Welcome Guest! Would you like to log yourself in? Or would you prefer to create an account?

Search for Products by Keyword or Part Number
 search by product descriptions
Pick Your Language!
Spanish   Chinese (Simplified)   Chinese (Traditional)   Japanese   Portuguese
German   Arabic   French   Russian   Korean
Italian   Dutch   Greek   Turkce
MegaSquirt I Kits
MegaSquirt II Kits
MegaSquirt III
MegaSquirt 'Mod-Kits'
MegaSquirt Complete
MS Display Devices
GPIO Board
MS Adapter Boards
Wiring Components
Weather Pack Kits
Fuel Delivery
Trigger Wheels
Air Intake Components
Coils and Ignition
Boost Control
WideBand o2 Systems
EGT Measurement
Datalogging Systems
B & G CPUs and PCBs
Cases & Endplates
Tuning Cables
T-Shirts - Decals - Books
MS Service Parts
Gift Certificates
Package Deals
Security is TOP Priority securely accepts Visa, Mastercard, American Express, Discover, Diners, and JCB with 128-256bit Extended Validation SSL encryption for your protection! also accepts Paypal for your convenience! is fully PCI Compliant!  We take your security very seriously here.

Social Bookmarking

Add to browser favoritesAdd to Twitter Add to StumbleUpon Add to Squidoo Add to MySpace Add to Google Bookmarks Add to Facebook Add to Digg Add to

MicroSquirt Engine Management System w/ 30" wiring harness

  Add to Wish List  


MicroSquirt Engine Management System w/ 30\" wiring harness



New V3.0 versions are here!

MicroSquirt is a fully-assembled surface mount (SMT) version of the MegaSquirt fuel injection controller and is most like the MegaSquirt-II and V3 main board assemblies. The intended use is aimed at motorcycles, snowmobiles, personal watercraft, and other similar applications. Wiring harness is included (approx. 3'). This also comes with an RS232 serial cable.



MicroSquirt is basically the same as the MegaSquirt-II/ V3 main board, with the main difference in the injector drivers, MAP sensor which is external to the case, and connectors (the VR circuit is also different).


  1. The fuel injector drives will max out at 5 amps each, enough to drive one low-impedance (or 4 high-impedance) injector per bank. To get everything to fit without lots of heat sinking, MicroSquirt uses the ST VND5N07 from STMicroelectronics to drive the injectors. This is not a 'peak and hold' driver, but it does clamp the current at 5 amps, so it can be used with one low-impedance injector per bank, however the close time may be a tad higher (or you can use resistors). For up to 4 high-impedance injectors per bank, it should work fine. For example, for motorcycle use MicroSquirt will be perfect!
  2. In order to shrink the 'footprint' of MicroSquirt, the MAP sensor was left off the board. An external MAP sensor, such as those from General Motors products, can be used instead. See the MicroSquirt hardware page for more information on MAP sensors.
    1. We carry and recommend either the GM 3 bar MAP sensor for an easy weather-tight solution, or you can also you an 2.5 bar MPX4250AP which is the standard MegaSquirt MAP sensor, it's designed for PCB mount, but you can get creative if you'd like.
  3. The board will also use the 35-pin AMPSEAL connector and a sealed case to make a fully sealed unit. Amazingly, the board is the physical size of a business card - connector and all. MicroSquirt's board size, including the 35-pin AMPSEAL connector, is very small - 2.4" x 3.5" (61mm x 89mm), just slightly bigger than a credit card. The case measures:
    • Length (end plate to end plate, not including flange): 2.75" (70 mm)
    • Length (end plate to end plate, including flanges): 3.75" (95 mm)
    • Width: 3.73" (95 mm)
    • Height: 1.70" (43 mm)

MicroSquirt also has dual channel ignition logic level outputs as well as both the Variable Reluctor (VR) and optoisolated 'Hall/optical/points' tach inputs.


The bootloader is externally accessible, so there's no need to open the case, even to load new code. And the serial RS-232 signals come out of the AMPSEAL connector (instead of a DB-9 on the front, as with MegaSquirt). The board is sealed in a weather proof enclosure.




To use a GM 1, 2, or 3 bar MAP Sensor with the MicroSquirt

GM 3 Bar MAP Sensor

In the illustration:

  • A is ground,
  • B is the sensor output signal to MicroSquirt,
  • C takes 5 Volts from MicroSquirt.

The pins are marked A-B-C on the sensor itself.





More Info

Mfg Info

Bowling & Grippo

Manufacturer Info
Bowling & Grippo Homepage
Other products

Extra Info

Product Reviews
Current Reviews: 1Read Reviews
Write a review on this product!

Extra Info
This product was added to our catalog on .Notify me of updates to MicroSquirt Engine Management System w/ 30" wiring harness
Tell someone you know about this product.
  Add to Wish List  
We Also Recommend :
MAP - GM 3 Bar MAP Sensor
MAP - GM 3 Bar MAP Sensor
  Buy 'MAP - GM 3 Bar MAP Sensor' now  
MAP - GM 3 Bar MAP Sensor 6" Pigtail
MAP - GM 3 Bar MAP Sensor 6" Pigtail
  Buy 'MAP - GM 3 Bar MAP Sensor 6" Pigtail' now  
Customers who bought this product also purchased
Shopping Cart more
0 items
Product Reviews more
Write ReviewWrite a review on this product!
Shipping and Returns
Privacy Policy
Conditions of Use
Gift Voucher FAQ
Contact Us
Specials more
JimStim v1.5 MegaSquirt Stimulator w/ Wheel Simulator -Unassembl
JimStim v1.5 MegaSquirt Stimulator w/ Wheel Simulator -Unassembl