Turbocharging carbureted petrol 2 stroke engines

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Turbocharging a carbureted two-stroke petrol engine is theoretically possible, but it presents significant challenges. Key concerns include managing oil delivery to the turbo bearings, maintaining appropriate crankcase pressure, and addressing spark timing without EFI. While a draw-through setup may work, it requires precise tuning and may result in inefficiencies due to fuel loss and back pressure. The discussion highlights the need for careful design of piping and consideration of compression ratios to avoid pre-ignition issues. Overall, while there are examples of successful turbocharged two-stroke engines, achieving reliable performance will likely require extensive testing and experimentation.
  • #121
bluechipx said:
I guess a visit is out then!
You are welcome to visit me, but I will not be visiting you.
Most people who come here do not want to leave.
 
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  • #122
Baluncore said:
It is a single-shaft, gas turbine engine, with a hybrid combustor.
Air is compressed, then fuel is added,
that mix passes into a cyclic cylinder combustor, with spark-ignition,
energy is extracted by the piston, to the crankshaft and flywheel,
the exhaust drives the turbine, which is on the compressor shaft.
you talk about the second video ive posted correct?
 
  • #123
Sorry for the very childish graphics, LOL. Here's the drawing I was talking about earlier.

turbo-2-stroke-can-it-work-2stroke-turbochargerd.webp


The final question is:
in this setup, EXACTLY as shown in the drawing, without making any further modifications (except proper carburetion), and especially with no kind of intake valve (just a basic two-stroke engine), can it produce more horsepower compared to the same engine without a turbo?

(please read the specific texts in the drawing before and consider if turbocharger can really act like an ''equalizer'')

YES why?

NOT why?
 
  • #124
As a parallel to the spark-ignition, two-stroke hybrid engine, there is a fuel injected, two-stroke diesel hybrid.

The Napier Nomad, was a 12 cylinder two-stroke hybrid diesel, built and tested in the late 1940s. In that engine, a compressor and turbine surround the two-stroke piston engine. Without valves, the air inlet and exhaust ports were holes in the cylinder walls, covered and uncovered by the pistons.

https://en.wikipedia.org/wiki/Napier_Nomad
Nomad-2.webp



 

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