I've heard a rumor that BEC suffer regularly with oil starvation issues... is this right? Is it down to the engine not picthing in corners like it would on a bike?
Does everyone run baffles??
Thanks in advance
As per my last thread, go easy i'm new to this!
I've heard a rumor that BEC suffer regularly with oil starvation issues... is this right? Is it down to the engine not picthing in corners like
it would on a bike?
Does everyone run baffles??
Thanks in advance
Depends what engine.
R1 yes
Hayabusa normally dry sump.
Yes and Yes. I'm running a dry sump but most go for baffled sumps, some with swinging pickups but need to take care they don't jam. For added safety I've installed ultrabright led's for the oil pressure warning light, and an engine "STOP" switch so I can kill the engine straight away if the oil light comes on. Oh yeah, and some people fit Accusumps to solve the oil starvation issue. It accumulates oil pressure and releases it into the engine if the oil pressure drops momentarily.
Ah might help,
ZX10 (old) in the back, mounted longitudinal
The old ZX10 (and ZZR1100) engines have been known to starve no.3 bearing and cause that rod to come out of the block!
There are various theories and fixes to minimise this problem.
Some onvolve reworked oil pipes on the sump but the main problem seems to be that the oil takes too long to get back from the head to the sump. This
can be helped by fitting a return hose from the front of the cam cover to the Lh timing cover. Oh - and make sure that the oil level is maintained.
As for longitudinal mounting - I suspect that with the ZX10 type sump this should not be too much of a problem.
If you are really worried you could buy a Muzzy's drysump system - not cheap (you could probably buy 5 second hand ZX10 engines for the
price).
[Edited on 2/2/09 by minitici]
Something like that?
zx10 head drain
Like this!
cam cover
picture of hole in cam housing
Ta very much
Pulled the sump off and looking at it i can't really see any reason it needs more baffling!
whats peoples thoughts on running an 954 fireblade engine?
quote:
Originally posted by Meeerrrk
whats peoples thoughts on running an 954 fireblade engine?
quote:
Originally posted by Hellfire
quote:
Originally posted by Meeerrrk
whats peoples thoughts on running an 954 fireblade engine?
Generally - all blades run pretty well with no mods... but I'd baffle just in case.
Steve
CBR 954 has proved to be a sound way to go. We have supplied an awful lot of these and generally dont have many issues. A baffle plate is a must if
you are going anywhere near a track and all ours are fitted with the billet sump. Main reason for the sump is two fold - to tackle surge and increase
ground clearance. We have tried chopping the original and reworking it but the results were not brilliant. when we machined the original sump we did a
flat bottomed copy of our 919 version gave it to Mr Clarksons crew on one of their stunt buggies and told them to try and blow it up - and they did!
So we subsequently had to redesign the 929/954 sump to incorporate an additional swirl pot on the bottom. Since then we have fitted about 60 sumps
with no probs on some fairly quick kit.
Only other issue with 954 is its gearbox - they really arent strong and need carefully thought out and sympathetic shift systems.
Hope thats useful
regards
Andy
Andy B, PM sent on this topic.
After having the sump off, i can't really see any way (or real reason) to baffle!
The oly place the oil could go is upwards into the gearbox... but thats so high up compared to the pick up... Do i really need to do it?
If so... any idea?
Rescued attachment Image083.jpg
And engine side...
Rescued attachment Image084.jpg
Sorry for the bump... but any ideas?
When you corner hard (on a long corner especially) all the oil moves to one side and up toward the gearbox. Leaves the pick-up sucking air. It
doesn't happen in the bike because the bike leans in the corner and the forces are resolved through the centre line, just like the bike was going
in a steight line.
The fact that it has happened to people should be all the proof you need.
adrian
quote:
Originally posted by adithorp
When you corner hard (on a long corner especially) all the oil moves to one side and up toward the gearbox. Leaves the pick-up sucking air. It doesn't happen in the bike because the bike leans in the corner and the forces are resolved through the centre line, just like the bike was going in a steight line.
The fact that it has happened to people should be all the proof you need.
adrian