Need help figuring out my oil starvation problem :( 66hp down the toilet!?

[r00st]

So I built my raptor a couple of years ago using quite a few parts from various venders (Kenny, High desert Dyno, KB, Barkers TQS and etc). Its a KDS big nasty head with TQS piston (I think it was a 12.5?) stock bore with RJ cam, +1 TI valves, beehive springs, evac valve, Barker standard duals, FCI intake with No toil filter, dynatek with custom curves from HDD and was dyno tuned on the PC3.

I dont get to ride very much anymore but we do sill ride the LIttle sahara sand dunes annually. This year my quad was still king of the hill and ran like a CHAMP until the VERY last day we took a ride up to 10,000 feet in Moab utah. We decided to ride the gravel logging roads back down the mountain and its a very driftable road (a lot of WOT 3rd/4th gear corners). I took one corner too hot and ended up in the ditch and ran over a couple of boulders. I tweaked a rear rim but everything else seemed fine so I continued down the mountain knowing the rest of the guys were hauling ass right behind me.  I got to the second to last corner and hear a really loud metal on metal sound. I figured my headers were coming loose so I shut her down and checked but all the heat shields and pipes were tight. I fired it up again to hear the noise and realized it was all inside the top end. I thought maybe when I hit the rock I cracked the case and drained the oil and had a case of oil starvation. I opened the oversize aluminum oil reservoir (I think its a UM product?) and oil literally FLEW OUT, lost probably half a quart as the reservoir was pressurized.

We loaded the quads up and drove th 22 hours home and the entire time I was trying to think what the hell happened. My best guess was I somehow pinched an oil line and it was not returning the oil back to the crankcase. When we got home I checked the oil lines and they look fine (it would afterall be hard to pinch a line that runs right on top of two thick frame rails...). I have not had the time to pull the top end yet but I am totally stumped as to what happened?

Is the oil pump on this a pull through or push through? I am thinking it did not fail as it did a good job of pressurizing the oil reservoir...?

I built this motor myself originally but am not all that familiar with the bottom end on these. Being that the motor still RUNS and was only running for about 10-15 seconds while it was making noise, what all could be toast? As long as there was SOME Oil left in the crankcase will the crank/bearings be ok?

It did not lock up so I am hoping the head is ok but I am not sure how much damage could be done in a situation like this???

Anybody with any insight as to what could have happened or what my possible damaged parts list is please chime in!

I am a recent homeowner and have since bought a crotch rocket and a 2012 mustang 5.0 so needless to say I dont have a ton of cash sitting around that can be thrown into my ride-it-4-times-a-year money pit of a raptor  

Also, we rode probably 30 hours but right before we left I filled her up with 2.5-3 quarts of amsoil 15w50 synthetic, a fresh plug and a clean filter (and she got a clean filter halfway through the trip as well). I had dynoed it right before the oil change and she made 66hp/51tq on what was stated as a "stingy" dyno and we cleaned up the couple of rough spots it had on the AFR.

[r00st]

I posted this on RF as well and have a couple of ideas from over there. Someone wondered if the oil tank was over filled. It showed in the middle on the dipstick (oversize tank uses stock stick...). I certainly hope the manufacturer of the oversized tank accounts for the design of the tank so that the stock dipstick readin "normal" is in fact a safe volume of oil for that tank. It could have cavitated/air locked possibly?

My thought was, if you run any old raptor hard and get the oil up to temp and pull the dip stick immediately after shutting it down, will the oil reservoir be pressurized slightly? If that answer is in fact YES, then my seeing oil fly out of the reservoir probably has nothign to do with my top end noise and I probably have something loose in the cam/valvetrain.