running RIIICH
Thread Starter
11 Second Club
iTrader: (8)
Joined: Mar 2007
Posts: 569
Likes: 3
From: Windsor, Ontario Canada
running RIIICH OKay just got my wideband in...and its running rich biiig time! Well I get around 250 KM per tank (55-60ish liters)
Okay Temp outside is 61*F today
Car temp was at 180ish
Car timed for N2O
IDLE...14.7:1ish
1500ish-1800 14.7-15.2:1
WOT...drops down to 10.1 then climbs to about 10.9:1 but then after I get off it is leans out to max on the gauge and wont read and the exhuast pops
How can i lean this sucker out a bit??
Jay
Anyways the chart i have in tuner cat (if this is the right one reads
Closed TPS spark advance
RPM Spark Degree
0 0.0
400 28.0
800 28.0
1200 30.0
1600 34.0
2000 34.0
2400 34.0
2800 35.0
3200 37.0
3600 37.0
4000 37.0
4400 37.0
4800 37.0
Mods....
355 LT1
speed pro pistons
Ported intake and heads
1.6 RRs
hooker 1 5/8 headers
3 inch all the way back
NO CATS
52MM BBK
hotcam
30#
aeromotive adjustable FPR
K&N
3000 Stall
Built 4L60e
MOSER 12 bolt 3.73s
Okay Temp outside is 61*F today
Car temp was at 180ish
Car timed for N2O
IDLE...14.7:1ish
1500ish-1800 14.7-15.2:1
WOT...drops down to 10.1 then climbs to about 10.9:1 but then after I get off it is leans out to max on the gauge and wont read and the exhuast pops
How can i lean this sucker out a bit??
Jay
Anyways the chart i have in tuner cat (if this is the right one reads
Closed TPS spark advance
RPM Spark Degree
0 0.0
400 28.0
800 28.0
1200 30.0
1600 34.0
2000 34.0
2400 34.0
2800 35.0
3200 37.0
3600 37.0
4000 37.0
4400 37.0
4800 37.0
Mods....
355 LT1
speed pro pistons
Ported intake and heads
1.6 RRs
hooker 1 5/8 headers
3 inch all the way back
NO CATS
52MM BBK
hotcam
30#
aeromotive adjustable FPR
K&N
3000 Stall
Built 4L60e
MOSER 12 bolt 3.73s
Thread Starter
11 Second Club
iTrader: (8)
Joined: Mar 2007
Posts: 569
Likes: 3
From: Windsor, Ontario Canada
Also i beleive i have a small exhaust leak just after my Y pipe....(wideband is installed at the end of the Y)
Jay
Assuming you have some way to correlate RPM with the wideband data, you want to modify the %change A/F Ratio at WOT vs RPM table.
Lower numbers result in a leaner mixture.
The generally accepted formula is:
AFR = 14.7 / (1 + (% change WOT vs coolant temp / 100) + (% change at WOT vs RPM/100))
The two %change variables are the values in the two PE tables (coolant temp and RPM). Using this formula with the stock numbers you can see that the targeted a/f on the stock tune is in the low 11s which is around what you were reading (within a margin of error).
You may also find the spreadsheets on this page useful:
http://para.noid.org/~lj/PCM%20Tutorial/PCMtutorial.htm
Lower numbers result in a leaner mixture.
The generally accepted formula is:
AFR = 14.7 / (1 + (% change WOT vs coolant temp / 100) + (% change at WOT vs RPM/100))
The two %change variables are the values in the two PE tables (coolant temp and RPM). Using this formula with the stock numbers you can see that the targeted a/f on the stock tune is in the low 11s which is around what you were reading (within a margin of error).
You may also find the spreadsheets on this page useful:
http://para.noid.org/~lj/PCM%20Tutorial/PCMtutorial.htm
Last edited by infinitebird; Jan 8, 2008 at 05:28 PM.
Thread Starter
11 Second Club
iTrader: (8)
Joined: Mar 2007
Posts: 569
Likes: 3
From: Windsor, Ontario Canada
Assuming you have some way to correlate RPM with the wideband data, you want to modify the %change A/F Ratio at WOT vs RPM table.
Lower numbers result in a leaner mixture.
The generally accepted formula is:
AFR = 14.7 / (1 + (% change WOT vs coolant temp / 100) + (% change at WOT vs RPM/100))
The two %change variables are the values in the two PE tables (coolant temp and RPM). Using this formula with the stock numbers you can see that the targeted a/f on the stock tune is in the low 11s which is around what you were reading (within a margin of error).
You may also find the spreadsheets on this page useful:
http://para.noid.org/~lj/PCM%20Tutorial/PCMtutorial.htm
Lower numbers result in a leaner mixture.
The generally accepted formula is:
AFR = 14.7 / (1 + (% change WOT vs coolant temp / 100) + (% change at WOT vs RPM/100))
The two %change variables are the values in the two PE tables (coolant temp and RPM). Using this formula with the stock numbers you can see that the targeted a/f on the stock tune is in the low 11s which is around what you were reading (within a margin of error).
You may also find the spreadsheets on this page useful:
http://para.noid.org/~lj/PCM%20Tutorial/PCMtutorial.htm
RPM %Change
400 4.7
800 4.7
1200 -0.8
1600 -0.8
2000 -0.8
2400 4.7
2800 4.7
3200 4.7
3600 4.7
4000 4.7
4400 3.1
4800 -0.4
5200 -3.9
5600 -7.8
6000 -7.8
6400 -7.8
6800 -7.8
Jay
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Thread Starter
11 Second Club
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Joined: Mar 2007
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From: Windsor, Ontario Canada
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