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Old Aug 12th, 2014, 07:26 PM
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Is a 20% pulley reduction safe if done right?

I have been looking at the Kavs motorsport 20% pulley reduction to do to my 05 r53 and im wondering if anyone else has tried this. I plan to combine this with my own water to air intercooler (different discussion) and my stage 3 snow system water method system. I feel these combined will solve the problem with excessive heat.

Another issue I hear is belt slippage which can be solved with several of the adjustable belt tensioners that are sold. Also I heard someone say once about a "sticky" belt which I would assume has better grip compared to oem and I'm wondering where I could buy one. My water pump is also new (gates).

My supercharger is freshly rebuilt with new stronger pto gears and 3 warranty and also I am not a race car driver so this won't see constant redline.

Will I need bigger injectors? 400cc? Tune?

Right now I have custom header to tips exhaust, ddm intake, Detroit tuned bpv, fluid damper, Msd coil with ngk iridium.
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Similar Threads
Thread Thread Starter Forum Replies Last Post
Pulley reduction 15-17-19 ? Swarley First Generation MINI Tuning 11 Jul 17th, 2014 10:09 PM
06 R53 with JCW210 - Opinions Wanted on Should I Add 2% OD Crank Pulley? jj-snax First Generation MINI Tuning 14 Feb 10th, 2014 11:08 AM
Need someone to fit my reduction pulley and BPV? edwardtobia First Generation MINI Tuning 2 Jul 30th, 2013 09:10 AM
idler pulley question Miniblu First Generation MINI Cooper S 1 May 25th, 2013 06:00 PM

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