Well just sort of an update and some things that have irritated me on the 7th tuning.
I ended up trying a WOT run with O/D off in 4th gear starting at about 50mph. I Dont know if I leaned out or was too rich but as I was gaining speed and RPMs my truck all the sudden lost power and I slowed down all while my foot was on the gas. I don't think it was all the way down but it was close. I was not able to get an eye on the wideband or OBD tool, it was totally unexpected.
So I scrapped my current maps and went back to the stock maps but kept the Over Pressure at 1psi. this is with the stock pulley....now my AFRs are in the mid 13s on low RPM boosting and drops as RPMs go up and going into open loop. I also activated ECT PWR which helps kick out of O/D to avoid the HG/LR ping. With the stock maps I don't get any audible ping unless im lugging up a incline in O/D too long so ill avoid it for now.
Now, if you read the tuning guide it explains that a lean top end lowers timing advance which results in a less chance of ping. So this may have helped me in the ping area, since I leaned out, but im not 100% sure. I'm a bit apprehensive to go WOT again because I don't want to lean out again and, for now, a less aggressive timing curve is less stressful and therefore a good thing for me. I don't ever find the need to have my RPMs way up anyway. Especially since I need to do the Transgo valve body kit and install my Trans cooler. When the trans is safe ill have more fun with that.
Now, what i find irritating and really confusing about this entire process that the AIC tuning guide is not really clear about a few things.
this is directly from the AIC tune guide.
"While the ECU is still in CLOSED LOOP mode you
may see the fuel trims moving very positive in an attempted to maintain the
CLOSED LOOP fuel mixture the ECU is programmed to maintain. If you see this
start adding fuel with injector control map to attempt to move those positive fuel
trims back toward ZERO."
Sounds simple enough right? until it tells you that you cant tune closed loop with the AIC alone. And that you're going to need a $250 o2 or AFR calibrator. It would have been fantastic if this was mentioned PRIOR to purchasing a $900 kit. But reading more and gathering information from many different threads and forums I've come to understand that my AIC does have a closed loop calibrator somewhat similar to the devise stated above. Its just less controllable than a separate unit. How much more im not sure but i do believe that the AFR calibrator has its own map.
What I find very confusing is the fact that it seems as though you simply add fuel with the injector when you see the trims going too positive. Well apparently it ain't so.
Here's (#17) a quote from URD explaining that you don't cancel fuel trims with the 7th injector. So which is it? what am i missing?
now on to timing.
The AIC tune guide explains that when you retard timing in the map you should see those values reflected on the scan tool. I have not been able to replicate this. In fact, talking with split second, you wont see any change in the timing on the scan tool with changes on the map. weird.
Now, I did not record stock timing so i guess I really don't know where my timing should be. So, Like others all I can do is tune the ping out. But when I really don't understand something I work at it until i get it.
My timing is
15 idle
mostly 20 in vaccum
14.5-17 in 4th gear 1-7psi
18-21 in O/D lugging up hills in boost
Im fully expecting to watch it all drop and get more ping when it gets 30-40 degrees hotter.
Considerations
Im wondering how much of this ping, if any at all, is due to clogged injectors or carbon on the pistons. I noticed that when I do ping In O/D i have to ride it for a bit to get any ping, at that point it does seem to come from one side of the engine. If it is in one or a few cylinders it must be that I've run into detonation territory from either a clogged injector or stubborn carbon buildup. Considerong this only seems to happen in O/D it must be that lugging the engine in O/D created much more heat. even at low RPMs. but it could also all be in timing, im not expert.
I did however get the Motor vac Carbon clean service done. I suppose that a injector or two could be too shitty to fix or carbon was too stubborn to clean chemically. I wonder if anyone with the S/C has gone though the trouble to manually clean cylinders or replace injectors to find improvements.
I had always planned on adding water/meth injection. At first i thought I could add the SNOW stage 1 kit with the smallest nozzle and spray starting at 1psi, then the 7th would help with timing and and extra fuel needed. Now im not so sure. I was told that spraying at 1psi is too low and i would dflood the engine. I looked at the Aquamist and it almost looks at though it would completely replace the 7th. Itas pricey for sure and im not entirely sure how it works or how to tune it but if anybody has anything to say about their controller or know any forum members with that kit id like to hear it. It could very well be overkill for a S/C pushing 11psi (with the 2.1 pulley hopefully someday)
Speedy, I know you run a Devils Own with some extra parts but what PSI do you have your running and do you have any kind of Water/Meth controller?