Stupid Simple Small Engine Fuel Injection System: Difference between revisions
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*The stock Carburetor is kept as a [[Throttle Body]] | *The stock Carburetor is kept as a [[Throttle Body]] | ||
**Unless you want to remove that restriction and use a dedicated throttle body and [[Port Fuel Injection]] etc | **Unless you want to remove that restriction and use a dedicated throttle body and [[Port Fuel Injection]] etc | ||
***This also keeps the stock [[Governor (Small Engines) ]] + [[Governor Linkages]] in use | |||
*As per S6 Ep8 18:00 while it CAN run with it spraying gasoline ahead of the carburetor, this is less than ideal due to it pooling up etc | |||
*[[ASA (Plastic)]] is used | |||
=Components= | =Components= | ||
Latest revision as of 19:48, 5 April 2026
Basics
- S3 EFI
- An Electronic Fuel Injection System Developed by Robot Cantina (YouTube Channel) / Jimbo that is based off of the Bosch CIS System
- It is somewhat in-between a “dumb” Carburetor system, and a modern “smart” system like a Speeduino with tons of sensors / Dual Injection etc
- Low Complexity/Points of Failure, but just smart enough to work reliably is the design goal
- As per3:36 in the video,
- It DOESN’T HAVE:
- A Crankshaft Position Sensor
- A Throttle Position Sensor
- An Air Intake Temperature Sensor
- Oxygen Sensor
- This MAY be useful enough to add in in their opinion
- It DOES Have:
- A Manifold Absolute Pressure Sensor
- A Thermal Time Switch ( Thermal Fuse ? ) for Cold Start detection+adjustments
- A Delay Based Startup Enrichment
- The stock Carburetor is kept as a Throttle Body
- Unless you want to remove that restriction and use a dedicated throttle body and Port Fuel Injection etc
- This also keeps the stock Governor (Small Engines) + Governor Linkages in use
- Unless you want to remove that restriction and use a dedicated throttle body and Port Fuel Injection etc
- As per S6 Ep8 18:00 while it CAN run with it spraying gasoline ahead of the carburetor, this is less than ideal due to it pooling up etc
- ASA (Plastic) is used
Components
Fuel Tank
Fuel Pump
- An Amazon Listing for the Kohler EFI Fuel Pump Module ( ~57 USD as of this edit’’’ )
- As per 5:38 in the video, you are not supposed to gravity feed these pumps
- It needs a Diaphragm Pump based low pressure pump to go from fuel tank to it’s low pressure fuel inlet
Fuel Injector
- An Amazon Listing for “GY6 Clone” ( ‘’’~28 USD as of this edit’’’ )
- ” Perfect Fit: Designed as an OEM replacement, this RedCap fuel injector provides a precise fit for Jonway GTX 250, Cougar Cycle Clash Force 200 EFI, Gator 200-Tank, and other scooters or motorcycles with XMT 250 EFI GY6 168cc, 170cc, and 200cc engines, ensuring seamless integration and reliable performance.”
- Mentions EV1 Fuel Injector style wire connections?
Electronics
- Arduino Uno
- Relay for Fuel Pump
- SSR for the Fuel Injector
- Potentiometer/Hall Effect Knob for AFR Trim
- E-Stop
Internal Links
External Links
- A Video by the YouTube Channel “Robot Cantina” Titled “S6 Ep8 We build a simple fuel injection system for the 212cc Predator ( ‘’’~30 Minute Watch’’’ )
- Mentions the 212cc Predator Engine