SNAKE OBD1 EMU SOFTWARE: Difference between revisions
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This tab contains settings relating to the injector size. | This tab contains settings relating to the injector size. | ||
=== Injector Size === | === Injector Size === | ||
[[File:Fueltrim-injectors.jpg|frame]] | [[File:Fueltrim-injectors.jpg|frame|Injector Size]] | ||
Changing the injector size will automatically compensate the fuel tables for the rating of the injector (but not for the specific characteristics of the injector). Also the cranking fuel and throttle tip in fuel are compensated based on the injector size. Most stock Honda B & H series engines use 240 cc/minute injectors; most F & H series engines use 310 cc/minute injectors. For non-standard fuel pressure use the overall fuel trim to compensate. | Changing the injector size will automatically compensate the fuel tables for the rating of the injector (but not for the specific characteristics of the injector). Also the cranking fuel and throttle tip in fuel are compensated based on the injector size. Most stock Honda B & H series engines use 240 cc/minute injectors; most F & H series engines use 310 cc/minute injectors. For non-standard fuel pressure use the overall fuel trim to compensate. | ||
Injectors have a minimum pulse width before any fuel is injected, known as the injector 'dead time'. This varies by voltage and may be adjusted for different injector characteristics | Injectors have a minimum pulse width before any fuel is injected, known as the injector 'dead time'. This varies by voltage and may be adjusted for different injector characteristics | ||
Changing the injector size will automatically compensate the fuel tables for the rating of the injector (but not for the specific characteristics of the injector). Also the cranking fuel and throttle tip in fuel are compensated based on the injector size. Most stock Honda B & H series engines use 240 cc/minute injectors; most F & H series engines use 310 cc/minute injectors. For non-standard fuel pressure use the overall fuel trim to compensate. | |||
=== Fuel Trim === | |||
The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. | |||
Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero. | |||
[[File:Cranking-fuel.jpg|frame|Fuel Trim]] | |||
=== Fuel Trim === | Throttle tip in trim - applied to the throttle top in extra fuel, which is added when the throttle is rapidly opened. As with the cranking fuel trim, the throttle tip in fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the throttle tip in fuel. | ||
=== Cylinder Fuel Trim === | |||
The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. | The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. | ||
Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero. | Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero. | ||
[[File:Fueltrim-calc.jpg|frame|Cylinder File Trim]] | |||
Throttle tip in trim - applied to the throttle top in extra fuel, which is added when the throttle is rapidly opened. As with the cranking fuel trim, the throttle tip in fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the throttle tip in fuel. | Throttle tip in trim - applied to the throttle top in extra fuel, which is added when the throttle is rapidly opened. As with the cranking fuel trim, the throttle tip in fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the throttle tip in fuel. | ||
The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. | |||
Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero. | |||
=== Cylinder Fuel Trim 2 === | |||
[[File:Fueltrim-cylinder.jpg|frame|Cylinder Fuel Trim 2]] | |||
By changing the cylinder fuel trim it is possible to add or remove fuel for individual cylinders. Note that the injector duration as datalogged is the duration for injector #1. Changing the fuel trim for cylinder #1 will result in the datalogging showing the duration for cylinder #1, not the rest of the cylinders. Warning: Do not set the cylinder fuel trim from reading the spark plugs. The only reliable way to set the fuelling for individual cylinders is using EGTs or individual lambda probes on each exhaust runner. | |||
== Full Throttle Shift Parameters == | |||
This tab contains settings relating to the fuel trim of the engine. | |||
== Launch == | |||
This tab contains settings relating to the fuel trim of the engine. | |||
[[Category:SNAKE_OBD1_EMU]] | [[Category:SNAKE_OBD1_EMU]] | ||
Latest revision as of 06:25, 2 February 2023
OVERVIEW
The SNAKE OBD1 EMU v2 has the following additions to the s300 v2:
- RS232 interface (AiM dash output)
- CAN interface.
- Flex Fuel direct sensor digital input.
- Advanced engine protection.
- Bluetooth datalogging & control.
Fuel Injector Parameters
This tab contains settings relating to the injector size.
Injector Size
Changing the injector size will automatically compensate the fuel tables for the rating of the injector (but not for the specific characteristics of the injector). Also the cranking fuel and throttle tip in fuel are compensated based on the injector size. Most stock Honda B & H series engines use 240 cc/minute injectors; most F & H series engines use 310 cc/minute injectors. For non-standard fuel pressure use the overall fuel trim to compensate. Injectors have a minimum pulse width before any fuel is injected, known as the injector 'dead time'. This varies by voltage and may be adjusted for different injector characteristics Changing the injector size will automatically compensate the fuel tables for the rating of the injector (but not for the specific characteristics of the injector). Also the cranking fuel and throttle tip in fuel are compensated based on the injector size. Most stock Honda B & H series engines use 240 cc/minute injectors; most F & H series engines use 310 cc/minute injectors. For non-standard fuel pressure use the overall fuel trim to compensate.
Fuel Trim
The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero.
Throttle tip in trim - applied to the throttle top in extra fuel, which is added when the throttle is rapidly opened. As with the cranking fuel trim, the throttle tip in fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the throttle tip in fuel.
Cylinder Fuel Trim
The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero.
Throttle tip in trim - applied to the throttle top in extra fuel, which is added when the throttle is rapidly opened. As with the cranking fuel trim, the throttle tip in fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the throttle tip in fuel. The 'Calc' button enables the overall fuel trim to be calculated from changes in fuel pressure or engine displacement. Cranking fuel trim - applied when starting the engine. Note that the cranking fuel is automatically compensated for the injector size, but the overall fuel trim is not applied to the cranking fuel. Usually the cranking fuel can be left at zero.
Cylinder Fuel Trim 2
By changing the cylinder fuel trim it is possible to add or remove fuel for individual cylinders. Note that the injector duration as datalogged is the duration for injector #1. Changing the fuel trim for cylinder #1 will result in the datalogging showing the duration for cylinder #1, not the rest of the cylinders. Warning: Do not set the cylinder fuel trim from reading the spark plugs. The only reliable way to set the fuelling for individual cylinders is using EGTs or individual lambda probes on each exhaust runner.
Full Throttle Shift Parameters
This tab contains settings relating to the fuel trim of the engine.
Launch
This tab contains settings relating to the fuel trim of the engine.
