I have made my choice on getting the 19% pulley, all I need now is which one should I get. I have always liked all of the Alta products, put alot of people say great things about Helix13. I also want to know which is less likely to slip. If there is already a topic on this let me know, but if not any help will be much appreciated.

Thanks,

 

Well i don't know much about the pulleys that you are looking at, but i have the promini pulley and its great! Easy to put on and it looks just beautiful. If you have any questions just let me know... :smile: My goal: 220hp without a smaller pulley (ohh i couldn't resist, i got a promini 19% pulley!)

 

alta:

Promini:

 

Whatever company you choose - make sure to get a taper-bore style. Better to have no-risk than possible-risk. Be sure to use a smaller belt, and of course, threadlock on the bolts.

 

Helix.


--
Cheese

 

>>Well i don't know much about the pulleys that you are looking at, but i have the promini pulley and its great! Easy to put on and it looks just beautiful. If you have any questions just let me know... :smile: My goal: 220hp without a smaller pulley (ohh i couldn't resist, i got a promini 19% pulley!)

I didn't know about the spring thing in orlando. Send me a pm with info, also do you ever go to the tower shoppes?

I bet I'll have some questions later.

Thanks,

 

>>Whatever company you choose - make sure to get a taper-bore style. Better to have no-risk than possible-risk. Be sure to use a smaller belt, and of course, threadlock on the bolts.

This may sound stupid, but I thought most of them were taper-bore style. But just be sure are the Helix, Alta, and ProMini taper-bore style?

Thanks,

_________________
ROBERT
MIAMI, FL
"GIVE ME A CHANCE TO SHINE AND I'LL BLIND THE WORLD"

 

ALTA was the 1st to bring the taper-bore to market. After that, everyone else followed suit - even the die-hard interference-fit guys. There's a reason everyone has adapted the taper-bore design; it's better.

Hope that helps,
Ryan

--->Cheese, gotta pic of the Helix taper-bore?

 

The new pulleys we have are taper bore....i wouldn't say it is better..or worse...but easier to put on which saves either you time or your mechanic.

 

P&D is no longer producing interference fit pulleys. We are still supplying optional size aluminum pulleys to fit an already installed P&D interference hub, should you want other diameters.

The taper fit has proven to be reliable and due to a less demanding install is the style of choice for most. P&D is now manufacturing that style in 15, 17 and 19% available through Promini and Helix.

 

That solves that question.


From the looks of the pics I have seen of the Helix, Alta, and Promini pulleys they all look like they all slip right on. I could be wrong, do the hubs have to be heated?
In order to be installed.

 

>>The new pulleys we have are taper bore....i wouldn't say it is better..or worse...but easier to put on which saves either you time or your mechanic.


Taper bore and easier, thats what I'm talking about. It's all about quality and ease.

Thanks,

 

I'd go with Helix because they have BOTH kinds and cost considerably less than everyone else out there. And there product (produced by jlm) is absolutely top quality.

 

is jlm saying that Promini and Helix sell the same pulleys because i was not aware of that and it looks like i'll be dealing with Helix in the future, especially once their carbon fiber intake is done and the GIAC software is finnally completed.

 

>>is jlm saying that Promini and Helix sell the same pulleys because i was not aware of that and it looks like i'll be dealing with Helix in the future, especially once their carbon fiber intake is done and the GIAC software is finnally completed.


What I think he means is that Helix13 has every different size pulley and they also have them in slip-on form or solid aluminum form (you have to heat up to install). He does make a good point on the fact that the Helix13 pulley is considerably cheaper that the Alta and the ProMini pulley.


So, if the Helix13, ProMini, and Alta pulleys are pretty much the same. Wouldn't it make perfect sense to just go with the one that is cheaper? If I'm wrong, let me know. I'm pretty sure some one will beat me with a stick very soon, if I'm wrong.

 

Helix.

 

Promini 19% one is good !! Nice quality...

I used on my 2003 MCS already...the machine run awesome !!

 

I love all the info kids. Thanks. I am researching a pulley upgrade right now. What do I need to know. Its all kinda greek to me.

I am looking at a 17% reductions. With the pulley reduction do I need to remap the ECU? I know this has been posted before. With 17% reduction will I need a new belt? I am thinking about the snap on from helix. What else do I need to know? A friend of mine will install it for me. He asked something about the PSI for the supercharger?!?! What is this about? obviously I am stuggling with this topic. HELP!?!?!?!?!

Thank you all.

 

Not to be the bearer of bad news, but i really wouldnt go for a 19% pulley. Heres why:

This past weekend i got my pulley done by Randy webb (www.webbmotorsports.com) and it was a blast! Heres the problem he had with it. Being that its cold, he tested the 19% on his mcs. Alone, there wasnt much of a difference from a 15% and the heat curve was horrible (in the cold). He said it simply just went straight up from the power the pulley was making. Once the temp got to warm, the system dumps fuel into the engine therefore making the 15% more powerfull.

Overall, you will also hurt your engine life and the supercharger life, as Randy even had a SC fail because of the 19%

In your best intrest, i would not get it.

Hope you have an idea,
Scott

 

Thanks for the info but if you had followed this thread you would know that Randy's opinion on the 19% is not only already in this thread but also in a number of other current ones. I will say that I had the 15% and now I have the 19%. The difference is huge! At least 50% more power (backed up by another 7-8lbs of torque on dynos) than the 15%. Actually the butt-dyno says there's even a greater difference. The other thing is the torque comes on so early that it totally transforms the MCS into something else. Just like the 15% makes a huge difference and lets you drive in a gear higher and still have good power, the 19% lets you drive in even another gear higher - you have more power with the 19% at 2000RPMS than with the stock pulley at redline! It becomes so driveable that it makes the S move into a whole other class of car.

As far as testing goes, Randy isn't the only knowledgeable person who has done testing on the 19%. Helix for one, has probably done the most testing in the country on it and they found that cold (and luke warm) weather temps were practically the same as the 15%. So according to them, the is no bad cold weather "heat curve". Although they haven't done extensive hot weather testing yet, several other well-known vendors have and they've put lots of hot weather miles on their S's with no ill effects or measurements. Add to that an aftermarket ECU which is specifically made for the 19% and there should be no worries at all.

The upside, IMO, is huge. 15% reduction gave a lb of torque per percent. For 4% more reduction you gain twice that - around 2lbs of torque per percent. That's telling me 1- it may be the ideal size for our engine; and 2- You can get 50%+ more power over the 15% yet you're only spinning the supercharger a little bit more (whereas in the 15% versus stock you're spinning the supercharger a lot more). And b/c you get so much more low-end torque with the 19% and very little extra HP at the top end, you will find yourself shifting earlier and running lower RPMs and therefore probably supercharger RPMs than you would with the 15%. And due to that, your engine/supercharger with the 19% might even outlast the average 15% pulley. At least that's how I see it. But the fact is, no one really knows and we won't for another 5 years or so (or in my case with 30k miles a year, probably a lot sooner!)

 

Right on Greatgro!!!!

 

For those worried about 19% pulley upgrades in a hot climate we have several MCS with 19% in Hawaii with daily temps of 82 degrees and higher.

There are no reported problems in any of the upgraded MINIs and in May we will have the chance to get some track time.

If you are still worried give Eric at HELIX13 a call. He's done the datalogging for kie:19% reduction pulley.

 

I have the Helix 19% and it's great. No problems whatsoever. Eric has installed a lot of them. It was well worth the three hour drive to Helix for me.

RaceCarDriver

 

I'm loving all the great information guys, keep it coming. Just so that you guys know I made my own (way cheaper) water to air intercooler, so air temps are not an issue on my car. I also don't mind the little extra fuel, since my baby is going to be bottle fed .

So, I have heard of alot of people with the ProMini pulley and the Helix13. Does anyone have the Alta pulley?

But Helix is winning the overall vote and great price.

Thanks guys,

 

Helix/Promini what's the question, jlm makes them both I believe.
Go Helix, better pricing.