Knock.. knock!!! spark retards

[A.H.Y]

Hello guys,

I am trying to tune a 6.4 Hemi Chrysler with bolt ons
The problem is that I am having spark retards for every ST Knock (1ST = 1 degree spark retards)

What is the safest way to eliminate the affect of ST on my spark??

I was trying to reduce my WOT spark base table, but in fact I am reducing my performance as well.

Thank you,

[MarkTucker]

Hello guys,

I am trying to tune a 6.4 Hemi Chrysler with bolt ons
The problem is that I am having spark retards for every ST Knock (1ST = 1 degree spark retards)

What is the safest way to eliminate the affect of ST on my spark??

I was trying to reduce my WOT spark base table, but in fact I am reducing my performance as well.

Thank you,

That little of knock retard. You should be able to clean that up with fueling.

I don't see what you are commanding, but you can put a wideband on it. And check afr vs commanded.

You can even just throw a little bit more fuel at it, like it is just to see if that takes care of it or not.

[A.H.Y]

That little of knock retard. You should be able to clean that up with fueling.

I don't see what you are commanding, but you can put a wideband on it. And check afr vs commanded.

You can even just throw a little bit more fuel at it, like it is just to see if that takes care of it or not.

Thanx Mark for the reply,

Sorry, I attached the wrong log above, here is what I want to show in the attachments below

As you see, my afr is going under 11.4 in some points, however st knocks still there
I tried to reduce my WOT spark to clean up those knocks, but I end up with almost stock performans tune.
So far I am still not pleased with how my tune works, I tried everything. And finally I am thinking if somehow I could safely get red of the effect of ST knocks that killing my spark (even if they are occurring), since they are ST not LT knocks.

Any ideas?

I am thinking of going to:
Engin>> spark>retard> short term knock
and set all the max retard table to 1

[MarkTucker]

Is .5* of knock all that ever pulls?
11.5 afr is plenty rich.

[A.H.Y]

Is .5* of knock all that ever pulls?
11.5 afr is plenty rich.

I was having up to 3* ST knock that pulled 3* of my timing, then I started to take off some timing to clean this up
Finally, I end up with this situation and I am feeling that there is something wrong, specially when I there is not so much power gaining through the whole process

Note: I notice 0.5-1 ST knock pull 1* of timing, is that normal? shouldn't be the LT knock that pull the timing?

[06300CSRT8]

I have always been of the sense that the 6.4L factory tune is pretty aggressive to begin with and doesn't leave much HP on the table. I am not so surprised you need to run near stock spark to eliminate ST knock. Given it is not a boosted setup but just a bolt on factory engine, I would say you should just live with the .5 to 1 degree of ST knock. If it were boosted I would say absolutely not, needs zero knock. Attaching your actual tune and log would be worlds more helpful to us trying to help you, screen shots don't do much.

[uarperformance]

Just for giggles A.H.Y. does it have a catch can on it? They still puddle oil in intake manifolds and cause knock. I have also seen knock when they are too rich also. 12.2 to 12.4 seems to work well and as always its what the engine likes

[2therock]

If the KR is repeating in the same cells, is going to the cells in the spark table and reducing those cells by that amount a good practice? And if it leaves pits and valleys would smoothing be good?