LS1Edit - reduce timing/fuel?
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
LS1Edit - reduce timing/fuel? I used LS1Edit last year to tune my modified (H/C) car so it would pass inspection. This year my car failed again with NO additional mods.
HC = 1.36 (limit .60)
CO = 13.35 (limit 10.0)
The inspection tech said this means unburned fuel is in the exhuast and the timing is too advanced.
Is there a better instruction manual for LS1Edit now; how do you reduce fuel/air ratios and timing? It has been so long since I worked with this program that I forgot how to use it.
Thanks..
HC = 1.36 (limit .60)
CO = 13.35 (limit 10.0)
The inspection tech said this means unburned fuel is in the exhuast and the timing is too advanced.
Is there a better instruction manual for LS1Edit now; how do you reduce fuel/air ratios and timing? It has been so long since I worked with this program that I forgot how to use it.
Thanks..
TECH Apprentice
Joined: Dec 2001
Posts: 357
Likes: 0
From: Whitby Ont Canada
Originally Posted by robertbartsch
I used LS1Edit last year to tune my modified (H/C) car so it would pass inspection. This year my car failed again with NO additional mods.
HC = 1.36 (limit .60)
CO = 13.35 (limit 10.0)
The inspection tech said this means unburned fuel is in the exhuast and the timing is too advanced.
Is there a better instruction manual for LS1Edit now; how do you reduce fuel/air ratios and timing? It has been so long since I worked with this program that I forgot how to use it.
Thanks..
HC = 1.36 (limit .60)
CO = 13.35 (limit 10.0)
The inspection tech said this means unburned fuel is in the exhuast and the timing is too advanced.
Is there a better instruction manual for LS1Edit now; how do you reduce fuel/air ratios and timing? It has been so long since I worked with this program that I forgot how to use it.
Thanks..
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Thanks...
OK so I download the current program and save it to a disk. Then I find the high octane table and reduce the RPM numbers across the board by 3-5%.
Is the high octane table a separate tab?
Is there a manual on the software now or is it the same junk that is impossible to understand?
Thanks...
OK so I download the current program and save it to a disk. Then I find the high octane table and reduce the RPM numbers across the board by 3-5%.
Is the high octane table a separate tab?
Is there a manual on the software now or is it the same junk that is impossible to understand?
Thanks...
TECH Apprentice
Joined: Dec 2001
Posts: 357
Likes: 0
From: Whitby Ont Canada
Originally Posted by robertbartsch
Thanks...
OK so I download the current program and save it to a disk. Then I find the high octane table and reduce the RPM numbers across the board by 3-5%.
Is the high octane table a separate tab?
Is there a manual on the software now or is it the same junk that is impossible to understand?
Thanks...
OK so I download the current program and save it to a disk. Then I find the high octane table and reduce the RPM numbers across the board by 3-5%.
Is the high octane table a separate tab?
Is there a manual on the software now or is it the same junk that is impossible to understand?
Thanks...
The high octane table is a seperate table
NO & YES
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
In the user guide I found some (helpful?) guidance.
So I think the deal is:
Go to Engine Calibrations tab
Go to Ignition tab
Go to high Octane Spark Advance tab
Go to RPM column
Edit whole table frame (multiply by 95) providing a reduction of 5%
Right?
Thanks...
So I think the deal is:
Go to Engine Calibrations tab
Go to Ignition tab
Go to high Octane Spark Advance tab
Go to RPM column
Edit whole table frame (multiply by 95) providing a reduction of 5%
Right?
Thanks...
TECH Apprentice
Joined: Dec 2001
Posts: 357
Likes: 0
From: Whitby Ont Canada
Originally Posted by robertbartsch
In the user guide I found some (helpful?) guidance.
So I think the deal is:
Go to Engine Calibrations tab
Go to Ignition tab
Go to high Octane Spark Advance tab
Go to RPM column
Edit whole table frame (multiply by 95) providing a reduction of 5%
Right?
Thanks...
So I think the deal is:
Go to Engine Calibrations tab
Go to Ignition tab
Go to high Octane Spark Advance tab
Go to RPM column
Edit whole table frame (multiply by 95) providing a reduction of 5%
Right?
Thanks...
you are correct Sir Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I replaced some hard parts this weekend and will do the programming this week.
I put some new 02 sensors in and some MSD plug wires. The old O2s were really black (too much fuel).
What is the gismo on the fuel rail that is held in by a snap ring; I thought it was a fuel pressure regulator. No parts store listed this part, however. One of the codes I was showing a few weeks ago was a high fuel pressure reading in the fuel rail (passenger side)?
I put some new 02 sensors in and some MSD plug wires. The old O2s were really black (too much fuel).
What is the gismo on the fuel rail that is held in by a snap ring; I thought it was a fuel pressure regulator. No parts store listed this part, however. One of the codes I was showing a few weeks ago was a high fuel pressure reading in the fuel rail (passenger side)?
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Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I'm confused.
Is the "idle and curb" test done while the car is using the high octane table?
Is the low octane table only used when the knock sensors detect detonation? Is it possible that since my cam is larger than stock that the knock sensors are telling the PCM to use the low octane tables?
Is the "idle and curb" test done while the car is using the high octane table?
Is the low octane table only used when the knock sensors detect detonation? Is it possible that since my cam is larger than stock that the knock sensors are telling the PCM to use the low octane tables?
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TECH Regular
Joined: Sep 2004
Posts: 404
Likes: 0
From: Raleigh, NC
You meant .6 on CO right. I have 1.4 CO on my non cat, cam, headers car. 0.6 I believe is the limit for CO in most places. And for HC none of those numbers can be right. 50ppm HC would be an really efficient cat car.
Robert, mutiply the table by 95% will only reduce your timing about 1.5*. You can select the whole table and subtract 3, 4 or 5* easier.
Also there is a tab for idle fuel, one for base timing, and then the VE table. Reduce the VE table as you would for most cam tuning, reduce the first column I think its 400rpms x70%, then next one x75%, and so on up to the 1200rpm column (hang with me here, I havent touched edit in 8 months due to my current deployment maybe off a few rpms on the columns). Tweak the tables a little and save the new one as Etest. Good luck man.
Also there is a tab for idle fuel, one for base timing, and then the VE table. Reduce the VE table as you would for most cam tuning, reduce the first column I think its 400rpms x70%, then next one x75%, and so on up to the 1200rpm column (hang with me here, I havent touched edit in 8 months due to my current deployment maybe off a few rpms on the columns). Tweak the tables a little and save the new one as Etest. Good luck man.
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I reduced the high octane and low octane tables by multiplying all cells by 93.
My engine runs a lot different (stronger?) now. I need to check my Ltrims with another computer program (OBD2) to see if I am in the ball park....
I did not see a way to reduce the RPM values at the top of the table. I'm I missing something?
My engine runs a lot different (stronger?) now. I need to check my Ltrims with another computer program (OBD2) to see if I am in the ball park....
I did not see a way to reduce the RPM values at the top of the table. I'm I missing something?
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
I'm looking at the NYS inspection report now
2004 Allowed HC = .60 gpm (my test = 1.36 - fail)
2004 Allowed CO = 10.0 GPM (my test = 13.35 - fail)
2004 Allowed Nox = 1.5 gpm (my test = .82 - pass)
Last year the test was easier for the same make and model car (99 F-body)
2003 Allowed HC = .80
2003 Allowed Co = 15.0
2003 Allowed Nox = 2.0
This seems unfair to retroactively tighten the emmessions standards two years in a row - AFTER the car was manufactured.....
2004 Allowed HC = .60 gpm (my test = 1.36 - fail)
2004 Allowed CO = 10.0 GPM (my test = 13.35 - fail)
2004 Allowed Nox = 1.5 gpm (my test = .82 - pass)
Last year the test was easier for the same make and model car (99 F-body)
2003 Allowed HC = .80
2003 Allowed Co = 15.0
2003 Allowed Nox = 2.0
This seems unfair to retroactively tighten the emmessions standards two years in a row - AFTER the car was manufactured.....
