ESE's works engine tuner

[husaberg]

Yes, i'm using 'backups' to finetune the blades, it was late yesterday after a full day of headscratching of where my power was(dynoday)
I'll try to stiffen it up today to see if it?s the answer.
I'm missing the last 500-600rpm, pipe is tuned for 13200, but now i stuck at 12600.
It has produced 69hp at 13200rpm with this pipe before, and now 56hp at 12600.
I recon i won't gain all back to 69hp, but 63-65hp might happen if it could rev past 12600 and produce power all the way, but with more torque than before due to better crankcase.

I am confused, Hp is the rate of work, ie calculated torque with the RPM.
so how if could it rev the same producing less HP, yet have more torque?

[Flettner]

Glen, nah, no need for a solid model for the CNC, I'll just make one on the pattern bench. I have a set of 175 cases cast up but with no balance shaft provision. Or provision for s second rotary valve case on the other side. And the gearbox I've modelled it around might be on the light side.
Back to the old whats best for a gearbox. Must have wide even gear spacing (WR) , robust (not Honda), cheap and readily available.
I'd just about choose a 350 Kawasaki gearbox, I have a few, they just don't break, but there change mechanism is a bit Heath and Robinson. So perhaps not.
Suzuki ? Were their gearboxes any good? Can't really go to the wreakers any more and sift through the bins, like the old days.

[Flettner]

There is something you don't see every day, a motorcycle engine based around an O200 Rolls Royce aircraft engine cylinder.
Down at my storage cow shed, looking for something else and I tripped over this. Built this when I was an apprentice at AHI plastic products. Made the patterns from Kauri from my old school that was pulled down. Managed to pilpher some four by twos before they torched the heap.
My first foray into casting, lawnmower flywheel, CB 750 gearbox, an old one at that, made the camshaft myself. As per usual I never finished it, supercharged Honda 100 got in the way, then uniflow and so on.

Don't ask why, To be old and wise, first you must be young and stupid, I guess half of that came true.

[husaberg]

There is something you don't see every day, a motorcycle engine based around an O200 Rolls Royce aircraft engine cylinder.
Down at my storage cow shed, looking for something else and I tripped over this. Built this when I was an apprentice at AHI plastic products. Made the patterns from Kauri from my old school that was pulled down. Managed to pilpher some four by twos before they torched the heap.
My first foray into casting, lawnmower flywheel, CB 750 gearbox, an old one at that, made the camshaft myself. As per usual I never finished it, supercharged Honda 100 got in the way, then uniflow and so on.

Don't ask why, To be old and wise, first you must be young and stupid.

AHI i remember the milking plants and the cup removers especially.
there is still a few around.
They later became Waikato? with another name in between?

casting look pretty sophisticated with the webs under the cam tubes. and under cylinder. plus around the bearings.
looks like you stacked the gearbox as well to keep it short?

[Flettner]

Arh, now we see, you are here touting for work, Luc.

[Flettner]

AHI i remember the milking plants and the cup removers especially.
there is still a few around.
They later became Waikato? with another name in between?

Guilty.....
Remember the plastic sandals, us too.

[husaberg]

Guilty.....
Remember the plastic sandals, us too.

Might have been Carter holt then waikato or alflex thown in.
bloody interesting history with AHI,i thought you worked for DRI or one of the predecessors.
https://www.office2u.co.nz/news/2/AH...imited-History.

[Flettner]

Machined the connecting rod out of a solid piece of AHT28. That took a while but came out beautiful in the end, spent hours polishing it. Pressed up crank.
Cases were cast out of old Austin A40 differential heads, nothing but the best.

Back in the day, AHI ( then carter holt Harvey) had a monopoly so almost everything plastic was made by us.
Lawnmower catchers
telephones
All manner of plastic bottles
200 L drums, drums of all sizes.
milking equipment
Everything, it was a good place to do an apprenticeship, with a very well equipped tool room and some clever cookies.

[Haufen]

Thanks TZ, for your invitation, but the Kiwi history here is by far not friendly enough to do so.

Well Luc, the thing on this site is: no one will prepare a red carpet for you if you just keep on bragging and screaming for attention.

There are people on this site with more experience, more race wins, more drag racing championships, higher specific performances, more precise calculations, better cylinder head designs and whatever else than you. And this is with leaving Jan, Wobbly and Frits aside.

But does it matter? Do people even know? Do they care? Does anybody care? No.

They come here for the joy and the passion, to help others, exchange views and also lean something new from time to time. If you are looking for fanboys you might be better off enlisting in one of those singstar tv shows on national television. If you would like to become a valuable member of this board, you are overdue to start sharing some precise, detailed, proven and - of course - free information to earn some credit.

[TZ350]

If you would like to become a valuable member of this board, start sharing some precise, detailed, proven and - of course - free information to earn some credit.

Bringing something to the table for all to enjoy is certainly the way to participate here.

[Haufen]

Bringing something to the table for all to enjoy is certainly the way to participate here.

I am sure Luc has lots he could bring to the table. But he has not done it here so far. And it looks like he has gotten off on the wrong foot with almost everybody in here. And from his post it seemed to me that he expects people to kind of bow down before being worthy of being preached the holy two-stroke grail. Both these last things may or may not happen, what I meant to say was that the order should be the other way round.

[SwePatrick]

I am confused, Hp is the rate of work, ie calculated torque with the RPM.
so how if could it rev the same producing less HP, yet have more torque?

Not more torque in peak number, but more torque as in wider band.

[SwePatrick]

I thought i'd share with you, the funniest looking dynograph ever.



You get a hint if looking at the filename.
Yes, it seized today. *lol*
Big end bearing went out for lunch.
But no worries, i've got spare rod,pin and bearing

[Haufen]

I thought i'd share with you, the funniest looking dynograph ever.

Could it be that your clutch started slipping at around 55 hp? Or has the shape of the power curve always been like this?

[SwePatrick]

No, it actually seized during that pull, the flat top shows the engine was about to seize.
It suddenly had a lot more resistance to turn over, a lot more friction, it ate the power and made the flat top.
Peak power is at about 12600-12800 otherwise.