ESE's works engine tuner

[Peljhan]

I am wondering. If we have an engine with matching STAs let's say 30hp for each system (intake, transfers and exhaust) and we measure 30hp on a dyno.
Than we make-increase STA on one of the systems to 40hp. What would we measure teoretically?

[wobbly]

As long as everything in your sim is capable of achieving the 30 Hp of the STA prediction, depending upon the inertia of the vehicle components and the friction component, then you
will measure something like 14% less on a rear wheel Dynojet = 25.8RWHP.
EngMod calculates crank power - so if you now upgrade every part of the engine ( not just change the ports ) then the same applies to the new prediction.
Note the Exhaust STA is pretty much irrelevant ( except when using the duct exit radio button shortcut ), its the Blowdown that is highly important.

[katinas]

Sliding pipes from eighties. I just wonder when they really started using it.

From 21:21- https://youtu.be/2RZ86QoA-qI?si=ZuxwBLNCCw_762ih

From 0:35 https://youtu.be/D1e_vKt8Va0?si=lATwZp9HRV_D4QAw

[Jonny snatchsniffer]

I know most of you on here dont like air cooled 2 strokes because of thermal limitations, but i have what i have, its a 200cc lambretta piston ported no reed, the intake is only 153.5, exhaust angle 180, a and b transfers at 120, boost port 122.5, now im using a pipe from the 80's which has a long parallel header, also a 28mm pwk, the inlet is bridged, tz350, you probly know about the ported stuff, tho saying that most of us have been there done that, but my thing is Italian shopping bikes, and wobbly, when you worked with Jim did you do any of the scooter, like the jl3, jl4 lambretta pipes? And could they be improved upon?
I dont have engine mod and just threw it together with the above timings and thrashed the fuck out of it 140M to a rally but runs out of puff at 8000rpm @76mph gps
I know its over 60 yrs old but I'd like get more out of it
My 125 1966 vespa has 27 rwhp so surely I can get more out of a 200, thi over square at 58x66
So what should I be doing in my man cave to get it singing a bit more? I'm also stud limited and single chef hat exhaust port

[wobbly]

The scooter pipe thing happened after I left JL.

[Gradella23]

The scooter pipe thing happened after I left JL.

hello Wob, any sneak peek on the newcoming Kz R3? I saw Franco joined LKE, i was quite shocked

[Wos]

I know most of you on here dont like air cooled 2 strokes because of thermal limitations, but i have what i have, its a 200cc lambretta piston ported no reed, the intake is only 153.5, exhaust angle 180, a and b transfers at 120, boost port 122.5, now im using a pipe from the 80's which has a long parallel header, also a 28mm pwk, the inlet is bridged, tz350, you probly know about the ported stuff, tho saying that most of us have been there done that, but my thing is Italian shopping bikes, and wobbly, when you worked with Jim did you do any of the scooter, like the jl3, jl4 lambretta pipes? And could they be improved upon?
I dont have engine mod and just threw it together with the above timings and thrashed the fuck out of it 140M to a rally but runs out of puff at 8000rpm @76mph gps
I know its over 60 yrs old but I'd like get more out of it
My 125 1966 vespa has 27 rwhp so surely I can get more out of a 200, thi over square at 58x66
So what should I be doing in my man cave to get it singing a bit more? I'm also stud limited and single chef hat exhaust port

In germany there is a very good old scooter specific forum called german scooter forum (gsf)

If you ask your questions there even in english i am pretty sure you find specific help

But its always worth to stay here, listen what others do in the big 2 stroke world

https://www.germanscooterforum.de/

Grüße Wolfgang

[wobbly]

Grad, the R3 pipe /manifold/porting changes I worked on for a couple of months were sent of to Franko several months before the World Cup.
I heard nothing back - very unusual, then I received an email from the Flenghi brothers the day after the Cup finished, saying he was no longer at TM.
I got several spies on the job and found out he had gone to Lenzo.

Still no word from him at all - except a small pic of the new LKE Rev1 homologation stamp on Instagram.
He's now working in Mafia land big time, so should be very careful.
He has been beaten by independent tuners for some time now - maybe that is the root cause.

TM want me to sign an NDA , but I still have not seen any results from my new manifold or pipe testing.
They have agreed to pay me, thats some consolation, but being treated like a leper doesnt go down well - they simply ignor any conversation about what happened with Franco or the tests.
I do wonder if I designed the LKE pipe and didnt even know i did it.

[Flettner]

Grad, the R3 pipe /manifold/porting changes I worked on for a couple of months were sent of to Franko several months before the World Cup.
I heard nothing back - very unusual, then I received an email from the Flenghi brothers the day after the Cup finished, saying he was no longer at TM.
I got several spies on the job and found out he had gone to Lenzo.

Still no word from him at all - except a small pic of the new LKE Rev1 homologation stamp on Instagram.
He's now working in Mafia land big time, so should be very careful.
He has been beaten by independent tuners for some time now - maybe that is the root cause.

TM want me to sign an NDA , but I still have not seen any results from my new manifold or pipe testing.
They have agreed to pay me, thats some consolation, but being treated like a leper doesnt go down well - they simply ignor any conversation about what happened with Franco or the tests.
I do wonder if I designed the LKE pipe and didnt even know i did it.

Welcome to the club, at least you are getting paid.

[Frits Overmars]

... I received an email from the Flenghi brothers the day after the Cup finished, saying he was no longer at TM.
I got several spies on the job and found out he had gone to Lenzo. He's now working in Mafia land big time, so should be very careful.
I do wonder if I designed the LKE pipe and didnt even know i did it.

Been there, know the feeling. About 20 years ago my friend Roland Holzner, after designing the Maxter kart engine, got an offer he couldn't refuse from Lenzo. He flew me in as well. When things got less pleasant, Roland's laptop, with my software on it, was stolen from his apartment. When he tried to rapport the theft to the local police, he was told that he couldn't, because he was not the rightful tenant of that apartment. He was shown a document stating that the apartment was rented out to Lenzo. The ink on that document was still wet and why would Lenzo rent an apartment that he already owned?
During this episode I had a whole hotel in the village of Brolo, Sicily (where Franco Drudi is staying now) to myself, owned by Lenzo and occupied by just me, the hotel staff and the biggest cockroaches you ever saw.

In case you're interested in the technical side of things, we worked on a cylinder that may look kinda familiar now. But at the time the local experts told us that it could never work because the auxiliary exhaust ports were twice as large as they had ever tested. And there was also a hump in the exhaust duct floor that 'confused the flow'.
Nice detail in the picture below: notice the broken-off M6 tap, top left. Just think what could have happened if the machine saw blade had hit that tap a little more head-on...
Anyway it paints a nice picture of the work quality.

[Storbeck]

Been there, know the feeling. About 20 years ago my friend Roland Holzner, after designing the Maxter kart engine, got an offer he couldn't refuse from Lenzo. He flew me in as well. When things got less pleasant, Roland's laptop, with my software on it, was stolen from his apartment. When he tried to rapport the theft to the local police, he was told that he couldn't, because he was not the rightful tenant of that apartment. He was shown a document stating that the apartment was rented out to Lenzo. The ink on that document was still wet and why would Lenzo rent an apartment that he already owned?
During this episode I had a whole hotel in the village of Brolo, Sicily (where Franco Drudi is staying now) to myself, owned by Lenzo and occupied by just me, the hotel staff and the biggest cockroaches you ever saw.

In case you're interested in the technical side of things, we worked on a cylinder that may look kinda familiar now. But at the time the local experts told us that it could never work because the auxiliary exhaust ports were twice as large as they had ever tested. And there was also a hump in the exhaust duct floor that 'confused the flow'.
Nice detail in the picture below: notice the broken-off M6 tap, top left. Just think what could have happened if the machine saw blade had hit that tap a little more head-on...
Anyway it paints a nice picture of the work quality.

Bit of a tangent, but your comment about being told that the large auxiliary exhaust ports were too large reminds me of a thing I've long wondered about. I've seen several examples of cylinders with super tiny auxiliary exhaust ports. Always wondered why on earth they would bother to add auxiliary ports and then make them so small. My assumption is that there is something that can be done "wrong" with auxiliaries to make them have negative affects, the designers of those cylinders unknowingly did that, and ended up testing smaller and smaller auxiliaries until that negative affect went away. But I have no idea.