Turbocharging carbureted petrol 2 stroke engines

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SUMMARY

Turbocharging carbureted two-stroke petrol engines is feasible, as discussed in the forum, particularly with examples like the Motori-Minarelli AM6 engine. Key considerations include managing oil delivery to the turbo bearings, as two-stroke engines lack the high-pressure oil systems found in four-strokes. The turbo's compressor side can create back pressure that may enhance power, but it also risks significant fuel loss through the exhaust. Effective implementation requires careful tuning of exhaust and intake systems, and the potential for increased horsepower must be weighed against efficiency losses and the complexity of the setup.

PREREQUISITES
  • Understanding of two-stroke engine mechanics
  • Familiarity with turbocharging principles
  • Knowledge of carbureted fuel systems
  • Experience with exhaust tuning and back pressure management
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  • Research turbocharging techniques for two-stroke engines
  • Learn about oil delivery systems for turbo applications
  • Investigate exhaust tuning methods to optimize back pressure
  • Explore the differences between turbochargers and superchargers for two-stroke engines
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Engine builders, motorcycle enthusiasts, and automotive engineers interested in enhancing the performance of carbureted two-stroke petrol engines through turbocharging techniques.

  • #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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