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Dyno Tips

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The Dynojet 248 is the industry standard and the dyno choice of Speed Engineering.

Dynos can be very intimidating to some, and most people feel uncomfortable pointing there car at a wall and flooring it. We have created this section to give you an idea of what to expect from your dyno experience and maybe ease your mind a bit. A few things to keep in mind are that high quality 93 octane fuel is recommended for the best results. Also, cars that foul sparkplugs should have fresh plugs installed and a spare set especially if tuning nitrous.

1. Give Us a Call
It is very important that you schedule your dyno time at least a day before, a lot of time we have pre-existing projects or other people scheduled for the dyno. We will be glad to work with you on your schedule time. If you need to cancel or reschedule your dyno time please let us know.

2. Get To The Shop
Directions to the shop are located on the contact us page, we will be glad to help you find your way here over the phone if needed.

3. Getting Strapped Down
Once you arrive to the shop, provided that we have all other cars moved out of your way, you will be asked to pull your car in (backed in if front wheel drive) on the dyno rollers. Once placed on the rollers you are instructed to pull your emergency brake, put your car in gear, turn the ignition off , and pop your hood. We will then start to strap your car down and place wheel stops in front and behind of the non-moving wheels.
4. Getting Hooked Up
We will now attach the spark plug wire pick up and the ground wire, this enables us to get the RPM signal. If wide band O2 is chosen then we will also hook that up to the exhaust.

5. Get Rolling
At this point it is almost time to start your Dyno. We instruct you to get your car rolling at about 10-15 MPH, this will align your car on the rollers. We also now double check the straps to make sure they are good and tight.

6. Getting REAL Wheel Horsepower
At this time we are ready to make our first pull. Typically the owner drives the car on the dyno but if you would like we can do this for you. If your vehicle is equipped with Traction Control it must be turned off before the session begins. An ABS malfunction light is normal and will automatically go off once the vehicle is back on the road.

Manual Transmission Cars
Most cars will be tested in the 1:1 trans gear ratio, as this yields the best results. This is most always 4th gear. The test is performed at WOT from any beginning RPM to redline. Once each pull is over push in the clutch and place the trans in neutral. There will be no need to use the brakes. The dyno brakes will slow the wheels to a stop. 

Auto Transmission Cars
Most cars will be tested in the 1:1 transmission gear ratio, as this yields the best results. This is almost always 3rd gear. The pull will begin just above the MPH threshold where your vehicle down shifts to 2nd gear at WOT.

Find the RPM that you would like to start at and let us know when you are ready, at this point we will start sampling the data from the dyno as you go wide open throttle. The pull will last from this point until the engine reaches the RPM redline. Let off the Gas and place the car in neutral at the end of the pull to eliminate engine drag while the Dyno brakes slow the wheels to a stop. Make sure the wheels have stopped turning before placing the transmission in park.

7. Repeating The Process
For normal power test we recommend at least 3 pulls to determine a good base line. Most pulls will only last a few seconds and a typical 3 pull session will only take about 15-20 minutes on the dyno. If tuning is being done we recommend renting the dyno by the hour because of the amount of time that is needed.

8. When It's All Over
At the end of your session we will take a picture of your car on the dyno then commence to removing all the straps and stops along with the RPM pick up. We will email (or zip drive) you a digital dyno sheet including the picture of you car and the graph. You will then be asked to back or pull your car out of the dyno bay and the process is complete. 

It may sound like a lot but it is actually a very simple process.  Don't forget to wash your vehicle for the best photo results.

Thank you for visiting Speed Engineering and Dyno's Dyno Procedure and tips page. We hope this site will help to show you what we can offer for your late model car or truck. We offer many different services ranging from tune-ups to full performance engine builds. If you want the best service and tuning possible, then give us a call or send an e-mail. We will be more than happy to get you a quote on any part or talk with you about a full package. No matter what, Speed Engineering can meet your needs. Whether it is an aftermarket cold air intake, a Speed Engineering custom built 4" cat-back exhaust, a 400 RWHP bolt-on only X-Package, or a 427+ cubic inch blown monster. You have found the right place!

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