LT Headers, now running rich where do I make adjustments?
09-22-2004, 06:40 PM
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LT Headers, now running rich where do I make adjustments? I added the QTP's to the car along with their y-pipe. I had the car dynoed this past saturday and the A/F was around 12.2 - 12.5 the whole time. The car made 333 hp and 338 ft lbs and it was about 80 degrees in the shop.
Where should I make changes in HP Tuners?
How should I adjust the tune to lean it out just a bit to run a little nicer mixture?
Thanks.
Where should I make changes in HP Tuners?
How should I adjust the tune to lean it out just a bit to run a little nicer mixture?
Thanks.
09-23-2004, 12:16 PM
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You probably want to scale that PE table by a pretty
small amount and (like x 0.96) but look at the wideband
profile vs RPM and you may want a little bit of "taper"
on the table - like I have a slight rising rate w/ RPM
to obtain a flat AFR vs RPM profile, compensating for
fuel fade I figure.
Then, you have to go in the Open Loop Fuel/Air vs MAP
vs RPM and make sure that the values in the MAP rows
corresponding to WOT, at your elevation, are the same
or slightly less than what's in your PE vs RPM "strip".
This ensures that the PE vs RPM value is what you get.
Might as well keep the OLFA close-coupled to PE just
so you don't see funny ping / KR during any PE delay /
ramp times (though I would just kill the delay and put
the rate to 1.0 if you haven't already).
small amount and (like x 0.96) but look at the wideband
profile vs RPM and you may want a little bit of "taper"
on the table - like I have a slight rising rate w/ RPM
to obtain a flat AFR vs RPM profile, compensating for
fuel fade I figure.
Then, you have to go in the Open Loop Fuel/Air vs MAP
vs RPM and make sure that the values in the MAP rows
corresponding to WOT, at your elevation, are the same
or slightly less than what's in your PE vs RPM "strip".
This ensures that the PE vs RPM value is what you get.
Might as well keep the OLFA close-coupled to PE just
so you don't see funny ping / KR during any PE delay /
ramp times (though I would just kill the delay and put
the rate to 1.0 if you haven't already).
09-23-2004, 05:33 PM
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I don't have to touch the VE table at all?
This I get and I'll make that change.
I don't quite follow you here, all I see for Open loop is "Open Loop F/A vs. Coolant Temp. vs. MAP" nothing for RPM.
What's OLFA?
When talking about KR with the delay and the rate, do you mean the attack and recovery rates?
Sorry for all the questions, I'm just trying to understand all this.
Thanks.
Originally Posted by jimmyblue
You probably want to scale that PE table by a pretty
small amount and (like x 0.96) but look at the wideband
profile vs RPM and you may want a little bit of "taper"
on the table - like I have a slight rising rate w/ RPM
to obtain a flat AFR vs RPM profile, compensating for
fuel fade I figure.
small amount and (like x 0.96) but look at the wideband
profile vs RPM and you may want a little bit of "taper"
on the table - like I have a slight rising rate w/ RPM
to obtain a flat AFR vs RPM profile, compensating for
fuel fade I figure.
Originally Posted by jimmyblue
Then, you have to go in the Open Loop Fuel/Air vs MAP
vs RPM and make sure that the values in the MAP rows
corresponding to WOT, at your elevation, are the same
or slightly less than what's in your PE vs RPM "strip".
This ensures that the PE vs RPM value is what you get.
vs RPM and make sure that the values in the MAP rows
corresponding to WOT, at your elevation, are the same
or slightly less than what's in your PE vs RPM "strip".
This ensures that the PE vs RPM value is what you get.
Originally Posted by jimmyblue
Might as well keep the OLFA close-coupled to PE just
so you don't see funny ping / KR during any PE delay /
ramp times (though I would just kill the delay and put
the rate to 1.0 if you haven't already).
so you don't see funny ping / KR during any PE delay /
ramp times (though I would just kill the delay and put
the rate to 1.0 if you haven't already).
When talking about KR with the delay and the rate, do you mean the attack and recovery rates?
Sorry for all the questions, I'm just trying to understand all this.
Thanks.
09-25-2004, 04:42 PM
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Open Loop Fuel/Air (OLFA) indexes off pressure like
PE indexes off RPM. The fatter one at any (MAP, RPM)
wins out. Look at the columns about your normal temp
and make sure the MAP>80 rows are in line with what
you have in the PE table.
Delay/rate I mean the PE mode delay RPM should be
fairly low so you start seeing it soon enough to suppress
KR, and also the PE enrichment rate should be high (1.0).
Some trucks have funny low rates so the PE comes on
slow, and this can make knock under sudden load with
no correspondingly sudden fuel.
KR attack/decay rates I have at 0.1 (attack) and 0.2
(decay) which seems to work well enough. Keeps from
jumping up to 4 degrees on every little hiccup and goes
away quick if it was just one.
PE indexes off RPM. The fatter one at any (MAP, RPM)
wins out. Look at the columns about your normal temp
and make sure the MAP>80 rows are in line with what
you have in the PE table.
Delay/rate I mean the PE mode delay RPM should be
fairly low so you start seeing it soon enough to suppress
KR, and also the PE enrichment rate should be high (1.0).
Some trucks have funny low rates so the PE comes on
slow, and this can make knock under sudden load with
no correspondingly sudden fuel.
KR attack/decay rates I have at 0.1 (attack) and 0.2
(decay) which seems to work well enough. Keeps from
jumping up to 4 degrees on every little hiccup and goes
away quick if it was just one.
09-26-2004, 01:37 PM
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Originally Posted by jimmyblue
Open Loop Fuel/Air (OLFA) indexes off pressure like
PE indexes off RPM. The fatter one at any (MAP, RPM)
wins out. Look at the columns about your normal temp
and make sure the MAP>80 rows are in line with what
you have in the PE table.
Delay/rate I mean the PE mode delay RPM should be
fairly low so you start seeing it soon enough to suppress
KR, and also the PE enrichment rate should be high (1.0).
Some trucks have funny low rates so the PE comes on
slow, and this can make knock under sudden load with
no correspondingly sudden fuel.
KR attack/decay rates I have at 0.1 (attack) and 0.2
(decay) which seems to work well enough. Keeps from
jumping up to 4 degrees on every little hiccup and goes
away quick if it was just one.
PE indexes off RPM. The fatter one at any (MAP, RPM)
wins out. Look at the columns about your normal temp
and make sure the MAP>80 rows are in line with what
you have in the PE table.
Delay/rate I mean the PE mode delay RPM should be
fairly low so you start seeing it soon enough to suppress
KR, and also the PE enrichment rate should be high (1.0).
Some trucks have funny low rates so the PE comes on
slow, and this can make knock under sudden load with
no correspondingly sudden fuel.
KR attack/decay rates I have at 0.1 (attack) and 0.2
(decay) which seems to work well enough. Keeps from
jumping up to 4 degrees on every little hiccup and goes
away quick if it was just one.