[MiniDSW2005]

Hi:

I am wondering if there is a big different between the 17% and the 15% pulley. People said the 17% will gain more low end torque, does it mean you can start to feel the gain from 1K RPM? How about the 15%? Does it make any different though 1K to 3K RPM?

I am planning to modify the pulley into my MCS, and I really hope the pulley can improve the power band from 1K though 3K RPM... I always feel my MCS 's 1st gear is very slow when take off... (When drive in 1st gear, under 3K RPM feels like the car is not moving at all...)

Thanks

[obehave]

1K ...no.
Over 2500 you'll really fell the difference with either design.

[matfrost]

About 2%

[My Pocket Rocket]

Go with 19%...I have 15% and it's totally better than stock!....but some day I might go 19% I don't know that 19% or twincharge which one will come first!

[obehave]

Quote: Originally Posted by My Pocket Rocket

Go with 19%...I have 15% and it's totally better than stock!....but some day I might go 19% I don't know that 19% or twincharge which one will come first!

Let's see....

$200 or $4000................I wonder what the decision point is on this one??

[jason@promini]

Quote: Originally Posted by obehave

Let's see....

$200 or $4000................I wonder what the decision point is on this one??

We carry the 15, 17 & 19% pulleys for $139 each. Each step up adds 20 hp.

Jason

[MINIAC]

Quote: Originally Posted by jason@promini

We carry the 15, 17 & 19% pulleys for $139 each. Each step up adds 20 hp.

60 hp extra from a 19% pulley

[obehave]

Quote: Originally Posted by MINIAC

60 hp extra from a 19% pulley

Gotta get me some of that

[MiniDSW2005]

Quote: Originally Posted by MINIAC

60 hp extra from a 19% pulley

I guess what he means is we will get 20HP with no matter what kind of pulley. I finally decide to go for the Helix 17% with the belt upgrade... Hope it will be reliable though.

The other think I may concern about is the life of the pulley belt; how many KM or Miles can it handles? Do I need to change the belt once every 3~5 years?

Thanks

[norm03s]

Quote: Originally Posted by MiniDSW2005

I guess what he means is we will get 20HP with no matter what kind of pulley. I finally decide to go for the Helix 17% with the belt upgrade... Hope it will be reliable though.

The other think I may concern about is the life of the pulley belt; how many KM or Miles can it handles? Do I need to change the belt once every 3~5 years?

Thanks

You made a good choice, best manufactured pulley out there IMO. I am running a Goodyear Gator back, no problems. Have been watching the tensioner for belt stretch and can't see any beyond the initial set. Some say 30,000-40,000 miles but I think that all depends on the driver and monitoring the belts condition. Get yourself a belt tensioner tool and you can change belts in 15-30 min., it's not a big deal.

[MiniDSW2005]

Quote: Originally Posted by norm03s

You made a good choice, best manufactured pulley out there IMO. I am running a Goodyear Gator back, no problems. Have been watching the tensioner for belt stretch and can't see any beyond the initial set. Some say 30,000-40,000 miles but I think that all depends on the driver and monitoring the belts condition. Get yourself a belt tensioner tool and you can change belts in 15-30 min., it's not a big deal.

Hi, Thanks for the info. Before I thought when it is time to change the belt, the technician may need to do the same kind of work as the pulley swap...

The reason why I went with the 17% is because, from my research I found people keep saying that I can get more low end power with the 17% (19% actually gives more low end... But don't want to take risk to my new MCS). And I think the low end is very important for daily driving though.

Then other thing I am worry about, it's the ECU tunning... I heard there is not yet any ECU which support 17% or 19% pulleys... Is it true?

And I am still thinking if there are any ways to improve my MCS to take off faster... (The first gear is slow IMO... Always lost to the cars like Civics, BMW 320I, GTI 1.8T.... But after the 2nd gear, it is another story )


Thanks

[MiniDSW2005]

And another thing I forgot to ask is, I heard that after the pulley swap, I will need to change the spark plugs too? I heard that the Denso IK22 is the best combination with any kind of pulleys... But how about the NGK Iridium IX?

Thanks

[norm03s]

Quote: Originally Posted by MiniDSW2005

And another thing I forgot to ask is, I heard that after the pulley swap, I will need to change the spark plugs too? I heard that the Denso IK22 is the best combination with any kind of pulleys... But how about the NGK Iridium IX?

Thanks

So how does it run now?
Start reading the MTH thread, I have been following it since the beginning but still waiting on repeatable solid results from dyno/1/4 mile tests. This is a strong possibility for me but I will wait untill at least after Ver. 39.2 is sorted out and uploaded on mine sometime this Spring.
You didn't mention what belt your using. I use a Goodyear Gatorback part #4060537 belt, it is providing me good service.

I don't know anything about the NGK Iridium IX spark plugs. I started to do the research but haven't had time to follow up. I understand the JCW kit uses a special NGK spark plug (colder) but they are way expensive and only sold to BMW, anyway that's what I have read.
I haven't changed out my plugs yet but probably will in the Spring when it starts to get warmer. My MINI is a daily driver and doesn't get driven like I'm on the track every day. Just some spirited merging or getting away from situations I'm not comfortable with on the road.
If anyone has any feed back on the NGK Iridium IX spark plugs please share your experience or maybe start a new thread on the different lower heat range plugs available. After all it is your thread!
If your still having a problem sourcing those Denso IK22 spark plugs check these guys out.
@ $9.95 USD ea. best price yet.

http://www.ltbmotorsport.com/densoik165303.html

[obehave]

I don't thiink the Iridium is important. Going a heat range colder is the important part. Particularly if it gets hot or you do a lot of stop and go or track time.
The electronics will most probably save any engine damage but it may retard timing or pump extra fuel for quenching either of which will cost you power.

I've had the Densos for well over a year. First the 20 and then 22s. They've done well.

[MiniDSW2005]

Quote: Originally Posted by norm03s

So how does it run now?


I don't know anything about the NGK Iridium IX spark plugs. I started to do the research but haven't had time to follow up. I understand the JCW kit uses a special NGK spark plug (colder) but they are way expensive and only sold to BMW, anyway that's what I have read.
I haven't changed out my plugs yet but probably will in the Spring when it starts to get warmer. My MINI is a daily driver and doesn't get driven like I'm on the track every day. Just some spirited merging or getting away from situations I'm not comfortable with on the road.
If anyone has any feed back on the NGK Iridium IX spark plugs please share your experience or maybe start a new thread on the different lower heat range plugs available. After all it is your thread!
If your still having a problem sourcing those Denso IK22 spark plugs check these guys out.
@ $9.95 USD ea. best price yet.

[url="http://www.ltbmotorsport.com/densoik165303.html"

http://www.ltbmotorsport.com/densoik165303.html[/url]

[COLOR=DarkSlateBlue]Hi, I have not install it yet, and I did just recieve the pulley from Helix, it comes with the 17% belt too, I can see it has the word "Gator" at the back, but not sure if it is made by Ford... (The brand name is Napa). I have to wait until my next vacation day for the installation though. [/color]


COLOR=Blue]Thanks for your information of the plugs! Much appreciate. But as from the previous post by obehave, does it mean if I want to try the Iridium IX, I should go for the "5" heat range instead of "6"? (The stock spark plugs' heat range is "6" I remember...)[/color]