hi all. first time posting here. been lurking a bit.
i have a 3100 lumina, 1999 that ive been tuning on hptuners with a aem wideband and all that. i had my fueling and modes all dialed in good, and then installed 36 lb injectors from a L67 and am currently working on a retune for those before i boost the motor. i have some questions however regarding fueling and all.. perhaps someone can help.
first off, i noticed that the P04 OS i have right off has alot of missing parameters, so i created and add the ones that was missing via the tiny tuners database, and TunerPRo for the .xdf's i need.
with this capability in hand, i obviously peaked in on what my luminas 99-00 SC counterpart would be hiding.... similar stuff. notably i want to say i saw the p04 has a map scale offset and linear setting which peaked my interest. so i start looking and learn obviously i can offset my own lumina's map scale and linear and probably run a 2 bar brick MAP .. no doubt. correct me if im wrong ....
heres my question for you lads.... how do you fuel above 140 kpa?? or time it above above .92 g/cyl? isnt 140kpa actually 5 psi? doesnt the 3800 s/c stock do 8?
the SC and n/a p04 ecm OS's only share one difference that i see. the S/c OS uses 0,10,20,30 - 140 kpa. the 3100 uses 30-140 kpa. ? what gives.
so my curiosity was peaked more. i browsed the forums here for guys running 3800 motors that posted datalogs so i could see how they behave in boost.
i find a datalog from a guy doing a pull in his car on E up to 11+ psi and he hits 190 kpa, 1.06 g/cyl, but his MAF meter only reaches like.. 10,750hz
the timing continues on at the last place it was at which is 22 degrees, and fueling never really drops off.
im a lil confused how that works since theres no map scale for that much. i know that in the p04 the VE is used for transient and maf is king, and i plan on boosting the lumina and controlling it with my maf meter.. blow thru.. but how can i be sure i wont like, run lean and explode past 140 kpa like the s/c does?
thanks guys.. i appreciate any insight.