i see there is a discount for one on go mini go but i was wondering about the other brands are you just paying for the name or are there better ones?

thanks

 

I think that pulley could use another screw or three. Three screws to hold on a pulley just doesn't seem enough to me. Mine has six but four is just as good.

Use the search feature to learn more about pulleys.

 

Hmmm... I would have to disagree. If the bolts provide an equal amount of hold around the circumference of the hub, your fine. Make sure to use locktite or lock washers like ever other pulley.

Also make sure your choice in pulley is made of one consistant material. Wether it be stainless, mild, or aluminum, dont mix and match the bits. I do recall having to cut a pulley of the s/c shaft(hub was steel, outer pulley was aluminum) after it started to walk and throw belts.

I am partial to the WMS pulley if you want an opinion.

-Brian

 

Can't go wrong with M7 or Alta either... All good quality

 

With only 3 screws, if one comes loose that pulley is going to come off. You are putting a lot of faith in just 3 screws.

I'm not surprise by your pulley of choice.

 

You care to provide the proof on this.

How many screws in the stock pulley, NONE. It is a press fit and this what the screws create in the two piece unit.

This is totally false. The hub is locked into the the pulley. If installed correctly and torque seal applied to the screws will never be an issue. This pulley is as good or better as those sold by others. Cravenspeed products are some of the best on the market. We have installed over 20 with no issues.

This is directly from CravenSpeed -
The mounting screws are more than adequate to the task of spinning the supercharger. Since the design is such that the screws are used to tighten the collet onto the shaft, the assembly will hold about 120+ ft.lbs. of torque. This is well above the required torque.

 

Oh my. I guess I offended a vendor. I'm so sorry.

Perhaps I should have put a disclaimer at the end of my statement.

How's this:

These ramblings are of my opinion and nothing more. Please don't be offended if they are different from yours.

 

You did not offend me, I just believe that too many people post things that people take as fact that are not. Items are designed and tested if you do not like the design just because of the design, then questions about it would be better than stating something will happen. I stand behind and support all the products I sell.

 

I'm pretty sure that my comments sounded like they were "my" opinion and no one would take them to be fact.

Thanks for chiming in to support your product.

 

If one backs out, you didn't install it correctly. Even if one did, the collar is locked in place by the other two screws. It won't come of unless you press it off.

Craven speed makes the alta products... Look at the new Alta pulleys. 3 bolt. I am partial the WMS pulleys because I installed tons of them, and having a hole in the center really does help the installer make sure the pulley is lined up with the shaft. Its preeeetty too.

-Brian

 

what about the crank pully? is it neccessary to have that increased to 2% one? if running a 15% supercharger pully? and i also heard something about a gatorbelt in another post as well as a device that will save something if the belt shreads. anyone know about these and how much they'd be?

thanks

 

The 2% crank pulley is a good addition to the 15% S/C pulley. Tons of street an race cars out there running them with no problems. However, I strongly recommend using the factory continental belt if you can. If you have to go smaller, use the factory JCW belt. I have heard of and seen to many belts break for no reason when using aftermarket belts. Gatorbacks will break prematurly! Ask Rich Peterson as I helped him replace his after only running it for two races. A continental will last upwards of 50k miles on a pullied car.

-Brian

 

so if i get a 15% pully and a 2% crank pully would i have to upgrade the injectors?

 

Whether or not you needed larger injectors could be determined with an A/F reading while the car is on a dyno; but it’s highly unlikely you would need larger injectors with that combination of pulleys.

If you decide to add larger injectors for any reason, you will need a program to manage them.

An aftermarket stop limiter for the tensioner is good for peace of mind, but not a necessity. Inspect the health of the belt drive system regularly, change the belt when it stretches too much, and there shouldn’t be any surprises. In my multi-mile experience, the Gatorback is no more failure prone than any other belt when subjected to extreme usage; just more noisy.

FWIW, I put a 3% crank pulley on a 15% SC pulley equipped MCS and the stock Conti belt fit just fine.

 

scandune,

A 2% Crank pulley with a 15% SC pulley is like running a 17% SC pulley. My only caution would be to change your plugs to the cooler ones. Since you live in San Antonio, you might experience too high of engine temps with this setup and stock plugs. Especially if you drive the car hard for a long period of time or track it. Of course, your body may experience too high of temps too living there! I am experiencing old flashbacks of living there for a year as a kid on the Air Force base. WOW! was it ever hot.

BTW - I changed my plugs when I got my 15% pulley way too many miles ago. All is still well at 73k miles.

 

Since we're asking pulley Q's and there seems to be a few experts here, would it be OK to run a 19%/correct belt with no other mods? I thought I remembered reading that 19% required software upgrades and possibly injectors.

 

Yes it would be OK; you live at higher altitude and have a unique operating environment so it would be a good idea to get A/F measurements to verify. The larger injectors & program are about optimization and headroom; no damage if you don’t include them. I have a 19% and operated for a while without them; NAM member greatgro went more than a year without the extras. The GIAC/Helix flash for the 19% and 380cc injectors has made a difference on many levels so it’s worthwhile. I’m well over 20,000 miles on the 19% and had 40,000 on the 15%.

 

I'm guessing this is the stock blower - Will a 19% pulley/combination spin it too fast? Wear it out faster?

 

Not sure. There was some talk on Whiteroof a while back that said that the SC was rated for 150k miles. What we don't know is under what conditions. But if you assume it is rotational based, then yes, it should wear out quicker. However, the big caveat, I think, would be how you drive your car. I mean, a daily driver that is mainly in traffic versus a racer surely would have an effect on the longivity of the SC on both cars.

short answer - i dunno.....

 

I deal with this issue quite a bit and from my experience you are not alone in your mathematical thinking. The answer is that it is a ratio of the crank to supercharger. And if you do not understand the mathematics just simply test the boost using differing combinations. You will then soon grasp the math.

 

Haha thanks for the shot.

 

Just a quick note about our S/C Pulley V 2.0 vs. the original ALTA S/C Pulley (and all of the rip-offs similar to it.)

I hope everyone will visit our new website www.altaminiperformance.com in the next few hours. It will have detail photos etc. of the new pulley as well as a plethora of other items too. But, our new pulley doesn't secure itself in the same press/pinch type method as before. We now incorporate a stainless steel center hub that is pinched to the shaft using two retaining bolts. It also has a centering site hole to allow the installer to verify it is seated prior to installing the outer hub. The outer hub is made from 6061T6 and is secured to the inner hub via three screws.

If this was the earlier type design the use of four or more screws would be required to hold the press/pinch style together. WE completely agree that the use of a pulley with only three screws of the earlier style could create a problem( see CS style advertised above). It is for this reason that our new V 2.0 design center hub can accomodate up to .020" of machining that has occured to the OEM S/C shaft by an ill fitting, improperly tightened pulley. If your previous pulley wobbled, or slipped to any degree it will remove material from the S/C shaft causing the overall diameter to decrease. Our newest design will work on those cars without having to spend a ton of money to install either a new S/C or S/C shaft.

I will be brief here but check out our new website later today for more complete information. (Also, we do not have any of our products made by any other vendors on NAM, etc. We pride ourselves on being a truly independent company and not a re-brand, copycat, company. For any information on when and how parts have been made, PLEASE let me or my staff know directly.)

As always thank you to NAM for the opportunity to discuss these and other products. It is appreciated!

 

These top two quotes seem kind of funny together...

And what testing have you done to show 3 bolts are inadiquate. From my experiance, you need to push the hub off using two bolts once the hub has been locked to the pulley.

I guess you guys have stepped away from Craven then...

-Brian

 

Brian,

Thanks for the follow up. Four tangs on the center = four bolts on the outer hub. Going to three places un-even pressure and can result in wobbling, loose fit etc. Take my opinion or leave it. No big deal. We've moved on anyway, check out our new pulley!

We have NEVER employed the aforementioned company. Any rumors to the contrary are untrue and may be considered liabelous. Finally, to help quell those rumors ALTA Performance has been in business since 1996, and producing parts for the MINI (as well as other cars) since 2001. Nuf said!

If we can help in ANY way shape or form let us know! Also, the new site is up so check it out!

Thanks NAM!

 

Just went to your new website, it loads at a snails pace for me and I have cable modem. I will check it in the morning again to make sure it's not me, but right now everything else is loading ok.