Harmonic Balancer bolt

[Kevin Panzino]

I use a stud and 15/16? nut kit that Callie?s sells. The large nut has a bunch of surface area to grip on the balancer. Never had an issue and it?s very nice having a stud and nut for the snoot threads rather than a bolt.
And yes, big springs do make it harder unless you have roller cam bearings, because the cam is down hard on the Babbitt with no hydrodynamic wedge yet while just turning by hand.

Kp

[Ed McLawhorn Jr.]

Originally Posted by Kevin Panzino

I use a stud and 15/16? nut kit that Callie?s sells. The large nut has a bunch of surface area to grip on the balancer. Never had an issue and it?s very nice having a stud and nut for the snoot threads rather than a bolt.
And yes, big springs do make it harder unless you have roller cam bearings, because the cam is down hard on the Babbitt with no hydrodynamic wedge yet while just turning by hand.

Kp

Kevin, hadn?t thought about a stud. Yes, I have babbitt bearings and it?s harder to turn.

[Kevin Panzino]

Yes, its a very nice setup. They make them in a bunch of lengths, so you will have to do some measuring to get the correct length. I have heard ARP makes these for Callies, but I am not sure. I can tell you, its not Chinese junk, (speedmaster etc). I've had the same one for probably 15 years now and its as good as new. Black Oxide isnt even barely worn off of the threads.

Link below.

https://www.callies.com/components/stud-kits/


Kp

[Mike Pearson]

I have the ARP balancer bolt. Works fine for turning the engine by hand. 350 seat pressure on my springs. I do have roller cam bearings and that does make hand turning a bit easier but has no real performance gains.