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