Wadders
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| posted on 9/8/04 at 08:36 PM |
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Not sure if this is relevant, but IIRC in the early bec days, some people tried to use sierra propshaft rubber doughnuts (very similar to the beemer
one in the photo) for some reason becs tore them to pieces. Seems weird as some sierras, V6 ect put out much more torque and bhp than most becs. Maybe
its the rpm they dont like?
i]Originally posted by sgraber
Dennis Palatov of DPcars.net is attaching his Hayabusa engine using rubber donuts from a BMW driveshaft... Does this help? (Since I have no practical
experience in these matters)
edit - oops link to http://www.dpcars.net it's the little silver beasty he's building...
[Edited on 8/3/04 by sgraber]
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ned
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| posted on 10/8/04 at 08:59 AM |
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Wadders,
I would have guessed it would be both the rpm and the speed at which the revs rise on a bec which is quite different to a sierra I would imagine.
Ned.
beware, I've got yellow skin
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tadltd
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| posted on 12/8/04 at 08:58 PM |
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Spunky - can you be ABSOLUTELY certain that you have removed ALL vibration from you set-up?
When designing the LMP we specifically avoided this set-up because there is no way that you can assume everything is rigid and free from movement. If
you put a small camera in there, and pointed it at the 'prop', you'd be amazed at how much movement you'd see.
That's why we adopted a 'normal' sliding prop' and in 2 years of testing, it has never let us down.
There are pictures in my photo archive - admittedly poor - but you can just about see our set-up.
Best Regards,
Steve.
www.turnerautosport.com
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spunky
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| posted on 12/8/04 at 09:09 PM |
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Steve, A very far point, and TBH There aint no way I can be sure, The engine and diff are rigid and aligned as good as possible, the only way I could
have done a better job would be with dynamic alignment setting. There is little vibration when driving, in fact it is better than I expected.
I asumed, maybe incorrectly, that a double UJ prop, even one so short, would allow a tiny amount of misalignment.
Lets not forget that the LMP is in a different league to my little Sp1der...
John
The reckless man may not live as long......
But the cautious man does not live at all.....
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