Pro Mouse

iTrader: (15)

With HP Tuners,What is the abbrevations 20kPa mean?will this effect Idle because by making the numbers through the coolants temps at 1.00 for Hot and Cold Start ,my surge seems to have been made very minimal.Does Idle work off of lets say 20kPa and 25kPa?Please Help

jimmyblue

iTrader: (11)

kPa is metric pressure. 100kPa is about atmospheric,
the conversion is kPa=PSI*6.89 (the HPTuners editor
has a unit conversion tool under the Tools menu).

I idle at 5.5PSI MAP when cold which would be about
38kPa. This will vary w/ accessory load, etc. and a
M6 car would probably have a little lower MAP at
idle since it doesn't have to run the tranny pump
either.

Pro Mouse

iTrader: (15)

GREAT Thanks Jimmy!!!! But this wont effect my WOT and performance will it?I am still learningI am an A4 car..
Thanks again....
Scott

jimmyblue

iTrader: (11)

The higher-MAP lines will definitely affect your
performance; the MAP=100 row (or some of the
lower ones, if you are at higher elevation) are
"contenders" in the WOT mixture decision - if
they are the fattest then they would get picked
over the PE value (making any PE changes
ineffective until PE gets fatter, and preventing
you from going leaner than that row's value by
PE tweaking).

Pro Mouse

iTrader: (15)

Ok my elevation is only 730 ft.The only Rows I have been playing with is up to 40 kPa ,I figure this shouldnt hurt my WOT?I just have been trying to get rid of this surge that comes on @ 105-150 cold start degrees ,and on hot start but goes away as soon as it goes closed loop (Stoich 14.628)But on both cold and Hot starts when I go into closed loop at 14.63 A/F Surge goes right away.I just dont get it.My Cam specs are 230-227-.571-.591 on 112.....Thanks

jimmyblue

iTrader: (11)

Yeah, under 40kPa will not affect the WOT or even
midband operation.

I haven't messed with the hot / cold start tables.
However I did notice something about a mixture
vs time feature. I had guessed this was all just
for cranking though, not running. I think you're
onto something here though, because on start
until O2s are considered to be lit and the ECT is
over closed loop threshold the open loop table is
where it's at. These tables might be the most
appropriate complement to the VE change; VE
table for the hot stability, and the cold/hot
start tables for any temperature-based fudging.

In fact if you wanted to truly tune open loop for
the non-WOT regions of operation, you could jack
the closed loop enable temp above your ECT max.

Pro Mouse

iTrader: (15)

Ok Cool ,Now by making the numbers in this table 1.00 is 14.63 A/F correct?Hear are my numbers that I have now.from -40 degrees up 284 degrees and starting at 20kPa and ending at 100kPa


1.67 1.48 1.33 1.27 1.21 1.14 1.06 1.04 1.08 1.07 1.05 1.03 1.02 1 1 1 1 1 1
1.62 1.48 1.33 1.27 1.21 1.14 1.07 1.05 1.08 1.07 1.06 1.04 1.03 1.01 1.01 1.01 1.01 1.01 1.01
1.62 1.5 1.33 1.27 1.21 1.14 1.07 1.05 1.13 1.11 1.07 1.05 1.04 1.02 1.02 1.02 1.02 1.02 1.02
1.62 1.52 1.34 1.27 1.21 1.15 1.08 1.07 1.14 1.14 1.07 1.05 1.04 1.02 1.02 1.02 1.02 1.02 1.02
1.65 1.54 1.35 1.28 1.22 1.16 1.1 1.09 1.14 1.14 1.08 1.06 1.04 1.03 1.03 1.03 1.03 1.03 1.03
1.67 1.56 1.37 1.29 1.23 1.17 1.15 1.12 1.14 1.14 1.08 1.06 1.04 1.04 1.04 1.04 1.04 1.04 1.04
1.67 1.56 1.39 1.32 1.26 1.2 1.17 1.15 1.14 1.14 1.08 1.06 1.06 1.06 1.06 1.06 1.06 1.06 1.06
1.67 1.58 1.41 1.33 1.27 1.21 1.19 1.16 1.14 1.14 1.08 1.06 1.06 1.06 1.06 1.06 1.06 1.06 1.06
1.69 1.58 1.42 1.34 1.28 1.24 1.21 1.18 1.14 1.14 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08 1.08
1.69 1.6 1.44 1.35 1.29 1.25 1.23 1.2 1.15 1.14 1.09 1.09 1.09 1.09 1.09 1.09 1.09 1.09 1.09
1.72 1.62 1.46 1.38 1.32 1.28 1.25 1.23 1.18 1.14 1.11 1.11 1.11 1.11 1.11 1.11 1.11 1.11 1.11
1.72 1.62 1.46 1.38 1.33 1.3 1.28 1.25 1.18 1.14 1.12 1.12 1.12 1.12 1.12 1.12 1.12 1.12 1.12
1.75 1.62 1.47 1.4 1.34 1.3 1.28 1.26 1.18 1.14 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13
1.75 1.62 1.47 1.4 1.34 1.3 1.28 1.26 1.18 1.14 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13
1.75 1.62 1.47 1.4 1.34 1.3 1.28 1.26 1.18 1.14 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13
1.75 1.62 1.47 1.4 1.34 1.3 1.28 1.26 1.18 1.14 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13
1.75 1.62 1.47 1.4 1.34 1.3 1.28 1.26 1.18 1.14 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13 1.13

If I take the the numbers from the coolant range and 1.00 that will make me 14.63A/F?
Thanks again...

Pro Mouse

iTrader: (15)

Shoot these numbers are jumbled ,they are a copy of my actual table...

jimmyblue

iTrader: (11)

Yes, a 1.00 entry -if selected- would put you to
a 14.6-14.7 -commanded- AFR (whatever the
stoich value entry it in that box). But, still do not
know the logic of when open loop is selected.

Pro Mouse

iTrader: (15)

It seems to be starting in open loop ,I guess,Because when it hit 150 degree's and the o2's start going it is closed loop ,right?

jimmyblue

iTrader: (11)

Yeah, except on mine it's 92F ECT across most of
the Closed Loop Enable ECT vs IAT table. That's one
of the open/closed loop enable terms, collect 'em all....

samz28

why would this ecu not simply take the value of xxx mvolt and consider the o2 sensor lit? Even archaic 80's cpu's would do this. if o2 sensor signal is strong enough OR ECT is met, then go to closed loop.

I would find it hard to believe that gm would not accept that as a standard protocol in helping cold start emissions. It only takes say 30 seconds to light an old krusty o2 sensor maybe 60 seconds in the winter, but will take more time than that to reach closed loop ECT temps no?

Maybe we should lower the ECT temps for closed loop and see what happens.

Pro Mouse

iTrader: (15)

Well mine is to 92 F across this board as well.What would happen if we lowered it to 60?