Just curious about how you guys are doing your spark tables. How are you logging the cylinder airmass in g/cyl? Is dynamic cylinder air the same thing?
Just curious about how you guys are doing your spark tables. How are you logging the cylinder airmass in g/cyl? Is dynamic cylinder air the same thing?
Jason
01 Camaro Z28 LS3 525hp Built 4l60e
74 Camaro Z28 LT 355 fully forged roller with t56 4.56 gears
Yes, use dynamic cylinder air.
Spark tables are tricky and there is no easy explanation to it other than put the car on the dyno and find the lowest spark value to use that makes the best power. For example, if at WOT 25º makes 425 hp and 29º makes 427 hp, stick with 25º. Just my opinion.
Sulski Performance Tuning
2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB
I can understand but I don't have readily available access to a dyno.
I think when I used dynamic cylinder air PID against the tables it was off by a large number. Like one was reading .045 and the other was reading .69 (.045/.69 is a bit of a big difference) so I figured they were referencing something totally different from one another. I will go back and look through it tonight when I get home.
Jason
01 Camaro Z28 LS3 525hp Built 4l60e
74 Camaro Z28 LT 355 fully forged roller with t56 4.56 gears
So is the dynamic cylinder air an accurate source of information to get data from or does it get information from a formula from various sensors that needs to be calculated? Does the MAF need to be tuned and running for it to be correct or does it gather information from the MAP? I guess that's what I'm asking. I don't want to be using it for correct information if that information is not correct yet.
Jason
01 Camaro Z28 LS3 525hp Built 4l60e
74 Camaro Z28 LT 355 fully forged roller with t56 4.56 gears
You have to have your fueling tables for it to register correctly. That is how it gets your g/cyl.
Sulski Performance Tuning
2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB
Are you talking about just the VE tables or are you including the tabs under the Fuel tab (i.e. General, Cutoff/DFCO, OL&CL, PE, COT, Transient)?
I'm pretty sure I have the majority of stuff under the Fuel tab correct. I'm still dialing in the VE table 100% but I'm pretty much at around 90 - 95% on that now.
How is it using fueling tables to calculate airmass in the cylinder? Not that I'm questioning you, I just would have thought that it derived it from MAF or the MAP since they measure airmass going into the engine.
Jason
01 Camaro Z28 LS3 525hp Built 4l60e
74 Camaro Z28 LT 355 fully forged roller with t56 4.56 gears
stock 99' LS1 + powerglide
gt42 a/r 1.06
#80lb siemens @ 43.5psi rail pressure on E85
return fuel system runing 1:1 FPR
aeromotive A-1000 pump
2 bar SD tune
Injector data needs to be correct of course, but also VE and MAF
Sulski Performance Tuning
2000 WS6 M6 - LS6 (long block, refreshed top end), 10.8:1 CR, 90 mm ported FAST, Exo-Skel, 227/232 cam, QTP HVMC, EWP, GMMG, 9" w/4.11s
2018 Sierra SLT 5.3L A8 - Airaid intake tube, GM Borla catback, L86 Intake/Ported TB