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Preparing For Your Dyno Appointment

Getting ready for your dyno appointment is extremely important, and extremely valuable. Right now you have the opportunity to get your ducks in a row and potentially save yourself hundreds of dollars. I hope this guide gives you an idea of what you need to prepare before your dyno appointment. Please accept responsibility if you need to come back for another appointment because you have failed to follow the guide below. Please click HERE to download a PDF copy of our pre-dyno session checklist that will help ensure you are totally ready for your appointment.

Generally speaking, the more modified the car, the more preparation and spares will be needed at the dyno session. For those of you with heavily built cars: a general rule of thumb, anything that has ever been a problem with your car will show up on the dyno. Bring spares. Anywhere you’ve cut corners, will be a problem. Fix it beforehand.

This guide is not meant to intimidate. Any car that can successfully drive full throttle down the road will not have a problem on the dyno. Problems usually only occur on new builds that have not yet been tested – as the dyno is the first test, naturally any issues show up. One of my specialties is reviewing complicated builds and I HIGHLY recommend some level of consult before your dyno session for extensively modified vehicles.

Download Your Vehicle Specification Sheet HERE
Download Your Pre-Dyno Session Checklist HERE


The Basics:

  • Bring your wheel lock key. The Dynapack is a unique dyno that bolts to the hubs of the vehicle. Bring your wheel lock key. Advise us if your lug nuts are an abnormal thread pitch (we stock M12x1.5 and M12x1.25).
  • Thoroughly fill out the vehicle specification sheet and send it in 48 hours before your appointment. This will allow adequate time to review and look for potential red flags that need to be addressed or discussed prior to the appointment.
  • Ensure the vehicle has the same type of fuel you will be running, and that the vehicle has a full tank.
  • Ensure all fluids are at the correct level (engine oil, coolant, gear lubricants)
  • Ensure there are NO fluid leaks of any kind. This includes exhaust leaks.
  • Ensure the coolant is entirely bled and radiator fans are working. If radiator fans are operated by a switch, be sure to tell the dyno operator that the fans are NOT automatic.
  • Ensure the drivetrain is in good condition, including wheel bearings, suspension and related components.
  • If any sensors are faulty or not working, repair or replace them prior to your appointment.
  • If your vehicle is wide-body or has wide side skirts, be sure to let us know beforehand so that we can ensure we have large enough spacers to fit the dyno pods. Minimum clearance dimensions available upon request if you’re unsure.
  • Prepare the port for our wideband O2 sensor. If you have a spare bung, remove the plug and ensure the threads are not damaged, and lightly tighten the plug back in. If we are removing an existing sensor, remove it and re-install it gently. Remember, you are paying to install the sensor, make it easy for us! If you have a catalytic converter, the O2 sensor MUST be installed before the cat (closer to the engine).
  • Know the gear ratio of your 1:1 gear, or the closest gear to it. Know your final drive ratio. These figures are needed to calculate RPM of the engine in the event that our RPM trigger has difficulty picking up the RPM value.


For Forced Induction Vehicles:

  • Perform a boost leak test and fix all leaks prior to your appointment. Boost control tuning and in some cases fuel tuning will NOT be accurate if performed with a boost leak. No one thinks they have a boost leak, everyone always does. Email if you would like to purchase a boost leak tester, they are cheap and everyone that has one finds them extremely valuble!
  • Ensure fuel pressure is set, locked and recorded. Fuel pressure should be referenced with the engine off, fuel pump running continuously, and again at idle.
  • All vacuum and boost hoses must be ziptied or secured at their ends. Any hoses that are suspect to chafing or wear should be re-routed or replaced prior to the appointment.
  • Ensure boost control and wastegate correctly plumbed. If in doubt, ASK!
  • Ensure turbo and exhaust components are tight and properly fastened. I highly suggest the use of stainless or Inconel hardware and safety wire for all bolted components. Stainless hardware can be purchased from HD supply and safety wire and tools can be purchased from Aircraft Spruce.
  • Ensure your ignition and fuel system can support the amount of boost you’re planning to run. If ignition is suspect carry spare parts: spark plugs, ignitors, coils. This will help diagnose any issues.


For Standalone Computers / New Standalone Installations:

  • Have a way to measure ignition timing on the vehicle so that it can be confirmed during your appointment. We have a timing light but ensuring the timing mark is visible, or a mark has been created is required.
  • I highly recommend a consultation visit prior to the dyno appointment to verify all sensors and to get the vehicle up and running. It is a waste of your money to come to the dyno just to realize you have to pack up and go home because of a couple of minor issues. Almost every time with a new standalone installation we see clients with one or two small issues that MUST be resolved before a proper tune may take place. You can either do this on your time, or while paying for the dyno rental. It’s your decision!
  • If the vehicle has been previously tuned, ensure that you have a copy of the map that is in the ECU and that the computer is not locked. Re-mapping the entire engine from scratch will be more expensive than repairing or editing an existing map (usually).
  • Ensure all wiring is neat, tidy, properly grounded and protected from heat. There is an extremely distinguishable correlation between vehicle reliability and electrical cleanliness. Maybe it’s an insight to the workmanship of the entire vehicle!

Remember, we are here to help. Please ensure the vehicle is 100% complete and ready before your appointment. Bringing a rushed vehicle will be a waste of your time and money, and I can almost guarantee a re-tune will be required. These vehicles also do not help our reputation, as some customers have a funny way of blaming others when things go wrong. Although some shops would gladly take your money twice, I want you (the customer) to be happy. Tuning your car twice won’t make you happy. So for that reason I won’t tune your car unless I am confident it will be problem free.

Thank you for considering OnPoint,

Sasha Anis
Founder of OnPoint Dyno Ltd.


Book your dyno appointment HERE

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