I'm planning on installing a reduction pully soon, was wonder which brand and which % have people found to work the best.
I've already upgraded the Exhaust to a Borla CatBack and a Denan Cold Air Intake.

 

Let me be the first one to say it: use the search function. This has been covered many times.

 

15% is the safeset to use. Brands don't matter that much.

 

we have a winner!

Matt

ps, keep an eye on the marketplace. They pop up there from time to time at a discount.

 

15% great for overall driving up to redline. 17% & 19% require a different belt and possibly larger injectors. Will need new injectors for 17 or 19% if you add the GAIC software. 17 & 19 aren't safe for long periods near redline (so I hear)

Whichever pulley you choose, after it's installed, you'll be wondering why you didn't do it sooner!

 

You could also go with a 16% safely

Did I kinda win?????

 

15% here! Love it and 15% is 15% unless it's ubertainium....

 

im pretty sure they make those out of Unattainium. Only the hightest quality of course!

 

 

Only the BEST....

 

Hey can you use a craftsman pulley removal tool to remove the pulley? As far as the size being to big and what not?

 

Let me be the first to say: don't bother. The search function on this Forum is a POS, and people want the opportunity to be helpful, even if they've answered the same question before.

 

Ditto and Thank You...

 

Yeah, I'm also a bit tired of the "use the search" answer personally.

Anyway, as others have posted 15% is a good number unless you plan on some other mods. It would be a great start point.

That being said, I have installed some Alta V2's and one of the nice features of these pulleys is that the sleeve is the same on both. This means it will make swapping them out a bit easier if you decide to move to the 17%.

 

Thanks!
People's eagerness about answering these types of questions only reinforce their satifaction with the product!!

 

I've got a few mods already that's why I'm wondering which is the best size to install, for where I'm at in my modding stages.

 

I'm running a 17% and couldn't be happier with the power its making. Many Many Many people have 17% and 19% pullys installed with no problems whatsoever. These forums I've found to be full of opinions and its ultimatly going to come down to you.

Before I decided to go with the 17% I called a few of the vendors selling them. They asked what my driving style was like and what future mods I was going to install etc etc and I based my decision from their knowledge, my driving style and my future mods. I don't track my car and wanted a quicker spool up so I went with the 17%

If you don't track your car or plan to autoX here and there a 17% will be just fine for you. Looking at your current mods you'll be fine with whatever diameter pully you choose.


As for telling people to use the search function? Ya.... that thing sucks. If you don't want to answer people and be helpful just don't type anything. Let those of us that don't mind answering a question multiple times to be helpful do it. Seems rude and cold to say

Hey you.... use the search feature

 

Just looking at what you have I would go with a 15%. I am no professional tuner, but from what I have read and the research that I have done the 15% seems to be the most reliable. Add to that, there are other mods that will take you higher and after those you could contemplate 17. The one guy that decided to run a 17 (FlyingSmiley) loves it. In fact, I haven't been able to wipe the grin off of his face. That being said, I went 15% because it is not pushing as hard and the car still has good pull in all gears.

FYI, M7 does make a 16% if you are interested in splitting hairs. I just installed one of those a few weeks ago and the car pulls nicely!

 

I'm really moving towards the M7's pully.
When you installed yours did you also install the M7 2% Crank Pully.
I've read a few threads that say if you change one to change the other.
I also heard of people having trouble with the 2%
I'm looking to do this upgrade as well as the ALTA Top mount Intercooler Version 2.0

 

Keep in mind that whatever pully you choose, if you go with a 2% crank it will reduce your overall pully diameter by 2%. For instance, if you get a M7 16% and a 2% crank your pully diameter will be reduced my a total of 18%. They do make a lightened version of the crank pully with no reduction.

 

I went with a Helix installed 15% just to keep it on the safer side.

BTW, I agree on the search function.

Try using Google but restrict the search to NAM as follows:

site:northamericanmotoring.com "search words"

 

Yea 15% is the way to go safely for sure... You'll feel a big difference right away... also do the plug's with it too and it'll help out.
I have a minimania 3 piece pulley for sale if you want... $100 shipped.
It's extremely easy to install... I paid $400 with install and when I pulled it to go back to stock was so mad when I saw how easy it was. Everyone say's you need a "Special Pulley Remover"... trust me, you don't!!! You just need a brain and some tool's. Haha....
Let me know on the pulley. I even have the reduced belt to go with it. I had it on for about 4 months.

 

Having installed 10 pulleys now I can honestly say that you should spend the 50 or so bucks on a proper puller. If you mess the SC shaft up, you will be digging deeper into your pockets to replace it.

I have not done any crank pulleys yet but what was posted is correct as you will be turning everything faster. That may be a future mod and will be one that I get a bay to do it in.

As you can see, you have all sorts of advice and the choice is really yours.

 

I think after having heard and read all sorts of information about the 15% it is by far the most reliable unit available with no problems at all compared to anything else. There have been instances that the 2% crank did some damage to the engine in the long run as one of the members here experienced. There has yet to be any major problems at all with the 15% alone. Everything else is pushing your luck. Also, to a poster that said the 16% + 2% crank equates to 18% is not completely correct the equasions don't work that way all the time.

jm2c.

 

In the MC2 issue #8, they did a track shoot out of SOME very heavily modded and quick Minis. The one with the fastest time had a 15% pulley, 2nd custom?, 3rd 15%, 4th 15%, 5th 15%, 6th didn't have one (MC), 7th 15%, 8th 15%, 9th Dinan?(I think 15%), 10th 16%, 11th 15%, 12th 16%, 13th NA... I really like my 15% for what it's worth....