yok
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| posted on 31/12/07 at 11:38 AM |
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Blackbird sump
Looking for some information. I have a blade engined locost with a shortened sump and was looking at a blackbird. Does anyone if the blade sump would
fit the black bird, thanks.
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BenB
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| posted on 31/12/07 at 12:19 PM |
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If you're going to drive a blackbird powered car with any gusto (e.g. track days) then it's generally considered best to dry sump the
blackbird engine... I doubt the shortened blade sump would fit anyway...
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Mr Whippy
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| posted on 31/12/07 at 12:35 PM |
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why is this? is it because a bike would normally lean into the corners so the oil does not slop around as in a car?
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BenB
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| posted on 31/12/07 at 12:52 PM |
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Partially that but it's also that the G forces in a car are different to a bike. The oiling to one of the bearings is rather suboptimal on the
blackbird design. Add in some G forces and you get insufficient flow to that bearing (I seem to recall it's no 3) and a popped engine....
For road driving wet sump is okay (unless you drive like a complete loon on the road that is!!).
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yok
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| posted on 31/12/07 at 02:10 PM |
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Cheers for the info, i'll have a rethink on what to do as it will be used for sprints etc. Thanks again.
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Jon Ison
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| posted on 31/12/07 at 02:26 PM |
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Hi, #3 rod is the one to go, it shares its oil supply with a balancer shaft, it can be got around by internal engine mods but the advice above is
sound, anything more than pottering about will without doubt see a rod thru the side without some sort of protection sooner rather than later. good
strong engine though.
Oh, the blade sump wont fit, for your sort of work I would suggest R1 or ZX12 power plant, both for blackbird money.
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Paul TigerB6
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| posted on 31/12/07 at 06:12 PM |
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Have you considered an R1 (or ZX10R depending if your budget will stretch) which should give similar or maybe more levels of power.
Have you confirmed the regulations for the class that you will run in?? I seem to remember sub 1L BECs could run with the 1600cc and under car engined
racers when i looked into it a few years back. Might be totally wrong but it could influence your decission as to engine so worth looking into.
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Minicooper
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| posted on 31/12/07 at 06:35 PM |
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Isn't the main problem with the Blackbird is that the sump is dramatically cut down for the installation into the 7 type car and the capacity is
not restored.
If you don't cut the sump down and put a simple baffle plate the problem doesn't arise or at least is no worse than any other bike engined
car
Cheers
David
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Jon Ison
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| posted on 1/1/08 at 04:04 PM |
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quote:
Originally posted by Minicooper
Isn't the main problem with the Blackbird is that the sump is dramatically cut down for the installation into the 7 type car and the capacity is
not restored.
If you don't cut the sump down and put a simple baffle plate the problem doesn't arise or at least is no worse than any other bike engined
car
Cheers
David
I'm sorry but Ive seen more than enough evidence to disagree.
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Minicooper
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| posted on 1/1/08 at 06:04 PM |
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No problem Jon, but every failure I've heard about has had these heavily shortened sumps on.
I've seen these sumps up close and the capacity is massively reduced to a point it's not sensible to do anything involving corners or
spirited driving
I can see in your gallery that you've had a blackbird powered car with a dry sump fitted, did you have a car that had several engines failures?
one guy did but I can't remember who
Cheers
David
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ChrisGamlin
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| posted on 1/1/08 at 07:24 PM |
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quote:
Originally posted by Minicooper
... did you have a car that had several engines failures? one guy did but I can't remember who
Possibly thinking of BenB's brother Dan (Bromilow)
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