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View Full Version : Dual spark maps, let me get this straight????



nitrorocket
August 7th, 2006, 03:46 AM
I run a custom O.S. 3 with a twin turbo LS1. I run 18.5 psi of boost on 93 octane. My question is....With the dual spark maps enabled, does it run off the high octane table untill KR is present??
I am wondering if I could enable this in case I were to ever fill up with a lower octane. I dont want my timing to change unless KR is detected while I am truly running 93 octane.

I am assuming that there is no way to do this safely. I would be relying on knock sensors to detect from blowing my motor to the moon. Also, if KR were detected at wide open throttle under full boost, I am sure it would be too late to stop and control detonation.


What is the difference between this, and the timing KR will pull out if KR is detected???
Any info or thoughts???

foff667
August 9th, 2006, 09:56 AM
from what i understand the computer will interpolate between the high & the low octane tables when it reads knock...there should be a PID you can view to see what % its taking from the high & low tables.

Tordne
August 9th, 2006, 10:07 AM
Answered HERE (http://forum.efilive.com/showthread.php?t=3119)

foff667
August 9th, 2006, 10:09 AM
yeah i saw that thread after the fact didnt realize he posted in two place :(

Tordne
August 9th, 2006, 10:16 AM
Don't know why there was more than one post made to start with LOL