Help looking over tune

[bmd2_colo]

joecar is the man, squared me away.

[kylelavergne]

B0120: set to 4000 rpm.
B3616: set to 65% below 3200 rpm, 35% above 3200 rpm.
B4206: set to stock (131*F above 50*F).

D0960,1,2: set to 100% everywhere.
D0701,2,3: increase pressure early (eliminate the flat spot down low).

TCC Apply/Release tables:
you have the tables "upside-down"...
you must observe these rules:
3rd release < 3rd apply
4th release < 4th apply

B5913:9200lbs is GVWR. How would i "tweak" this table?
B4206:I guess stock would be enable. lol
D0701,2,3:How much to increase on early side & where to start/finish?

TCC Apply/Release Tables:
I did't mess with them. How would i fix this?

THANKS FOR THE HELP JOECAR!!!

[kylelavergne]

The numbers in the lower right area of the table are where the computer is pulling x amount of degrees of spark advance because of knock. Go into your Spark High and low tables and minus the amount that the computer is pulling from the table above in those cells. e.g. 4400 rpm 90 kPA MAP pull 3 degress from that cell in your hi/lo tables. Blend the values with the surround cells.

I kinda get it. How do i get to that map in scan tool? What should knock retard be? I was told +/- 1 deg was good. How do i know how much timing to pull off?

[joecar]

B5913:9200lbs is GVWR. How would i "tweak" this table? <--- depends on GVW and gearing; I saw that stock B5913 is same.
B4206:I guess stock would be enable. lol <--- I meant B4205, sorry for the typo.
D0701,2,3:How much to increase on early side & where to start/finish? <--- Immediately start increasing from zero and hit 70 psi by 295 tflb, and keep going up to 96 psi.

TCC Apply/Release Tables:
I did't mess with them. How would i fix this? <--- make appy curve be all above the release curve, do this for each of 3rd and 4th.

[bmd2_colo]

On the table thing,
edit properties, data is GM.KR or something like that, lookin for Degrees of spark retard.
Column- MAP pressure, KPA from dropdown menu
Row- Engine RPM, from dropdown menu

Gotta copy with labels from your B0120 Main VE Table and click 'paste labels' in each menu for for each tab, Row and Column.

Then load your log, hit average (x with line over it) and check out how much spark it is pullin.
I don't really think any knock is a good thing. Detonation in any engine would be bad, I think. Especially heavy ass rigs like yours and mine.
You test out joecar's recommendations yet?

[Big Mike]

Couple curiosities.

Why run with rev limiting totally disabled? Seem counter productive.

Why are most of your axle torque limiting settings LOWER than stock? By about half as much as stock in some. I see you have axle torque "disabled" but only doing that doesn't always kill them all by default. Thus they should still all be maxed out in the individual tables too.

Also try setting B6609 to zero instead of the max value you have it currently. Some truck OS need it maxed to disable (640 ft lbs), others need it zeroed. I've seen them both ways.

There's a lot of meat left in your spark tables with running 93 oct. We run 91/92 (E10) here and the 6.0's like a lot more timing in many of the areas where you're running very little. Burst knock table needs reduced too. This is one table that assists in low speed hard throttle transitions. Like say trying to spin the tires. Need to for KR during full throttle downshifts afterward though.


Joe- the "upside down" TCC tables are the way the 4L80E trucks are. Every one I've seen at least. Same with the upshift/downshift points. They're often "upside down" (from the typical car calibration) too.

[kylelavergne]

Couple curiosities.

Why run with rev limiting totally disabled? Seem counter productive.

Why are most of your axle torque limiting settings LOWER than stock? By about half as much as stock in some. I see you have axle torque "disabled" but only doing that doesn't always kill them all by default. Thus they should still all be maxed out in the individual tables too.

Also try setting B6609 to zero instead of the max value you have it currently. Some truck OS need it maxed to disable (640 ft lbs), others need it zeroed. I've seen them both ways.

There's a lot of meat left in your spark tables with running 93 oct. We run 91/92 (E10) here and the 6.0's like a lot more timing in many of the areas where you're running very little. Burst knock table needs reduced too. This is one table that assists in low speed hard throttle transitions. Like say trying to spin the tires. Need to for KR during full throttle downshifts afterward though.


Joe- the "upside down" TCC tables are the way the 4L80E trucks are. Every one I've seen at least. Same with the upshift/downshift points. They're often "upside down" (from the typical car calibration) too.

i jus set it that way with the rev limiter. Should i turn it back on?

I never noticed the torque limiting. what tables?

i'll try the b6609 table setting

i don't really know how to adjust a spark table that much. i just know how to add spark to the whole high/low spark table. could you help me with the tables?

[kylelavergne]

i'll post my improved tune later today with another log. for some reason though my truck started running hot since last night. if i get in it it jumps in temp. other than that i love the improvements!! truck has a little more low-mid range power. you can feel a little improvement. take off is still about the same.

[bmd2_colo]

Interesting on the burst knock stuff. Read up on that last night, good info

[kylelavergne]

Interesting on the burst knock stuff. Read up on that last night, good info

Ya i know. I wish i knew how to fine tune spark tables