Is it safe to run a 15% pulley reduction on a 100% stock R53?

Aug 28, 2020 · Greetings MINI owners I own a 100% stock, 1st gen, 2004 (pre-facelift), R53 MINI (No Teflon on the super charger screw, hence 163HP) I just ordered a pulley with a 15% reduction from Craven Speed and want to know what the draw backs are from swapping the OEM pulley …

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Is It Safe To Run A 15% Pulley Reduction On A 100% Stock R53?

16 hours ago

minitorque.com

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15% Or 17% Supercharger Pulley - MINI Cooper Forum

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Jun 2, 2014 · 17% is ok to run on a stock bottom end as long as it's heathy. you can run with a …

mini2.com

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Just Had My R53 Fitted With A 15% Pulley And Dyno'd! : R/MINI

16 hours ago

The 15% refers to how much smaller the pulley is than the stock pulley. Because the new …

reddit.com

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Is It Safe To Run A 15% Pulley Reduction On A 100% Stock R53?

16 hours ago

Aug 28, 2020 · First Generation MINI - R50, R52 & R53. R53 General. Is it safe to run a 15% …

minitorque.com

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Recommendations For More Power In R53 - MiniTorque.com

16 hours ago

Apr 8, 2020 · For 'any' pulley you really need a map, especially in a hot country. A 15% pulley …

minitorque.com

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15% PULLEY & STANDARD SPARK PLUGS : R/R53 - Reddit

16 hours ago

Bkr7equp is what I run in my 15% and my gp. The 7eix are ok too. I’d the jcw runs a step …

reddit.com

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R53 15% Pully : R/MINI - Reddit

16 hours ago

R53 15% Pully . I have a 2005 R53 as my daily and project car. Currently, I haven’t done any …

reddit.com

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1st Gen - R53 - Cooper - S - 15% Vs. 17% SC Pulley

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Apr 22, 2012 · Sorry Kellen, I should've stopped by and picked up the craven pulley. I did end …

motoringalliance.com

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Results Of Fitting A 17% Pulley To A Cooper S R53

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Aug 8, 2010 · Well mine is supposed to be 163 at stock. However apparently there can be a …

overclockers.co.uk

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Supercharger Pulley 15% And 17% Reduction - Alta Performance

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Pulley Size. ALTA Supercharger Pulleys are offered in two sizes: 15% and 17% reductions. …

altaperformance.com

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R53 JCW, Power Differences Between A 15% And 17% Pulley

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Jun 17, 2022 · So the stock JCW pulley is 10%smaller than the S model pulley so a 15% pulley …

mini2.com

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Engine - Drivetrain - 1st Gen - Cooper - S - 15% Vs 17% Pulley

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Jul 30, 2009 · I went with a 15% on my JCW. The JCW pulley I took off measured to be …

motoringalliance.com

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R53 Cooper S 17% Pulley Reduction - MiniTorque.com

16 hours ago

Apr 17, 2017 · First Generation MINI - R50, R52 & R53. Engine & Drivetrain R53 Cooper S …

minitorque.com

FAQs about Is it safe to run a 15% pulley reduction on a 100% stock R53? Coupon?

What % pulley should I use?

The % refers to the amount of reduction ... a 17% pulley is small than a 15% which is smaller than a 11%. As you lessen the size of the pulley you get more torque in the lower RPM range. The JCW Engine Tuning Kit comes with about a 11% reduction pulley. A 15% reduction pulley is probably the most common choice. Yeah a 15% is the better option. ...

Does a 2% decrease in pulley size increase power?

I based them figures on what I was just told that the difference between the 15% and 17% is a 2% increase in power. Now I have a JCW 210 with a 10% smaller pulley than the S models. So if what I was just told is true that a 2% decrease in pulley size equals a 2% increase in power then that's how I came to them figures. ...

How much horsepower does a 15% pulley make?

A 15% pulley gives a good 20 or so wheel horsepower, doesnt overdrive the M45 supercharger, and is probably on the limit of heat increase and what the stock IC can deal with. ...

What is the power difference between a 15% & 17% supercharger pulley?

Hi all just a quick one, can some o e please tell me what sort of power difference there is between a 15% and 17% supercharger pulley. Cheers all So the stock JCW pulley is 10%smaller than the S model pulley so a 15% pulley would give me 5%/220bhp more power than stock and a 17% being 7% smaller will give me 224bhp ...

How much balancing does a pulley have?

In the machine shop we balanced our prototype pulley to within 0.1 gram at 16000RPM (even better than stock). Data from that balancing was added to the model and applied to all production parts ensuring the entire part is balanced. 15% and 17% reductions. ...

How do I remove a supercharger pulley from a Mini Cooper s?

Here you'll find the correct belt required for your particular supercharger pulley setup. The ALTA Pulley Removal Tool is the perfect tool to reliably remove the factory supercharger pulley from your MINI Cooper S (tool does not work on JCW or GP pulleys). You can purchase your own tool; perfect for club events or group installations. ...