Just learning, first post here.
This is for a 2006 Mustang GT with a Rousch m91 supercharger/intercooler. 1/4 mile usage. Car runs fantastic, it has a tune to slow it down to run in the 12.90 class.
Every once in awhile the car during a race day will run slower fro no apparent reason, low 13's, with same 60 ft times. We have been blaming this on the density altitude, which we keep track of on each run. But, now that
I am attempting to be more factual about modern car EFI and tunes, this doesn't seem like it can be the case. My thought process is this. This is a MAF based system, which means the signal from the MAF includes effects of any temperature or density changes, i.e. it is measuring the actual mass of air prior to SC. So, this car should not be affected by changes in DA. Correct?
Second concept I'm unsure of. He's making the pass at WOT, which means an open loop status. Are the numbers in this table set or is this table a "learned" set of figures? It seems if we re-flash the tune in between rounds, that the car will run the number and be more consistent. Is this correct?
Thank you, I'm sure it's more complicated than what I have stated, but appreciate your comments and further points of study.