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We had the crank internally balanced for the least amount of internal stress. Big strokes do not respond well to external balancing. We also wanted to simplify the front balancer and the flywheel by not having them have to have balancing weights.
The crank was balanced by milling holes in the counterweights and tig welding chunks of heavy tungsten based Mallory metal to the counterweight itself.
LS cranks tend to spin the crank angle sensor reluctor wheel off the crank causing the ECU to lose crank sync.
Our own team fell victim to this with our famous engine builder motor which created a DNF. To prevent this from happening ever again, we tig welded the reluctor to the crank.
Our Lunati signature series crank’s journals were nitrided and micro polished for a hard and smooth bearing surface.
We chose Callies Ultra Connecting Rods for our motor. We chose these rods because they are the longest off the shelf rods available for the LS. We did not want to resort to any one-off custom parts in case we needed a replacement quickly mid-season.
The rod bolts are custom made for Callies by ARP out of super strong Custom Age 625 steel. The rod bolts are canted to allow for more internal clearance on big stroke engines like ours.
The rods themselves are machined from a custom blended proprietary clean steel alloy from Timken.
