Originally Posted by
MakesBadDecisions
I have read that about your setup and most of the time that is is how most of the cars end up working the best. But, when you introduce radical cams, as I assume with a blower your cam is not that rowdy, different intake manifolds, throttle bodies, etc. You cant just leave the VTrq, peak, and DD tables alone and you are forced to monkey around in the VTrq tables as things are now so far from stock.
I am using the MAXTrq as an example of not following the rules. With the E78 and the guide provided for that we were given the basic architecture of how this system works. If the MAXTrq, in my case, does not limit things then what other parts of the inner workings do we have wrong. I know things have progressed greatly since then but the similarities are there.
Since the truck was new I noticed the MAXTRQ was not limiting and I wrote it off as part of the truck OS that may not follow those rules, as the table for the truck is maxed out at 6042 from stock. Even stock it idled weird, had surging issue at times, stalled randomly all within the first 5k of owning. I did nothing but log for the first 5k as the 17' was different than the 14', just by enough there was a learning curve.
Like 32vape said, you sometimes have to lower torque in the VTrq tables to get idle spark up. Down side is sometimes it introduces flaring and other random weird stuff. Just my observations.
I am more so trying to understand what rules apply and don't apply when it comes the VTrq tables and how they work, or don't work, together.
Is there a true mathematical way to edit the VTrq tables with the tools we have within the software? Even add the tool like a dyno, which I have, is there still a way?
Which table is looked at for predicted or how are they weighted if looked at both?
How are the tables weighted out when producing your actual torque number, according to the scanner channel?
What does the external load table truly model and how does it affect things like commanded throttle opening and spark torque mangement?
I understand the spark is for immediate torque control as throttle is for long term control, but what controls them?
I really thought I had a solid grasp on this but these questions keep coming up as blindly changing things drives me nuts. This is all math and math should be used to make changes.