Air Fuel Ratio
- Thread starter respivey
- Start date
Professer i must be loseing my mind in my old age as i was going the wrong direction on my tune up. Not sure what i was thinking.I felt like my funny car should be running way lean and it looks like that is what is happening. I am useing a K&N air fuel ratio meter for now but will probably go to a LM-1. wide band. I am trying to get a base line running the car in neutral and doing some 60 footers in my drive way.
It is going to be hard to get it lined out in neutral as it will not be under a load. The good long pulls in the higher gears seem to help the most. My wideband and logger has helped quite a bit. If nothing else just telling me what I was doing with the throttle and clutch.
Johnnycheese
Registered
lm-1
Johnny or someone else can correct me if I am wrong.
I originally looked at the Innovative LM-1 when I bought my logger.
First what do you want to monitor? I wanted to tune all across my power band so I absolutely needed to monitor RPM, Throttle position, and A/F
The LM-1 has no direct external connections to monitor other sensors, but it will record the data from other innovative devices. You will want an LM-2 or LM-3 with it. The LM-2 has a rpm converter and 4 additional 5volt inputs. The LM3 has the rpm converter, boost input, accelerometer, EGT, and injector duty cycle built in and the inputs can be used to monitor 5v inputs.
The LM-1 is more of a portable unit that some of the other offerings by Innovative. It is limited to 6 total channels. It must interface directly with the computer to extract information by serial connection. It holds about <s>17 minutes </s> 44 minutes of data.
I decided to go with the DL-32 it will monitor 32 channels, (5 directly) It does everything the LM-3 (above) does but adds logging and a few other features. It adds vacuum, an 5volt power supply for your sensors if needed and 3 output relays (that I don’t think are accessible yet)
By itself the DL-32 will not monitor A/F, it requires an input from a wideband kit. They make the LC-1 which is basically the LM-1 without the logging and readout capabilities. The DL-32 records to a SD data card (you may have the same in your digital camera) you can pull the card and insert it into a reader on you PC without having to connect wires to the car. The card will hold about 15 minute of data per MB of card size. The included 512mb card will hold days of data and has a very fast transfer rate.
So what does all of that mean? You need to decide what your long term goals are.
Do you want to monitor the Gear position sensor? This in combination with the speedometer output could be calculated to look for clutch slippage. Did you launch I the right gear or shift twice. It could take out some of the unknowns.
You can put a hall effect sensor on the clutch to look for slippage directly.
How is the chassis working? You can connect sensors to see how the front is lifting and the rear is squatting. Going to add more power with a dry shot, how does the injector duty look? How many G’s is it pulling and where is it dropping? Want to trigger a relay in the future based on data? X seconds from 100% throttle activated NOS etc. Autoshift output for air shifter, disable autoshift after reaching certain gear etc..
You have to decide what is best for your needs and budget. I kept thinking of possibilities and other uses. I felt I might be limiting myself in the future if I bought the LM-1 combo. I ended up with the DL-32, LC-1, XD-16 (basically a programmable gauge and control unit). I can record 6 channels, display 1 real time, and add channels in groups of 4 for about $100.
I originally looked at the Innovative LM-1 when I bought my logger.
First what do you want to monitor? I wanted to tune all across my power band so I absolutely needed to monitor RPM, Throttle position, and A/F
The LM-1 has no direct external connections to monitor other sensors, but it will record the data from other innovative devices. You will want an LM-2 or LM-3 with it. The LM-2 has a rpm converter and 4 additional 5volt inputs. The LM3 has the rpm converter, boost input, accelerometer, EGT, and injector duty cycle built in and the inputs can be used to monitor 5v inputs.
The LM-1 is more of a portable unit that some of the other offerings by Innovative. It is limited to 6 total channels. It must interface directly with the computer to extract information by serial connection. It holds about <s>17 minutes </s> 44 minutes of data.
I decided to go with the DL-32 it will monitor 32 channels, (5 directly) It does everything the LM-3 (above) does but adds logging and a few other features. It adds vacuum, an 5volt power supply for your sensors if needed and 3 output relays (that I don’t think are accessible yet)
By itself the DL-32 will not monitor A/F, it requires an input from a wideband kit. They make the LC-1 which is basically the LM-1 without the logging and readout capabilities. The DL-32 records to a SD data card (you may have the same in your digital camera) you can pull the card and insert it into a reader on you PC without having to connect wires to the car. The card will hold about 15 minute of data per MB of card size. The included 512mb card will hold days of data and has a very fast transfer rate.
So what does all of that mean? You need to decide what your long term goals are.
Do you want to monitor the Gear position sensor? This in combination with the speedometer output could be calculated to look for clutch slippage. Did you launch I the right gear or shift twice. It could take out some of the unknowns.
You can put a hall effect sensor on the clutch to look for slippage directly.
How is the chassis working? You can connect sensors to see how the front is lifting and the rear is squatting. Going to add more power with a dry shot, how does the injector duty look? How many G’s is it pulling and where is it dropping? Want to trigger a relay in the future based on data? X seconds from 100% throttle activated NOS etc. Autoshift output for air shifter, disable autoshift after reaching certain gear etc..
You have to decide what is best for your needs and budget. I kept thinking of possibilities and other uses. I felt I might be limiting myself in the future if I bought the LM-1 combo. I ended up with the DL-32, LC-1, XD-16 (basically a programmable gauge and control unit). I can record 6 channels, display 1 real time, and add channels in groups of 4 for about $100.
Professor : If i go with the LM-1 is it expandable enough for my application. Again you sent some great info that i have not considered. I am concerned about getting the car down the track this year. Next year i will probably go with a turbo or nitrous motor.They have let the Harley Davidson S&S motors into my class, i think they are running about 2400 cc. I dont care what it cost i am not letting a Harley Davidson out run a Busa.
I just didn’t want you to get something that will not fill your needs if you upgrade. Get a good count of what you are going to log if you go turbo, as I think you may run out of channels. A/F, boost, Fuel rail pressure, injector dwell, RPM, TPS would be the minimum I would want to monitor in a boosted app. That does not leave anything to monitor clutch slippage or other data.
Just got the LM-1 up and running. Have made a few pulls in neutral the A/F at higher RPMs is about 16.6. Any idea what the A/F will do under a load condition.I have the power commander as rich as it will go. Almost burned the car down in the driveway, the oil line going to the cooler split putting oil on the header nice fire. Is there a way to do away with the cooler?
Johnnycheese
Registered
How many times to I have to say F*** neutral. you have to have it in a gear so the nueatral map isn't running
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