Lets talk PCM tuning and LS1-EDIT
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From: Barto PA
Re: Lets talk PCM tuning and LS1-EDIT Hmm very interesting on the knock thing:
Decay vs. RPM:
This is a factor that will effect how quickly knock retard is degraded once the knock counter has stopped incrementing. The greater the magnitude of this value the more quickly spark retard will return to zero on absence of any knock detection.
it also sounds that you can add fuel to cretain injectors as well. Did I read that right?
Decay vs. RPM:
This is a factor that will effect how quickly knock retard is degraded once the knock counter has stopped incrementing. The greater the magnitude of this value the more quickly spark retard will return to zero on absence of any knock detection.
it also sounds that you can add fuel to cretain injectors as well. Did I read that right?
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From: St Louis, MO
Re: Lets talk PCM tuning and LS1-EDIT LT1 Edit has individual cylinder fuel trim. You dont have to make tables for each cylinder, but you can apply a correction factor to individual cylinders. GM actually does this from the factory to correct for the intake manifold design.
Eric
Eric
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From: Corona
Re: Lets talk PCM tuning and LS1-EDIT [quote]Originally posted by Cool28:
<strong>Hmm very interesting on the knock thing:
Decay vs. RPM:
This is a factor that will effect how quickly knock retard is degraded once the knock counter has stopped incrementing. The greater the magnitude of this value the more quickly spark retard will return to zero on absence of any knock detection.
it also sounds that you can add fuel to cretain injectors as well. Did I read that right?</strong><hr></blockquote>
Yes you can but would need an individual cycl EGT setup to make true corrections. Unless you know another way to read each cycl AF ratio?
<strong>Hmm very interesting on the knock thing:
Decay vs. RPM:
This is a factor that will effect how quickly knock retard is degraded once the knock counter has stopped incrementing. The greater the magnitude of this value the more quickly spark retard will return to zero on absence of any knock detection.
it also sounds that you can add fuel to cretain injectors as well. Did I read that right?</strong><hr></blockquote>
Yes you can but would need an individual cycl EGT setup to make true corrections. Unless you know another way to read each cycl AF ratio?
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From: St Louis, MO
Re: Lets talk PCM tuning and LS1-EDIT [quote]Originally posted by SCZ28:
<strong>
Yes you can but would need an individual cycl EGT setup to make true corrections. Unless you know another way to read each cycl AF ratio?</strong><hr></blockquote>
I know its old school, but you can read the plugs. Its not recommended to tune each cylinder unless you know what you're doing. It is cool that its possible.
Eric
<strong>
Yes you can but would need an individual cycl EGT setup to make true corrections. Unless you know another way to read each cycl AF ratio?</strong><hr></blockquote>
I know its old school, but you can read the plugs. Its not recommended to tune each cylinder unless you know what you're doing. It is cool that its possible.
Eric
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From: Corona
Re: Lets talk PCM tuning and LS1-EDIT [quote]Originally posted by Cool28:
<strong>I don't know using NOS or forced air that would be a key thing I would think.</strong><hr></blockquote>
It might be important(on high hp cars) but the ways to measure individual cylinders is expensive. Unless you are testing a custom intake that distributes the air weird it wouldn't be worth it. Having an EGT sensor on each primary is difficult as well with our engine/header configurations.
Bank to bank O2 sensor work well enough to diagnose if one side is having problems even if 1 cylinder is a little off.
If you guys want material to read the links I posted are good and also the Edit site.
http://lt1.net/editor/
www.carputing.com
<strong>I don't know using NOS or forced air that would be a key thing I would think.</strong><hr></blockquote>
It might be important(on high hp cars) but the ways to measure individual cylinders is expensive. Unless you are testing a custom intake that distributes the air weird it wouldn't be worth it. Having an EGT sensor on each primary is difficult as well with our engine/header configurations.
Bank to bank O2 sensor work well enough to diagnose if one side is having problems even if 1 cylinder is a little off.
If you guys want material to read the links I posted are good and also the Edit site.
http://lt1.net/editor/
www.carputing.com
Re: Lets talk PCM tuning and LS1-EDIT This sounds great...one question:
Should I get a HPP3 now for my rear end swap, fan settings and maybe to bump the rev limiter later on with head and cam, or should I just bite the bullet and wait a month or for LS1-edit?
Should I get a HPP3 now for my rear end swap, fan settings and maybe to bump the rev limiter later on with head and cam, or should I just bite the bullet and wait a month or for LS1-edit?
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From: Corona
Re: Lets talk PCM tuning and LS1-EDIT [quote]Originally posted by 99 Black Bird T/A:
<strong>This sounds great...one question:
Should I get a HPP3 now for my rear end swap, fan settings and maybe to bump the rev limiter later on with head and cam, or should I just bite the bullet and wait a month or for LS1-edit?</strong><hr></blockquote>
I would bet it will be more than a month on Edit. Get a used HPP and you can resell it for about what you paid if you want to tweak things now.
Brett
<strong>This sounds great...one question:
Should I get a HPP3 now for my rear end swap, fan settings and maybe to bump the rev limiter later on with head and cam, or should I just bite the bullet and wait a month or for LS1-edit?</strong><hr></blockquote>
I would bet it will be more than a month on Edit. Get a used HPP and you can resell it for about what you paid if you want to tweak things now.
Brett
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From: Houston, TX
Re: Lets talk PCM tuning and LS1-EDIT [quote]Originally posted by MTI:
<strong>Hey guys! Great Topic!
I've been tuning LT1 PCM's in house for about 6 years now and have learned nearly everything there is to know about these computers. I recently acquired LS1 Edit for the '99 - '00 cars and let me tell you, there are some similarities but the LS1 PCM is extremely complex compared to the LT1. It is really a great program for people who wish to spend the necessary time learning about and tuning their cars. You will not be able to just "jump in" and start making adjustments to your PCM. The spark tables, knock retard and A/F ratio tables require a lot of time and patience to begin figuring out. Once you do though, fine tuning a car will be fairly easy. It's also nice to be able to select and turn off various codes to prevent any annoying check engine lights.
I've done several PCM's for cars in house now with various combinations and have seen some great results! I'll keep you guys better informed as I begin to master the program! <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Hey Jason I can't wait until you can tune the 01's. I'll be up for that, plus some stage 2 heads soon! <img src="images/icons/wink.gif" border="0">
Peace,
Craig.
<strong>Hey guys! Great Topic!
I've been tuning LT1 PCM's in house for about 6 years now and have learned nearly everything there is to know about these computers. I recently acquired LS1 Edit for the '99 - '00 cars and let me tell you, there are some similarities but the LS1 PCM is extremely complex compared to the LT1. It is really a great program for people who wish to spend the necessary time learning about and tuning their cars. You will not be able to just "jump in" and start making adjustments to your PCM. The spark tables, knock retard and A/F ratio tables require a lot of time and patience to begin figuring out. Once you do though, fine tuning a car will be fairly easy. It's also nice to be able to select and turn off various codes to prevent any annoying check engine lights.
I've done several PCM's for cars in house now with various combinations and have seen some great results! I'll keep you guys better informed as I begin to master the program! <img src="images/icons/smile.gif" border="0"> </strong><hr></blockquote>
Hey Jason I can't wait until you can tune the 01's. I'll be up for that, plus some stage 2 heads soon! <img src="images/icons/wink.gif" border="0">
Peace,
Craig.
Re: Lets talk PCM tuning and LS1-EDIT This is a great thread, hope to see Jayson "The Man" Cohen in more threads <img src="images/icons/smile.gif" border="0"> Maybe he can even tune out my knock on my truck for me <img src="images/icons/smile.gif" border="0">
Jason
MTI Built
422ci LS1
10.89@126
487rwhp on 28" Slicks...
Jason
MTI Built
422ci LS1
10.89@126
487rwhp on 28" Slicks...
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
On The Tree
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From: Michigan
Re: Lets talk PCM tuning and LS1-EDIT Anyone know how big the Flash programs are as far as MB size?
The ones I've flashed into Caterpiller D engines are relativly small, around 175-250KB depending on the options within the program. Cat has sent programs to our shop via e-mail.
... 1002
The ones I've flashed into Caterpiller D engines are relativly small, around 175-250KB depending on the options within the program. Cat has sent programs to our shop via e-mail.
... 1002
Re: Lets talk PCM tuning and LS1-EDIT The '98 uses an Intel 28F400BX chip, which is a 4 MBit chip, 512 kbyte file size.
I'd imagine the later years will use the 400 or possibly an 800 (1 MByte file size).
OBDI LT1's used (2) 512kbit chips (128 kbytes), OBDII LT1's used (1) 512, (1) 28F010 chip (164 kbytes).
I'm no longer guessing as to availability. I asked this week about the '98 version, and was told it's gonna be a while, as they have a lot of stuff left to figure out.
-Andrew
I'd imagine the later years will use the 400 or possibly an 800 (1 MByte file size).
OBDI LT1's used (2) 512kbit chips (128 kbytes), OBDII LT1's used (1) 512, (1) 28F010 chip (164 kbytes).
I'm no longer guessing as to availability. I asked this week about the '98 version, and was told it's gonna be a while, as they have a lot of stuff left to figure out.
-Andrew
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From: Clarkston
Re: Lets talk PCM tuning and LS1-EDIT Very Good Thread!
Can someone confirm that we will be able to delete codes and change injector sizes in LS1 Edit?
Also, what about Torque Management!! Will we have the ability to modify??
Thanks in advance!
Can someone confirm that we will be able to delete codes and change injector sizes in LS1 Edit?
Also, what about Torque Management!! Will we have the ability to modify??
Thanks in advance!
Teching In
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From: Houston, Tx.
Re: Lets talk PCM tuning and LS1-EDIT This is something that will be very very usefull for forced induction cars no doubt. I think i will get one....but i am a 98 <img src="images/icons/frown.gif" border="0">
Re: Lets talk PCM tuning and LS1-EDIT aaaaaaahahahahaha!
did you guys check this out, i didnt catch it at first.....
http://www.slowcar.net/LT1Edit.htm
Now to more serious things <img src="images/icons/grin.gif" border="0"> , how and where do i go to get on the LT1 edit list. I must start learing now, so that in 2 years i'll be ready for the 2002 LS1 edit!
did you guys check this out, i didnt catch it at first.....
http://www.slowcar.net/LT1Edit.htm
Now to more serious things <img src="images/icons/grin.gif" border="0"> , how and where do i go to get on the LT1 edit list. I must start learing now, so that in 2 years i'll be ready for the 2002 LS1 edit!
On The Tree
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From: Corona
Re: Lets talk PCM tuning and LS1-EDIT [quote]Originally posted by Sparky:
<strong>Thanks Brett, so I assume we can modify TM, very coo!! <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> </strong><hr></blockquote>
I am assuming it will be like LT1 Edit where you can enable and disable certain codes. To be sure you can talk to Ken pcmdoc@surfree.com
The Edit list has a link on the site I posted or you can go to Topica.com and search LT1 Edit and you will find it.
Brett
<strong>Thanks Brett, so I assume we can modify TM, very coo!! <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> </strong><hr></blockquote>
I am assuming it will be like LT1 Edit where you can enable and disable certain codes. To be sure you can talk to Ken pcmdoc@surfree.com
The Edit list has a link on the site I posted or you can go to Topica.com and search LT1 Edit and you will find it.
Brett
Joined: Nov 2001
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From: Anderson, Indiana
Re: Lets talk PCM tuning and LS1-EDIT What coolant temp. are you refering to? If there is an issue there, explain the details and it can be added to the 99-00 version before it's released.
John
Speartech Fuel Injection Systems, Inc.
John
Speartech Fuel Injection Systems, Inc.
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91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
91 Z28 LS2 408CI, LS9 Supercharger, LPE GT7 cam, Yank3000, 3450 raceweight.
Latest numbers: 9.71 ET, 141.42 MPH, 1.40 60' , 610 RWHP Mustang Dyno
www.speartech.com
