Ben’s VW Sand Rail and Miata

Currently powered by a single port 1500 VW motor. This one will be getting a full EFI system controlled by a Microsquirt EMS. We’ve also found the perfect turbo off a twin turbo Volvo straight six at the local salvage yard.  Stay tuned for methanol injected, turbocharged, aircooled goodness. 1999 Mazda Miata, Bell Engineering Stage4…

The EFI Tuners Guide Chapter 4 – Electronic Fuel Injection Options – TBI, MPFI, SPFI, ITBs and DI

Updated September 2022 by Jerry Hoffmann Chapter 4: Electronic Fuel Injection Options – Throttle Body Injection (TBI), MultiPort Fuel Injection (MPFI), Sequential Point Fuel Injection (SPFI), and Direct Injection (DI)   What is your starting point– Factory EFI Takeover? Or Carb-to-EFI Conversion? First off, let’s discuss the different people and perspectives that you’re approaching this…

DIYPNP Documentation for 1987-1992 BMW 325 (v2 template)

NOTE: The DIYPNPB55-K Kit has been discontinued as of 8/30/18. 1987-1992 BMW 325 USDM 2.5L M20B25 MT Test Vehicle Details: The vehicle used for drawing up these application docs was a USDM 1987 BMW 325is 2.5L M20B25 with a manual transmission.  All factory electronics/ignition system components are in place and the factory wiring harness is in…

MS3Pro Booth Gallery at Performance Racing Industry 2016

Using MSTweak to tune your MegaSquirt

(Regardless of the firmware you are using) Last Updated 3-21-2006 by Jerry Hoffmann, www.DIYAutoTune.com NOTE– this article is extremely dated now and kept here solely for archive purposes.  We don’t recommend MSTweak at this point in time.  We recommend instead using TunerStudio’s VE Analyzer Live feature!     Many of these principals are applicable for…

DIYPNP Documentation for 1987-1988 Porsche 944S

NOTE: The DIYPNPB55-K Kit has been discontinued as of 8/30/18. 1987-1988 Porsche 944S USDM 2.5L MT Test Vehicle Details: The vehicle used for drawing up these application docs was a USDM 1988 Porsche 944S 2.5L with a manual transmission.  All factory electronics/ignition system components are in place and the factory wiring harness is in satisfactory condition. …

DIYPNP Documentation for 1987-1992 BMW 325

NOTE: The DIYPNPB55-K Kit has been discontinued as of 8/30/18. 1987-1992 BMW 325 USDM 2.5L M20B25 MT Test Vehicle Details: The vehicle used for drawing up these application docs was a USDM 1987 BMW 325is 2.5L M20B25 with a manual transmission.  All factory electronics/ignition system components are in place and the factory wiring harness is in…

Different Approaches to MegaSquirt Installation

With all the different MegaSquirt options out there, chosing the right system can be a bit intimidating. The first decision you’ll need to make is the overall approach. Do you want to keep expenses as low as possible by soldering your own kit together? Or would you rather spend less time and more money? Here’s…

Troubleshooting MegaSquirt Injector Driver Installations

Got a problem with the injector drivers on your MegaSquirt? This article will walk you through how to troubleshoot them.  It is written for the V3.0 and V3.57 boards.  The V2.2 is similar but the component names are different.  It does not cover the MS3Pro line, MicroSquirt, MS3X, or MSPNP Gen 2, which use different…

How to MegaSquirt Your Toyota 22RE

This article submitted by [email protected] and has not been tested at DIYAutoTune.com, but we greatly appreciate you Darin, for all your hard work! Looking for the easiest way to MegaSquirt these trucks? Since this article was written, we’ve come out with a MegaSquirt PNP for 22RE powered trucks. This is a fully assembled, plug and…