A/F & Timing
A/F & Timing How lean is still safe on a z06? My car is at 12.7 right now at wot with 25-26 deg of timing with 0 knock retard. Will I gain any power from leaning it out to 13.0 and adding 1 or 2 deg of timing. To lean it out at wot do I adjust PE Modifier Based on RPM? It is .86 right now from 3200rpm on up? I am still learning about tuning and am using EFI Live if that helps.
I would keep it right there. No need to get leaner or add more timing, keep it safe and have fun. You might be able to get a couple of degrees out of it or lean it out up top. DO not take away any fuel before or at the torque peak.
I am trying to get another 10rwhp or so. My car put down 377/371 and the norm seems to be 385 with alot of people even seeing 395rwhp. I know you can't feel 10 hp but it sucks to do mods and everything and end up short.
Go ahead and try adding advance while leaving the fuel the same. Often an increase in spark advance will show leaner on your wideband, so you'll get the effect you want without actually pulling any fuel.
How the engine responds depends on the entire combination and what it wants. The best way is to try it an measure power difference. See what the engine wants.
How the engine responds depends on the entire combination and what it wants. The best way is to try it an measure power difference. See what the engine wants.
Log some data with the scanner with the pids you want. In this case select or highlight the wide open throttle section of the log and then open the tuning tool and bamo the affected cells are laid out for you. I hope the screen shots turned out ok. I had to resize them down to 100kb a piece to get uploaded. I just used the HO spark table in the tuning tool as an example. You can do this with any of your tables, values.
Last edited by Doc; Feb 19, 2006 at 08:13 AM. Reason: one more thought
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Originally Posted by Doc
Log some data with the scanner with the pids you want. In this case select or highlight the wide open throttle section of the log and then open the tuning tool and bamo the affected cells are laid out for you. I hope the screen shots turned out ok. I had to resize them down to 100kb a piece to get uploaded. I just used the HO spark table in the tuning tool as an example. You can do this with any of your tables, values.
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