Dynojet 224 User manual

©2014-2018 Dynojet Research, Inc. All Rights Reserved.
Installation Guide for In Ground Model 224 Automotive Dynamometers.
This manual is copyrighted by Dynojet Research, Inc., hereafter referred to as Dynojet,
and all rights are reserved. This manual, and the software described in it, is furnished
under license and may only be used or copied in accordance with the terms of such license.
This manual is furnished for informational use only, is subject to change without notice,
and should not be construed as a commitment by Dynojet. Dynojet assumes no
responsibility or liability for any error or inaccuracies that may appear in this manual.
Except as permitted by such license, no part of this manual may be reproduced, stored in a
retrieval system, or transmitted, in any form or by any means, electronic, mechanical,
recording, or otherwise, without the prior written permission of Dynojet.
The Dynojet logo is a trademark of Dynojet Research, Inc.
Any trademarks, trade names, service marks, or service names owned or registered by any
other company and used in this guide are the property of their respective companies.
Dynojet Research, Inc., 2191 Mendenhall Drive, North Las Vegas, Nevada 89081, USA.
Printed in USA.
Part Number: 98200046 Version 3 (09/2018)
#
RECORD
Dynamometer Number:
#
RECORD
Eddy Current Brake Number:

i
In Ground Model 224 Automotive Dynamometer Installation Guide
T ABLE OF C ONTENTS
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Chapter 1 Specifications and Operating Requirements
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Conventions Used In This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Your Dyno Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Dynamometer Specifications and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Chassis Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Compressed Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Computer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Fire Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Forklift Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Grounding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Phone and Internet Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Tie-Down Straps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Tool Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Model 224xLC In Ground Automotive Dynamometer . . . . . . . . . . . . . . . . . . . . . 1-11
DynoWare RT Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Main Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Network Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Pit Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
224 Pit Requirements and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

In Ground Model 224 Automotive Dynamometer Installation Guide
ii
TABLE OF CONTENTS
In Ground Model 224 Automotive Dynamometer Installation Guide
ii
Chapter 2 Dyno Installation
Unpacking and Inspecting the Dyno . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Dyno Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Removing the Dyno from the Crate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Anchoring the Dyno . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Eddy Current Brake Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Cable Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Identifying the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Routing the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Aligning the Optical Pickup Card Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Pit Cover Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Ground Hook Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Chapter 3 Eddy Current Brake Installation
Eddy Current Brake Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Before Installing the Eddy Current Brake—Verify Optimal Brake Cooling . . . . . . 3-2
Before Installing the Eddy Current Brake—Verify The Mounting Holes . . . . . . . . 3-3
Unpacking the Eddy Current Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Installing the Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Installing the Bearing, Spline Shaft, and Driveline Assembly . . . . . . . . . . . . . . . . 3-8
Installing the Eddy Current Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Installing the Load Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Installing the Pit Cover Supports and Eddy Current Brake Driver . . . . . . . . . . . . 3-14
Securing the Brake to the Dyno Room Floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
Installing the Pit Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Load Cell Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Chapter 4 Basic Dyno Operation
Loading the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Connecting the RPM Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
RPM Pickup Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Connecting the Secondary Inductive Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Connecting the Primary Inductive Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Grounding the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Pre-Run Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Before Starting the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Engine Warm Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
After Engine Warm Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Making a Test Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Things to Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Verifying the SAAR Brake Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Maintaining the SAAR Brake Shoe Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

TABLE OF CONTENTS
iii
Version 3 In Ground Model 224 Automotive Dynamometer Installation Guide
Appendix A Red Head Anchor Installation
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Contact Information for ITW Ramset/Red Head . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Appendix B Power Requirements and Installation
North America, Japan, and Locations Using 60 Hz Power . . . . . . . . . . . . . . . . . B-2
Installing the Wall Receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Testing for Correct Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Hard Wiring to the Building . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Excluding North America and Japan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Installing the Wall Receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Testing for Correct Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Hard Wiring to the Building . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Appendix C Torque Values
Standard Bolt Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Grade 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Grade 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Metric Bolt Torque Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Grade 8.8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Grade 10.9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-i

v
In Ground Model 224 Automotive Dynamometer Installation Guide
W ARNINGS
Disclaimers
Dynojet Research, Inc. (Dynojet) makes no representation or warranties with respect to the contents
hereof and specifically disclaims any implied warranties of merchantability for any particular purpose.
Dynojet reserves the right to revise this publication and to make changes from time to time in the
content hereof without obligation of Dynojet to notify any person of such revision or changes.
Dynojet is not responsible for false operation due to unexpected dynamometer operation such as may
be caused by static, software bugs, hardware failure, etc.
Dynojet is not responsible for damage resulting from improper installation of the dynamometer or
from improper service rendered to the dynamometer. Dynojet is not responsible for damage incurred
due to alteration of the dynamometer or components, use of unapproved parts, or abuse to the
dynamometer.
Do not connect or disconnect cables or components on the dynamometer with the power on.
Always wear protective clothing, ear protection, and eye protection (goggles, safety glasses) when using
and servicing the dynamometer.
Equipment Power Requirements
The dynamometer has specific power requirements. Connecting the dynamometer to the incorrect
voltage will void the dynamometer warranty. Installation may require a licensed electrician.
Potentially Lethal Voltages
Components attached to and within the dynamometer operate with potentially lethal voltages. To
provide the greatest assurance of safety, the AC power cord(s) must be disconnected from the power
source before servicing electrical components or wiring. Disconnect all power cords before servicing
electrical components for the greatest assurance of safety.

In Ground Model 224 Automotive Dynamometer Installation Guide
vi
WARNINGS
Electrostatic Discharge Precautions
Electrostatic Discharge
Electrostatic Discharge (ESD), or static shock, can damage electronic components within the
dynamometer. The damage may occur at the time of an ESD occurrence, or the shock may degrade the
component, resulting in a premature component failure later. To avoid ESD damage, always practice
good ESD control precautions when servicing the dynamometer. Dynojet designs its dynamometers
to be very tolerant of static shocks by the users, but the electronics are vulnerable when the electronics
are exposed. ESD occurs as a result of a difference of potential between two objects when the two objects
touch. Damage occurs as a result of the energy released when the discharge (touch) occurs. The
difference of potential can accumulate by as simple an action as a user moving across carpet or a seat.
If that person’s energy is discharged directly to the electronics, the electronics can be damaged.
Precautions
To protect against ESD damage, you must eliminate the difference of potential before the electronics
are handled. Touch the chassis of the dynamometer before touching any of the electronics. By touching
the chassis, you discharge any static shocks to the chassis instead of to the electronics.
If you are holding a circuit board or dynamometer component in your hand when you approach the
machine, touch the chassis of the dynamometer with your hand before installing the circuit board or
component.
When handling a circuit board or component to someone, touch that person with your hand first, then
hand them the component.
Always carry circuit boards in anti-static bags when the boards are exposed (removed from the
dynamometer).
Battery Fire and Explosion Hazards
There is a danger of explosion if the battery is incorrectly replaced. Replace only with the same or
equivalent type recommended by the manufacturer. Discard used batteries according to the
manufacturer’s instructions.
Automotive Batteries
In operation, batteries generate and release flammable hydrogen gas. They must always be assumed
to contain this gas which, if ignited by burning cigarette, naked flame or spark, may cause battery
explosion with dispersion of casing fragments and corrosive liquid electrolyte. Carefully follow
manufacturer's instructions for installation and service. Keep away all sources of gas ignition and do
not allow metallic articles to simultaneously contact the negative and positive terminals of a battery.
Do not allow the positive and negative terminals to short-circuit. The dynamometer chassis is tied to
the negative side of the battery. Do not short between the positive battery terminal or the starter
connections to the chassis. In addition, make sure metal tools such as screw drivers, wrenches, and
torque wrenches do not come in contact with the negative and positive terminals of the battery. Short
circuiting the terminals of the battery can cause burn injuries, damage to the dynamometer, or trigger
explosions.
Charging
Batteries being charged will generate and release flammable hydrogen gas. Charging space should be
ventilated. Keep battery vent caps in position. Prohibit smoking and avoid creation of flames and sparks
nearby.
Wear protective clothing, eye and face protection, when charging or handling batteries.

vii
Version 3 In Ground Model 224 Automotive Dynamometer Installation Guide
WARNINGS
Grounding Requirements
Always ground the vehicle to the dynamometer. Never operate the dynamometer without properly
grounding the vehicle to the dynamometer.
Other Potential Hazards
The AC power outlet shall be installed near the equipment and it shall be easily accessible to allow for
disconnect before service.
The dynamometer should be located in a well ventilated area. There is a carbon monoxide hazard with
all internal combustion engines. Engine exhaust contains poisonous carbon monoxide gas. Breathing
it could cause death.
Any dynamometer room design must incorporate sufficient exhaust extraction.
Always wear proper ear and eye protection when operating the dynamometer.
Never operate the dynamometer with the covers removed.
Never stand behind the dynamometer when in operation.
Never operate the dynamometer when there is excessive vibration or noise. Resolve these problems
before proceeding.
Never fuel the vehicle on the dynamometer unless appropriate safety measures are taken.
Verify brake operation before beginning any dynamometer testing.
Verify the vehicle is properly secured to the dynamometer.
Verify the vehicle is properly grounded to the dynamometer.
Never operate the blowers without the guards installed.
Exercise care with any dynamometer testing; portions of the dynamometer and vehicle may become
hot.
As with any equipment using electricity and having moving parts, there are potential hazards. To use
this dynamometer safely, the operator should become familiar with the instructions for operation of
the dynamometer and always exercise care when using it.
Do not repair or replace any part of the dynamometer or attempt any servicing unless specifically
recommended in published user-repair instructions that you understand and have the skills to carry
out.

1-1
In Ground Model 224 Automotive Dynamometer Installation Guide
CHAPTER 1
S PECIFICATIONS AND O PERATING
R EQUIREMENTS
Thank you for purchasing Dynojet’s In Ground Model 224 Automotive Dynamometer
(dyno). Dynojet’s software and dynamometers will give you the power to get the
maximum performance out of vehicles you evaluate. Whether you are new to the
benefits of a chassis dynamometer or an experienced performance leader, the
repeatability and diagnostic tools of Power Core software and a Dynojet dynamometer
will give you the professional results you require.
This document provides instructions for installing the dyno. This document will walk
you through operating requirements, installation, and basic dyno operation. To
ensure safety and accuracy in the procedures, perform the procedures as they are
described.
Document Part Number: 98200046
Version 3
Last Updated: 09-07-2018
This chapter is divided into the following categories:
• Introduction, page 1-2
• Dyno Specifications and Requirements, page 1-5
• Model 224 In Ground Dynamometer, page 1-11
• DynoWare RT Electronics, page 1-12
• Pit Specifications, page 1-15

CHAPTER 1
Introduction
In Ground Model 224 Automotive Dynamometer Installation Guide
1-2
INTRODUCTION
Before installing your dyno, please take a moment to read this guide for installation
instructions, dyno features, and other important information.
This guide is designed to be a reference tool in your everyday work and includes the
following chapters and information:
SPECIFICATIONS AND OPERATING REQUIREMENTS
This chapter describes the requirements and specifications for the dyno.
DYNO INSTALLATION
This chapter describes the procedures for installing the dyno.
EDDY CURRENT BRAKE INSTALLATION
This chapter describes the procedures for installing the eddy current brake and load
cell. This chapter also includes the procedures for load cell calibration.
BASIC DYNO OPERATION
This chapter describes basic dyno operating procedures and maintenance.
RED HEAD INSTALLATION
This appendix describes the procedures for installing the Red Head anchors.
POWER REQUIREMENTS AND INSTALLATION
This appendix describes the power requirements and installation instructions for the
eddy current brake.
TORQUE VALUES
This appendix describes standard and metric torque values.

1-3
SPECIFICATIONS AND OPERATING REQUIREMENTS
Introduction
Version 3 In Ground Model 224 Automotive Dynamometer Installation Guide
CONVENTIONS USED INTHIS MANUAL
The conventions used in this manual are designed to protect both the user and the
equipment.
TECHNICAL SUPPORT
For assistance, please contact Dynojet Technical Support at 1-800-992-4993, or write
to Dynojet at 2191 Mendenhall Drive, North Las Vegas, NV 89081.
Visit us on the World Wide Web at www.dynojet.com and www.winpep.com where
Dynojet provides state of the art technical support, on-line shopping, and press
releases about our latest product lines. Try our remote support assistance or watch
one of our informative videos.
Access the electronic version of this guide along with additional accessory guides,
software guides, and the latest technical bulletins at www.dynojet.com/downloads.
example of convention description
The Caution icon indicates a potential hazard to the
dynamometer equipment. Follow all procedures
exactly as they are described and use care when
performing all procedures.
The Warning icon indicates potential harm to the
person performing a procedure and the dynamometer
equipment.
#
RECORD
The Record # icon reminds you to record your
dynamometer and eddy current brake (retarder)
serial number on the inside cover of this manual.
Bold Highlights items you can select in the software
interface, including buttons and menus.
> The arrow indicates a menu choice. For example,
“select File >Open” means “select the File menu,
then select the Open choice on the File menu.”
Blue Highlights items you can click on directing you to a
location with additional information (electronic
version).

CHAPTER 1
Introduction
In Ground Model 224 Automotive Dynamometer Installation Guide
1-4
YOUR DYNO ROOM
This section is not meant to imply that a dyno room is essential to repeatable results
on a Dynojet dynamometer. However, a dyno room with an engine cooling intake fan,
exhaust extraction, and noise reduction capabilities can add a new dimension to your
shop.
A proper dyno room design will help to ensure repeatable, accurate runs. A good dyno
room should do the following:
• minimize noise
• provide a controlled environment for testing
• provide a view window (safety glass) for customers
• be designed with safety in mind
Intake Air Fan—After building your dyno room, you will need to supply an intake air
fan. The intake air fan supplies air to cool the vehicle’s engine while supplying fresh
oxygen for you and your vehicle to breathe. It is a common misconception that you
cannot tune a vehicle without a large fan simulating exact road conditions; however, a
good cooling fan is the only requirement for consistent diagnostics and tuning. The
dyno room requires a minimum of seven (7) air changes per minute (CFM). Use the
formula Room Volume × Air Changes Per Minute = CFM to calculate the CFM needed
for your dyno room. For example, if your room is 10 x 10 x 10 (room volume 
is L×W×H), then 1000 × 7 = 7000 CFM. The CFM value is room size dependent.
Equalizer Box—If the air flow rate coming into the dyno room is greater than the air
flow rate leaving the dyno room, the room will become pressurized. A pressurized
dyno room will make measured power misleading. To compensate, you need an
equalizer box. The equalizer box is a baffled (to reduce noise) vent to the outside of
your dyno room. The size of the equalizer box is dependent on the size of your dyno
room and the size of your fans.
Exhaust Extraction—An exhaust fan is needed to remove exhaust gasses, especially
carbon monoxide, from the dyno room. Carbon monoxide is potentially lethal to
people if not removed from the room and will affect engine power when mixed with
fresh air.
Engine exhaust contains poisonous carbon monoxide gas. Breathing it
could cause death. Operate machine in well ventilated area.
Fire Suppression—Always have adequate fire suppression or fire extinguishers in your
dyno room.
Industrial Noise Control, Inc.?Industrial Noise Control, Inc. offers a zinc-coated steel
room custom built to your specifications. This room meets all dyno room
requirements. The dyno room must be clean and dry with a comfortable room air
temperature above 32 degrees Fahrenheit (0 degrees Celsius), and have some system
of exhaust extraction.

1-5
SPECIFICATIONS AND OPERATING REQUIREMENTS
Dynamometer Specifications and Requirements
Version 3 In Ground Model 224 Automotive Dynamometer Installation Guide
DYNAMOMETER SPECIFICATIONS AND REQUIREMENTS
The following specifications and requirements will help you set up your dyno area and
verify you have the requirements necessary to operate your dyno safely. For more
information about dyno room setup and layout, refer to the Pre-Installation 
Guide P/N 98200083.
CHASSIS SPECIFICATIONS
description specifications
Length
of frame 74.00 cm (29.00 in.)
including feet 90.00 cm (35.25 in.)
including brake 97.00 cm (38.00 in.)
pit covers 145.00 cm (57.00 in.)
Height
to top of frame 58.50 cm (23.00 in.)
Width
of frame 218.50 cm (86.00 in.)
of frame with eddy current brake 321.00 cm (126.50 in.)
of pit covers, frame 279.50 cm (110.00 in.)
of pit covers, frame and eddy current brake 381.00 cm (150.00 in.)
Weight
224 dyno/crated dyno 1,588 kg (3,500 pounds)/ 1,905 kg (4,200 pounds)
Drum
diameter 61.00 cm (24.00 in.)
width 206.00 cm (81.00 in.)
Frame structural steel channel and angle
Maximum Speed 322 KPH (200 MPH)
Maximum Axle Weight 1,361 kg (3,000 pounds)
Remote Switches remote software control

CHAPTER 1
Dynamometer Specifications and Requirements
In Ground Model 224 Automotive Dynamometer Installation Guide
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Figure 1-1: Model 224xLC In Ground Dyno Dimensions

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SPECIFICATIONS AND OPERATING REQUIREMENTS
Dynamometer Specifications and Requirements
Version 3 In Ground Model 224 Automotive Dynamometer Installation Guide
Figure 1-2: Model 224xLC In Ground Dyno with Pit Covers Dimensions

CHAPTER 1
Dynamometer Specifications and Requirements
In Ground Model 224 Automotive Dynamometer Installation Guide
1-8
COMPRESSED AIR
You will need to provide an air hose nipple (1/4-inch NPT) to connect your clean, dry
shop air supply (100-140 psi) to the dyno.
The following requirements are needed for the air brake:
•airdryer
• shut off valve
• gauge on the regulator
• 1/4-inch NPT pipe thread connector (to attach air to the dyno)
The following requirements are needed for the optional Air Fuel Ratio (AFR) module:
• Clean and dry air, 100 psi regulated (690 kpa), 5 CFM (.014 m3/min) or better flow
• 1/4-inch NPT pipe thread compressed air connector
• optional air regulator
COMPUTER SPECIFICATIONS
You will need to provide a computer system to run the Power Core software. Refer to
www.dynojet.com for the latest computer requirements.
description minimum specifications recommended specifications
Operating System Windows 7 or later Windows 7 or later
Processor Dual Core Processor, 
2GHz or faster
Intel Core i5 2.8GHz or faster
Memory 4GB System Ram 8GB System Ram or more
Hard Drive 100GB or larger
(54MB required for program)
500GB or larger
(54MB required for program)
Monitor/Graphics Card 1280x1024 (SXGA) resolution or
higher
1600x900 resolution or higher
Network Adapter 1 free 10/100 Mbps
RJ45 Ethernet Port
1 free 100Mbps RJ45 Port or Wireless
External Media CD-Rom Drive CD-Rom Drive
Printer Printer, if prints are needed Color printer, if prints are needed

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SPECIFICATIONS AND OPERATING REQUIREMENTS
Dynamometer Specifications and Requirements
Version 3 In Ground Model 224 Automotive Dynamometer Installation Guide
ELECTRICAL REQUIREMENTS
The eddy current braking power source require user supplied grounded electrical
outlets with over current and short-circuit protection. These must be accessible to the
operator to be used as a disconnect.
ENVIRONMENTAL REQUIREMENTS
FIRE SUPPRESSION
Always have adequate fire suppression or fire extinguishers in your dyno room.
FORKLIFT REQUIREMENTS
You will need to provide equipment capable of lifting a minimum of 2,722 kg. 
(6,000 lb.) to lift the dyno off the crate and into position in your dyno room. You will
also need a pair of straps capable of supporting the uncrated dyno. Dynojet
recommends using single loop style straps. Use an approved strap lifting attachment
for the forklift to prevent strap slippage. Using lift straps with bare forks is not OSHA
compliant.
GROUNDING REQUIREMENTS
You will need to ground the vehicle to the dyn0 before every run using the vehicle
grounding kit P/N 76100015. Never operate the dyn0 without first grounding the vehicle
to the dyn0. Refer to “Grounding the Vehicle” on page 4-8.
Never operate the dyno without properly grounding the vehicle to the
dyno.
description specifications
Power Requirements: 4WD electronics 100-240 VAC, 50/60 Hz
Power Requirements: dyno electronics 100-240 VAC, 50/60 Hz
Power Requirements: AFR 100-240 VAC, 50/60 Hz
Power Requirements: computer Per computer manufacturer specifications
Power Requirements: optional eddy
current brake
240v 30amp single phase circuit for each eddy current
brake
Refer to Appendix B for more information.
description specifications
Temperature
operating min./max 10°C/50°C (50°F/122°F)
storage min./max 0°C/70°C (32°F/158°F)
Humidity 0 to 95% non-condensing

CHAPTER 1
Dynamometer Specifications and Requirements
In Ground Model 224 Automotive Dynamometer Installation Guide
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PHONE AND INTERNET ACCESS
Dynojet recommends you have a phone close to the dyno to call for assistance in an
emergency. You may also wish to contact Dynojet to troubleshoot your dyno.
Internet access on your computer is desirable for contacting Dynojet and downloading
new information and updates.
TIE-DOWN STRAPS
Dynojet recommends using tie-down straps for securing the car on the dyno. The dyno
comes with an automotive tie-down package.
TOOL REQUIREMENTS
You will need to provide a drill and drill bit capable of drilling holes in concrete. Refer
to Appendix A for more information on installing Red Head Anchors.
•drillbitsize:½-inch
• minimum hole depth: 1 ⅝-inch (41.2 mm)