what is the part # i need at what belt is best

 

you can use the stock belt

 

This is easy.....
Gatorback belt by Goodyear
part#4060537
thru Summit Racing
http://www.summitracing.com/
This belt is awesome.It enhances the whine of the S.C.,and makes a beautiful
winding noise.It felt like I got a tune up(compared to the p.o.s.belt I took off of it.)

 

 

Hahahaha HighLife...so it continues.

Use NAPA belt 25060539 or 25060535...or the Gatorback belt listed above.

NOT the stock belt.

- Matt

 

Thanks Matt I was feeling a bit tired

 

I've used a stock belt for 20K with zero issues.

 

you can use JCW belt

 

I was using a stock belt with a 15% pulley for 30K+ miles with "no issues" too - until I put my car on a dyno and saw that the belt was slipping and I was getting boost spikes and losing power. Then I got the NAPA 535 belt.

 

i assume the NAPA belt 539 is 4mm longer than the 535? which belt is better here? can it be too tight?

 

what the copi said. the napa 535 is correct. as long as it can be put on it shouldnt be too tight. i was using the gatorback 537 and the tensioner had no hole showing. now with the napa 535 the full hole plus is visible. mechanics have told me though that there is some error in all the belts so sometimes youll find the same size off by a bit.

 

I went to the NAPA website and could not find "25060535" i also manually typed in my engine and came up with this :

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Browse Catalog >> Belts & Hoses
Vehicle: 2003 >> Mini >> Cooper >> Don't Know



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Product Name Item Number Price SelectBelt - A/C

Engine:1.6 L 1598 CC L4;
PBH
6K415 $12.99

Belt - A/C

Engine:1.6 L 1598 CC L4;
NBH
25060415
$22.49

Belt - A/C

ATM
6PK1053 $20.69

Belt - Water Pump & Alternator

Engine:1.6 L 1598 CC L4;
NBH
25060547
$24.49

Belt - Water Pump, Alternator & A/C

ATM
6PK1388 $25.59


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napa 060535

 

Define "no issues."

I'd be almost certain you're getting belt slip on the supercharger (and not making peak boost) in your case.

- Matt

 

Depends on who's pulley he is using.

 

Is this the same size of Napa's 060537?? If so, I found it to be a little too big for the 15%.

 

Not really. As long as he doesn't have an upsized crank pulley to take up the slack, any of the reductions should not be using the stock belt.

- Matt

 

Just to clarify, is the Napa 060535 or 060539 that is the best application for 15% reduction pulley and OEM crank?

 

Napa 060535

 

535 is the correct belt for 15%

 

Didn't say there will be problems, but if you want to actually get the most out of your pulley, use a belt that fits, not one that is so loose it starts slipping at 5k RPM's.

If you're going to have the pulley off anyway, why not spend $20 on a belt? If it snaps, it's going to cost you 20x that for a new crank pulley when it self destructs...

The 535 belt works well for a 15% pulley.

 

Removed all that crap cause the HTML makes it hard to read your question.

Give Danny a call at MINICorsa, he can recommend a place to get belts local to you.

 

so wich belt would you guys suggest for a 17% pulley