MegaSquirt® Electronic Fuel Injection Computer by Bowling & Grippo



The Most Efficient and Cost-Effective Electronic Fuel Injection Controller in the Universe - and YOU BUILD IT YOURSELF!

This site contains an archive of the early versions (circa. 2003) of the hardware and software documentation for MegaSquirt® EFI Controllers.
It remains here primarily for reference for older board versions and code (and to prevent dead links).


Select an Option on the Left Side to Proceed to the Archived Information...


If your V2.2 main board is RED, your board is NOT a Bowling and Grippo main board, and the instructions here DO NOT APPLY to your board. You may wish to ask your seller to exchange it for a genuine B&G board, or give you your money back. If the seller won't exchange the board for a real board, or give you your money back, you should complain to eBay/PayPal (assuming it was an eBay purchase).
For the latest up-to-date MegaSquirt® EFI controller info, please start at:



© 2003, 2011 Bowling and Grippo. All rights reserved. MegaSquirt® and MicroSquirt® are registered trademarks.