c4boom

i have been doing some tuning on my 747 ecm in my truck.

what i have been doing is giong for a long drive 35-50 min and then taking the corection factor that i get and apply it to the the v1 table . i am using tuner pr and win aldl.

is there a better way to tune am i on the right track let me know guys hear is a copy of my fuel table and my latest log.
Wide Correction 10
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 1.000 1.000 1.000 1.000 1.000 1.00 1.000 1.000 1.000
800 1.000 0.935 0.869 0.903 0.943 1.000 1.000 1.000 1.000
1200 1.000 0.850 0.861 0.848 0.886 0.920 0.952 0.980 0.984
1600 1.000 0.844 0.848 0.875 0.923 0.937 0.959 0.984 1.031
2000 1.000 0.844 0.851 0.880 0.880 0.916 0.944 0.968 0.942
2400 1.000 1.000 0.844 0.844 0.863 0.945 1.000 0.956 0.938
2800 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
3200 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
3600 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
4000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
4400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
4800 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
5200 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
5600 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
6000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
6400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000

c4boom

Wide Avg
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
800 0.0 119.7 112.6 113.3 120.8 0.0 0.0 0.0 0.0
1200 0.0 108.8 109.7 111.4 113.4 118.1 121.4 125.7 126.0
1600 0.0 108.6 108.9 110.5 115.7 119.2 122.7 127.6 132.0
2000 0.0 108.0 108.7 111.3 114.9 118.7 121.9 123.1 120.9
2400 0.0 0.0 108.0 108.2 112.8 121.0 0.0 122.4 122.0
2800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
3200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
3600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

c4boom

this is my ve table

c4boom

edelbrock shorties, a comp cam extreme energy cam 12-249-4 with .434 lift intake .444 exhaust and 206/212 deg at .05 this is on a 112 lsa and a holley tbi intake with the 670 on top with 65pph's in it. fergot to add 3 " hiflow cat into flowmaster 50 with 2, 2.5's out the back and stock crappy lo5 heads

dimented24x7

iTrader: (2)

Thats fine, just remember that you also have a VE adder table so the changes to the overall ve will be smaller then the percentage your multiplying by. Not a problem but something to keep in mind.

EDIT: Also make sure that you have at least a dozen or so logged blms per cell that you use so the actual percentage change needed is at least somewhat accurate. For example, if you had a .94% in a cell and there are only two blms sampled for that cell its unlikely that itll be a good measure of the fueling at that point.

c4boom

the adder table is the second ve table right. i thought that was only used in WOT where the o2 was not used and would not affect the blms

dimented24x7

iTrader: (2)

Best Ive been able to tell is that the ve adder table is a space saving measure. The main VE and the adder table are added together to get the overall VE of the motor. If only one VE table was used that went up to 3200 rpm or whatever it is then after 3200 rpm there would be no control over fueling. Having the VE adder table means that the VEs can still be changed via the adder table once the main ve table is pegged.

dimented24x7

iTrader: (2)

BTW, looking at your VE table it looks like its time to move some of the stored VE from the adder table to the main VE table. Looks like some of your VEs are getting pretty close to zero on the main table.

To add to this, you should use the graphing feature to get a feel for what the overall VE looks like. Use the known points to smooth the rest of the values nearby.

c4boom

whitch one is the adder table

Ronny

iTrader: (1)

OK i have seen mixed opinions. i took table 2 which i will assume is the adder and added it in table 1 and zeroed out all but i think the 0 rpm( i forget). the formula to use is posted somewhere and was time consuming when you use 2 tables and plug in logs. my daughter set up an excell table function to calculate but i discontinued tuning ve for a while so have not played with it.
what is the reasoning to NOT zero out table 2. i use TC BTW..

dimented24x7

iTrader: (2)

You could just move all of the VE adder to the main VE table up to 3200 rpms, but after that you must still use the ve adder table or youll be pig rich at high rpms. Thats what that table is there for, to allow you to reduce the VEs at high rpms.

Ronny

iTrader: (1)

i believe i did that. will double check. my WB02 would alert me !

c4boom

i thought the adder table was for pe and the first table was for when your not in PE can some one explane the relation between the two tables

dimented24x7

iTrader: (2)

Alright... Since the prom/rom are jam packed, gm cant use a full sized table that goes all the way out to 6400 rpm. They basically traded some processing time for space savings.

They have to have a small table but still have control over the fueling after 3200 rpm. If only one small table was available, once 3200 rpm is reached and passed, only the last values in the table are used. This would mean that there wouldnt be any control over the VEs at high rpms. If the motors VE went down after 3200 rpm, it would go overly rich since the only VEs teh computer has to work with are those at the 3200 rpm column.

This is where the adder table comes in. Both tables are used at all times. The computer needs teh VE to calculate the pulse width for the injectors. Depending on how you look at it, the VE adder table is sort of like the foundation with the main VE table sitting on top of it. Neither table has the total VE by itself. By adding both together, the actual VE is obtained. The main VE table provides teh necessary resolution to properly calculate the fueling at lower speeds since its based on both rpm and MAP. The adder table is just in increments of rpm.

Once the main table has run its course and the rpms are over 3200 rpm, the ve adder table can be used to still have some ammount of control over the fueling. It can bias the last column of VE values in the main table both up and down.

c4boom

ahhh thank you very much that was exactly what i needed.