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Machining the stock SC pulley

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Old 08-18-2012, 09:40 PM
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W212 - E63 AMG
Machining the stock SC pulley

Has anybody taken their chances with this? If so, how far did you go and what would be a good/safe size to be, before you really need a tune to ensure security?

I'm contemplating having a few mm removed in a bid to gain more power.
Old 08-18-2012, 10:02 PM
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There was a member snogard, he was able to machine it down to 82mm. But he said something about laser welding and very expensive to replicate.
Old 08-19-2012, 12:45 AM
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Originally Posted by Celicasaur
Has anybody taken their chances with this? If so, how far did you go and what would be a good/safe size to be, before you really need a tune to ensure security?

I'm contemplating having a few mm removed in a bid to gain more power.
why not just get the smaller S/C pulley that's available?
Old 08-19-2012, 10:04 AM
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I wouldn't take any chances, just get the new smaller sc pulley. The stock bearings are known to go on them anyways.
Old 08-21-2012, 09:37 AM
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82mm eh...do you know what that would equate to, on a crank pulley? ie, would it work out to what a 175mm pulley is?
Old 08-21-2012, 10:07 AM
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Originally Posted by Celicasaur
82mm eh...do you know what that would equate to, on a crank pulley? ie, would it work out to what a 175mm pulley is?
Stock sc pulley is 90mm. So you'll go from 1.94 ratio to 2.13. That would be about 1.5 psi (I'm just guessing here).
Old 08-21-2012, 10:38 AM
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^^^ Perfect, that's what I needed to know. Thanks man.

That's a perfect amount I guess...I'm only looking for a very gentle increase in power, without having to worry about getting it tuned and buy injectors etc.

I'll see if I can get the work done to it for a reasonable price. If it works out within like $200 of the cost of getting the smaller pulley, then I'll just get the pulley instead.
Old 08-21-2012, 01:39 PM
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The smalle sc pulley is equivalent to about a 168-17mm crank pulley
Old 08-24-2012, 06:01 AM
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Where can i get a smaller supercharger pulley?, my bearings already messed up might as well change it out
Old 08-24-2012, 06:21 AM
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Originally Posted by andy_azn
Where can i get a smaller supercharger pulley?, my bearings already messed up might as well change it out
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Old 08-24-2012, 12:56 PM
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Looking for source for smaller S/C pulley here as well. Anyone? Thx.
Old 08-24-2012, 01:22 PM
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Originally Posted by Half Fast Drivr
Looking for source for smaller S/C pulley here as well. Anyone? Thx.
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Old 08-24-2012, 01:42 PM
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looking for a s/c pulley as well. Getting grinding sounds when i stomp on the gas and s/c engages. Will the stock belt still work with this and my renntech 168 crank pulley?
Old 08-24-2012, 01:47 PM
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Originally Posted by novae500
looking for a s/c pulley as well. Getting grinding sounds when i stomp on the gas and s/c engages. Will the stock belt still work with this and my renntech 168 crank pulley?
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