Quote:
Originally Posted by DarkSunrise
The charts are data logs. The first chart is the stock tune. If you look at FLKC, you can see a few instances where it drops to -3.00 and below, particularly in the 6800-7000 RPM range. FLKC is the amount of ignition timing in degrees the ECU has learned to subtract (or add back if positive) based on the amount of detonation it has seen over an extended period of time. So -3.00 FLKC or worse would be indicative of fairly significant detonation in that RPM range. IAM also hovers around 0.20 (ideally would be 1.00), so the ECU clearly isn't happy with the amount of detonation it's seeing and is pulling a lot of timing universally (not just in specific RPM ranges and loads).
The second chart is the aftermarket tune. FLKC and IAM look much better in that log, so that shows the engine is running much better (and safer) given the poor quality fuel in SA.
These are simplified explanations but there's a lot of detailed information in the links in steve99's signature. Check them out if you're trying to learn more.
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i dont feel that the environmental conditions for the stock tune are fair. IAM 0.2? FLCK -3.0? pulling a lot of timing. Something must have happened,.. driving really hard?
I cant understand how this is a fair comparison..
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FRS
Current mods: K&N air filter, OFT, OFH, berk high flow cat front pipe, Q300 exhaust, lighter wheels