maf

on the ls1/99 c5 i see differences of up to 25 grams (about 10%) for up to 1 sec. between sae.maf and gm.maf, sae.maf usually being higher. which one to use?

(i never paid attention to this, as im usually runnind sd.)

edit: while were at it, what is gm.etctp? it seems to be lagging behind sae.tp quite a bit.

Use GM.MAF.

SAE.MAF is not quite the same as GM.MAF.

Post log showing GM.ETCTP and and GM.TP and SAE.TP, these 3 are each different.


For DBW use GM.ETCTP.

please remind me: what is dbw?

acronyms, bleh dbw as far as I know is Drive By Wire, electronic throttle.

thanks. have always been using sae.tp (99 c5) but gm.etctp is consistently lagging by about 0.05 sec (on an average). why use that? (it goes up to 100% vs. 99.6% for sae.tp, but i cant see how that would matter.)

from a log (stock tune): sae.maf 264, gm.maf 237, dyncylair 0.66, rpm 5957. should be 262g/s, so i guess sae.maf is closer. difference usually it not so large. another "extreme" point: 182/166 g/s. during a shift gm.maf seems to go higher (234/266. 9), however.

so what is this, a logging phenomenon, how so? same signal, right? (i was logging at 5 hz.)