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 other 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.
We have a lot of information about tuning and modifying your car; before doing so, please read all of the information provided in the links above.
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
There is nothing worse than getting your car tuned and not making 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 too 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 from authorized dealers.
Contact us for your build advice, parts purchases, and part installations.
Check out our pricing list for the most common vehicles, dual tunes, dyno rental, and more.
Check out our pre-tune checklist to make sure you and your car are ready for your scheduled tune.
Get all you need to know on modifying your 2015+ WRX or STI with first-hand experience from JM.
Click below to fill out your pre-tune form to help us get the most out of your upcoming tune.
Save time and click below to sign your tune waiver ahead of your schedule tuning session.
Sometimes knock is also called detonation. Detonation is characterized by the air/fuel mixture spontaneously igniting during the compression stroke. The force of this early, unintended explosion is counter to the direction of the piston and results in a sharp increase in cylinder pressure.
Thanks to the power of the AccessPORT, it’s now easier than ever to gain unparalleled insight into the current status of your engine’s tune and running condition at any given time.
You can find the serial number to of your Accessport V3 underneath the faceplate of the device or within the software. The serial number can be found in the software by selecting “Help” at the top, then selecting “About Accessport”, lastly scroll down until you see “Serial Number Sticker”.
Garrett Turbo describe boost creep as the following:
“Boost creep is a condition of rising boost levels past what the predetermined level has been set at. Boost creep is caused by a fully opened Wastegate(s) not being able to flow enough exhaust to bypass the housing via the Wastegate(s) itself. For example, if your boost is set to 12psi, and you go into full boost, you will see a quick rise to 12 or 13psi, but as the rpm’s increase, the boost levels also increase beyond what the boost controller or stock settings were. Boost creep is typically more pronounced at higher rpm’s since there is more exhaust flow present for the Wastegate(s) to bypass. Effective methods of avoiding or eliminating boost creep include porting the internal Wastegate(s) opening to allow more airflow out of the turbine, or to use an external Wastegate(s).”