Hello, first off new to tuning so the tune isnt perfect.. 2bar sd tune.. setup on the truck is decaps, a1000 pump, s475, cam and springs.. The issue I am having its going past 1.2g on the spark table and I am losing control of timing.. Where should I look, been doing so search and maybe adjust the injector rate/ve table to get the g/cyl lower? Thanks
2bar, 12deg.hpt
timing drop.hpl
How much further are you going to push it? It looks like you got to 193kPA and 1.55 g for cyl airmass.
You can certainly scale it by 25%, or even 50% if you're going to really push it a lot further.
This is maxed out.. I dont want to push it any harder than this.. Im confused on where I should 25% to, flow rate vs kpa?Originally Posted by kevin87turbot
I'd probably just leave it then.
Also don't mirror the high/low octane tables when you are done. The low octane table needs less timing in it.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Ok, I probably will, Just drop the whole table by 3-4*?
I'd do 5 degrees.
Then figure out the knock issue. I'm not a fan of decaps, they don't exactly have the best spray pattern. So it's tough to say if the issue is those, a spark issue, something vibrating and causing the knock.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
That's exactly what I would do. Just let it ride.
Subtract 4 degrees from the low octane timing table.
I thought 2-bar Map OS deletes the low octane table.
In mine 411 ecu I have no more low octane table, 2-bar
For advance past 1.2g/cyl I use the table called "AFR Advance" It allows you define timing vs air fuel ratio
Suppose he could test that for his. Stick 13 degrees in the low octane table and see if it runs 13 degrees.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
There is some kind of knock learn number 0 to 1 that shows the amount of timing used from low octane table
i think 1.0 is all high octane table
In 2-bar OS it never moves from 1.0 it never "learns" any knock to use the low octane table
At least in mine, 411 ecu 125OS->2bar
The website still says this, I would think it's still true and hope they didn't change it.
2bar and 3bar MAP - Speed Density (GenIII V8)This enhancement contains the following features:
- 2bar MAP sensor support (calibration capability for GM 0-5V linear MAP sensors)
- Retains 5 kPa resolution in non-boost regions (2bar pre 04/05)
- 5 kPa resolution in boost regions (2bar pre 04/05)
- 10 kPa resolution in boost regions (2bar and 3bar post 04/05)
- secondary VE table not used (if applicable)
- New MAP referenced "Boost Enrich" table
- New openloop MAP threshold
- Dual (High and Low Octane) Spark table support
- Speed Density mode only
- VCM Scanner histogram automatically recognizes and adjusts for 2bar/3bar feature (if applicable)
- New 2bar/3bar MAP PID for VCM Scanner (if applicable)
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
couple things wrong
1. my 2-bar OS still looks for the maf sensor. It never truly starts "Speed Density ONLY"
2. No low octane table in mine
maybe its just my OS
Yeah I have a set of plugs I need to put in and gap them properly for the boost I am running
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