Initial Spark Advance Table Calculator

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Creating an Initial Spark Table for Tuning

This is a tool for establishing a baseline spark advance table for your tuning efforts with MegaSquirt® or MicroSquirt® controllers. It is designed to work in Mozilla Firefox 6.0, though it may work with other browsers. It is based on the 'rules of thumb' presented here: Making a Spark Advance Table

This calculator has not been tested on all possible engine combinations and operating parameters.
Use it at your own risk.

1. Input:

Fill in all of the values below (use your best estimate if you don't have measured numbers, but remember your table will only be as good as your estimates, and sometimes quite a bit worse).

Cylinder Bore:
Combustion Chamber Type:
Fuel:
Compression Ratio:
Idle Vacuum:	in·Hg
Maximum boost level: (0 for naturally aspirated, max. boost (psi) for turbo/supercharged)	psi (21 psi maximum)
Maximum RPM:	RPM
Idle RPM:	RPM
Spark advance table dimensions:	MS-I uses 8×8 tables; MS-II, MicroSquirt, and the Sequencer use 12×12 tables.

2. Generate the Advance Table in .TABLE format:

Click on the "Generate Advance Table" button:

A 'pop-up' window will open containing the .table formatted text (you may have to disable any "pop-up stopping" software). If you get an error alert instead, you will have to correct your input values before continuing.
'Select' entire contents of pop-up window (Click anywhere in the pop-up and press Ctrl & A together),
'Copy' entire contents of pop-up window (Ctrl & C),
Open NOTEPAD.exe (under Start/Programs/Accessories/Notepad)
note- WordPad does not work, you need a text editor that preserves the spaces but not the html tags.
'Paste' contents into into Notepad (Ctrl & V),
'Save' as 'YourFile.table'.

3. Verify and Load to your MicroSquirt:

Open TunerStudio and navigate to 'Basic tables→Spark Advance Table' then click on the down-pointing greed arrow icon, and browse to select YourFile.table',
Burn the values to the controller if prompted,
Verify that the spark advance numbers and map/rpm bins are suitable for your engine.
Remember that the table generated is only a starting point for tuning. Using the generated table as a 'final' table under severe operating conditions can destroy your engine. Be sure to follow the tuning guide, and get professional assistance whenever your are not sure.

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.

©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.