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The ID850 was added to the Injector Dynamics lineup to fill the need for a high flow injector in a small package. Specifically, GM's LS motors, and various motorcycles applications such as Suzuki's GSX's, and Kawasaki's ZX machines. With linearity matching that of the ID1000, and broad fitment options due to its small size, the ID850 is our most versatile injector. Most notable is the fact that the ID850 is the only direct fit high flow injector available for GM LS3, LS7, L76, L92, and L99 motors that comes with complete characterization tables for GM PCM tuning. That means easy and accurate tuning, for a better calibration with less time invested. Note: For a description of how the GM Injector data is generated and used by the PCM, check out our short technical article on the subject. Follow the shortcut links below for specific data, or scroll down to see all data for the ID850.
Basic Specifications
Nominal Flow Rate - 885cc/min @ 3.0 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 Bar (58.0
psi)
Dynamic Flow Characteristics - 5 Bar (72.5
psi)
Dynamic Flow Characteristics - 6 Bar (87.0
psi)
Dynamic Flow Characteristics - 7 Bar (101.5
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.
Spray Pattern
Five millisecond pulsewidth shown at 1/100th speed.
Standard Fitments
The ID850 used in its intended application in GM LS3, LS7, L76, L92, and L99 motors will require no adapters and is a direct fit as supplied.
Motorcycle applciations have specific fitment requirements that are not shown here, but are available upon ordering.
The ID850 can also be adapted to all other standard fitments as described and pictured below.
These standard fitments consist 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.
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