LBMEFM
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| posted on 15/11/09 at 08:24 AM |
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Fireblade probs
Now recovered from the recent crap track day at Lydden I have not had time to strip my Fireblade engine to see what happened. But any thoughts would
be welcome. I had been pushing it pretty hard but spun off on a section that was causing many other cars to come off, bit damp and greasy. On the
re-start I had lost drive and in trying to get the car off the circuit I probally over-reved it significantly. On returning to the pits I started the
engine put it in to gear let the clutch out no drive then a loud clattering sound, too loud for big ends, I then noticed the oil light had come on.
Questions, did the engine momently sieze on the circuit causing the back wheels to lock and causing the spin, I cannot remember dipping the clutch
during the spin would this have caused the clutch to break. Any other reasons why I have lost oil pressure or could this be caused by the spin,
wouldn't have thought so though. Any thoughts anyone ?
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Howlor
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| posted on 15/11/09 at 08:50 AM |
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Could it have done the damage going backwards after the spin? I know that can cause trouble.
Hope you get it sorted.
Steve
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ReMan
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| posted on 15/11/09 at 09:20 AM |
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Not what you want to hear, but I think you may have broken the crankshaft?
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MakeEverything
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| posted on 15/11/09 at 09:22 AM |
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^^ What Steve said.
If the engine is trying to drive forward when your spinning, then you could (im guessing) nacker the output shaft, sprockets, clutch, prop /
connector, etc
Its almost like a massive standing wheelspin, only with a wheelspin the friction gets less as the tyre and the tarmac melts. As you slide backwards,
youre using new, cooler tarmac so the friction is higher.
This is why BEC wasnt a serious contender for, as the engines are so fine, and not as strong as a car engine.
[Edited on 15/11/09 by MakeEverything]
Kindest Regards,
Richard.
...You can make it foolProof, but youll never make it Idiot Proof!...
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mark chandler
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| posted on 15/11/09 at 09:50 AM |
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If it started but you had no drive maybe the clutch basket has blown apart as a result of sliding backwards.
Mine throw a big end just before the tight lefthander, I figured that it had run dry on the long fast bend, I have since modified my baffle plate.
The joy of fireblades is the toughness and ability to keep reving. Have you a baffle and chopped sump, was it overfilled?
Unless you know the full history of the engine it could have just been fatigue, my broken engine may have done 50k before going in to my car.
Craigs friend purchased a blade powered car that had been run/abused for many track days, first run with new owner and it blew up... just because it
sounds and goes well does not mean its not on the edge.
Regards Mark
[Edited on 15/11/09 by mark chandler]
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