I like to look at my timing table in true timing ( time (ms) btdc ) rather than angle btdc and thought maybe someone else would too. Here's how;

Apply this conversion to each column. ( let me know if there is an easier way )

TimingAngle / ( rpm * 0.006 ) = time (ms) before top dead center

The reason I like to do this is because it gives you a great indication of where your peak torque is. It will generally be the lowest value because that will be where you have the highest load. Granted a veteran tuner can see this in the angles but I like to see it both ways.

For anyone interested here is the conversion to come up with the equation.

1rotation/1minute =
360degrees/60000ms =
.006 degrees/ms

Rpms * .006 degrees/ms =
Degrees/ms

TimingAngle/(degrees/ms) =

Time

Nice username

You can set up VisualME7Logger to display and graph this information by using the following expression:


When logging this information what should we be looking at?  At WOT, my Jetta is pulling a pretty even .6ms all the way to redline.  What is optimal time for WOT, cruising, part throttle...etc?  Can anyone provide examples?

Here is another great thread of ignition timing calculation. All we need to know is the timing/angle when we need to fire the spark plug to allow mixture explosion produce most of it force/pressure at the best moment for maximum power (MBT).

In theory we can do all calculations as complex as we can but talking real data (cylinder pressure per ignition timing plus other factors) will tell us if we are doing right or not. Of course an theoric aproximation will allow us to reach the best timing with the less effort possible. That is what I suppose ignition timing (msec) vs flame speed is all about.

Here is another great post about it calculation --> http://www.ecuconnections.com/forum/viewtopic.php?f=2&t=81.

That would be very cool. I've always wondered how they decide optimum torque.

I have these for my car.

Latest ECUxPlot includes true timing ...

If you are riding knock recognition, there isn't much you can do other than:

1) water/meth
2) better gas
3) richen AFR
4) less boost
5) numb KR (not recommended unless you have detcans and a ton of experience).