What's up all... I have a technical question for anyone that can help. Here is the setup:

Edelbrock Performer EFI intake
E cam
MSD Billet distributor
Melling high volume oil pump
Stock oil pump shaft (2nd shaft was FMS hardened)

OK... I got the motor rebuilt about a year before I blew the first shaft. I was driving down I-4 and I saw my oil pressure gauge drop to 0. I towed it back to my shop, and had it checked out. We couldn't find anything... we cleaned out the old oil pump hopefully to find something that got stuck. All we found was that the shaft just snapped in two...

So I put new bearings and a new high volume pump, but this time I put a Ford Motorsport hardened shaft in there. About 20 miles after that was done, I blew ANOTHER shaft at about 5000 RPM...

I am stumped. I have no idea what would be causing this, and my car hasn't moved in over 6 months. Any help would be greatly appreciated.

-dave