fuelsettingshelp
Differences
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fuelsettingshelp [2009/03/09 07:05] twdorris |
fuelsettingshelp [2010/02/26 13:10] twdorris |
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| The **Global fuel** and **Deadtime** adjustments are intended to be used mainly to compensate for injectors and fuel pressure that differ from stock. They are applied at all times. | The **Global fuel** and **Deadtime** adjustments are intended to be used mainly to compensate for injectors and fuel pressure that differ from stock. They are applied at all times. | ||
| + | |||
| ==== Global fuel ==== | ==== Global fuel ==== | ||
| - | The stock ECU assumes that the car is equipped with 450 cc/min injectors and a fuel pressure of either 37 psi (1G) or 43.5 psi (2G). As injector size is increased, the Global fuel adjustment must be made more negative. Reducing the **Global fuel** adjustment value to, say, -50% to compensate for 900 cc/min injectors cuts fuel delivery in half. | + | The stock ECU assumes that the car is equipped with 450 cc/min injectors and a fuel pressure of either 37 psi (1G) or 42.6 psi (2G). As injector size is increased, the Global fuel adjustment must be made more negative. Reducing the **Global fuel** adjustment value to, say, -50% to compensate for 900 cc/min injectors cuts fuel delivery in half. |
| The needed Global fuel adjustment value may be calculated as follows: | The needed Global fuel adjustment value may be calculated as follows: | ||
| FlowRateAdj1G = squareroot(BaseFuelPressure / 37) | FlowRateAdj1G = squareroot(BaseFuelPressure / 37) | ||
| - | FlowRateAdj2G = squareroot(BaseFuelPressure / 43.5) | + | FlowRateAdj2G = squareroot(BaseFuelPressure / 42.6) |
| NewInjFlow = InjectorCCPerMin * FlowRateAdj | NewInjFlow = InjectorCCPerMin * FlowRateAdj | ||
| Adj = (100 * ( 450 / NewInjFlow ) ) - 100 | Adj = (100 * ( 450 / NewInjFlow ) ) - 100 | ||
fuelsettingshelp.txt · Last modified: 2024/03/15 11:16 (external edit)
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