I was wondering if anyone has bought the alt pully from respeed and if so what kinda luck did you have or not have?

Thanks

 

I just bought mine a few weeks ago. It took a few extra days to ship due to the weather, but Billy let me know of the delay, and shot me a message as soon as he shipped it out to me. You can't beat the pulley for the price, and knowing that it'll line up perfectly as well. Great service from respeed, and great pulley.

 

Bought mine a couple of weeks ago as well...haven't had time or weather to put it on yet.
But I'm confident....if ReSpeed makes it....it'll work just fine.

 

Those are great pulleys. Billy and respeed are doing a real service to the rotary community making them available so inexpensively.

 

Ray, That is a super CLEAN engine bay! The only thing cleaner on mine is the pulley we're discussing.. and that's because its brand new haha!

 

I just ordered mine last night, along with the FC to FB fuse box bracket. I'm happy to see all the positive comments.

 

I have one on both my FB and FC and they seem to work just fine. They haven't been on for that long though.

 

I've had mine for >1 year with no problems. It fit nice, is a quality part and works well. Just make sure both belts are new and don't tighten too much.

RXDad

 

whats the reason for a double pully?

 

After you eliminate the stock air pump, you only have one belt running the water pump/fan. Some say it will slip and squeal against the wp pulley at higher rpm's, and the dual alt pulley just adds another belt, eliminating the slip. Another alternative to the dual pulley is a yoohoo belt, or 3l220 belt, which runs just between the main pulley and water pump, but some say it will put too much stress on both the water pump and the eccentric shaft, plus it's a very tight fit and difficult to put on.

 

ahhh, thanks

 

Looks like I will be buying one soon. Sure beats $50 from aktins. I was thinking that was a little stiff.

 

Mine rubs the front belt raw if its tight, but if its more loose, then they squeal from 4K on. The respeed has less space between the belts than the others. Maybe its designed that way to compensate for something, but I find the belts don't travel the same disance each RPM and that causes the rubbing. I like that its cheap, but you can see in that picture, the fan blades have some of the rubber build up.



Sorry to be the devil advocate, the respeed guys do a great job supporting our addiction.

 

jdm thanks for you comment on my clean engine bay, keeping that bay clean is the one good habit I have. If I may add one VERY IMPORTANT reason for using the double pulley to your list, the main reason I have one is because it just looks so darn cool!

(love that picture of the old iron trestle in your sig by the way, reminds me of when I was a kid in Indiana. ND may be the last state left with any of those old structures left)

In fact many people claim just one belt works fine with the air pump removed and several of the rotor heads around these parts do use just one belt. It just looks kind of wimpy.

The only time I've had belt matching problems was when I ordered two of what were supposed to be exactly the same belt from Autozone. They were in fact the same part number from the same manufacturer, but they were a lousy match - I couldn't use them as a pair.

So instead what I do is sort through my collection of half a dozen belts or so and find two that physically match up. This always works, I haven't had have any slippage or wear problems (except for those new belts) since I switched to the dual alternator pulley four or five years ago.

 

Like I said above....I haven't had a chance to install mine, so I'll take you at your word that it will grind the belts......but I do not see evidence of that in the picture. IMO that fan blade looks clean, and I think what you're seeing is the shadow....at least that's what I see....could be wrong.

 

Rusty, The pic I posted of my pulley is as it sits today, installed and never ran yet. I have had my carb off for awhile, as my car has refused to start this winter. There is quite a bit of belt dust on the fan, and that was from when I removed my alternator the first time to powder coat the original pulley, and when I reinstalled it, I tightened the huge bolt too much, and when I started the car the alternator could not spin at all. After about 15 seconds and lots of burning smell and smoke, I realized what I had done wrong!

As for my pulley, I really thought it looked as though I had more space than others between belts, like the chrystler pulley for $5 dollars that is supposed to work. I don't see my setup causing any trouble though, as long as I continue to buy 2 identical belts.

 

Not that it matters much, but I believe the dual pulleys that respeed is selling are the same manufacture as those supplied on the chrysler mitsubishi cars. Respeed had the good vision to buy up a bunch of these and stock them away so we rotor heads can still find them.

That's my take anyway, if you do a "dual pulley" search you'll find a bunch more on the history of this.

I think the difference in gap you are seeing is really due to different belt widths. The angle of the photos might also have something to do with it. Note the the two very much unmatched belts on my GSL are fairly wide and overlapp that small ~1 mm space between the pulleys:



It looks like you have thinner belts, so the spacer is more visible in your pics:

 

Hmm, then what is this from?

Before:



After:



Residue: I know my engine leaks some oil, what original 12a doesn't, when I washed my thumb off it had small strips and bits of rubber, very thin.

 

Ray, thickness of the belts is probably the only difference between the pulleys like you said.

Rusty, it definitely looks like those things are grinding... but they also look super tight like you said. Maybe you should look for some thicker belts, that you don't have to tighten as much and hopefully they don't squeal..

 

Is it 3/4 inch in by pressing between the alt and e-shaft? or am i doing it wrong?

 

1 inch deflection for every foot of free belt,, so 3/4 is correct

the 10a 550/ engine saver/ yahoo belt is the way to go for drive without slip or squeal ,
, or without forever needing 2 new belts to cure the differential wear that these twins do

the 10a 550 belt gets a 270 degree wrap on the water pump,,, not merely a glance along a 30 degree arc like the other belts

it does not damage the crank [ i pull down and rebuild engines,, you think i would know ]
,, its not hard to install
it doesn't chew up,, or get loose ,, or require any maintenance,,

the twin pulley
- needs two new belts,,,, else you will always have a loose one
-- chews the outside belt as that is always going to be tightest
- chews into the pulley if the pulley is alum ( wanna see the pics ? )
- often takes out the other belt when the outside one eventually throws ,, no real redundancy
( and i tried dual pulleys for many years of DD,, they are crap in comparison to the never touch 10a 550 engine saver belt

the only win a dual pulley has is looks
- that is coming form a guy that has been daily using rotary engines for over 20 years
- and building and tuning many many more

 

Bumpstart- its good to hear that the yahoo belt can be used successfully, especially from someone with experience with rotary and tearing them down. Where do you order/buy your belt from? I will admit one of the biggest reasons I went with the dual pulley is in fact because it looks damn cool, and the gilmer is a little pricey. I have two belts that are new, and i hope my setup works just as well as the others mentioned above.

 

duel pulleys still work,, and do look good
they just need a retention maybe every 1500 km and costs 2 belts when you find one has stretched more than other
pulling these super tight to fix a differential between two belts CAN potentially hurt the crank
it will also step score into the alum pulley and cut into the belt ,, resulting spray on fan or bonnet

for the 10a 550 belt-
i am in aussie so i get mine from the local rotor shops or order form local generic parts store
but i will give you a hint that its also avail in places that service washing machines
\dunlop / hoover 38528-403

 

Weird, I never have these problems with keeping the belts in tune. I just find two belts that match (they don't need to be new, in fact maybe used ones are better since they are pre-stretched) put some tension on (don't need a lot with the two belts) and forget about it.

I don't get rubber on the fan blade and I can't remember the last time I changed or adjusted the belts, must have been at least two years and 50,000 miles ago. And this has been going on for the last 8 years, with various belts and cars.

 

I've had good results with one belt and a clutch fan. The clutch fan was healthy. I've also had dual belts slip and make black rubber dust/shavings go everywhere. The cause was a failing clutch fan. I've also had good results with a yoohoo belt from Napa. It was a full HP automotive belt, not a fractional HP.

But what if you don't use a clutch fan? Then a single belt is perfect. Less power robbing than dual belts. I don't care for the look of duals either. They look kinda aftermarket.