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Old 15th February 2006, 02:28 PM   #21 (permalink)
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What guessing games am i playing? You confused me now glen.

But anyhow, whats the answer, intriguing if nothing else.
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Old 15th February 2006, 02:33 PM   #22 (permalink)
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Answers

I dont know the definative answer as it wasnt my engine, its not a riddle, its a genuine interest as to what happened.

I think that what happened was the engine suffered oil starvation, ran the bearing and it got that hot that it locked up and smahed itself to bits, torn the bolts and eventually throwing itself out of the block whilst in the meantime causing an awful mess of the psiton and gudgeon pin.

The reason I think this happened is due to the blue hot markings around the bearing section of the rod and the way that the bolts are jammed into the rod, they didnt just shear, they were twisted and torn. At some point the base of the rod got hot enough to turn blue.

It came out of the BeeR R32/R34 D1 car at Irwindale. Glen picked it up off the track and it came out that clean, ie with no oil on it at all.

Its pretty impressive which is why I stole it from Glen and kept it

But, I dont know anything about anything so I am most probably wrong
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Old 15th February 2006, 04:07 PM   #23 (permalink)
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Could that be due to the wrong rod length ratio's?????
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Old 15th February 2006, 04:18 PM   #24 (permalink)
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Your depth of field could do with a little work old chap.
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Old 15th February 2006, 09:23 PM   #25 (permalink)
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Spun bearing causing bolts to yield/snap. Small end looks like a result of thrashing after it left the piston due to piston breakage possibly from being dragged back down the bore and the piston hitting the crank web. If the pin broke the small end bore would be about the same size i reckon. It looks just sqaushed to me. Like to see the piston though. Not sure it would balance up again lol.
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Old 15th February 2006, 10:14 PM   #26 (permalink)
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Pre-ignition or the piston jamming due to oil lose?
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Old 15th February 2006, 10:59 PM   #27 (permalink)
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Did you sit on it?
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Old 16th February 2006, 09:56 AM   #28 (permalink)
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PMSL @ Graham!
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Old 16th February 2006, 04:56 PM   #29 (permalink)
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Oil starvation to the big end bearing i reckon, especially if the bigend of the rod shows 'blueing', this will stretch and snap the bolts leaving the rod behind, crank journal comes round again and smashes it out through the side. The flatened out small end is probebly where the crank caught it between the crank journal and the side of the block.
Am i right in saying that RB crank journals and bearings are to narrow and so being the weakest link??
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Old 17th February 2006, 05:26 AM   #30 (permalink)
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sorry to hear about the engine failure, set the boost controller wrong maybe?


i notice rb26 rods twist,and rb25 snap in half when something goes wrong
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