I sent him an email and he stated that it is for 91 octane like the rest of the, Also emailed me a set of instructions. Funny thing is that the instructions are written by ac schitzner. Maybe its just a copy of the eprom. No complaints from me on any of the other chips, im sure this one will be just as good as the others.
Heres a copy of the email.
Installation Instructions
Removing the ECU from the car
E30 3-Series
1.) The Ecu is located inside the car. Open the glove box. Remove the pins securing the glove box door to the mounting straps. You can let the glove box door rest on the floor
2.) 325E: Remove the Phillips screws on the front of the black plastic cover at the top of the glove box. Remove the black plastic screws at the rear of the black plastic cover. Pull this panel down and set it aside.
3.) Remove the 10mm bolts or the Phillips screws securing the engine control unit
(ECU) to the dashboard.
4.) Unclip the metal fastener locking the wiring harness into the ECU and remove the
harness. Take the Ecu to your workbench.
AT YOUR TABLE
1.) The Bosch part number on your ECU must be 0-261-200-175. If this number is not printed on the label – DO NOT INSTALL THE PERFORMANCE CHIP, your car will not be happy!
2.) Place the ECU on your table with its part number label facing down. Use a small pocket screwdriver to pry up the six locking tabs securing the ECU’s cover; pry each tab up only enough to insert the medium screwdriver. Use the medium-sized screwdriver to finish prying the tabs upward until they’re vertical. Be careful; the tabs will weaken with repeated prying. Remove the ECU cover and set it aside.
3.) Locate the socketed chip on the printed circuit board. Clue; the chip is secured with a white plastic clip in the shape of the letter “H”.
4.) Remove the retaining clip by inserting the pocket screwdriver into one of the small slots in the clip’s side and prying toward the other slot. The retaining clip will pop up on the side in which the screwdriver is inserted. Use your fingertip to hold that side up while you repeat the process for the other side. Set the clip aside – it will not be reused.
5.) This step is VERY important! By removing the original chip, examine how it is oriented in its socket. Particularly note where the “divot” is positioned. On some cars the divots maybe on opposite ends from each other. On others they may line up. IT IS CRUCIAL TO YOU THAT REMEMBER WHICH END THE CHIP’S DIVOT IS INSTALLED ON! Remove the chip from its socket with the pocket screwdriver. Insert the blade between the chip and the socket and pry gently upward. Alternately pry each end of the chip until it is COMPLETELY loose. WARNING: pry the chip from the socket – not the socket from the board! As you remove the chip from it’s socket, grasp it by the chip itself and not by the pins. THE PINS ARE FRAGILE! Keep the stock chip – you may want to reinstall it later.
6.) NOTE: the pins of all computer chips are very fragile! Every chip that leaves AC Schnitzer is inspected for quality. If the pins on the module, encryptor board ever become bent or tweaked DO NOT attempt to bend them back into place. AC Schnitzer will not be responsible for broken or damaged chips. Call us for instructions on getting a new chip sent to you.
7.) Remember the Performance chip must be oriented in the socket in the same fashion as the original chip was (this is why step 5 is critical). The chip has a U groove on it. This is the divot end. Rest one row of pins from the Performance Chip on the socket. Ensure that each and every pin lines with a corresponding socket hole. If each pin lines up then gently push down on each row to LIGHTLY set the chip in the socket. Avoid bending and flexing the printed circuit board while inserting the chip. Apply firm but gentle pressure on the chip during installation. Push down on the chip until it “clicks” into the socket. NEVER bend any of the pins to ease installation. Visually verify that all of the Performance Chip’s pins are in their corresponding socket holes and that all of the socket holes have pins.
8.) The white plastic retaining clip will not fit over your new Performance Chip. This is not necessary for the vehicle to run. Reinstall the ECU’s cover in the reverse order of step 2. Use the pliers to bend the locking tabs back into place.
9.) Reinstall the ECU into the car and plug the wiring harness back in. Start the car and ENJOY!
