Custom OS#5

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December 31st, 2012
joecar

Quote:

Originally Posted by whackem04

Whats the best way to populate the TPS map at the hard to reach, low TP high RPM area?

Eyeball extrapolation.
January 24th, 2016
Ellwein Engines

I've read the tutorials and every thread related to OS5.
I cannot figure out how the table "Commanded Fuel vs RPM (Normal) should be set or it's function. {B3647}
I am setting up my PCM for simple nitrous spark retard. I think I have told the new OS to ignore TPS VE (Disable)
The tutorial talks about B3647 a bit and suggests initial settings. But I have not read on here that anyone has modified this table and or if it should just be set to 1.0
Any tips?
the B3647 has me stumped.
I don't have B3660
My original OS was 12212156
thanks,
Karl Ellwein
January 24th, 2016
TFZ_Z06

Quote:

Originally Posted by Ellwein Engines

I've read the tutorials and every thread related to OS5.
I cannot figure out how the table "Commanded Fuel vs RPM (Normal) should be set or it's function. {B3647}
I am setting up my PCM for simple nitrous spark retard. I think I have told the new OS to ignore TPS VE (Disable)
The tutorial talks about B3647 a bit and suggests initial settings. But I have not read on here that anyone has modified this table and or if it should just be set to 1.0
Any tips?
the B3647 has me stumped.
I don't have B3660
My original OS was 12212156
thanks,
Karl Ellwein

send me your email addr, I'll send you a copy of my tune setup for nitrous, OL, No Trims, No MAF. It will give you an idea. BTW, I would leave 3647 alone unless you are VE tuning.
January 24th, 2016
Ellwein Engines

Quote:

Originally Posted by TFZ_Z06

send me your email addr, I'll send you a copy of my tune setup for nitrous, OL, No Trims, No MAF. It will give you an idea. BTW, I would leave 3647 alone unless you are VE tuning.

Thanks, the comparison will help a lot.

[email protected]
January 25th, 2016
joecar

B3647 is the OL fueling table, it is used only in OL. If PE enables during OL then the richest of the two is selected (at the current operating cell).

B3647 is not used when you go from CL to WOT as in this case the residual LTFT is applied to WOT (i.e. in this case WOT is a reduced CL mode where even tho trims are not updated and applied, the last residual trim is applied).

You could do any of these:

a. set B3647 to EQR 1.0 everywhere (and make sure PE enables and is suitably rich at EQR 1.175 for NA).

b. set B3647 to EQR 1.0 below 75 kPa, and then ramp it up to EQR 1.175 (regardless of whether PE has enabled yet).

For NA you could have either PE and/or the high MAP columns of B3647 provide high load fueling.

For boost, you would enable PE at 105 kPa and set PE fuel suitably rich for boost.

Using B3647 means you will have to play with the OL ECT correction table A0008 (introduced by the COS in the A segment).
January 25th, 2016
Ellwein Engines

thanks a lot. That helps. Thanks Joecar and thanks TFZ_ZO6 for the file to let me compare.
January 25th, 2016
Ellwein Engines

One more question:
If you had an OK tune for B3647 for the car prior to installing the custom OS5 then would you paste that old table into new OS5 B3647 table as a starting point?
January 25th, 2016
joecar

Quote:

Originally Posted by Ellwein Engines

One more question:
If you had an OK tune for B3647 for the car prior to installing the custom OS5 then would you paste that old table into new OS5 B3647 table as a starting point?

The GM OS does not have table B3647...

When you install the COS, it replaces B3605 (which is ECT x MAP) with B3647 (which is RPM x MAP), and it retains the old data that B3605 contained...

so your new B3647 looks like the old B3605, but because the vertical axis now RPM (instead of ECT), the data in this table is not completely sensible, you have to edit it (see my suggestions above).

i.e. B3647 occupies the same space as B3605, but it changes the vertical axis from ECT to RPM, so the ECT x MAP data is not valid, you have to edit it into sensible RPM x MAP data.
January 26th, 2016
Ellwein Engines

Quote:

Originally Posted by joecar

The GM OS does not have table B3647...

When you install the COS, it replaces B3605 (which is ECT x MAP) with B3647 (which is RPM x MAP), and it retains the old data that B3605 contained...

so your new B3647 looks like the old B3605, but because the vertical axis now RPM (instead of ECT), the data in this table is not completely sensible, you have to edit it (see my suggestions above).

i.e. B3647 occupies the same space as B3605, but it changes the vertical axis from ECT to RPM, so the ECT x MAP data is not valid, you have to edit it into sensible RPM x MAP data.

AhHa! that makes it even more clear. Thank you so much joecar.
January 26th, 2016
joecar

No worries :cheers: let me know how it goes.
April 28th, 2016
Tre-Cool

whats the chances of being able to edit or allow support for up to 25 degrees of timing to be removed in the A0010 table? with the use of ethanol now, my normal timing map is is above 20 degrees under boost and i want to allow for a whole lot of timing removal if it looses a boost reference to the wastegates etc.

is it just an efilive limit for the table or ecu/tune limit?
October 10th, 2016
joecar

1 Attachment(s)

Quote:

Originally Posted by joecar

Updated COS5.txt notes.

Bump to the end of the thread, and minor edit.
April 26th, 2020
Highlander

Anyone know about Black02ss? 10 years since his last post.
April 26th, 2020
GMPX

Pretty sure he left the whole scene a long time ago, I think he sold his car and moved on.
April 27th, 2020
BowlingSS

Quote:

Originally Posted by GMPX

Pretty sure he left the whole scene a long time ago, I think he sold his car and moved on.

That is too bad he left. I am not on very often either but I am still here.

Bill
April 27th, 2020
joecar

Yeah, too bad.
October 14th, 2020
Aint Skeered

Quote:

Originally Posted by joecar

Yeah, too bad.

I have recently started looking back into the tps ve table. when I open the map for it in scan tool, it is missing a pid. what all pids are needed to log tps ve?
October 21st, 2020
joecar

Which pid are you missing...?
October 22nd, 2020
Aint Skeered

Quote:

Originally Posted by joecar

Which pid are you missing...?

Honestly not sure. I have Volumetric Efficiency selected , what else is needed for that and how do I tell what is missing for each map?
October 22nd, 2020
5.7ute

Quote:

Originally Posted by Aint Skeered

Honestly not sure. I have Volumetric Efficiency selected , what else is needed for that and how do I tell what is missing for each map?

T.P.S VE requires the Throttle Position and RPM pids to be selected as these are what is referenced on the Axis of the table. Also the VE table look up value pid is required to initially populate the table.
From there you can start using BEN values to dial the table in once activated.
October 22nd, 2020
Aint Skeered

I have all those and also selected Volumetric Efficiency for v8 just in case.
My biggest problem with this system is figuring out what pids are needed for each map . Is there some way to find that ? A tutorial on that?
November 24th, 2020
ne0c0de

For COS5 it tells you to ground PIN 56 on the RED Connector of the RED/BLUE ECU. What is the PIN on the GREEN/BLUE ECU ? Is it the same ? PIN 56 ?
November 24th, 2020
ScarabEpic22

Quote:

Originally Posted by ne0c0de

For COS5 it tells you to ground PIN 56 on the RED Connector of the RED/BLUE ECU. What is the PIN on the GREEN/BLUE ECU ? Is it the same ? PIN 56 ?

COS5 is not available on 1MB PCMs that use green/blue connectors, only 512kb ones that use red/blue.
November 25th, 2020
ne0c0de

Quote:

Originally Posted by ScarabEpic22

COS5 is not available on 1MB PCMs that use green/blue connectors, only 512kb ones that use red/blue.

Thanks Erik
November 25th, 2020
joecar

COS5 is only available for OS 12212156 which runs on 0411 PCM.
June 27th, 2021
Yortt

Quote:

Originally Posted by GMPX

V4 was going to be the N20 options only, but in the end it was possible to squeeze everything in to one O.S, though, on the later 2004+ O.S's this might not be possible. There is a few cars in Aus running O.S #4, it's been out for a long time, but these were only used by workshops for N2O cars only.
I had to a custom O.S #3 for a 2006 Hummer and that was pretty much full up so I am not sure how far we can go!.
Besides, nearly all 2003+ O.S' are used on ETC applications, I am not sure the TPS VE table would work too well on them.

Cheers,
Ross

I am looking at using N20 on a VZ is there anywhere I can access the custom operating system 04 so I can control the Nos?
Thanks
December 24th, 2021
Highlander

Quote:

Originally Posted by joecar

COS5 is only available for OS 12212156 which runs on 0411 PCM.

hmmmm
December 24th, 2021
joecar

Quote:

Originally Posted by Highlander

hmmmm

It is also available for Holden OS 12225074.

And it runs on various PCM's that are compatible with either of those OS's (12225074, 12212156).

Thanks :)
December 25th, 2021
BowlingSS

I used Cos5 on my 2001 Camaro.
December 25th, 2021
joecar

Quote:

Originally Posted by BowlingSS

I used Cos5 on my 2001 Camaro.

I did same on my 2001 TA...

I changed OS from 12202088 (2001 F-car) to 12212156 (2002 F-car), and then upgraded to COS5.
April 8th, 2022
Highlander

12587603 cos5
April 8th, 2022
Yortt

Quote:

Originally Posted by Highlander

12587603 cos5

This is only available with Tunerpro ?
April 14th, 2022
Highlander

what do you mean? Tunerpro has nothing to do with EFILive.
COS5 was an OS modification developped by EFIlive.
April 14th, 2022
Yortt

Quote:

Originally Posted by Highlander

what do you mean? Tunerpro has nothing to do with EFILive.
COS5 was an OS modification developped by EFIlive.

That is correct, however this COS5 operating system can be tuned with other software such as HP tuners and LS1 Flash cable for example. The COS5 is only available for 512kb PO1 PCM (as far as I know) not the 1024kb P59 pcm which the 12587603 is what this operating system runs on. The 12587603 operating system has been modified to duplicate COS5 functions (PCM Hacking) using Tunerpro to change the modified parameters in 12587603 for tuning.
April 15th, 2022
Highlander

hp tuners supporting an os developped by efilive was a dick move. I made the COS5 for 7603 with a plethora of enhancements and never released it for this very same reason. As far as I know no one has duplicated the nitrous portion of COS5.
November 27th, 2024
Supercharged111

Question: if a guy read a COS5 PCM with PCM Hammer, made changes with Tunerpro, and reflashed with PCM Hammer would that break stuff? Or would all the extra 1s and 0s of COS5 just stay untouched in the background? My hope is that the 4L80E min TCC stuff is unlocked in there.
November 27th, 2024
Yortt

Quote:

Originally Posted by Supercharged111

Question: if a guy read a COS5 PCM with PCM Hammer, made changes with Tunerpro, and reflashed with PCM Hammer would that break stuff? Or would all the extra 1s and 0s of COS5 just stay untouched in the background? My hope is that the 4L80E min TCC stuff is unlocked in there.

If you are using the COS5 operating system then it will include all the COS5 operating parameters as set out in the tune. With respect to the 4l80 settings I believe they are standard GM settings to suite the 4l60 transmission unless change to accommodate the 4L80 either by an after market adaptor harness or the transmission operating system has been changed to a 4L80.
November 27th, 2024
nonnieselman

As long as you didnt change anything and the checksum is bad now.
Do you have 02020005 OS?
November 27th, 2024
nonnieselman

Quote:

Originally Posted by Supercharged111

Question: if a guy read a COS5 PCM with PCM Hammer, made changes with Tunerpro, and reflashed with PCM Hammer would that break stuff? Or would all the extra 1s and 0s of COS5 just stay untouched in the background? My hope is that the 4L80E min TCC stuff is unlocked in there.

Send me your tune and i can change it for you.
May 8th, 2026
Promobass

I can't find a description of the functions of this OS. Where can I find this?

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