Fuel Mass to PW Conversion

From SCT SRT Wiki

Under Section: Fuel Injector

Name: Fuel Mass to PW Conversion NOTE: When altering this table, it is advised to alter Convert PW to Fuel Mass along with it

Description: Converts Fuel Mass into Injector Pulsewidth

Values: Cyl. Charge to Injector Pulsewidth based in microseconds

Use: To allow the tuner to tune in a bigger or smaller injector size.

Directions:

1. Calculate the flow of your new injectors for 58psi. Most aftermarket injectors are rated at 43psi. This is done by taking the square root of the new pressure divided by the old pressure and then multiplying by the original flow rate.
2. Divide the new injector's new flow rate by the stock injector's flow rate to achieve a ratio.
3. Multiply all values in the "mg/charge/cylinder" by this ratio.
4. Make sure that both tables are updated.

Example:

1. 650cc injectors are rated at 43psi. At 58psi, they flow 754cc. (sqrt(58/43))*650
2. 754/577= 1.30676
3. multiply all values by 1.30676

Here is a calculator that will aid in this conversion for you: [Fuel Conversion Calculator:http://www.rearsync.com/calc/fuel_cal.php]

Common Injectors Sizes:

03 SRT-4 Stock Injectors -- 527 cc -- Rated @ 58 psi

03 SRT-4 'Stage1 Injectors' -- 577 cc -- Rated @ 58 psi

04 SRT-4 Stock Injectors -- 577 cc -- Rated @ 58 psi

04-05 SRT-4 Stage 2 Injectors -- 682 cc -- Rated @ 58 psi

04-05 SRT-4 Stage 3 Injectors -- 682 cc -- Rated @ 58 psi

RC 650cc Injectors -- 650 cc - Rated @ 43.5 psi

RC 750cc Injectors -- 750 cc - Rated @ 43.5 psi

Related Tables:

Convert PW to Fuel Mass

Changing Fuel Injectors

Screenshot:

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