WinALDL
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Joined: Jul 2013
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From: Spring Valley California
WinALDL
Many have posted the usefulness of the WinALDL software to trend and diagnose issues with the 82 corvette. Well, I downloaded the software, purchased the billion dollar cable, opened the program and (well it sure looks nice). I'm getting data that's not the problem, the problem is........now that I have the data, what can I compare it to? For instance, I have learned what the TPS voltage should be by reading in the forums, and the data I'm seeing shows I have the correct voltage there. But I have data in many other columns of the program but don't know if its good data or if the data I'm seeing is bad because I don't know what data should be there for my year car (If it were new)? Nothing to compare what I'm collecting to what I should be shooting for? 
Instructor
Joined: Jul 2009
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I played with my 82 tuning for a while, didnt get very far but in those days I got a lot of info from the Crossfire Injection vault, now hosted as http://www.crossfireinjection.net/index.htm
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Sensor values for OBD 1 systems are not fundamentally unique to the Corvette. Your best source for target values would be to buy a shop manual for your car. You are otherwise in for a lot of Internet searching as you try to interpret mysterious data. But a good education on OBD systems generally pays off since sensor-controlled powertrains are not going away and the more you understand how sensors work, how they work together and how to interpret sensor outputs, the better off you will be in the long run.
Safety Car
Joined: Mar 2007
Posts: 3,652
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From: Bridgewater nj
What info are you retrieving and is it in real time or recorded?
I would say your main areas are you:
- O2 sensor reading
-temp
-timing advance curve
-injector duty cycle
Timing and air/fuel ratio will be your biggest gains in power. Everything else is for drivability issues.
The TPS is usually set and forget it but you can manipulate it a little for increased or reduction in fuel throughout the range.
My CFI is a powerful torque monster (for a low compression 350)and my only complaint is the drastic power drop after 4500 rpm
I do run the stage I Hypetec chip/prom that really changed the entire engine response for the better!!! The best $139 I ever spent but it still drops off after 4500- maybe 5000 on a good day but my motor has well over 100k for miles and it's all original.
I would say your main areas are you:
- O2 sensor reading
-temp
-timing advance curve
-injector duty cycle
Timing and air/fuel ratio will be your biggest gains in power. Everything else is for drivability issues.
The TPS is usually set and forget it but you can manipulate it a little for increased or reduction in fuel throughout the range.
My CFI is a powerful torque monster (for a low compression 350)and my only complaint is the drastic power drop after 4500 rpm
I do run the stage I Hypetec chip/prom that really changed the entire engine response for the better!!! The best $139 I ever spent but it still drops off after 4500- maybe 5000 on a good day but my motor has well over 100k for miles and it's all original.
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Joined: Jul 2013
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From: Spring Valley California
The info I am looking at currently is real time. Regarding the info that you stated is of importance, what are the optimum values for those areas, not what I'm seeing but what they should be.
Race Director
Joined: Apr 2007
Posts: 11,150
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From: South Western Ontario
There are no specific values that it should read. The data varies with engine rpm land load.
Generally speaking, the O2 sensor voltage should fluctuate above and below 0.5V. The older GM stuff had BLM or fuel trim values. These center at 128 and ideally shouldn't stray far from there. If it goes lower, the system is leaning out the fuel and if it goes higher the system is adding fuel.
Why don't you add some screen shots of the stuff in question. I don't have WinALDL or an 82 but I have used WinALDL in the past.
Generally speaking, the O2 sensor voltage should fluctuate above and below 0.5V. The older GM stuff had BLM or fuel trim values. These center at 128 and ideally shouldn't stray far from there. If it goes lower, the system is leaning out the fuel and if it goes higher the system is adding fuel.
Why don't you add some screen shots of the stuff in question. I don't have WinALDL or an 82 but I have used WinALDL in the past.
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Safety Car
Joined: Mar 2007
Posts: 3,652
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From: Bridgewater nj
Are you seeing voltage readings of your sensors or are you getting info in percentages and degrees?
For example;
The TPS will be in % from 0% to WOT 100%
The temperature will be in in degrees
The O2 will be in an air fuel ratio between 12.00-14.7
If your just seeing the milivolts and ohms? Things just got difficult and you'll need to go through all the testing procedures for each gauge to get a ballpark reading.
Most manuals have the TPS test and O2 but I'm sure the numbers are jumping around like crazy.
For example;
The TPS will be in % from 0% to WOT 100%
The temperature will be in in degrees
The O2 will be in an air fuel ratio between 12.00-14.7
If your just seeing the milivolts and ohms? Things just got difficult and you'll need to go through all the testing procedures for each gauge to get a ballpark reading.
Most manuals have the TPS test and O2 but I'm sure the numbers are jumping around like crazy.
Instructor
Joined: Jul 2009
Posts: 155
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For my 82 Vette I also upgraded the ECM and got a HAM and got Tunerpro RT. It is mind bloggling if like me you were born in the 60's.
http://www.tunerpro.net/
Good Luck!
http://www.tunerpro.net/
Good Luck!
Thread Starter
Advanced
Joined: Jul 2013
Posts: 72
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From: Spring Valley California
There are no specific values that it should read. The data varies with engine rpm land load.
Generally speaking, the O2 sensor voltage should fluctuate above and below 0.5V. The older GM stuff had BLM or fuel trim values. These center at 128 and ideally shouldn't stray far from there. If it goes lower, the system is leaning out the fuel and if it goes higher the system is adding fuel.
Why don't you add some screen shots of the stuff in question. I don't have WinALDL or an 82 but I have used WinALDL in the past.
Generally speaking, the O2 sensor voltage should fluctuate above and below 0.5V. The older GM stuff had BLM or fuel trim values. These center at 128 and ideally shouldn't stray far from there. If it goes lower, the system is leaning out the fuel and if it goes higher the system is adding fuel.
Why don't you add some screen shots of the stuff in question. I don't have WinALDL or an 82 but I have used WinALDL in the past.
Thread Starter
Advanced
Joined: Jul 2013
Posts: 72
Likes: 0
From: Spring Valley California
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
The flag data, sensor data and error data are the most important. The only thing really odd is the battery voltage being 18.6V. After driving around a bit, see what the BLM tab shows in the table. The values should mostly be around 128 give or take a bit. The code 42 is set when you set the timing. You can disconnect the battery for a bit to clear it.