02sierraz71_5.3

iTrader: (2)

Has anyone delved into modifying the transient fueling params? With all the modifications to heads and intakes there has to be some change with the way fuel "puddles" and is consequently atomized or evaporated.

WS6FirebirdTA00

iTrader: (33)

seems way, way, way to complicated to start messing with that stuff, i would assume you would have to run test after test to get data and start long calculations to figure out the right combination.

02sierraz71_5.3

iTrader: (2)

I just like studying this stuff I doubt I would actually try and retune it, unless I found enough info on it to feel confident about it.

From what I understand it concerns how much fuel is left on the intake walls. I just wonder how it is controlled since fuelo obviously evaporates a a set rate and temp. How does it effect injectors?

CAT3

iTrader: (9)

I know some ppl have, whether they want to chime in? I would like to one day tweak those tables to maximize not only my tune, but for pure knowledge. I can see it being beneficial for smoothing out the pcm's functioning from idle, to PT, to WOT and return and generally just making the whole thing more efficient.

WS6FirebirdTA00

iTrader: (33)

o yeah i would like to knwo everything in there, so if you find something let me know, i have yet to get good info on this

02sierraz71_5.3

iTrader: (2)

It would be nice if those people would jump in there isnt a whole lot of info on the subject

WS6FirebirdTA00

iTrader: (33)

or some of the guys writing this tuning stuff. we learned some of this in thermodynamics class but not enough for me to tell you something i feel good about posting where people can read it ahha

02sierraz71_5.3

iTrader: (2)

heres some good reading its indepth and not easy though

http://www.delphi.com/pdf/techpapers/1999-01-0553.PDF

the tansient fueling is mainly concerned with emmissions during cold starts, I assume they used stock materials for testing as higher grade metals should heat and cool quicker. Like I have ferrea valves and would think they heat up alot quicker and cool quicker than stock valves.

Wonder the implications as calculations concern time
also valve events should have an impact also

WS6FirebirdTA00

iTrader: (33)

cool ill try to read on it, if i can make any sense that i can explain well ill post it. but we learned some stuff like this in class and it seems pretty cool and if you could calculate and thoroughly test we could make our cars a lot badder