Ve tables with dual lambdas

I just wonder if its possible to have 2 tables to controll the lm7 with 2 diffrent banks? or how is this done with 2 lambdasonds? trying to make sense of the new emu pro before getting my car ready to start :smiley:

Hi,

You have several options for setting it up.

For VE, you can use one table, two separate tables (one for each bank), or one main table plus a bank 2 correction table. You also have to assign cylinders to banks. For LM7, you would assign odd cylinders to bank 1 and even cylinders to bank 2.

Lambda sensors are assigned separately to specific cylinders, not banks. Lambda 1 is for cylinder 1 and bank 1, so it’s assigned to odd cylinders, and lambda 2 is assigned to even cylinders.

yeah i have seen it but havent found how to get the separate tables, its setup with bank 1 - 1,3,5,7 (lambda1) and bank 2- 2,4,6,8 (lambda2) with injectors and lambdas

would it be recommended to use something else then map/standard pressure to map a N/A v8? using dbw and have a Vag 3bar mapsensor, but since it wont build boost pressure do i need to map with TPS?

MAP is recommended in most setups.
TPS is recommended if you don’t have a common plenum after the throttle, such as with ITBs.

So its only a correction based for the lambda2? or have i done it wrong :upside_down_face:

this is my base map i have tried put together

e91 lm7 startmap.emupro (31.3 KB)

It has nothing to do with lambda corrections.
Closed-loop fueling corrects each cylinder, regardless of how the banks are set up.

Two VE tables let you calibrate differences between banks.
So if one lambda is making 0 correction and the second lambda is +5%, you can adjust the second bank VE so the lambda is on target without extra closed-loop corrections.

If you use ā€œBank 2 baseā€ mode, the second table is a base table with the second bank’s VE value. It’s an absolute and separate VE value, not a correction.

So in this mode, you should start with both VE tables identical. You can save your Bank 1 VE table to a file and load it as the Bank 2 table.

But if you are tuning from scratch, you should start with a single VE table. And after most of your VE table is done, you can enable the second table and do fine-tuning to make the banks even.

okey thanks alot :smiley: then i know and can get this done when the car gets on the dyno

isnt used to how to make the tables, but now i know how to make it a 3d table like base 1:D

You might want to check the EMU PRO software guide.
It’s available on the product webpage and explains how to use the client software.

You can also right-click inside the table, save it to a file, and load it into another table. This lets you copy a VE table from bank 1 to bank 2. Including axis configuration.