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Tuner in Training
Weird spark advance on deceleration
Hello all,
I'm currently tuning DFCO entry (and a few other things) after new exhaust, headers, and a ported intake manifold. I have my WOT and part throttle tune pretty much dialed in; I'm now trying to get DFCO working the way I want it. I want some good burbles, pops, and maybe some flames when the throttle closes after WOT, but I want to get into DFCO after a couple seconds of all that.
Car setup is:
2013 Corvette C6 A6
custom cam, ported heads
BER ported intake manifold
Alky progressive methanol injection
AFE/Pfadt 1-7/8" tri-y headers
AFE/Pfadt catless x-pipe
Holley/Hooker Blackheart Dual-Mode axle-back
Halltech MF103 CAI with nomex wrap
Pro-Torque 3200+ stall converter with 3-disc carbon clutch
Prior to the intake manifold and methanol, the car made right at 500 WHP on a superflow loaded dyno (that was also with 1-3/4" Pfadt headers and cats in the x-pipe).. should be making a bit more now but won't know for a few weeks.
Capture.PNG
Shown here is the issue I'm fighting - just after I lift off, my timing spikes very high. This moment, to me, seems like my best chance of getting flames, if I could get my timing to go/remain low here. I've searched through the tune and just cannot seem to find anything to change this behavior. The actual entry/exit of DFCO seems to be working the way I want it, but this issue seems separate from that.
I've attached the full log and the tune that was loaded when the log was done.
11-19-19-02.hpl
NJE TS 012.hpt
Thanks in advance! I also welcome any other feedback!
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Tuner in Training