R50/53 Supercharger pulley questions ????
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3rd Gear
Joined: Sep 2011
Posts: 205
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From: FL 321
Supercharger pulley questions ????
Just got a 03 mini s , only thing has is a drop in filter k&n , was wondering what size pulley to get , i seen a 15% and a 17% , how much boost do they put out , is it like a night and day diff,
i use to own a pontiac gtp supercharged 3.8 i droped down too pulley size and it was like night and day , i loved it ,
does it make the supercharger louder ? It did on the gtp ,
i see the supercharger is a eaton m45 , pontiac was a m90, soo it's a lil smaller ..
i use to own a pontiac gtp supercharged 3.8 i droped down too pulley size and it was like night and day , i loved it ,
does it make the supercharger louder ? It did on the gtp ,
i see the supercharger is a eaton m45 , pontiac was a m90, soo it's a lil smaller ..
1st Gear
Joined: Dec 2010
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From: Easton Md
i would go with a 15% smaller pulley just because anything smaller and you have the risk of damaging or blowing the charger, and yes it is a night and day difference im not sure about the boost difference though. Yes a 15% smaller pulley will make your charger screammm.
15% is great for daily driving, good, reliable fun. I noticed a difference the second I got above 2500rpm and the smile barely leaves my face since.
Anything over say 17% you are running a slight risk of problems, and requires more upgrades to keep things straight for daily driving(or so I have heard).
As for the noise, I think adding a CAI let more sound into the cabin, the pulley is just going to make the SC spool faster.
Anything over say 17% you are running a slight risk of problems, and requires more upgrades to keep things straight for daily driving(or so I have heard).
As for the noise, I think adding a CAI let more sound into the cabin, the pulley is just going to make the SC spool faster.
i would go with a 15% smaller pulley just because anything smaller and you have the risk of damaging or blowing the charger, and yes it is a night and day difference im not sure about the boost difference though. Yes a 15% smaller pulley will make your charger screammm.
2nd Gear
Joined: Jan 2010
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Not sure what your long term goals are for your MINI, but, if it is gonna be your DD, and you want some fun along the way, you should be happy with that simple combo.
Let us know how it works out for ya!
Let us know how it works out for ya!
6th Gear
Joined: Sep 2004
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From: Orange County, CA
I've had a 19% Alta reduction pulley (along with a GIAC ECU flash, colder Desno IK22 plugs, JCW fuel injectors, and a Milltek cat back exhaust) on my 2005 MCS for nearly 6 years now and it still runs like the day I put it on.
6th Gear
Joined: Sep 2005
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From: Laurel MD
I have been running a 17% for a few years now with no issues. If you are going to track the vehicle I would say go with a 15%. The reason is heat... If you are running WOT for a long period of time, the heat soak will destroy your HP. If you are just a daily driver, then the 17% will give you more HP down low.
It all depends on how you plan to drive.
Then they likely had an issue with their SC from the beginning. Lots of people have been running 17 and 19% with no issues.
I have been running a 17% for a few years now with no issues. If you are going to track the vehicle I would say go with a 15%. The reason is heat... If you are running WOT for a long period of time, the heat soak will destroy your HP. If you are just a daily driver, then the 17% will give you more HP down low.
It all depends on how you plan to drive.
I have been running a 17% for a few years now with no issues. If you are going to track the vehicle I would say go with a 15%. The reason is heat... If you are running WOT for a long period of time, the heat soak will destroy your HP. If you are just a daily driver, then the 17% will give you more HP down low.
It all depends on how you plan to drive.
+1
Summmed it all up.
Extra sound will come mostly from the cai...different ones make differant amounts of sounds...also depends on if the plastic part behind the cai is cut with a holesaw, or full removed to add airflow...
1st Gear
Joined: Jul 2010
Posts: 34
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Hi all,
Will my stock 04 JCW r53 tell me if I have a boost leak or low boost? It just seems like sometimes it's there and sometimes it's not. I did get a DT BPV, but have not installed it yet. Should I get a boost gauge installed?
Thanks
hattenzoom
Will my stock 04 JCW r53 tell me if I have a boost leak or low boost? It just seems like sometimes it's there and sometimes it's not. I did get a DT BPV, but have not installed it yet. Should I get a boost gauge installed?
Thanks
hattenzoom
6th Gear
Joined: Sep 2005
Posts: 3,925
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From: Laurel MD
Not really... If you have a boost leak, you will feel it in the way the car pulls. If you have the original BPV on there then that is likely your culprit. Get the new one on asap and you should be in great shape!
1st Gear
Joined: Nov 2009
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From: Chandler, AZ
Everyone of these replies said either 15% or 17%. I had a larger one on my 03 and before my car had 30,000 miles, the Supercharger blew. Let me tell you that if you blow one, it's EXPENSIVE. I therefore agree with most comments about going with something 17% or smaller. Therefore, I suggest you split the difference and do a 16%. There is one company making this and it's one of the BEST made - period. I have one on my "new" supercharger and gave up my new "warranty" on the supercharger because I have so much confidence in this brand and product. My suggestion is to buy then16% pulley from M7 Tuning. Here is the link form you.
http://www.m7tuning.com/parts/produc...&products_id=1
6th Gear
Joined: Sep 2005
Posts: 3,925
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From: Laurel MD
Not so fast.
Everyone of these replies said either 15% or 17%. I had a larger one on my 03 and before my car had 30,000 miles, the Supercharger blew. Let me tell you that if you blow one, it's EXPENSIVE. I therefore agree with most comments about going with something 17% or smaller. Therefore, I suggest you split the difference and do a 16%. There is one company making this and it's one of the BEST made - period. I have one on my "new" supercharger and gave up my new "warranty" on the supercharger because I have so much confidence in this brand and product. My suggestion is to buy then16% pulley from M7 Tuning. Here is the link form you.
http://www.m7tuning.com/parts/produc...&products_id=1
Everyone of these replies said either 15% or 17%. I had a larger one on my 03 and before my car had 30,000 miles, the Supercharger blew. Let me tell you that if you blow one, it's EXPENSIVE. I therefore agree with most comments about going with something 17% or smaller. Therefore, I suggest you split the difference and do a 16%. There is one company making this and it's one of the BEST made - period. I have one on my "new" supercharger and gave up my new "warranty" on the supercharger because I have so much confidence in this brand and product. My suggestion is to buy then16% pulley from M7 Tuning. Here is the link form you.
http://www.m7tuning.com/parts/produc...&products_id=1
1st Gear
Joined: Nov 2009
Posts: 42
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From: Chandler, AZ
DAFLAKE. You are entitled to YOUR opinion and I am entitled to mine. If you do some research, you will clearly see that the materials used, the weight and the thickness created are different in many pulleys. There are several really good pulleys available, but there are also some BAD ones. I am not going to name the bad brands in an open forum but I will say which one I think is best from my research. Again, this is just my opinion.
The main point I was offering was that he could have a 16% size which nobody else offered. It's a nice compromise between the 15% and 17% that everyone else suggested.
The main point I was offering was that he could have a 16% size which nobody else offered. It's a nice compromise between the 15% and 17% that everyone else suggested.
6th Gear
Joined: Sep 2005
Posts: 3,925
Likes: 2
From: Laurel MD
DAFLAKE. You are entitled to YOUR opinion and I am entitled to mine. If you do some research, you will clearly see that the materials used, the weight and the thickness created are different in many pulleys. There are several really good pulleys available, but there are also some BAD ones. I am not going to name the bad brands in an open forum but I will say which one I think is best from my research. Again, this is just my opinion.
The main point I was offering was that he could have a 16% size which nobody else offered. It's a nice compromise between the 15% and 17% that everyone else suggested.
The main point I was offering was that he could have a 16% size which nobody else offered. It's a nice compromise between the 15% and 17% that everyone else suggested.
As for the 16%, sure, it is a compromise but none of the 17% that I have installed had an issue to date. Oh, and I did have an issue with an M7 once not fitting correctly on the shaft. We ended up having to send it back for another one as it wasn't cut correctly (that high quality you spoke of). I never had this issue with any other pulley.
3rd Gear
Joined: Dec 2010
Posts: 246
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From: Bailieboro Ontario
Just got a 03 mini s , only thing has is a drop in filter k&n , was wondering what size pulley to get , i seen a 15% and a 17% , how much boost do they put out , is it like a night and day diff,
i use to own a pontiac gtp supercharged 3.8 i droped down too pulley size and it was like night and day , i loved it ,
does it make the supercharger louder ? It did on the gtp ,
i see the supercharger is a eaton m45 , pontiac was a m90, soo it's a lil smaller ..
i use to own a pontiac gtp supercharged 3.8 i droped down too pulley size and it was like night and day , i loved it ,
does it make the supercharger louder ? It did on the gtp ,
i see the supercharger is a eaton m45 , pontiac was a m90, soo it's a lil smaller ..
Try the forum search and you'll find pulley talk up the wazoo!!!
on a hot and humid weather, is it advisable to use 17% pulley? Also, would like to ask do you need to change the plugs and injectors when you change your pulley? (what spark plug should i use). lastly, is it safe to use 17% pulley if you you track your car once a year or doing some spirited driving for about an hour? many thanks!
btw, i use 100 octane gas or 95-97 octane with ethanol (not sure if that helps). thanks!
btw, i use 100 octane gas or 95-97 octane with ethanol (not sure if that helps). thanks!
Last edited by scoopy; Oct 30, 2011 at 10:24 PM.
6th Gear
Joined: Sep 2005
Posts: 3,925
Likes: 2
From: Laurel MD
on a hot and humid weather, is it advisable to use 17% pulley? Also, would like to ask do you need to change the plugs and injectors when you change your pulley? (what spark plug should i use). lastly, is it safe to use 17% pulley if you you track your car once a year or doing some spirited driving for about an hour? many thanks!
btw, i use 100 octane gas or 95-97 octane with ethanol (not sure if that helps). thanks!
btw, i use 100 octane gas or 95-97 octane with ethanol (not sure if that helps). thanks!
How hot of a summer? I live up north and have no problems, but if I lived in Texas I would probably look for a bigger IC (GRS) to deal with heat soak. You will lose power with high temps. Also, for tracking you will be safe but again, heat soak is your enemy.
really hot and humid during the day. so 17% pulley plus 380 or 450cc injectors and a bigger intercooler should do the trick?