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I went for my first drive today (15mins) while logging with tunerpro to adjust the ve tables.

All went well with the recording, I had the ve's sort of spot on at idle and low revs as jacked the back up and had the wheels going to get some low load and such done.

So after getting a good log, I sat down with the calculator and read the wideband cell data then divided that number by the desired AF and gave me a number. then I multiplied that number with the actual ve table and gave me a new correct ve to put in each cell.

I sat there for a fair while and when i had finished i hit the upload button and it didn't go. I tried the upload arrow/didn't work either... so i thought gee, i might try to select all the table and save it to my clipboard in case something happens and i lose it all. yup, she crashed and i lost the lot. I noticed towards the end of my work on the ve table i had a few cells around the 105% mark in the higher revs and loads.

Did it fail because i went over 100 in some cells.? i didn't save/upload as i went, i just left the cells red untill i finished so i knew where i was up to.

So now i have to do it all again but this time i have changed my kinflow/displacement scaler from .14 to .20 and see how i go tomorrow.

would making it to .20 make the ve table numbers go lower than today? is this what i want to do. 775 bluetops old ones and 383 cubes

with it set on .20 I am in the 45-50%ve map40kpa at idle and around 14AF comanded and given. as i put my food down it leans out quickly because i have a twin throttle and more air can go in at a low throttle open %

is this the right way by changing the kinflow to a higher number to make the ve table numbers smaller? I dont want to go over 100% again and crash it after all the work.


thanks

I have the spreadsheet for the ve table calculator but no instructions for it. does anyone have the link for the instructions.. it might make the job faster. thanks

Yeah ,thats right ,make the inj rate bigger ,lower the ve .

After i do the ve table, what AFR should i make the 20-100kpa map.

I was just going to take a 4 cell block where it idles and set that so it sounds good (richer than stoich)

then have say, 14.7 at the squares where i am at light load cruising.
and from about 60kpa and up in all revs 12.5.

is there a way to figure out what AFR to make to table or do you just make it something like i said.
The car doesn't seem to like 14.7. even at light load. there is a slight pop in the muffler but goes away around 13AFR
but then it uses more juice... sigh,

the car felt a bit gutless today, I set the ve table extra rich accross the board so i could get up it and not worry bout leaning out or ping etc. it was around 12- 13.5 whole log.

for the spark I'm just using the table that came in the download for petrol v8blcf. is it fairly conservative spark as standard?
the car felt gutless. well not real gutless but less power than before when i was running the crow stage 3 kit chip.

ok crash course

what you need to do with the wideband converter.... get a histogram of the wideband AFR's in your log.

then paste this into the spreadsheet in the "wideband log" section.

if your histogram is not the right axis adjust it to be the same but it should already be right for $12P petrol.

so then you need to get your current ve table out of the tune and paste it into the spreadsheet under the "current ve table values" area, note this only goes to 6400 rpm.

now all you should need to do is paste the the numbers from the "new ve table values" section into your ve table and upload to you ecm.

also remember to have a look at the changes using the graph, look for any massive spikes or such and smooth them out to be close to everything around them.

also somethig to note, normally when i do this i use the histogram is "running average" this seems to give the most consistant results with less chance of having massive high or low numbers.

do this a few times and you should be able to get the tune fairly close.

also note, if you hit a certain load point where the car is struggling don't change the throttle to get through it, leave it there for a bit so it will get plenty of time to get a good solid reading on that point, that way the results will be more accurate, also try to just drive nie and casually and smooth, no huge throttle changes as they will induce accelerator enrichment which will skew the results.

another thing that helps, just set the laptop logging and don't look at it, the more you look at what its doing the more you try to get it at certain load points and generally i've found just driving around without looking will give you the best results.

to work out what numbers are supposed to be in the right cells for the ve table (the commanded AFR's) look at the table called "Map A: A/F Ratio - 20-100kPa Air Fuel ratio vs RPM and MAP"

you want to get the wideband reading the same as whats in that table!

also if your using the wideband converter spreadsheet, it should already have the right AFR table in it, but check it with the numbers in your AFR table and make sure they are the same.

Thanks mate,

I'll give it a go tomorrow.

My maps go way up to 9000 rpm but i set my rev limit at 6,000 . most of my tables are wasted.

in my ve table it goes 2800,3200,3600 4,000, 4400, 4800,5200,5600,6000.

wouldn't it be better to just have it go from 600rpm up to 6000 by 200 rpm incriments. rather than the big jumps and wasted map above my rev limit? can i change it or is that just how it is?

The spreadsheet converter goes up by 200rpms but my histogram is the same as my ve table with the big jumps. will i have troubles because of this? with pasting it in?

Thanks

Holden202 wrote:to work out what numbers are supposed to be in the right cells for the ve table (the commanded AFR's) look at the table called "Map A: A/F Ratio - 20-100kPa Air Fuel ratio vs RPM and MAP"

you want to get the wideband reading the same as whats in that table!

also if your using the wideband converter spreadsheet, it should already have the right AFR table in it, but check it with the numbers in your AFR table and make sure they are the same.

I know i need to get the ve to match the comanded afr but the commanded afr is what I wasn't sure about what it was supposed to be. I played with it on the 20=100 afr table.. should i just put it back how it was in the download with mostly 14.7 then goes down to 12.5 in the higher map numbers.

have a look at the area where you paste your histrogram in, you'll find it goes up in 200rpms too!

and no you can't change the axis, just use what you need and disregard the bits above it .... the higher rpms are to cater for people with other motors, like high revvings 4 cylinders etc.

Holden202 wrote:have a look at the area where you paste your histrogram in, you'll find it goes up in 200rpms too!

and no you can't change the axis, just use what you need and disregard the bits above it .... the higher rpms are to cater for people with other motors, like high revvings 4 cylinders etc.

The wideband log in the spreadsheet goes up by 200 rpms but is that where i'm suppoesed to paste in my histogram? my histogram doesn't go up by 200's all the way... it has the big jumps.