I have an 07 Ultra with Rinehart true duals and a SEAC running a PC3 I have tuned this bike with a Daytona sensors twin scan plus wego to 13 2 afr on an advanced map when I run a data log I see that the knock sensors are removing up to eight degrees of timing from 250 to 3000 rpm in the 10 to 40 percent tp If I back timing out of the PC3 map in this area it does not help&nbsp\\;\\\\\\; and the spikes still show up I loaded a richer map and it helped some but again if I remove timing I does not stop the knock senssors from removing more timing Is this normal or what can I do to get a flat line with no knock retard any help would be appreciated as I am at my wits end with this thing I cannot hear any pinging but these 07s are so noisy that I can not really tell

also when I look at the data log the spikes are not related to quick throttle blips but seem to&nbsp\\; appear as the map sensor position rises

I also enabled the accelerator pump feature.

 

Your PCIII is working off TP and RPM and the ECM timing table is working off kPa and RPM they don't match up

 

ok Doc so what do I do now

 

Good question.&nbsp\\; Are the frt and rear cylinders spiking at the same time? Seems to me if it's pulling out 8 degrees you will be able to hear that.

 

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You would think so that is why this is so frustrating look at the attached pic and you will see what i mean

 

Sorry I'm 59 now and I can't read that graph

 

That may be better I sent it to you via email also Doc

 

Update, I was able to eliminate almost all timing spikes by removing 3 degrees over a broader range on the map. It seemed that if I took out timing in just the areas affected, once I accelerated past those areas the spark map went back to zero, and cause a jolt to the system causing a spike. With -3 in all cells from 5-80 tp and 1000 to 4500 rpm I only have an ocasional knock sensor activation of -2 degrees or so. That mainly happens below 2400 rpm when lugging the engine, which I try not to do.&nbsp\\;

 

Does the power commander modify the timing out of the ecm or override it?

 

I believe it overrides it by manipulating the settings comming out of the ECM. I had to cover a broader area of the map to get it to take out what I needed.