I’ve seen a bit of buzz around various forums (partly from one of our testers) and wanted to provide everyone with an official update. GIAC is proud to announce that calibrations for the Simos 8.51 have been completed. We are placing the final touches on our in-house flashing and program switching systems. After which, stage 1 software will become available to the public. As with our Simos 8.4 3.0T software, this calibration yields dramatic power gains of 65-70hp and 28-35 ft. /lbs. of torque at the wheels on our tester A7, while retaining smooth and seamless drivability. We should be performing final dyno testing on one of our test S4/S5s in the next couple of days, so I can update this thread with those tests when I have them. I have our A7 dyno tests below in the meantime.

Switching options upon release will include:

• 91 or 93 octane pump performance mode
• 100 octane race mode
• stock performance mode
• valet mode

When released, ECUs will need to be removed and shipped to GIAC for programming. I should have some more formal information. Stay Tuned!

Here are the numbers we saw with our tester A7:

 

Nice, there will be bunch of quick S4s.