Frequently Asked Questions


Q: Guarantee Statement

A: Satisfaction is always 100% guaranteed and if it doesn't work out for you for any reason, just return the chip within 30 days for a full refund, no questions asked. Special ordered custom built chip programs excluded. If you discover any problem with the quality or operation of your chip, immediately contact customer service or call us.

Q: What are the shipping rates?

A: Shipping and handling for chips is a flat rate $6.00 throughout the U.S and $20 outside the U.S. including countries in Europe, Asia, South America, and and Australia. Chips shipped outside the U.S. are sent in a nondescript envelope with a minimal customs value for rapid delivery. Larger items such as suspension components are more and will be indicated during checkout.

USPS or FedEx is typically used, with a tracking number provided to U.S. packages prior to shipment. Express or priority shipping are additional options listed, or via FedEx by request. If you ever have a specific inquiry as to the method of delivery, please contact

Q: What is the return policy?

A: For hard parts such as suspension components, you may return any item within 30 days in its unopened, original packaging for a full credit, minus shipping charges. If the product is defective we will provide you with a same item exchange, and we will pay the shipping. Chips are provided with a full lifetime guarantee to the original purchaser against defects.

Q: How long does it take to process an order?

A: Typically, most orders are processed within 48 hours. Typically we do our best to ship it out the following day. Customized chips typically take a few days longer and an estimated time frame can be provided upon inquiry. All weekend orders, will be batched on Monday, or the next business day, in the event of a national holiday.

Q: Do you ship world wide?

A: Yes. We ship to the United States, all of its territories, to APO and FPO addresses, Europe, Asia, and Latin American countries.


Q: I purchased a chip for one configuration a while back, and would like to change to another.

A: For the original customer, you may have your chip reprogrammed from one standard configuration to another for $100 plus s/h. Custom chips are excluded.


Q: Can I install my chip before completing my planned modifications?

A: Absolutely. The differences between the chip configurations are to primarily optimize power and response for each particular setup. The chip typically makes over 75% of the performance gains to the car's hp, torque, and response characteristic over any exhaust modification, so you can install the chip now and enjoy all the potential power your car has to offer, and install your mechanical modifications at your convenience.


Q: What are the design objectives of the 911Chips performance chips?

All 911Chips performance chips are programmed with three primary objectives in order of importance:

1. Reliability

2. Maximum performance, response, and power

3. Good fuel efficiency at cruise and light loads

Our chips have been designed to produce the maximum power and response available from your car by optimizing the fuel and ignition tables to each owner's particular engine configuration and requirements. A very extensive matrix of chip programs has been developed customized to a large combination of intake and exhaust modifications, including sport mufflers, europremufflers, SSIs/headers, ExtrudeHoning, 91 or 93 octane, 95 or 98 RON octane, race fuel, high heat climates, rev limiters etc. This custom tailoring philosophy as opposed to one size fits all, ensures the maximum potential from an owner's car and is the reason to the success everyone raves about. In addition, the proprietary coding in our chips is the reason for the dramatic change in throttle response and low and midrange torque that you will not find elsewhere. For reliability, the chips are erred on the side of safety for high stress conditions such as on the track and 91 octane fuel.

As objective 3 above has no bearing on objective 2, we leave the low load fuel regions factory so that you will continue to enjoy factory fuel economy and emissions while putting around town, or cruising on the highway. In addition, the ignition tables are optimized to improve the efficiency of the engine with the use of premium fuel. Feedback from customers have reported an average increase of 50 miles per tankful in highway fuel efficiency over the stock chip.


Q: Will my car pass my state's smog test?

A: While meeting emissions has never been an objective of our chip to prevent any compromises in meeting maximum performance objectives, meeting objective 3 of our design philosophy above just happens to produce an emissions compliant exhaust because the air/fuel ratios have not changed to affect a stringent emissions test such as the stringent California 15 and 25 mph rolling dyno test because we are in a low load region of the fuel maps. Also since Motronics just happens to be a system that functions much better and more efficiently with closed loop feedback from an oxygen sensor, the chips are designed to take advantage of it in those cars that are so equipped. This means that whether you are smog testing on a dyno, or steadily cruising on the highway, the O2 sensor will still function to keep your mixture in check. In addition, the idle fuel and ignition maps are left factory. In a state such as California with very stringent emissions limits, although most cars pass emission testing without problem, swapping back to the stock chip and reinstalling the catalytic converter is recommended and will help to provide additional passing margin.

The following are the emissions results from a completely stock 87 Carrera 3.2 in Texas, except with the addition of a Dansk sport muffler and a 911Chips performance chip. As you can see, the emissions actually reads lower than average, and in fact, the CO of 0.01% measures about 60-90 times less than the standard limit, and at least 10 times less than the factory chip which typically measures between 0.13 to 0.18%! This is not uncommon as it has been reported by several owners around the U.S. that our performance chips have actually have tested cleaner than their previous tests with the factory software!

Click for full emissions test report


Q: How much power can I expect with your chip?

A: You can expect a 6-8% increase in horsepower and torque throughout the powerband on to redline, with a 10-20% increase in part throttle torque, horsepower and engine efficiency. Horsepower increases are approximately 12-16 hp and 20 lbs of torque through the powerband, with regions such as at 6500 with a 25-35 hp gain. The lag and delay currently experienced below 4000 rpm will be gone, with power coming on as soon as 1500 rpm and pulling hard all the way to the rev limit, providing much improved everyday drivability, throttle response and low and mid end torque. With more modifications to your motor, greater gains can be expected as the stock chip becomes more of a hindrance - as much as 20 hp with polished intake runners and a sport exhaust. At full throttle, the Motronic DME ignores all sensor inputs and injects no more fuel than has been factory preprogrammed for a stock motor. Modifications to the exhaust and induction system become a fruitless exercise without ignition mapping optimization and adequate fuel compensation, and fuel equals power. Since each chip is specifically tailored to meet each customer's specification and configuration, expect the maximum power derivable over a one size fits all chip solution. Expect at least a 0.5 second reduction in both your 0-60 and ¼ mile acceleration times.


Q: I want more power, all my engine can deliver. Is this possible

A: You may wish to consider having a chip customized to your motor either from your dyno data, or mapped on a dyno. We have done countless cars this way, including many class winning track vehicles who are probably kicking your butt! See the custom chip page for more information.


Q: Aren't all chips the same?

A: No. While some might tell you otherwise, the truth is like human personalities, not all chips are created equal. Some will run too rich overtaxing the cat, contaminating the O2 sensor, eventually causing idle stability problems, a smoky exhaust, poor fuel efficiency, and diluted motor oil. Others are either too lean in critical areas or too aggressive with their ignition timing maps, causing damaging predetonation. Most all of them are programmed for a stock motor and any modifications such as to the exhaust or intake will most likely cause a lean running condition and dangerous predetonation at high rpm loads, and certainly reduce the predetonation safety margin.

While it seems easy for a programmer to punch in some fuel and ignition values in the simple full throttle map, extensive reworking of the much more complex part throttle maps is what makes all the difference in torque and response, as that is where the majority of us spend at least 95% of our time. Many other chips only only remap the full throttle maps which does nothing for everyday driveability, torque, and fuel efficiency. Our chips are developed by 911 owners in conjunction with the countless feedback of many 911 owners to refine the best chips available. Testing includes extensive dyno tuning, track testing, and air/fuel exhaust measurements under real world conditions on while on the road with wideband sensor exhaust analysis.


Q: What are the rev limits set at, and are there any drawbacks to changing it?

A: For the 964s and 993s, the rev limit is kept stock at 6800 RPM, where we believe is the proper limit for an internally stock motor. For the 3.2 Carreras, the rev limiter is revised by about 240 rpm, from the stock 6520 limit to about 6760. Raising the limits higher than this are only by special request, and recommended only concurrently with internal modifications that properly support the higher limits.

Raising the rev limiter does not change the power curve or increase the peak hp of a motor as maximum power on most 911 motors are achieved around 6000 rpm. For the 3.2s however while the hp of the stock chip falls considerably after 5900 rpm, the power curve of the revised chip provides usable hp that extends considerably past this point with typically a new hp peak at 6200 with a 16 hp gain and often a 25-35 hp gain at 6500 rpm. The car will seemingly pull nonstop to the rev limit while the stock chip just runs out of steam. This may be of benefit to those who track their vehicles and would like additional operating margin before bumping the rev limiter as they approach their next turn, where it is too late to upshift, and too early to brake. For years now, many performance chips have set slightly higher rev limiters without any adverse effects reported. As a side note, in 1988, Porsche offered the 911 with option M637 (the Club Sport) with a revised limiter to 6840. However, a customer may request whatever limit he or she feels most comfortable with, including the stock limit. Just add a short note in the message window during the order process of your preference.


Q: How difficult is it to install the chip, and do I have to remove the seat?

A: Removing the DME from under the driver's seat is a very simple procedure and you do not have to remove the seat. With a 10mm deep socket and a ratchet wrench, it should take a first timer no longer than 15 minutes to remove the DME, swap the chips, and reinstall the box, even faster the second time around. Detailed instructions are included to assist you in your installation.


Q: Do you program a new chip or do I send in my old one for reprogramming?

A: You are programmed a new chip, you keep your old one as a backup.


Q: My car is an '87, how do I know whether I have a 24 or 28 pin chip?

A: 1987 was a transitional year when Porsche was in the process of changing from a 24-pin chip over to a 28 pin one. The only way to find out is to open your DME and count the pin legs on your current chip. It is typical black rectangular chip with a factory matte foil sticker on top with a sequence of numbers reading something like 1267355xxx. Visit the chip installation instructions section for the full guide on the removal and installation of a chip.

  • Porsche Carrera 3.2 (84-89)
  • Porsche 964 (89-94)
  • Porsche 993 (95-98)
  • You can also download the printable installation guides here to assist you in opening the DME:

    Download 84-89 3.2 Instructions
    Download 89-94 964 Instructions
    Download 94-98 993 Instructions

    (You may need Adobe Acrobat reader - click here to download - It's free)


    Q: What if the chip doesn't perform to my expectations?

    A: Satisfaction is always 100% guaranteed and if it doesn't work out for you for any reason, just return the chip within 30 days for a full refund, no questions asked. In addition, should code updates and revised versions of a series of chips become available, original customers can have their chips reprogrammed to the latest program at no charge. To see if a program update is available, customers should contact customer support to see if there is one available for their car.