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Double key or single?

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Old Dec 24, 2015 | 07:40 AM
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Default Double key or single?

Hi all, I'm about to drop my new build in and wanted to see what you guys think or have experienced as far as double keying the ati balancer with a serpentine supercharger I.e A&A' s Si trim kit. I have a forged Callie's dragonslayer and it came with 2 key ways already machined in. The ati has only one keyway, so before I send it off to be keyed for another keyway..is it necessary?? I've heard of people shearing keys but is that on cog drive superchargers or should I even worry being that I'm going to be using the serpentine belt system. Thanks!
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Old Dec 24, 2015 | 08:02 AM
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Do a second if you will sleep better, but one is fine. Imagine all the people with stock cranks use just a small pin with no key.
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Old Dec 24, 2015 | 08:07 AM
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I am on the same page, thanks!
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Old Dec 24, 2015 | 08:13 AM
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Originally Posted by realcanuk
Do a second if you will sleep better, but one is fine. Imagine all the people with stock cranks use just a small pin with no key.
Ditto. Have a Callie crank and ATI balancer as well, but no blower and have not had any issues with one key way.
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Old Dec 24, 2015 | 08:42 AM
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Hey thanks for your feedback!
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Old Dec 25, 2015 | 07:58 PM
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Default minimal cost

Originally Posted by BrownVette
Hi all, I'm about to drop my new build in and wanted to see what you guys think or have experienced as far as double keying the ati balancer with a serpentine supercharger I.e A&A' s Si trim kit. I have a forged Callie's dragonslayer and it came with 2 key ways already machined in. The ati has only one keyway, so before I send it off to be keyed for another keyway..is it necessary?? I've heard of people shearing keys but is that on cog drive superchargers or should I even worry being that I'm going to be using the serpentine belt system. Thanks!
double keyed and double pinned my ATI for a little extra insurance.no need to send out.have it done at local machine shop.cost about $30.
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