things. We always use traction drive belts from garden tractors..you know the green ones that never break..my .02 cents on this..

 

I believe that Mazdatrix is assuming that you have an underdrive pulley (perhaps one of the ones they sell?)

Interesting question - will the YooHoo belt work with an underdrive pully?

On the track car, I of course run an underdrive pulley and a dual belt setup since the engine rarely goes below 5000 rpm. for 30+ minutes at a time.

And while I am not one who blindly believes everything a vendor says, Mazdatrix does know their stuff when it comes to racing RX-7s.

-b

 

Is the yoohoo belt elastic or what? I don't see how it can have proper tension.

FWIW I use an underdrive main pulley with stock size water and alt pulleys (double sheave alt pulley) and I've never run into heat issues at low speeds/stop and go.

 

now if someone came up with automatic tensioner then the dual belts should always work well right?

After much thought I went with a combination of FD pulleys, tensioner, and 2 rotor cosmo pulleys, and a FC non-ps AC bracket.
So now I have 2 ribbed belts.

 

The older green belts we used had small strip of steel wire in them, they never broke. The newer ones now have Kevlar strip inside and those never break either.

not about this adjustment thing..you guys got me lost, can't you guys just pull the alternator up tighter to get rid of any slack?

just get a lenght of string tape it on one pulley run the string the same way the belt would run then cut it, when you get back to where you started . Take the string and thats the belt size you need. make sure you move your alt up couple of inches to allow for adjustment later on.


get a belt that doesn't quite bottom out on the alt or water pulley valley, that way after 500 miles it will set a little deeper in the grove and thus more traction..

 

this is exactly what I thought the yoohoo belt looked like. I saw it and thought it looks like a tractor belt I could get from work. also for you dual belt guys you can get matched set belts. there are a lot of guys that need then for PTO and stuff like that, their kind of a PIA to get though, we had a guy that needed them and I believe we actually had the call dayco to get some sent to us, but you can get them, some people will know more about them than others.

 

The Yoohoo belt is a pain to remove and install. The double belts are not.

 

oh waaaah. It takes about 5 minutes total to install yoohoo belt. And yes there are like the tractor belts. They are undersized and you do need a med-sized prybar or large screw driver to put them on, but it's not that hard at all.

 

The YooHoo belt is a GATES green belt. I dont have the P/N in front of me, but While running my car on the track, the yoohoo gave me better temp control then the dual pulleys.

If your alt belt breaks, you can get somewhere within roughly 20 mins off batt power. You blow the water pump belt, your dead in the water. The Gates belts are awesome as far as not stretching, breaking, or glazing.

IMHO, the Yoohoo is the way to go. You will NEVER find 2 belts that are the exact same size when running the dual pulley setup. You dont get enuf contact with the water pump either.

 

i noticed a increase in voltage when I went from single to double (with the same alt)

 

What are you?
Some vendor bitch who is trying to get around the advertising rules on here?

Reason #1, I had my double pulley BEFORE Pineapple Racing offered their yahoo belt.
Racing Beat has been making these things for a long time now.

Reason #2, I *KNOW* I can find an FC OEM alternator / water pump belt *LOCALLY* if I need to replace it.
That would be fucked if I needed to WAIT for a stupid belt to come in the mail if I needed to replace it in an emergency???

Reason #3, I've never bought anything from Pineapple Racing.
Well, you can call this a weaksauce reason, but it's a reason for me nonetheless.

Reason #4, I'm planning to go electric water pump, which makes no reason to need this belt anymore.

You fail.


-Ted

 

ummm, I didn't mean to get you all fired up