|
|
The ID725 exists for all those applications where the ID1000 is just a little bit too big. The ID725 will maintain strict linearity at flow rates that will satisfy idle and cruise requirements for even the smallest engines. This makes the ID725 ideal for emissions compliant OEM applications while offering the high flow rates required for mildly boosted motors. With pressure capability in excess of 8 bar this injector has found a home in many different applications. From upgrade injectors on V8's running factory Ford or GM ECU's, to OEM supply on everything from emissions legal turbo kits to Noble's new 650hp M600, the ID725 is holding its own with the ID1000 and ID2000 which have achieved near cult status in the aftermarket tuning industry. Follow the shortcut links below for specific data, or scroll down to see all data for the ID725.
Basic Specifications
Nominal Flow Rate - 715cc/min @ 3.00 Bar (43.5 psi) Using Gasoline at 52 Degrees C (125 Degrees F)
Explanation of Dynamic Flow Graphs
The critical dynamic flow characteristics of an injector can be described with three basic graphs. These are Uncorrected Flow vs. Actual Pulsewidth,
Corrected Flow vs. Effective Pulsewidth, and Linearity Deviation vs. Actual Pulsewidth.
Effective Pulsewidth is the final pulsewidth calculated by the ECU prior to the addition of the dead time compensation.
Actual Pulsewidth is the pulsewidth delivered to the injector and is the sum of the effective pulsewidth and the injector dead time compensation.
Uncorrected Flow vs. Actual Pulsewidth - This graph shows the dynamic flow vs. actual pulsewidth across the voltage range. The Y Axis is flow in
units of cubic centimeters per minute. The X Axis is actual pulsewidth in units of milliseconds.
All dynamic flow characteristics are generated from this raw data which clearly illustrates the non linearities and voltage sensitivity of the injector.
Corrected Flow vs. Effective Pulsewidth - This graph shows the dynamic flow vs. effective pulsewidth across the voltage range. The Y Axis is
flow in units of cubic centimeters per minute. The X Axis is effective pulsewidth in units of milliseconds.
This curve represents the response of the injector with proper dead time compensation, and at the end of the day this is the one that really matters.
Linearity Deviation vs Actual Pulsewidth - This graph shows the deviation from linearity (Straight Line Response) across the pulsewidth range.
The Y Axis is flow deviation in percent. The X Axis is actual pulsewidth in units of milliseconds.
All tests are performed at 100hz using a Motec M800 ECU. It should be noted that even though 10 milliseconds represents
static flow, the Motec drive circuit requires that the injector be turned off for at least .5msec per cycle which limits the actual duty cycle to 95% at
100Hz.
This is clearly illustrated by the flat response of the curve above 9.5 msec. 
Dynamic Flow Characteristics - 4.14 Bar (60
psi)
Dynamic Flow Characteristics - 5.52 Bar (80
psi)
Dynamic Flow Characteristics - 6.90 Bar (100
psi)
Maximum Linear Duty Cycle
The Maximum Linear Duty Cycle Graph shows the maximum duty cycle that can be achieved while still maintaining linear output. Note that this value is both RPM and firing arrangement dependant.
This graph applies to all Injector Dynamics Injectors.
Pressure Sensitivity Curves
The pressure sensitivity graph below shows the dynamic flow increase vs. pressure using 3 bar as the reference. The tests were performed at 14 volts
with a 5 millisecond pulsewidth, and clearly show the effect of increased dead time on dynamic flow. The theoretical flow increase is plotted as a point of
reference.
Dynamic Flow Rate and Dead Time Summary
Dynamic flow rate and dead time values across the voltage and pressure range.
This data is also available in the format required for Ford Factory ECU's (Hi Slope, Low Slope, Offset, Multipliers, etc) GM Factory ECU's (3D Offset, Low
Pulse Adders, etc.) and is available for donwload on our Application Data page.
Standard Fitments
Most applications fall into one of four standard fitments consisting of two standard lengths, (48mm or 60mm) and 2 standard fuel rail bores (11mm, or 14mm)
The 3D models pictured below give the relevant dimensions of these standard fitments.
Application specific fitments are also available and are listed on the order page.
|
| © Copyright 2009 Yaw Power Products. All rights reserved |