93 LT1 Vett. 6 spd, hot cam, trick flow heads, 355. I have downloaded VEMaster and can't figure out how to use it, did a search, not much help. Here is what I need to know;
1.When the VEMaster page starts up it asks for 4 different pieces of info. First is the ECM type, I think mine is DA2, anyone know for sure?
2.Next it asks for "logged data file", I assume this is a file logged from DataMaster right?
3.Next is "ECM file", I have no idea what that is??
4.Last is "logged file" I have no idea what that is either??
Any help would be greatly appreciated. Thanks

 

Da2 is the type for our 93. You need a long datamaster log file of you driving through different ranges and you need to dump your ecm file with a eprom reader.


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Da2 for vette.
http://tunercat.com/tnr_desc/ecm_sup.html


Readme file from vemaster

VEMaster
Download
8D/DA2/DA3 - v2.11 - 10/14/03

EE - v1.33 - 12/16/01


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Notes
8D: 90-91 Corvette, 90-92 Camaro/Firebird (L98)

DA2: 92-93 Corvette (LT1)

DA3: 93 Camaro/Firebird (LT1)

EE: 94-95 Corvette, Camaro/Firebird, Impala, and other LT1-based B-bodies

The 8D/DA2/DA3 VEMaster only supports the logging software Datamaster.

The info below applies to the older (EE) version of VEMaster, but the idea is still the same.

What it does
VEMaster is designed to improve the drivability of LT1-based GM vehicles that have been modified with a high-performance cam and/or cylinder heads. The program uses a log file created by the user driving the car under normal conditions. This log file must currently be made by using the commercial Datamaster software or the freely available Freescan. The program also requires a pcm image file created by Tunercat. LT1-Edit users can convert their .lt1 files to Tunercat .bin files using the TuneConv program.

How it does it
VEMaster parses the logged data file using only closed-loop, part-throttle data. The LT1 computer has 16 closed-loop fuel trim cells. Each of these cells contains 2 pairs of learns: a long-term left-and-right pair (a.k.a. BLM) and a short-term left-and-right pair (a.k.a. INT). For each VE cell in the VE tables, the program grabs the average BLM from the fuel trim cell the VE cell lies in, interpolating if necessary. The pcm bin file is modified, so be sure to make a backup copy before you run the program.

Recommendations for use
Since this program was designed to improve drivability and not top-end power, I recommend tuning no higher than the default setting of 3000 rpm. There are two reasons for this. One, any time you swap in a more radical cam for the stock cam, your VE will suffer at lower rpm's. However, at higher rpm's, the more radical cam will first equal, then exceed, the volumetric efficiency of the stock cam. At these higher rpm's, though, it is safe to assume one will be operating at W.O.T., and the fuel can more easily be controlled by adjusting the Power Enrichment table. Second, the fuel trim cells in stock form end at 2000 rpm. So from 2000 rpm on up, you only have that one set of learns. Presumably, most of the data (and driving) you will be doing will be closer to 2000 rpm than not. Therefore, the accumulated learns your car has in the 2000+ rpm cells will mostly be based upon data in the 2000-3000 rpm range, and thus should not be applied to higher rpms.

Supported platforms
VEMaster was developed using MS Visual C++ 6 under Windows 2000. It has been tested on Windows 2000, Windows NT 4, and Windows 98.

Reporting bugs
If you believe you have encountered a bug in the software please email me at jgeorger@attbi.com. Please include such information as the cpu, memory, and OS your computer is running, as well the datamaster/freescan file, the original and modified pcm image file, and any VEMaster log files.

Disclaimer
VEMaster software is freeware. It comes with no warrantly, explicit or implied. Always examine the log file VEMaster creates to see what changes it has made to the pcm image file. Open the image file in Tunercat (or LT1-Edit) and make sure everything looks okay. I will not be held responsible for damages resulting from the use of the program. Use at your own risk.

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I got VEMaster to work, thanks for your help, now my data master program is acting up, connects then disconnects then reconnects again every few seconds, have no idea what is wrong. Maybe I will try free scan, anyone use it?

 

Mine does that too cause the aldl comm port isn't snug if you insert the plug all the way. I have to pull it out just a tad bit and then connection is solid. Give that a try.

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