MoTeC Global Forum

Hi all

Just to confirm I am not being dumb....

As I have ITB's I have set Engine Load Normalised Mode to "Throttle Position".

As this is used by the main ignition table, does that mean that this standard GPA 4 cylinder example table is upside down?

So an Engine Load Normalised figure of 0% equates to a TPS of 0% and hence the timing value should be around 8-10 degrees rather than the default table setting of 16.5 degrees?

Sorry...used to Pectel T6's and DTA's, just getting ready for initial startup.

If you don't like the order of the axis, use the Setup Axis dialog (shown below) and click the "Reverse" button next to whatever axis you want to reverse. To open this dialog either right click in the table and select Setup Axis... or click in the table, and press the "A" key for the shortcut.

The default values in the table are just a starting point. 16 deg at 0% throttle is just as valid as 8-10 -- depends on what the engine wants. Normally we tune the Ignition table for maximum torque, and the idle control system will target a lower Ignition timing (like 7-10 deg). The Ignition table just tells it what to use for maximum torque.

For starting, the igntion timing, comes from "Ignition Timing Cranking" -- look in Tuning->Ignition Trims for that table.

Thanks David, slowly getting there with this new fangled technology. Over 30 years of just tps vs RPM with ms injector is hard to forget but I think I getting there.
Now understand Engine load normalised etc, the ignition map just threw me as being almost upside down compared to my previous maps. Looking at it I reckon it is like that just to be safe, never a bad thing.
Think I am going to go for the recommended Motec multi throttle tuning method just to simplify things.
Going to be interesting trying to get the car driveable without a rolling road/engine dyno to rely on!