Top Quality Source for Boat MEFI ECU Tuning | CO, KS, OK, TX, NE, AR, MO

We keep changing and have lots more information comming your way!

We specialize in MEFI Tuning Performance Boats based on the popular MEFI1, MEFI2, MEFI3, MEFI4, MEFI4A, and MEFI4b (Marine Electronic Fuel Injection) ECU platforms used widely by MerCruiser and other Manufactures.. Our services are available both for the serious competitor and the weekend warrior. If you are not happy with your current tune bring it us we'll fix it up for you.

MEFI Tuning
10909 W. Lotus
Wichita, Ks. 67209
(O) (316) 648-1229
(F) (316) 729-0758

If you have a desire to add more punch to your MEFI controlled power plant give us a call. We would love to hear about your needs and experience.

We take your tuning needs seriously. We do not take the cookie cutter approach to tuning. All of our tunes address specific combinations of components that have been dyno tested then fine tweaked on the water under actual conditions.

If you have a special need and are looking for package combinations we will go the extra mile to make sure you are happy with your investment. It is as much our reputation as it is your satisfaction.

For you owners that have the VOLVO driver package we have a package to convert your MPI/VOLVO systems to the DELPHI MEFI 4B controller. This includes ECU and all the necessary wiring harnesses. Additionally, we have packages to convert your MerCruiser ECM555 controlled engine commonly found on the 525's to the proven MEFI 4A or MEFI 4B system. Don't be locked into an expensive and limited tuning source.

Have you serviced your drive lately? Make sure you take the time to change lube and reseal if necessary. Also attend to those water leaks... you should have a dry bilge and sometimes we ignore them, take the time now to attend to those issues.

The 2018 boating season is fast approaching! Call us for your tuning needs and your power upgrades. We want to be your single source performance stop.

Remember we come to you or you can bring it to us. Get your power upgrades NOW. Don't wait any longer as the backlog is filling.

MEFITUNING now supports most commercially available EFI systems. We offer competitive conversions for those wishing to move from proprietary systems to open source systems. We will be supporting the Motorola PCM 555 for Mercury's Blue motors call for details!

Here is a sample of our tuning. Watch to the end for the full effect!


Here is another sample of our tuning. Watch to the end for the full effect!


And one more, This a pre-lake fire up.

Thanks for stopping and check back often.