My first good prom burn
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From: Medora Manitoba
I just noticed that the BLM value of 112 is for cell4 (there are 16 cells across the rev range and airflow range). This is interesting because I would expect that at idle you should be sittiing in cell0. To get up into cell4 you must be sucking a lot of air into the engine and hence a lot of fuel (is this something to do with the IAC or the throttle blade adjustment you spoke about?). The value of 112 shows that the ecm has leaned out the mixture due to a rich condition at idle. See the following link:
http://j-body.net/ECM_Tuning#BLM_.26_INT
http://j-body.net/ECM_Tuning#BLM_.26_INT
Le Mans Master
Joined: Aug 2000
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From: Australia
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
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From: Medora Manitoba
Drifting
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From: Perth Western Australia
St. Jude Donor '10
All I can get out of this is that your car is running. At least that is a good thing.
What are you trying to achieve with your tune(HP, toqrue, mileage)? How are you going about it? Is it better than it was with your stock chip?
What are you trying to achieve with your tune(HP, toqrue, mileage)? How are you going about it? Is it better than it was with your stock chip?
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From: Medora Manitoba
It is better than when it was (coughs) Carb in between cam swaps though
And yes I am happy its running and not dangerously rich or lean. I dont' think I have done too bad for a weekend emulation, programing and dataloggin
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From: Medora Manitoba
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Drifting
Joined: Nov 2009
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From: Perth Western Australia
St. Jude Donor '10
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From: Medora Manitoba
The stock chip would not run in my motor. It was excessively rich and it would not idle. I have adjusted the lower (below 1200 rpm) ve tables to get it started, put more advance in the lower spark tables and put more in the VE tables in the midrange to compensate for the cams higher volume efficiency in the midrange. Base idle is at 8 deg btdc with est disconnected. Throttle blades have been adjusted at idle to allow for the cam as the IAC was maxing out in drive and when cold due to the cam pulling more air in.
I have also been emulating and datalogging and fine tuning the maps until my LC1 wideband gave me the figures I wanted and the engine and plugs seemed happy.
The hardest part was everytime I pulled more out of the lower VE tables the AFR still did not change and the engine kept running very rich. I am now at a point where it seems happy athough it will probably need more fine tuning.
I have also been emulating and datalogging and fine tuning the maps until my LC1 wideband gave me the figures I wanted and the engine and plugs seemed happy.
The hardest part was everytime I pulled more out of the lower VE tables the AFR still did not change and the engine kept running very rich. I am now at a point where it seems happy athough it will probably need more fine tuning.
Last edited by (vette)master; Jul 27, 2010 at 11:54 AM.
Le Mans Master
Joined: Aug 2000
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From: Australia
The tuning learning curve is steep but it is very satisfying when you can do some adjustments and the numbers come out right 
More so when you are in the tuning back blocks of the world like us and don't have a local expert in the same country , let alone town like the good 'ole boys
More so when you are in the tuning back blocks of the world like us and don't have a local expert in the same country , let alone town like the good 'ole boys
Drifting
Joined: Nov 2009
Posts: 1,341
Likes: 2
From: Perth Western Australia
St. Jude Donor '10
The stock chip would not run in my motor. It was excessively rich and it would not idle. I have adjusted the lower (below 1200 rpm) ve tables to get it started, put more advance in the lower spark tables and put more in the VE tables in the midrange to compensate for the cams higher volume efficiency in the midrange. Base idle is at 8 deg btdc with est disconnected. Throttle blades have been adjusted at idle to allow for the cam as the IAC was maxing out in drive and when cold due to the cam pulling more air in.
I have also been emulating and datalogging and fine tuning the maps until my LC1 wideband gave me the figures I wanted and the engine and plugs seemed happy.
The hardest part was everytime I pulled more out of the lower VE tables the AFR still did not change and the engine kept running very rich. I am now at a point where it seems happy athough it will probably need more fine tuning.
I have also been emulating and datalogging and fine tuning the maps until my LC1 wideband gave me the figures I wanted and the engine and plugs seemed happy.
The hardest part was everytime I pulled more out of the lower VE tables the AFR still did not change and the engine kept running very rich. I am now at a point where it seems happy athough it will probably need more fine tuning.
Anyway my Moates tuning gear has just arrived from the States(without any instructions) so my journey begins. The main difference to you is my engine is running beautifully already with the current mods (minor as they may be).
Last edited by Lemme; Jul 28, 2010 at 06:56 AM.
Drifting
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From: Perth Western Australia
St. Jude Donor '10
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From: Medora Manitoba
http://www.innovatemotorsports.com/ There are 2 types and I have the type that is installed with a Gauge that sits in a pod. The LC1 also has an output that I can use to datalogg wideband AFR outputs and has a narrowband output to my ECM.
Last edited by (vette)master; Jul 28, 2010 at 08:21 AM.
