Cart

Quick Links

MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i
MegaSquirtPNP G2 B8793 for the 87-92 BMW E30 325i

MegaSquirtPNP Gen2 B8793 for the 87-92 BMW E30 325i

From: $799.00

ProductQuantity

USB to Serial Adapter - Works with TunerStudio! – optional

In stock

QuadSpark Four Channel Ignition Module – optional

In stock

IGN-6 Six-Tower Coil Pack – optional

In stock

In stock

SKU: MSPNP2-B8793 Category: Brand:

Description

MegaSquirtPNP Gen2 – Plug-N-Play Standalone Engine Management System

*Fits multiple BMW models:

  • 1987-1992 325i (E30 Chassis with M20) *
  • 1988-1992 735 (E32 Chassis with M30)
  • 1989-1990 525 (E34 Chassis with M20)
  • 1989-1993 535 (E34 chassis with M30)
  • 1991-1993 M5 (E34 chassis with S38)

*Note: This does not fit 325e models with the eta engine (except the 1987 “Super Eta”), or the 1992 E36 chassis 325i with the M50 (in 1992, the convertible used the E30 chassis, while coupes and sedans received the new E36 chassis). These used a different ECU design. Additionally, some European 325i models for the 1987 year used an ECU with a part number of 0 261 200 073 or 0 261 200 081; this ECU is not compatible with the stock wiring on these cars.

Also, this MSPNP may not work with automatic transmissions on the E34 or E32 chassis, which rely on the fuel consumption signal for the transmission computer. Automatic equipped E30s used a hydraulic transmission control that isn’t an issue.

Second Generation MSPNP; Easy to Use and Install!    

MegaSquirtPNP Model #B8793 Features:

  • Fully Plug and Play Installation – No wiring required for basic functionality.  Average install time is under 1 hour!
  • M20 base maps is pre-loaded to help your engine start on the first turn of the key (other model base maps included on CD)
  • Real time tuning and data logging with a laptop connection
  • Supports most aftermarket wideband sensors

Fully Tunable Engine Control!

  • 16×16 Fuel Tables allow high resolution tuning
  • 12×12 Ignition Tables
  • Multiple Acceleration enrichment strategies
  • Closed Loop Idle Speed Control
  • Air Conditioner Control
  • Bank to bank fuel control with stock wiring, or 3 channel semi-sequential fueling with minor wiring changes
  • Onboard peak and hold drivers support both high and low impedance injectors – No external ballast resistor is needed!
  • Allows removal of stock airflow meter

Advanced Feature Set (Included!)

  • 12×12 Air Fuel Ratio Target Tables for use with wide band O2 sensor for precise tuning and table trim.
  • Built-in 2-step rev limiter / launch control with flat shift
  • Real time barometric correction
  • Internal 4-bar MAP sensor reads up to 44PSI of boost
  • Overboost protection
  • Closed loop boost control (Requires DIYAutoTune.com EBC solenoid kit)
  • Knock sensor input with adjustable sensitivity
  • Headphone output for knock sensor – listen for knock while you tune!
  • Table switching input. Change fuel and spark maps on the fly for different fuels, nitrous activation, etc.
  • Input for flex fuel sensor – switch between E85 and gasoline on the fly!
  • CANBus connector allows interconnection of other MegaSquirt-compatible devices for additional functions (EGT Input, Automatic Transmission Controller, Additional Sensors…..the possibilities are limitless!

What you get in the box:

  • MegaSquirtPNP B8793 ECU
  • MSPNP RS232 serial tuning cable, 6′ (USB adapter sold separately, if needed)
  • Tuning Software and Documentation USB Stick
  • 6′ Vacuum Hose for MAP Signal and ‘T’ fitting
  • Four Screws for ECU mounting

Here is a partial list of DME (stock ECU) part numbers that this ECU can replace:

  • 0 261 200 150
  • 0 261 200 153
  • 0 261 200 154
  • 0 261 200 173
  • 0 261 200 179
  • 0 261 200 350
  • 0 261 200 351
  • 0 261 200 380
  • 0 261 200 524
  • 0 261 200 525
  • 0 261 200 526

If you’ve run across a DME with a different part number and are curious if this will fit, please contact DIYAutoTune at websales@diyautotune.com.

Note: Although there is a paid upgrade to TunerStudio, it is not needed to tune this ECU. The free version included on the USB Stick can access all the features and tables of the MegaSquirtPNP. The paid version of TunerStudio simply adds tuning and analysis software, such as VE Analyzer Live to tune the fuel tables based on wideband O2 feedback (requiring a wideband O2 sensor and controller, sold separately).

Customers' review

5 stars 0 0 %
4 stars 0 0 %
3 stars 0 0 %
2 stars 0 0 %
1 star 0 0 %

Reviews

There are no reviews yet.

Be the first to review “MegaSquirtPNP Gen2 B8793 for the 87-92 BMW E30 325i”

Where is this product assembled?

  • This product is assembled in Suwanee, Georgia, USA

Is this all that I need to get started tuning my BMW?

  • The only other potential must-have is that if your laptop doesn't have a 9 pin serial port, you will need our USB to serial adapter to connect to this unit. However, there are several other things you may wish to add to use this unit to its full potential.

Will I need to make any changes to the trigger wheel setup to run a distributorless ignition?

  • The stock crank trigger can support distributorless ignition without any changes.

Questions & Answers

  1. 0 votes
    A

    As long as you're using a harness with a 55 pin ECU connector, this will be able to run the engine, no wiring changes needed. You will need to adjust the tune to what this engine needs.

  2. 0 votes
    A

    Some E30s had ECU controlled tachs and some early ones did not. The default tune is set up for those without an ECU controlled tach and you can turn the tach output on in software if needed.

    If you run into this issue, go to Basic Setup -> Tacho Output Pin, and make sure the tach output is enabled and the output pin set to Tachout.

  3. 0 votes
    A

    We typically use 93 octane for tuning unless we specifically wanted to tune the engine on something else (the 4.8 LS base map was tuned on 87 octane, but that's the only one I am aware of where we used a different fuel). The car was an Improved Touring build with minor bolt ons, so the base tune should be considered an approximate starting point rather than a final map to run.

  4. 0 votes
    A

    Yes, the MSPNP and its DIYPNP solder it yourself counterpart are still both in production.

    The instant fuel mileage gauge is one of the few things we were not able to keep working.

    On the MSPNP, the MS2's two spare analog inputs are being used for knock input and barometric correction. It is possible to repurpose them for other sensors, but difficult. If you need a lot of I/O, an MS3 may be a better option, although this is not plug and play.

    Yes, the MSPNP can do closed loop fueling based on O2 sensor feedback - either narrow band or wide band. On a turbo car, you'll want a wideband with an external control unit, like an Innovate LC2.

    A/C input input is standard.

    The MSPNP is shipped configured for the stock single coil. Running it in wasted spark just requires adding an external ignition module and coil pack, like our QuadSpark and IGN-6.

    We currently do not sell a TPS - a lot of E30 owners have adapted one for an E36. It supports most broadband Bosch knock sensors, although we currently do not stock these either.

    EFI Analytics sells a Bluetooth dongle that plugs into the MSPNP's communications port.

    We have some of the stock BMW connectors in our wiring components catalog, but not all of them. Check our catalog to see if we have what you need.

    Yes, the site accepts PayPal.

  5. 0 votes
    A

    Yes, it works with an M30B35 for the years listed - we include an approximate startup map for this motor on the USB thumb drive.

Send me a notification for each new answer.