Hi everyone,

First off, my appologies if this has actually been discussed somewhere else, I have been searching on both this and corvetteforum for hours regarding this, I just cant get a clear answer. Purchased a new ATI pn 918853 Dampener, that came with the AC pulley... this is to go along with the 8 rib crank procharger pulley pn DC033A-082 which is a 7.4". This is derived from a GTO kit, but going on an LS6 Cts-v.

Now, I purchased the Pinning kit (Procharger version aka, horizontal...) pn, 3GKMM-004.
Which has a 0.25" pin.

Normally, as most instructions and pictures i see on here, show, easy peasy with stock crank pulley... slap this 3GKMM on, drill away and pound pin in.
This Jig will not FIT on the inside of the 918853 dampener HUB that goes on the crank snout. It does however have a 0.1905" key... I am not removing the crank to do this properly.

Can I successfully Pin this using a 3GKMM pinning kit or is it a MUST to purchase the ATI Performance Products Pinning kit aka Vertical. which has 3/16" pins that will fit along the keyed area in the hub when sticking out of the crank snout... again, crossing fingers you get it aligned?

the only thought I had was to drill the 'half moon' into the hub (opposite key groove), then the other half on the crank snout, then hope I have luck to align the two with the 0.25" pin gracefully laying on the crank half moon...

suggestions?
tricks?

All info is welcome.

If you aren't removing the crank at this time to key it, which I completely understand. I didn't do it either on the stock motor, I would recommend going with the ATI Performance Products pin kit. This way you haven't modified the balancer hub for the round pin and can reuse it when you build a forged motor and can have a keyway machined into the crank.

sounds logical.
Wasted money on the wrong pinning kit.

If I understand your question properly, the problem is that the spacer will not fit inside the balancer.

What I did was carefully grind down the outside diameter of the ProCharger pinning fixture so it properly fits inside the balancer hub. Then you can drill as intended.

Personally I would use the ATI pinning kit instead as it puts the pin in shear for added strength. This kit puts a pin in the crank only that is aligned with the ATI keyway in the hub. It is not used to pin them together.

Lonnie, that is correct. With this procharger pinning kit, the jig will not go down the ID snout to allow drilling of both hub edge and crank snout. There would be a ton of cutting down for this to work, and then deep drilling as the keyway portion area is quite long. I appreciate everyone's suggestions and have decided to pin via ATI pinning kit.

For measuring,
I found the jig to be 2.100" and the hub I.D. 2.035", so more or less 0.1" would need to be removed from the jig.

In all my searches I never once read someone having to remove material from the jig to make this work with the ATI hub for the super damper.

get a long drill bit

and how would help getting the Jig into the hubs against the crank snout?
all you would have is a pivot point for the long drill bit but have introduced an array of possible drill points.
with this comment, I may as well go free hand.
*smart*

This thread was solved by buying the PROPER Pinning kit for this setup as stated above.