How much timing advance should I run?
#1
How much timing advance should I run?
Not sure what I should be setting my spark timing to?
The motor is a replica of a Haxby "EFI for everyone"
Gen 6 454 Mag
Standard Iron heads with Inconel Valves
Holley Terminator TBi EFi on a Victor Jr intake
Eickert Alloy headers with dry to the tip tails
Bob Madara custom hydraulic roller cam and full valve train
I am tuning it in the boat with the Holley software on a laptop and despite the dry exhaust reversion kills O2 sensors for a living so my tuning windows are fairly small.
It sounds good but doesn't pull nearly as well as I hoped so I wonder if I am conservative on the tune
My target AFR is 12.2-12.5 at WOT
I have been using 32 degrees of timing and today tried advancing it out to 36 degrees, it seemed to run a little stronger but I am worried that may be way to much and I could do some damage?
The motor is a replica of a Haxby "EFI for everyone"
Gen 6 454 Mag
Standard Iron heads with Inconel Valves
Holley Terminator TBi EFi on a Victor Jr intake
Eickert Alloy headers with dry to the tip tails
Bob Madara custom hydraulic roller cam and full valve train
I am tuning it in the boat with the Holley software on a laptop and despite the dry exhaust reversion kills O2 sensors for a living so my tuning windows are fairly small.
It sounds good but doesn't pull nearly as well as I hoped so I wonder if I am conservative on the tune
My target AFR is 12.2-12.5 at WOT
I have been using 32 degrees of timing and today tried advancing it out to 36 degrees, it seemed to run a little stronger but I am worried that may be way to much and I could do some damage?
#2
Registered
34-36° will be fine.
#5
If you have dry exhaust and reversion is killing the O2 sensors you may have other problems. I've been running wet exhaust for over 6 years with continuous wideband use. May be something to look into.
#7
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Join Date: Jan 2009
Location: Metamora MI
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I am running lightning headers wet with the inner collector extended 2 inches and a 525 cam. My O2 sensor lasted 2 seasons. Put mufflers on this year and killed it within 5 minutes.
You can watch the knock channel on the Holley for any Pre ignition if you have a knock sensor hooked up
You can watch the knock channel on the Holley for any Pre ignition if you have a knock sensor hooked up