---
product_id: 12256508
title: "MegaSquirt 3 Programmable EFI Engine Management System V3.57 Assembled Unit by DIYAutoTune"
brand: "diyautotune"
price: "$16.67"
currency: USD
in_stock: false
url: https://www.desertcart.ec/products/12256508-megasquirt-3-programmable-efi-engine-management-system-v3-57-assembled
store_origin: EC
region: Ecuador
---

# Real-time tuning software 2 stage nitrous control 8 channels fuel control MegaSquirt 3 Programmable EFI Engine Management System V3.57 Assembled Unit by DIYAutoTune

**Brand:** diyautotune
**Price:** $16.67
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Tune In, Power Up!

## Quick Answers

- **What is this?** MegaSquirt 3 Programmable EFI Engine Management System V3.57 Assembled Unit by DIYAutoTune by diyautotune
- **How much does it cost?** $16.67 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/12256508-megasquirt-3-programmable-efi-engine-management-system-v3-57-assembled)

## Best For

- diyautotune enthusiasts

## Why This Product

- Trusted diyautotune brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Data-Driven Decisions:** Utilize free tuning software for real-time adjustments and comprehensive data logging.
- • **DIY Enthusiast's Dream:** Assembled unit ready for installation, perfect for those who love to customize their ride.
- • **Precision Under Pressure:** Built-in 2.5 bar MAP sensor accurately reads up to 21 psi of boost for enhanced tuning.
- • **Unleash Your Engine's Potential:** Experience 8 channels of sequential fuel and ignition control for optimal performance.
- • **Nitrous Boost at Your Fingertips:** Take command with a 2 stage nitrous controller for that extra kick when you need it.

## Overview

The MegaSquirt 3 Programmable EFI Engine Management System V3.57 by DIYAutoTune is a cutting-edge solution for automotive enthusiasts, featuring advanced fuel and ignition control, nitrous management, and real-time tuning capabilities, all designed to maximize engine performance.

## Description

MegaSquirt-III Engine Management System w/PCB3.57 - Assembled Unit Part # MS3357-CIt's finally here! The MegaSquirt-III is a drop in daughter card that greatly expands the MegaSquirt's functionality.We now have complete, ready to run MegaSquirt-III ECUs. This is the basic, batch fire version, but can be expanded to add sequential injection and 8 channel ignition control once the MS3X expansion board is out. As it is, you'll gain a lot more processing power, speed, and features over the existing MS1 and MS2 systems even without the MS3X. The MS3 daughter card on its own will give you all these features and more: VE and ignition tables are now both 16 x 16 0.1% steps on VE table, 0.1 degree steps on ignition table Socket for an onboard SD card - no laptop required for data logging (SD Card not included) Built in USB port GM stepper IAC control Closed loop idle and mixture control CANBus communications for interface with GPIO Board, IO Extender, or other devices Staged injection Native support for many different OEM trigger patterns The MS3 also gives you a starting point for even more expansion. You will be able to connect the headers on this board to additional hardware, such as the MS3X board to enable features like these: 8 channels sequential fuel control 8 channel sequential ignition control Individual fuel and spark trim for cylinder by cylinder tuning 2 and 3 channel PWM IAC control 2 stage nitrous controller Table switching for multi-fuel engines 2 step launch control  For complete MS3 documentation please search for ms3efi

## Features

- 8 channels sequential fuel control
- 8 channel sequential ignition control
- 2 stage nitrous controller
- Free tuning software allows for real time tuning and data logging for later analysis
- Built in 2.5 bar MAP sensor reads up to 21 psi of boost

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | MegaSquirt |
| Brand | DIYAutoTune |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | MS3357-C |

## Images

![MegaSquirt 3 Programmable EFI Engine Management System V3.57 Assembled Unit by DIYAutoTune - Image 1](https://m.media-amazon.com/images/I/51B0lraIj4L.jpg)

## Questions & Answers

**Q: want to install this on my E55 amg w211. will it give me different mapping? for example: 1. city -less power better milage. 2. stock. 3 race- opt.perf**
A: Usually you can get a map dialed in to avoid any compromises between power and mileage. The MS3 allows several forms of map switching; you'll want to check the documentation under "Table switching and blending" for details. Common uses for table switching would be a race gas vs pump gas switch, mufflers vs open headers, or other times when there's a change in engine or fuel setup.

**Q: Is this kind of like pnp, minus having to make a harness? also, does it support vvt?**
A: You will want to get the version with MS3X to support VVT. Most VVT applications would also need the MS3X for sequential injection and distributorless ignition.

**Q: What all does this system come with**
A: The basic MegaSquirt items are sold on an a la carte basis. This package includes just the ECU and a solder cup connector to make a wiring harness.

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**Shop now:** [https://www.desertcart.ec/products/12256508-megasquirt-3-programmable-efi-engine-management-system-v3-57-assembled](https://www.desertcart.ec/products/12256508-megasquirt-3-programmable-efi-engine-management-system-v3-57-assembled)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-23*