Z1 Motorsports: GTM TT kit on 7spd auto 456rwhp at 7psi

Phimosis · 06-14-2010, 12:54 PM

Let me rephrase my original post: I have an aftermarket tune from Technosquare. The graph is very smooth on my car and it's not because of the smoothing algorithm. The lumps you see in this engine's graph are over too wide of rpm range to be smoothed, so it's not that no one has figured out how to properly tune an engine with vvel.

New engine management systems progressively retard timing with very high sensitivity to knock - long before you can sense it. Progressive timing retard occurs without the driver sensing it because it's progressive... So the only way to know if it's pulling timing is if your obd is giving data to tell you. I plugged an uprev into mine and looked around. I didn't see it logging total ignition advance. Does it? If so, graph it trough the rev range and see if it's stable across those dips.

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06-14-2010, 12:54 PM	#11 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 417	Let me rephrase my original post: I have an aftermarket tune from Technosquare. The graph is very smooth on my car and it's not because of the smoothing algorithm. The lumps you see in this engine's graph are over too wide of rpm range to be smoothed, so it's not that no one has figured out how to properly tune an engine with vvel. New engine management systems progressively retard timing with very high sensitivity to knock - long before you can sense it. Progressive timing retard occurs without the driver sensing it because it's progressive... So the only way to know if it's pulling timing is if your obd is giving data to tell you. I plugged an uprev into mine and looked around. I didn't see it logging total ignition advance. Does it? If so, graph it trough the rev range and see if it's stable across those dips.