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When is it necessary to pin the crank/damper?

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Old 03-17-2017, 09:19 PM   #1
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Default When is it necessary to pin the crank/damper?

OK guys, thinking about adding a ATI Damper onto my 5.3. When do you start thinking about pinning it in place? My current setup has a max RPM of 6200 rpm and 6000 rpm shift points. Making around 440 Crank Hp and 425 Crank Tq. I have no plans for boost or really any other mods at this point, at least for the 5.3.
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Old 03-17-2017, 10:06 PM   #2
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superchargers and prochargers are a must, and big turbo builds. imo i wouldnt worry bout it.
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Old 03-19-2017, 03:13 AM   #3
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awesome, thanks for the answer man.
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Old 03-19-2017, 10:10 AM   #4
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There's nothing keeping the balancer from spinning on the snout except for the press fit and the bolt clamp load. When you add extra load to the belt drive, like from a supercharger for example, the crank snout needs to be pinned into place to keep the balancer from spinning. In some aftermarket ignition setups, you may also want to pin the balancer in order to verify ignition timing with a timing light.
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Old 03-19-2017, 09:21 PM   #5
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Thanks for the info KCS. So I am assuming since I have not added any extra load to the pulleys, no plans for Boost, that I should be fine without pinning it. The stock Damper/Pulley was doing just fine, the darn rubber started to crack and small section has started to deteriorate, fall apart. I also talked to ATI and they said the same thing as you KCS, and that I should be fine without it. Tho, they did try and sell me their $150 pinning drill guide/jig kit.
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Old 03-29-2017, 09:23 AM   #6
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I always pin the crank regardless of application. It takes 10 mins and is cheap insurance.
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Old 03-29-2017, 10:08 AM   #7
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Not needed because your not running a Supercharger, but we do most Corvettes and other cars that require alot of labor to get to it. This way if we add a supercharger later on we don't have to deal it.
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Old 03-29-2017, 06:26 PM   #8
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Quote:
Originally Posted by KCS View Post
There's nothing keeping the balancer from spinning on the snout except for the press fit and the bolt clamp load. When you add extra load to the belt drive, like from a supercharger for example, the crank snout needs to be pinned into place to keep the balancer from spinning. In some aftermarket ignition setups, you may also want to pin the balancer in order to verify ignition timing with a timing light.
This, my ATI un-keyed balancer spun off twice before I keyed it and locktited the ARP bolt. Now it doesn't move
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