Dellortoman
Hero member
- Location
- Tasmania, Australia
Looks like you're only doing a couple of very minor modifications to that engine. Will only be noticeable on close inspection by serious Laverda rivet counters.
Building a race bike
- Thread starter julian
- Start date
chrisk
Hero member
- Location
- Brisbane, Australia
Julian, is the sub sump always full? With the pickup at the front, is there a chance it could starve for oil under acceleration or wheelie?
Hi,
I will baffle both the top sump and the lower sump, the lower sump will always be full and has no rear in/out so there is nowhere for the oil to go during acceleration, under braking it could come out of the top hole but the oil above that should stop that happening. The pickup pipe will actually go to about 2/3 along the sub-sump and will be able to move from side to side so will feed for some time before it gets starved even if no more oil came in. I have thought hard about it but the truth will be in the testing.
Collector pics added
Talking of mods, I was looking at it the other day and thought to myself that I sincerely hope I do not grenade it catastrophically at some point as I would really not like to do it all again.
its not quite standard, you could be right 
I will baffle both the top sump and the lower sump, the lower sump will always be full and has no rear in/out so there is nowhere for the oil to go during acceleration, under braking it could come out of the top hole but the oil above that should stop that happening. The pickup pipe will actually go to about 2/3 along the sub-sump and will be able to move from side to side so will feed for some time before it gets starved even if no more oil came in. I have thought hard about it but the truth will be in the testing.
Collector pics added
Talking of mods, I was looking at it the other day and thought to myself that I sincerely hope I do not grenade it catastrophically at some point as I would really not like to do it all again.
its not quite standard, you could be right Attachments
Laverdalothar
Hero member
- Location
- Germany
Very nice collector! It is one of the most critical parts on the exhaust and one that all Laverdas can be improved on - no matter if original systems or Keihan ones for the standard tripple. Especially the Keihan one is completely wrong designed and badly put together. On the dyno, it started to get orange red glowing at 6.000 RPM... 
; still have the remanders of it laying in my shelf somewhere... we cut it out and only used the 3 incoming and 2 outgoing pipes... the rest was put on the shelf in the "bad examples" area...
; still have the remanders of it laying in my shelf somewhere... we cut it out and only used the 3 incoming and 2 outgoing pipes... the rest was put on the shelf in the "bad examples" area...
chrisk
Hero member
- Location
- Brisbane, Australia
I like the idea of the elephant trunk swinging oil pickup.
Capable of picking up oil no matter the lean angle.
Capable of picking up oil no matter the lean angle.
Dellortoman
Hero member
- Location
- Tasmania, Australia
I wouldn't have thought there would be any advantage to be gained from an oil pickup that swings from side to side. The oil level stays the same laterally, regardless of the lean angle. The G-force is always down through the centre plane of the bike. The oil will slosh forwards/backwards but not sideways.
chrisk
Hero member
- Location
- Brisbane, Australia
I bet you swung a bucket of water ‘around the world style’ for hours when you were a kid.
Laverda1000.de
Hero member
- Location
- Haßberge, Germany
We had a Professor do that during a physics lecture and the handle on the bucket broke
Dellortoman
Hero member
- Location
- Tasmania, Australia
We had a Professor do that during a physics lecture and the handle on the bucket broke
He should have chosen a bucket that could handle the G-force. Just goes to show that while a physics professor might be a clever academic, he's not as practical as an engineer.
On the subject of science demonstrations gone wrong (apologies to Julian for the thread hijack), I remember my chemistry teacher in high school demonstrating the potassium + water reaction. But he snipped off a lump of potassium that was way bigger than he should have. It went plop into the water then Kaboom! (perhaps the chemical symbol K for potassium is from Kaboom).
The explosion shattered the beaker of water and the fluorescent light tubes above the teacher's bench. Also covered the teacher in water and bits of glass. Surprisingly nobody was hurt.
But a highly educational demonstration. Everybody in that class will remember it!He should have chosen a bucket that could handle the G-force. Just goes to show that while a physics professor might be a clever academic, he's not as practical as an engineer.
On the subject of science demonstrations gone wrong (apologies to Julian for the thread hijack), I remember my chemistry teacher in high school demonstrating the potassium + water reaction. But he snipped off a lump of potassium that was way bigger than he should have. It went plop into the water then Kaboom! (perhaps the chemical symbol K for potassium is from Kaboom).
The explosion shattered the beaker of water and the fluorescent light tubes above the teacher's bench. Also covered the teacher in water and bits of glass. Surprisingly nobody was hurt.
cheers,
bazzee
Dellortoman
Hero member
- Location
- Tasmania, Australia
Yes. Obviously I never forgot it.
I had to scrap that idea anyway as the rear stud on the connecting block to the sump goes straight through that line of passage so any flex I could organize would be too minimal to care about.
It will be a fixed central pickup instead.
J
chrisk
Hero member
- Location
- Brisbane, Australia
At least that proves you are actually human, not some alien freak that conjures up 40 year old wicked motorbike engines.
Problem is Chris that in honesty I come out with 500 ideas a day, 501 of those get thrown in the bin as rubbish, Then the magic one pops up and off we go. Until something buggers that up also. I suppose that's what makes it fun. Finding the trick that sticks 
J
J
sideshow
Hero member
I know all about that! But you still are genius!Problem is Chris that in honesty I come out with 500 ideas a day, 501 of those get thrown in the bin as rubbish, Then the magic one pops up and off we go. Until something buggers that up also. I suppose that's what makes it fun. Finding the trick that sticks
J
CLEMTOG
Hero member
"I wouldn't have thought there would be any advantage to be gained from an oil pickup that swings from side to side. The oil level stays the same laterally, regardless of the lean angle. The G-force is always down through the centre plane of the bike. The oil will slosh forwards/backwards but not sideways."
what you dont know Cam is that when J has finished playing with his bike, has had a pilot on it for a few races and speed record attempts (worlds fastest Laverda?) that he has agreed to give it to me so I can bolt on a sidecar.
CLEM
what you dont know Cam is that when J has finished playing with his bike, has had a pilot on it for a few races and speed record attempts (worlds fastest Laverda?) that he has agreed to give it to me so I can bolt on a sidecar.
CLEM
Andy J
Hero member
- Location
- Isle of Man
oh yer Clem, only if you can first push it from Liege to Bastogne and back
Few snippets of recent work,
Made internal baffles also and hope to be able to weld it all up tonight,
Also have a top inlet at the back of the sump that will have a little trapdoor / ball valve so that it will allow oil in when under acceleration but not suck in air under braking.
Made internal baffles also and hope to be able to weld it all up tonight,
Also have a top inlet at the back of the sump that will have a little trapdoor / ball valve so that it will allow oil in when under acceleration but not suck in air under braking.
