• Mon-Fri 8-5

PERFORMANCE & TUNING

JM Automotive is the fastest growing Subaru performance shop in Minnesota. We sell and install performance parts, do full engine overhauls, performance builds, and offer tuning to go with it!

Our full-time tuner Devin has been tuning Subarus and all makes for a number of years and has experience with both open source and AccessPort tuning. For more information on tuning, you can call us at 763-316-5882.

There are a lot a details on this page about tuning and modifying your car; before doing so, please read all of the information provided.

We tune with the following programs:

  • Cobb Accessport (Subaru, Mitsubishi Evo X, Ford Ecoboost)
  • Opensource/ECU flash (Subaru and Mitsubishi)
  • Openflash tablet (BRZ and FRS)
  • Megasquirt
  • Hydra EMS
  • AEM EMS
  • Haltech
  • Motorsports Electronics

If you have a different tuning software call and see if we can help you out with it.

Note: A Cobb Accessport is require for tuning the following vehicles: 15+ Subaru WRXs/STIs, 14+ Subaru Forester XTs, all Ford Eco-Boost, 08+ Mitsubishi Evolutions.

We have a Dyno Dynamics in house!

Tuning does not fix mechanical issues or misfires. Tuning is designed for vehicles that are already in good running condition and designed to make aftermarket parts work properly together.

If you feel your car has any mechanical issues or is misfiring please contact us and we can schedule a time before your dyno tune and fix any problems it has. If we strap the car on the dyno and find misfires or other issues we will charge you the dyno rate of 150 dollars a hour to repair the issues or remove the car from the dyno and re schedule your tune and charge you for the time on the dyno.

We do offer pre-tune inspections. (Call for vehicle pricing). Our pre-tune inspections can include:

  • Compression test / replace spark plugs
  • Boost leak test
  • Fuel pressure test
  • Clean MAF
  • Test front Oxygen Sensor

We are here to help!

There is nothing worse then getting your car tuned and not make the power you were hoping for all because the fuel pump or injectors you just purchased are too small or you end up with massive turbo lag because the turbo you choose is to large for the power you want.

Feel free to contact us and we can help guide you through picking all the parts for your build. We do this all day everyday and have a lot of experience with aftermarket parts and can help you decide what turbo, injectors, fuel pump and many other parts to get the most out of your tune and have a great driving car for the purpose you plan to use it for. We also are parts vendors for pretty much every major performance parts brand out there and price match any listed price online.

Contact us for your build advice, parts purchases, and part installations.

Note on tune appointments

Tune appointments will only be held for up to 30 minutes past the prior scheduled time. At that point we will move on to the next appointment and you will have to reschedule your tune for a later date and pay another deposit fee.

The $50 tune deposit goes towards your tune time slot. This deposit is non-refundable and non-transferable. If you do not show up, show up more than 30 minutes late, cancel your tune, or reschedule your tune date and time then you forfeit that deposit. You will then have to pay a new $50 deposit to schedule your new appointment.

Before modifying your vehicle, please understand the following:

  • Modifications and tuning can and most likely will void any vehicle warranty you have
  • Certain modifications and tuning is not street legal and designed for track use only
  • We are not liable for any modifications purchased from us, installed by us, or any vehicles tuned by us. Research before you modify your car and modify your car at your own risk
  • 2013-14 WRX’s have a high failure rate and have class action lawsuits against Subaru. The factory Subaru engines have some known issues, but in these years the failure rates are even higher then others, stock or modified.
Tune Pricing
(Pricing may vary per vehicle and these prices cover most vehicles in each category)
  • Subaru Stock Location Up To 450 HP – $350
  • Subaru Stock Location/Rotated Turbo With MAF From 450-650 HP – $400
  • Subaru Rotated Turbo No MAF (Speed Density) 650+ HP – $450
  • Subaru Flex fuel or dual E85/pump $600 (includes draining gas and 12 gallons of E85)
  • Evo 8/9 up to 500HP – $350
  • Evo 8/9 Speed Density Tune 500+ HP – $400
  • Evo 8/9 dual E85/pump – $600 (includes draining gas and 12 gallons of E85)
  • Evo X up to 450 HP – $350
  • Evo X 450+ HP – $400
  • Evo X dual E85/pump and flex fuel – $600 (includes draining gas and 12 gallons of E85)
  • Ford Eco-Boost – $350
  • Mazda Miata (Requires Stand-alone EMS) – $350
  • BRZ/FRS openflash tablet $300
  • Other makes and models $150 per hour
  • Dyno rental – $150 per hour (includes AFR and boost monitoring and strapping / unstrapping)
  • Dyno Day Rental available for car clubs (email for pricing)
  • Dyno pulls – $100 for 3 pulls

Pre-Tune Checklist

  • Make sure you have the fuel you want to be tuned on in your vehicle when you come in for the tune. If you tune on 93 octane you will make more hp but you can damage your engine if you boost with 91 or 92 octane in your vehicle. If you want to be able to run 91, 92, or 93 then you will want to tune your vehicle with 91 octane in it.
  • We cannot tune with misfires or a bad front O2 sensor (vehicle AFR sensor)
  • If you don’t know the history on your spark plugs please replace them beforehand 
  • No exhaust leaks  
  • No massive oil/coolant/transmission fluid leaks.
  • Fresh Engine Oil To Prevent Engine Failure At Higher RPMS. No Mobil One Or Royal Purple Recommended In Turbo Subaru Engines
  • At least a half tank of gas you want tuned with example 91, 92, 93, E85. Unless we are doing flex fuel or dual pump/E85 tunes (if dual tune/flex
    fuel we recommend coming in with 1/4th – 1/2 tank)
  • Verify no boost leaks
  • Verify front 02 sensor is in working condition
  • Tuning 02-07 WRX/STI models for over 22 PSI an aftermarket map sensor is required
  • Tuning 08+ WRX/STI models for over 26 PSI an aftermarket map sensor is required
  • Clean out passenger seat
  • Make sure tires are fully inflated to the correct pressure
  • Make sure your clutch is not slipping and able to handle the torque for upgraded mods
  • Make sure your battery and charging system are operating properly
  • Vehicle must be road ready
  • No massive group of friends. 
  • Recommended not to have 91 non oxy or non ethanol. This is bad for turbocharged engines and is basically 87 octane in real life testing. We will tune your car on that fuel and you will make substantially less hp. If you decide to come back with a better fuel you will have to pay for a tune adjustment (dyno hourly rate).
Have Questions? Call Today!
(763) 316-5882