fastdonzi

That isn't too much, Have you ever over revved it? if so, how long before this? otherwise I'd guess that one of the parts didn't get heat treated properly, A hardness test proving it may get you some new stuff. Have the parts tested and compared to the other (like) parts and see, anything is possible...

aquaforce

The China factor can be problematic or nothing at all. The blue color on that rod is not good. There is something to consider with that color.

I see that 6.385 so I take it your 1/4 stroked? I have "H" beam rods in my stroker.

Rottiguy

4.375 stroke
limiters are set a 6000

Rottiguy

3 hours

Rottiguy

I didn't take it back to the original builder, it took over two years the first time around. I want to try and make it for the Lake Lanier poker run.

MASCH

With the way the housing bore looks i very seriously doubt the rod bolt is what broke first and caused your problem. More than likely the bearing let go first and as a result the bolt looks the way it does. Maybe just a personal preference/opinion but the compstar rods arent really the rod of choice for a Blown marine application. Also it appears by looking at rod/stroke combination that this must be in a short deck block? Thats a pretty short compession height piston for an application like this. Im sure others may agree or dissagree just my .002

blue thunder

Wow on the blue, mega heat. An assembly issue seems probable.

PatriYacht

Compstar rods are strong enough for 800hp and 6000 rpms. They also come standard with ARP 2000 rod bolts. I doubt if it was the fault of the rod or the bolts. The bearing spun and the rod eventually grabbed the crank and that's when the bolts let go. What caused it is most likely a bearing clearence issue, poor oiling or detonation pounded out the bearing.

SS930

There was clearly excessive heat there, that bolt did not just fail for no reason! I would agree with Masch's observations as well. Although as long as the rod swere in spec, I would say they should be more than fine for a basic blower build... I just wouldn't spin them to the moon.

FIXX

iTrader: (2)

you spun a bearing first,,thats where the blue came from then the rod cap gave out from beating on the crank then the rest is history,,if it were me i would get a complete rotating assembly but with oliver rods

show a pic of a good rod bearing and what mfr name is of the bearing..part numbers woud help also..