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Creating an Initial AFR Table for Tuning

This is a tool for establishing a baseline AFR table for your tuning efforts with MegaSquirt® or MicroSquirt® controllers. It is designed to work in Internet Explorer 6.0, though it may work with other browsers.

1. Input:

Idle RPM: RPM 300 rpm minimum
RPM redline (maximum operating rpm): RPM 12000 rpm maximum
Peak flywheel horsepower: HP @ RPM
Peak torque: lb·ft @ RPM
Engine displacement: liters
Engine maximum boost level:
(0 for naturally aspirated,
max. boost (psi) for turbo/supercharged)
psi 21 psi maximum
AFR table dimensions:
  • MS-I uses 8×8 tables;
  • MS-II, MicroSquirt, and the Sequencer user 12×12 tables.
Click the "Reset" button to return to default form values.

2. Generate the AFR Table in .TABLE format:

3. Verify and Load to MegaSquirt:

MegaSquirt® and MicroSquirt® controllers are experimental devices intended for educational purposes.
MegaSquirt® and MicroSquirt® controllers are not for sale or use on pollution controlled vehicles. Check the laws that apply in your locality to determine if using a MegaSquirt® or MicroSquirt® controller is legal for your application.
©2004, 2011 Bruce Bowling and Al Grippo. All rights reserved. MegaSquirt® and MicroSquirt® are registered trademarks. This document is solely for the support of MegaSquirt® boards from Bowling and Grippo.