[vdubdoug]

Well I spent the day down in Philly, I went to Geno's and had a cheese steak and the headed over here for some desert



This was the desert tray Yummy


Now since I have already tasted the first 2 (stock & 15%) for 24k miles I thought the third one (17%) was the way to go

Here it is installed:

And yes anything fits with a hammer :P


Thanks again ERIC.

The car has been runniing great and I can feel a difference, First gear requires 2 hands on the wheel if I really get on it. I am only running a 17% pulley, wires and K&N typhoon intake. 6th gear acceleration from 3k is very nice. More road testing and some drag race testing to come.
Here is the Test vehicle:


Am I the first to run 17%?????

[blackdogmini]

Doug:

Cool shots of your mini and the Helix shop. So how much front tire do you have left?

[mrhollio]

nice ride... keep us posted on the rest of the testing. How was the cheese steak?

[vdubdoug]

I have plenty of front tire left. It has been raining the past couple of days so i have not had allot of good weather to get on it. I have a 2 hour drive to work this morning so that should be fun

And the Cheese steak was great as usual

[Minimalistix]

as it sez im a newbee
hmmm i wanna learn... is there any smaller pulleys then 17s ???

[MiniMan7]

Quote: Originally Posted by Minimalistix

as it sez im a newbee
hmmm i wanna learn... is there any smaller pulleys then 17s ???

Yup, people usually use 15% reduction pulley's. This is the first I've seen or heard of a 17% reduction pulley, but then again, I'm no professional.

-Adam

[Minimalistix]

hihi you understand by the wrong way

i mean smaller sized for example 17% smaller than 15%s )

so is there 18s or 20s ??

[MiniMan7]

Quote: Originally Posted by Minimalistix

hihi you understand by the wrong way

i mean smaller sized for example 17% smaller than 15%s )

so is there 18s or 20s ??

Opps!! Guess I'm the newbie when it comes to this!

Sorry!

-Adam

[obehave]

Quote: Originally Posted by Minimalistix

hihi you understand by the wrong way

i mean smaller sized for example 17% smaller than 15%s )

so is there 18s or 20s ??

If I remember right jlm and Helix did most of the original testing on reduction pulleys over a year ago. I'm pretty sure they did a 20% and saw no real performance gains over the 15. (They did a 10% as well).
Everybody is pretty much working on the foundation they laid in my opinion. Probably the single reason I'll go to Helix to get mine done.
Too small a pulley will also have less grip surface and would start to slip under load easier as well. I'm sure there's more.

[greatgro]

Quote: Originally Posted by obehave

If I remember right jlm and Helix did most of the original testing on reduction pulleys over a year ago. I'm pretty sure they did a 20% and saw no real performance gains over the 15. (They did a 10% as well).

No, not true. About the 20% not providing better gains, that is. Eric has been doing a lot of testing. in fact, even though vdubdoug just got his 17% installed, Eric just installed a 19% pulley!!!! And talk about gains....it dynoed 19HP and 15lbs of torque higher than an MCS with a similar setup with a 15% pulley!!! The gains are supposedly unbelieveable! It's just whether it proves to be reliable over the long haul. There are several issues to consider such as the water pump and the supercharger rev limit. But if the redline on the MCS was moved down a few hundred RPM, I think 19% might be the ideal size. Even MORE power and most important - MORE power down low!

[vdubdoug]

The reason 15% was done was becuase people fealt it was a safe limit for most drivers. I am testing the 17% to see how it works for some one who drives there car about 500 miles a week or more. I was given the oppurtunity to run a 19% but thought that might be a little much for my daily driving and stuff. The overspinning (Cavatation) of the waterpump seems to be more myth than fact. Now as for the charger One could over rev it most likely with a chip installed but I do not have a chip yet and still have the stock revlimiter in there. My car spends most of its time below 6k but I will get on it from Time to time.

The 17% pulley is working out Nicely. Plenty of usable torque in every gear and no downshifting to pass when cruising at 2500 to 3000 rpm in 6th .

I plan on running the car at Englishtown tomorrow night. I want to see what i run with it. My previous best was a 15.2 with a 60ft time of 2.7 (which sucks). If I can run a smiliar 60ft time and make up more time down the track then I know the 17% pulley is doing what i wanted it to do.

[obehave]

Quote: Originally Posted by greatgro

No, not true. About the 20% not providing better gains, that is. Eric has been doing a lot of testing. in fact, even though vdubdoug just got his 17% installed, Eric just installed a 19% pulley!!!! And talk about gains....it dynoed 19HP and 15lbs of torque higher than an MCS with a similar setup with a 15% pulley!!! The gains are supposedly unbelieveable! It's just whether it proves to be reliable over the long haul. There are several issues to consider such as the water pump and the supercharger rev limit. But if the redline on the MCS was moved down a few hundred RPM, I think 19% might be the ideal size. Even MORE power and most important - MORE power down low!

Ooooo Kaaaay so I was wrong on one point. Rack that up to crappy memory.

Anyway what about belt slippage? It takes the same mechanical effort to spin the SC so at some point, especially without changing belt tension, you're going to lose decent belt/pulley friction. Loss of HP and belt life would then become a problem.
Any info on that would be nice.
Personally I'd gladly give up some upper RPM for more bottom end grunt.

[vdubdoug]

We will find out how soon a belt wears out with a 17% since I drive allot. That is part of the reason why Helix let me test this pulley out. Plus I badgered Eric for weeks and made him do it when I stopped by the shop. . I will keep everyone aware of any belt issues that occur.

[jlm]

we tested the 15% and 10% last january and realized the 10% was a waste of time. Eric was so excited with the first pulley he worked up a frenzy (15%, and no-one had put one on yet "How to's" were yet to come)

[obehave]

Quote: Originally Posted by vdubdoug

We will find out how soon a belt wears out with a 17% since I drive allot. That is part of the reason why Helix let me test this pulley out. Plus I badgered Eric for weeks and made him do it when I stopped by the shop. . I will keep everyone aware of any belt issues that occur.

Excellent, thanks.

Quote:

we tested the 15% and 10% last january and realized the 10% was a waste of time. Eric was so excited with the first pulley he worked up a frenzy (15%, and no-one had put one on yet "How to's" were yet to come)

There you go then, the final answer.

[bluesmini]

trey the guy from cat and dog racing has been using a 17-19% pulley from the get go. i can't remember which. he has a website but you'll have to go to MCO to find it. he has about every performance option that's out there on his car. i'm sure he'll have some good input on this subject.

[blackdogmini]

Cool Stuff. I'm waiting (im)patiently for resulsts.

[jlm]

I might add an important feature of the 2 pc pulley is that you can change-out pulley ratios without re-doing the full install. This was the intent from the start. Therefore, you can go back to stock size, and/or use any ratio that fits. 15% has had a lot of testing with absolutely no problems which tells me it is not pushing the limit. 19% has had considerable testing on at least 4 rigs I know of and been hammered at the drags and track with no problems. Not as wide a database, but the point is...no problems.

found on another forum (by Bisch):
"I called Mini Mania to ask about getting a smaller size pulley for their 3-piece set-up, as I have. When I ordered the pulley, they said other diameters were available. Their website says they are interchangable. ~~~"This unique 3-piece design allows installation of the pulley onto the shaft without a press, and enables easy removal to change the pulley size." ~~~ But, THEY DON'T MAKE THEM! nor do they have plans to.
I bought their set up because it was "interchangable"! Not only did it take me 6 freaking hours to install because of their "pulley removal (not) tool", but the product I bought will not do as it was represented."

hope that helps

[obehave]

Quote: Originally Posted by jlm

I might add an important feature of the 2 pc pulley is that you can change-out pulley ratios without re-doing the full install. This was the intent from the start. Therefore, you can go back to stock size, and/or use any ratio that fits. 15% has had a lot of testing with absolutely no problems which tells me it is not pushing the limit. 19% has had considerable testing on at least 4 rigs I know of and been hammered at the drags and track with no problems. Not as wide a database, but the point is...no problems.

found on another forum (by Bisch):
"I called Mini Mania to ask about getting a smaller size pulley for their 3-piece set-up, as I have. When I ordered the pulley, they said other diameters were available. Their website says they are interchangable. ~~~"This unique 3-piece design allows installation of the pulley onto the shaft without a press, and enables easy removal to change the pulley size." ~~~ But, THEY DON'T MAKE THEM! nor do they have plans to.
I bought their set up because it was "interchangable"! Not only did it take me 6 freaking hours to install because of their "pulley removal (not) tool", but the product I bought will not do as it was represented."

hope that helps

I was going to get yours any way John

[Mugami]

JLM with the 17% and/or the 19% is it necessary to change to the smaller Belt Like the one Mini madness sells with there 15% pulley? Currently like most im running the 15% I got from helix, and been thinking of the 17 and or the 19% pulleys . I was wondering of an est. price that just replacement Pulleys may cost. I couldnt find a price on helixs sight as of yet.