=== COS5 notes === These notes are extracted from the COS5 thread on the forum. Start from either of these OS's (with the same transmission as yours): - 12225074 Australian Holden - 12212156 Camaro/Firebird 2002 NOTE: The latest COS5 calibrations are included when you install EFILive software. --- SETUP NOTES --- Fix all out-of-range cells (including A0012, A0013). A0003 TP VE Enable: Set to disable (can be enabled later if you intend to run the TP VE Table). A0008 OL ECT Commanded Fuel Multiplier: Use warmup ECT vs BEN logs to adjust this table (adjust in OL). A0014 IAT VE Multiplier: Use seaonsonal IAT vs BEN logs to adjust this table (adjust in OLSD). N20 monitor is done via the same input as the Valet mode; once it is grounded then the two compensation tables become active, although, there are two parameters to stop those two tables even if the N20 is on (A0017, A0018). COS4 was going to be the N20 options only, but in the end it was possible to squeeze everything in to one OS, though, on the later 2004+ OS's this might not be possible; there is a few cars in Aus running COS4, it's been out for a long time, but these were only used by workshops for N2O cars only. --- TP VE Table (A0007) --- Nearly all 2003+ OS's use ETC, it is not known if TP VE table would work too well on them. The VE lookup pid only works when using it in g*K/kPa (if you do it in % it may report 0). Given plenty of logging the BEN will be so spot on you'd think the WBO2 was stuck! The one problem this does have is in an A4 transitioning in and out of Drive, there is no detected load change for the VE, however that also has an advantage too because the fueling remains constant and the spark/IAC handles the RPM drop. Use the TP VE only in the area's you cannot get consistent MAP values in, and then switch back to the MAP VE once things become steady. Make sure DFCO is disabled. TP VE Table setup: 0. Set A0003 TP VE Enable to disable. 1. You need to have a good VE table with BENS very close to 1.00. 2. You need to change your preferences to view VE Table in g*K/kPa units. 3. Log a pid called GM.VETABLE_DMA to build your initial TP VE table. 4. Create a map that has the same dimensions as the TP VE Table and use the PID above as the Data. 5. Go for a drive and log, try and hit as many as possible points in the TP VE Table map. 6. Now copy/paste the values in the TP VE Table map to the TP VE Table in your COS5 tune file (experiment with the copy and fill function and the the Linear Fill functions). After the initial build of the TP VE Table, enable the TP VE Table, change the TP VE Table map created above so that the data is now using the BEN factor; this allows you to fine tune that table going forward. Add a little to your TP table that you have plotted to ensure it isn't lean. You will need to play with cut in/out points for switching between TP and MAP VE Tables; for initial tuning, run exclusively off the TP VE Table, this allows you to apply BEN corrections; to use the COS5 on an ongoing basis, apply BEN corrections both tables in their active regions. If you get bucking at low RPM low throttle, check your base spark and high octane spark tables; if they are way different where the bucking occurs try closing the gap between them. ----------------------------------------------------------------------------------------------------