well basically some trash(metal) has got caught in the rod bearings and Oil. and the bearing is wearing out. changing u'r oil often and on shcedule can help prevent it, nothing is a garuntee.
usually lack of oil during high rpms. at 7000 rpms along with strong g-force, there might be enough oil in the pan to barely cover the pick-up tube. I always add an extra quart in the pan for just for this.
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Originally Posted by Jake@EPP
Some claim 600ish on stock bottom end, but i think those people have short blocks laying around, at that power level its like walking around with a torch in a firework store
01' SS M6 Hard-Top 1SC Stripper. Procharged F1A 370
There are several reasons a bearing will spin, one that not many people realize is the geometry of the housing bore that the bearing sits in. The press fit of the bearing in the housing bore is responsible for holding the bearing in place and keeping the bearing's geometry correct. This is why I cringe when people upgrade their rod bolts in without resizing their rods.
Then, like mentioned, there is an oil film issue. For whatever reason, the journal of the crank can make contact with the bearing and take it for a ride. Anything from a bent crank to excessive blowby can cause this. Preventative maintenance is your first line of defense against such problems.
I agree that saying bad oil delivery could be a major contributing factor in causing a spun bearing. In fact, I change my synthetic oil every 2,500 miles (Obsessive Compulsive). But anyways, my question is, "would upgrading to a Ported LS6 Oil Pump help with this oil delivery problem?" Just curious with this thread...thanks.
Theres a bunch things that can cause a bearing to spin.
A couple more things on top of whats listes here are, too high of RPM for a long time, gas in the oil, too much clearance between the crank/rod journal and the bearing, etc.
__________________ Allyn 2000 Camaro SS A4 # 3535,milled 243's with Cometic .045,custom Comp XE 230/236 cam,Hookers with catted Y,flowmaster catback,LS6 intake,FAST 36# injectors,3400 Vig. stall '86 IROC-Z race car - 565",TH400, 5.63 @126 so far http://i32.photobucket.com/albums/d1...Picture001.jpg
I agree that saying bad oil delivery could be a major contributing factor in causing a spun bearing. In fact, I change my synthetic oil every 2,500 miles (Obsessive Compulsive). But anyways, my question is, "would upgrading to a Ported LS6 Oil Pump help with this oil delivery problem?" Just curious with this thread...thanks.
I doubt it. A ported oil pump is gonna drain the oil pan quicker. I believe the only way to prevent oil starved bearings on high rpm motors would be an Accusump. Its acts like an oil reserve until you lose oil pressure or at a predetermined oil PSI. Then it turns loose additional oil to save the engine. I don't own one, but If I was winding the engine past 7,000 alot I think it would be a wise investment.
What Causes A Spun Bearing? 
