Datamaster Expert Needed
Thread Starter
Racer
Joined: Mar 2002
Posts: 498
Likes: 21
From: Maine
Datamaster Expert Needed
I'm new to TTS DataMaster and I've logged some data and the tune looks to be lean. The Lterms seem high. Isn't it better to have them around 122-128. Can someone confirm this for me. http://www.woodchip.com/93VetteChip1.uni
The file size is 1.5MB
The file size is 1.5MB
Instructor
Joined: Dec 2001
Posts: 151
Likes: 0
From: Mobile al
Re: Datamaster Expert Needed (93Blackrose)
I'll reply, I'm no expert but yes the LT's should be closer to 128.
My understanding is that they should be at or below, when you go to WOT the LT's will go to 128 if you are a bit rich and will go 129 when you are lean.
I don't have any experience with a non stock cam, but your MAP readings seem high, I think that could be because the cam is messing with the idle.
I did see at one point that your LT's were 160!!! the computer is at it's limit putting fuel in to compensate for the lean condition.
Watch going full throttle until you can be sure that it's not leaning out in PE mode as well.
That was the only things that I saw, but I'm only just wet behind the ears with datamaster too :cheers:
I like your car, nice paint, and love that color
[Modified by kbklt1, 10:05 PM 6/18/2003]
My understanding is that they should be at or below, when you go to WOT the LT's will go to 128 if you are a bit rich and will go 129 when you are lean.
I don't have any experience with a non stock cam, but your MAP readings seem high, I think that could be because the cam is messing with the idle.
I did see at one point that your LT's were 160!!! the computer is at it's limit putting fuel in to compensate for the lean condition.
Watch going full throttle until you can be sure that it's not leaning out in PE mode as well.
That was the only things that I saw, but I'm only just wet behind the ears with datamaster too :cheers:
I like your car, nice paint, and love that color
[Modified by kbklt1, 10:05 PM 6/18/2003]
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Re: Datamaster Expert Needed (kbklt1)
For the most part your off idle cruise above 1200 RPM looked in the ball park. However when the car was idling along below 1200 RPM it was lean as indicated by the 155 to 160 fuel trims. There is a program called VE master that could help you to iterate the proper numbers in your VE maps. Double check your fuel pressure as it should be in the range between 39 and 43 PSI at idle with the vacuum hose disconnected at the fuel pressure regulator you should have between 43 and 45 PSI.
Go this link and download it:
http://home.attbi.com/~jgeorger/
Download the version for the DA2/DA3 ECMs and then go out and drive the car for about 45 minutes. Make datalogs at 1200, 1500, 2000 and 2500 RPM for sustained periods of at least 10 minutes in each RPM range. Then go home and run VE Master. It will input the changes directly to your bin file. It is also a good idea to save the original file under another name, that way you always have a good known working file.
[Modified by tjwong, 7:24 AM 6/21/2003]
Go this link and download it:
http://home.attbi.com/~jgeorger/
Download the version for the DA2/DA3 ECMs and then go out and drive the car for about 45 minutes. Make datalogs at 1200, 1500, 2000 and 2500 RPM for sustained periods of at least 10 minutes in each RPM range. Then go home and run VE Master. It will input the changes directly to your bin file. It is also a good idea to save the original file under another name, that way you always have a good known working file.
[Modified by tjwong, 7:24 AM 6/21/2003]
