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M50B25 ALPHA-N CHIP

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Description

This tune is specifically intended for M50B25 engines running without a MAF sensor*, instead utilizing only IAT + TPS to tune. This tune works with the STOCK Bosch Motronic 402, 403, 413, and 506 ECUs. However, this is still a relatively new product and may still contain a few bugs. As such, we may offer free chip reflashes to updated software in the future at no cost.

These tunes are region specific, and a tune for sea-level may not operate as ideally at high elevation. The use of a well working, stock o2 sensor will help the ECU adjust for elevation changes.

*IAT sensor must be retained for best results, but may be removed. If you choose to remove the IAT sensor, your tune will be region and temperature specific, as air density is directly related to those factors.

At the moment, forced induction is not supported as, without a method to measure airflow or pressure, there are far too many factors involved to provide stable tunes over the internet. However, we do offer alpha-n forced induction tunes at our shop location in Colorado. Please contact us to setup an appointment!

Bring your M50 to life with this fully tuned, daily driven, and track tested performance chip. The SSSquid Tuning performance chip is the most complete tune on the market, with every aspect of the mapping being optimized from idle to wide-open-throttle. Not only are SSSquid tunes the most complete software solutions on the market, but they go beyond ignition and fueling, often including ECU firmware upgrades utilizing modern techniques and instrumentation not previously available.

This chip is compatible with:

  • 1992-1995 BMW E36 325i
  • 1992-1995 BMW E34 525i

STAGING GAINS*:

STAGE +HP +TP +RPM
0.5 12 13 400
1.0 15 18 500
1.5 22 25 700
2.0 45 53 900
2.5 60 75 900
3.0 75 88 1200
*over a stock vehicle on a stock tune. HP/TQ numbers are general estimates and will vary.

Don’t know what stage you need? Looking a little advice? Please see the GETTING STARTED page or CONTACT US for more information!

 

If you are using a Bimmerheads Cam and/or Performance Head then I highly recommend you go support them by buying the specific tune directly from them! These tunes can be purchased on their website at Bimmerheads.com.

Additional information

Injector Flow

Stock, 19, 20, 21.5, 22, 24, 29, 30, 32, 36, 42, 60, 83

Fuel Rating

87, 89, 91, 93

stage

0.5, 1.0, 1.5, 2.0, 2.5, 3.0

ECU

402, 403, 413 Red, 413 Silver, 506

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