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 or email us at [email protected].
If you are looking for build advice and to purchase some parts, JM is the 1 stop shop to buy parts, get them installed, and get your car tuned. Contact us today to begin your build – no build is too big or too small for our experts. More information can be found by visiting our parts page and filling out the form.
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 & 14+ Subaru Forester XTs
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 every day 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.
*Due to the high volume of inquiries on build advice we can only offer this to customers who purchase their parts through us. Time is money and knowledge isn’t free. We price match any online price. Your parts supplier should be able to give you the proper advice to purchase the proven parts for your goals and plan of use. If your parts supplier can’t give you any direct knowledge of the part besides what’s listed in the description it might be time to find a different parts vendor. If you are looking to purchase parts through us, we will gladly put a build list together for you to meet your goals and make sure you have all the best dyno proven parts.
Times are changing. To keep the aftermarket performance industry alive and following Cobb’s “Project Green Speed”, we do not disable any check engine lights while Tuning. That means we won’t tune your car if you have a Catless or non GESi J-Pipe , TGV, or EGR Deletes. If you have any questions or are unsure if we can tune your car, please contact us at [email protected]
Cobb Tuning Project Green Speed Updates.
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).”