RcTek - Largescale Radio Controlled Model Car Engine Fuel/Air Mixture Settings

RcTek : Large Scale Car Engine Settings

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Technical Information


	To assist the large scale radio controlled model car racer in setting the air/fuel mixtures on their engines, we have the below information. The carburettor depicted here is the one from the Komatsu Zenoah G230RC engine, but carburettors from the other engine manufacturers share similar, if not the same, layout. These settings may also be of use to such as GoPed riders or anyone who uses these 22/23cc two stroke engines, but as different pipes and filter set-ups are used they will need separate consideration.

Section Contents

	Model Car Engines
	Engine Terminology
	Zenoah G230RC Dyno Results
	Zenoah Engines
	Dyno Information
	Blueprinted Engines
	Zenoah GoPed FAQ

The Carburettor Adjusters

The carburettor has three basic controls which are shown in the image below right.

H Needle

This screw controls the high speed mixture settings. Some carburettors have a T-bar to ease the adjusting process. (Top End Speed)

L Needle

This screw controls the low speed mixture. (Bottom End Speed)

Idle Screw

This screw, not surprisingly, controls the idle (tick over) speed of the engine.

Base Settings for Various Engines

Settings for various engines used in largescale model cars are shown below.

All settings are based upon the screws being turned fully in (not tightly).

Please Note: that these are base settings and you need to take into consideration climate and weather differences, as well as any tuning or tuned parts that have been fitted to the engine.

These engine settings are for guidance only and we do not accept any responsibility for any damage you do to your engine.

Komatsu Zenoah G230RC
H Needle	1 & 3/8 +/- 1/4 turns out
L Needle	1 & 1/4 +/- 1/4 turns out
Idle Screw
Notes	This is the factory set standard for the climate in Japan using the standard muffler and air filter.

Komatsu Zenoah G2D
H Needle	1 & 1/8 turns out
L Needle	1 & 1/4 turns out
Idle Screw	Turn the idle screw all the way in to just fully compress the spring and then back 2.5 turns.
Notes	These settings were kindly provided by the former UK Zenoah importer Rob Lochier of Alro Racing Systems.

Solo Engine Part One
Solo Engine with Samba 2, FirstOne & Lauterbacher 4 Chamber Pipes
H Needle	1 & 3/4 turns out
L Needle	1 & 1/4 turns out
Idle Screw	Approximately 3 turns out
Notes	These settings were provided by Ian Oddie of Oddified Motors

Solo Engine Part Two
Solo Engine with Most Other Pipes
H Needle	1 & 3/4 turns out
L Needle	1 turn out
Idle Screw	Approximately 4 to 5 turns out
Notes	These settings were provided by Ian Oddie of Oddified Motors

Summary

If you have any engine settings you are willing to submit or have any questions, please feel free to contact us.

Further Information

For help with the terms used throughout this series of pages, please see the Engine Terminology section.

If you have any comments or suggestions about this or any of the other R/C car content on the RcTek site, please feel free to ask them on our On-line Forum

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