upgrading from 99 to 2002 OS? really worth it?

[rumblebox]

i've heard of a lot of people upgrading to the newer OS, but what benefits would i get from it? easier to tune? less tuning needed?

[joecar]

Advantages:
- single VE table (makes tuning a little easier),
- a few extra tables,
- some unlisted GM fixes/corrections,
- available 4L80E transmission segment,
- available COS5 (boost/nitrous/alpha-n tables),
- some extra _DMA pids available (e.g. DYNAIRTMP_DMA).
- available extra tables for transient fueling, lean cruise (via .cax file).

Disadvantages:
- you have to manually copy your old tables over to the new file, takes about 2 hours (3 with beer).

[rumblebox]

i started copying everything over when i was planning to do a 4L80 swap a couple years ago, but i never upgraded after i axed the 4L80 swap. i guess now is the time to do it, since i haven't tuned a single thing since i did the top end and cam swap.

[joecar]

When you copy the tables, do copy-with-labels from the old file, do paste-with-labels into the new file...

the "with-labels" causes the pasted table to align up with the values on the axises.

[joecar]

Some people just tune with the older OSes, it really isn't that much more work...

but some people like the conveniences/advantages I mentioned above.

[maudyZ28]

I found it useful as the step to a COS. The custom operating systems have so much more options and make tuning nicer for a head/cam setup running in OLSD only, it also has the option of dual spark timing (high and low octane tables when running OL) and also the noz, boost etc etc modes as joecar mentioned. I'm sure I have a migrated LS1 99 tune to 02 tune somewhere if you want it. All stock BTW, then I just changed the tune and flashed in mine. If you've not changed anything yet since your build it would e a good start ?

[joecar]

Yes, the COS's retain HO/LO adaptive spark timing when running SD

(running MAF-less causes and requires a MAF DTC (which on the OEM OS's causes failover to LO timing].

[rumblebox]

is there a way to only use a wideband without leaving CL once at OT?

[joecar]

is there a way to only use a wideband without leaving CL once at OT?When in CL, the wideband wlll report stoich (lambda = 1) since the PCM is trimming to stoich)...

i.e. the wideband won't show the deviation from commanded lambda, but the trims will.

[rumblebox]

i kindof understand. so you can only use the wideband for tuning purposes, not every day driving purposes?

[tokymon]

you can use some widebands for every day driving
some can be set up to mimic a narrow band 02 sensor

[maudyZ28]

there is no detriment to leaving the WB in place. I run mine in there all the time, but also run OLSD permanently so check there is nothing 'funny' happening by glancing at the WB. As tokymon, you can program the WB outputs to mimic a NB and use this to trim the fuel as it mimics a normal stock O2 sensor. But other than that the WB has no active use in fueling. Interestingly, more modern cars now run WB to adjust fueling as this is much more accurate than the NB and they achive more MPG. I've yet to test the theory trying to get ecomony out of the camaro as I somehow keep putting my foot down which obv kiss the eco run, maybe I shouldn't have made it sound so good at WOT hahah :D

[Boost]

^ lol :cool:



Disadvantages:
- you have to manually copy your old tables over to the new file, takes about 2 hours (3 with beer).

:hihi: :cheers::hihi:

[joecar]

i kindof understand. so you can only use the wideband for tuning purposes, not every day driving purposes?You can run the wideband anytime...

you just have to be careful while tuning (make sure trims are not correcting ahead of you/wideband);

but you can certainly run the widebane every day to monitor if CL/trimming is trimming properly, and to see if there is any deviation on tip-in or tip-out.

Some widebands like the LC-1, as was said above, have an output for providing a narrowband signal that the PCM can use.

[rumblebox]

I'm getting an LC-1. Seems like everyone loves that one.

[joecar]

When you get the LC-1, bench test it before installing it.