Question to the self-mapper among us: Knock detection?
06-03-2010, 03:13 PM
Post: #2
 
Start map: Fuel -> based on engine simulation software. A good estimate of the final torque curve (comparable engines) is a good start too. Add 25% everywhere and calculate how much fuel you need for the torque. Use that to estimate dutycycle.

Iginition..Start with the 4AGE base map. smooth out any bumps and take out 5 degrees of timing.

First pass: drive car with data logger untill all cells in fuelmap have corresponding A/F ratio values. Adjust fuel to target A/F-ratio's. (Megatune software is supposed to have a autotune mode for this).

Second pass. Plug in headphones/ knock amp, etc (best not to use auto-detection during tuning). Start advancing ignition untill engine makes no more power or starts to knock. Very difficult to get right without a decent load dyno.

After that the finetuning starts.. not much use doing that without a dyno either. However, car should be perfectly driveable.

A wheel to steer the front of the car
A pedal to steer the rear
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Messages In This Thread
[] - NoHachi - 06-03-2010 03:13 PM
[] - Uzelac - 06-03-2010, 03:29 PM
[] - NoHachi - 06-03-2010, 03:41 PM
[] - Uzelac - 06-03-2010, 04:41 PM
[] - MartinS - 06-03-2010, 05:52 PM
[] - NoHachi - 06-03-2010, 09:41 PM
[] - Speedline - 07-09-2010, 10:04 AM

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