thanks for the info. Over heating is my biggest concern. I live in sacramento ca and it gets cooking during the summer. My MCS hasnt had a summer season yet. i am think of 17% for my cooper...

Any thoughts on the 17&??? Thanks again. keep the discussion going. Loving the info.

 

I live in Miami, FL and it gets hot as hell here even in the winter. So I decided to get a better intercooler (I made my own). I think that the only problem really with the more you reduce the pulley is the greater heat that is greated. So just try to solve the heat problem.

 

the following, from Flatsix, is false and it is a mis-statment of what has been quoted from Randy.

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

 

I have the 19% Promini pully on my 2003 MCS, it work very well...and good quality, also i have upgrade the ECU by G-Power Germany, the performance is good !

 

I am wondering what has been the "Real world" total mileage testing of these 17% and 19% pulleys? Are we talking about 3K, 7K, 10K, 50K or 100K miles?

Is anyone willing to share REAL testing data documentation that shows these pulleys to hold well with no discernible engine and supercharger wear for thousands of miles down the road in different driving environments?

So far, I have not seen such documentation.

 

Hey cooper4us,

I have had my 19% on for approx. 40,000 miles, not a problem yet, some of that without an upgraded intercooler about half i would say, as well a fair part of that is testing or racing at the track, probably within the next month or so, i will be pulling teh supercharger off, fo i am changing some things, i will eb posting some pics of it, so we shall see if there has been any sign of to much stress.. so keep a look out......

 

>>I live in Miami, FL and it gets hot as hell here even in the winter. So I decided to get a better intercooler (I made my own).

Redline0026,

Could you give us more details on this?

 

>>I am wondering what has been the "Real world" total mileage testing of these 17% and 19% pulleys? Are we talking about 3K, 7K, 10K, 50K or 100K miles?
>>
>>Is anyone willing to share REAL testing data documentation that shows these pulleys to hold well with no discernible engine and supercharger wear for thousands of miles down the road in different driving environments?
>>
>>So far, I have not seen such documentation.

over 10k on 17% pulley, car still running rich at 11 to 1 A/F ratio when tested on the dyno.

Sorry about the lack of quality.

No problems, No check engine lites, Plenty of Drag strip tests and one autocross, I do not drive litely and put that 10k miles on my car in a 4 months.

 

I didn't feel like paying $1,000.00 I'll try to post some pics for you guys of my intercooler later.

So, back to the topic. I am pretty sure that I am going to pick the Alta pulley since it is at a good price and it is supposedly Dum-@SS proof (I'm a good mechanic, but you never know). But my main concern is, I have heard that the length of the belt that comes with the Alta pulley is prone to failure. Is this true? I have heard RandyBMC say that for him the Napa (don't remember if this is the one, but when I get the pulley I'll make sure) 25060539 might be better than the one that are coming with the pulley. Has anyone else had this experience?

Thanks,

 

BTW: I didn't know that Dum-@ss was going to be a link. Go figure.

Sorry,

 

Robert, I am one of the officers for our new club, "Minis of Miami". We meet every thursday at 8PM in West Kendall. If you would like to attend this week's meet, please send me a PM and I'll give you more details.

 

>>Robert, I am one of the officers for our new club, "Minis of Miami". We meet every thursday at 8PM in West Kendall. If you would like to attend this week's meet, please send me a PM and I'll give you more details.

Sounds great.

 

Redline0026,

I look forward to the pictures of your intercooler (hopefully you'll start a new thread so this info doesn't get buried!) :smile:

 

I will try to keep all the information up as long as I can. I think I'm gonna start a thread about making your own cheap aftermarket parts. I know that some parts can not be made by the average joe, but most of them can. And in some instances they may even be better.

But back to my question. What about the belt Alta sells with the pulley? Has anyone had any problems with it or should I go with another size?

So many questions so little time.

 

>>I will try to keep all the information up as long as I can. I think I'm gonna start a thread about making your own cheap aftermarket parts. I know that some parts can not be made by the average joe, but most of them can. And in some instances they may even be better.
>>
>>But back to my question. What about the belt Alta sells with the pulley? Has anyone had any problems with it or should I go with another size?
>>
>>So many questions so little time.


Redline0026, I agree 100% the DIY crowd needs our own forum so the good stuff doesn't get lost in all this old rehash of the same old stuff if you know what I mean.

 

I think I'm gonna open up a shop called DIY, I'll make the parts and sell them at extremely low prices.

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

 

I agree - either a DIY forum or have all the DIY threads stickied at the top of their respective categories!

 

>>Hey cooper4us,
>>
>>I have had my 19% on for approx. 40,000 miles, not a problem yet, some of that without an upgraded intercooler about half i would say, as well a fair part of that is testing or racing at the track, probably within the next month or so, i will be pulling teh supercharger off, fo i am changing some things, i will eb posting some pics of it, so we shall see if there has been any sign of to much stress.. so keep a look out......

How much driving do you do in your car. Last month you had 20,000 miles on the 19% pulley according to a post you had. At this rate, you should hit 100,000 miles on the pulley in three more months.

 

>>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.

That is in Hawaii, which is like a whole 'nother country. I don't think it works the same in the States

I think all of the graphs have shown that there is increased boost, that there is denser air getting into the engine, regardless of temperature. No matter how hot it is outside, the 19% pulley will always put denser air than the 15% in the engine. What is also interesting from the various graphs and dyno's on NAM is that the boost is continuing to climb up to the redline, which indicates that the supercharger probably has more capability.

As far as the wear the engine is encountering with the 19% pulley, I don't think that anyone can argue that the engine is experiencing more wear than with a 15% pulley, with that said I think it has to still be shown if that wear will cause engine failures within the normal lifetime of the engine. Based on some of the engine work being done on the Mini, I don't think we will see engine failure, but may see the supercharger wearing out sooner. Obviously no one has 100,000 miles on a 19% pulley so we cannot tell what the effects are of the 19% pulley. People are taking the Mini engine to 300-350hp with no problems on stock internals and I think most people will say that the engine is pretty strong. I think all of these statements hold true for the 15% pulley over stock as well, and we haven't seen any issues.

Randy's incident was an isolated case, which could be from a combination of a number of factors and shouldn't be construed as an issue with a properly installed taper bore 19% pulley.

I personally am still on the fence on this one and will just sit on the sidelines examining as more cars receive the pulley and more miles are put on, to see if any problems arise (or not). Call me a chicken, but I am okay with the 15% that I have right now.

 

Hey Chicken!

Nah, j/k.

I agree with you on the denser air and everything else. But like I had previously stated, I believe that you can run the 19% with no problem as long as all heat issues are addressed first.

I posted the question of which pulley should I purchase now that I have decided to go with the 19% over the 17%, and 15%? The only way I came to the conclusion that I am going for the 19% pulley is with a modified intercooler. I would never even think of running the 17% or 19% pulley without a better intercooler (especially in Miami, FL).

BTW: can anyone help me with my previous question about the Alta pulley and belt combo. Who has it and how do you like it? Should I replace the belt to a shorter one if I get the Alta pulley?

Thanks,

 

Redline,

I would definitely replace the belt if you go to a 19% pulley. I think it is borderline for a 15% pulley but definitely needed for a 17% or 19%, and the 21% that I am sure will be out soon. Most of the reputable tuning kits on the market are replacing the belt.

 

Thank you for the response What I was asking is the belt that Alta is supplying with its pulley a perfect fit or should I go and get another size? I have heard of some belts being damaged over time or slipping.

Thanks,