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Yes please...........I have sent an pm

We have just fitted one to a standard Monaro VXR and we pull 430hp...............with a good tune.

The maf table may need a small amount of work!

we have just finished setting up the Z06 maf (a little more work req on the curve) and we can now pull 28deg advance from 4400 up to 5800rpm (100kpa)with no timing pulled. ;D

The new maf flows...

I did all the runs on the stock setup and when this problem would not go away I fitted the 85mm maf as I thought it might have sorted the problem......

I will try a ZO6 85mm maf next just to check...

Just for comparison I have changed to a 85mm maf and retuned the maf table (and VE)and this also pulls timing at 10000Hz

By the way a Granatelli 85mm maf has the same Maf table as a standard 73mm...

The timing only gets pulled when using the maf.... in SD there are no problems...

temps on both runs are the same................

I have removed all spark retard from tables such as ECT,IAT etc...

I have been working on a Monaro and have produced a car with a very nice tune.....

The VE is spot on and it always produces commaded A/F when in PE but I keep coming up with a problem......
...

I have just about given up on my 1999 Holden because of the two tables....

I have just bought a new PCM and I will replace the whole OS to a 2004 version (when we get PRO!!!)

United Kingdom........................ :cheers:

Chris..............when tuning the VE table to zero I asume this is approx an A/F of 14.7 as this is the figure best for emissions. So the PCM does not trim the fuel....

now when I tune with my...

ahhhh you said the magic words "Burst Knock"....

I have been suffering with burst knock when my VE table was spot on (spikey)and by smoothing the table the problem reduced..........

I have just...

Chris..... if I end up with a spikey VE table (like the GTS) after tuning the table I should not try and smooth the table out?

Chris....excellent explanation/analogy

Now we know how the VE works can we move onto the profile of the VE table....

My understanding and experience says a smooth VE gives the car a smooth feel...

My 1999 Holden has two VE tables................

When sorting my LTFT I found only the Secondary table made any change but it only has half the amount of cells of the primary, so when I had good...

I have been logging and changing my VE table according to the figures in the LTFT's histogram view........

The problem is I have added to the VE table upto 15% and the LTFT still show (2-5+) red)...

My understanding of the process of tuning with the aim of keeping the MAF is:

1. disconect maf (un plug)
2. log various runs of over 15mins (start logging after car is up to temp)
3. record the...

I am in the process of changing my VE tables and would like to check the above post.....

Are you saying I need to log the LTFT with the Maf disconected then change my VE table, up load and then...

"Dellz06" thanks for your imput......

The LTFT Histogram was only for example and over the last few hours I have been driving around making 5 logs which have as many cells as poss filled (avoiding...

Thanks "Dirk Diggler" for you help :cheers:

Looking at my data log of the Dyno session WOT seems to be above .60 gcyl @ fuel trim cell 22 so I will avoid making changes in and above this area.
...

Now I am on a roll with questions...here is another.

If in the future I move to a MAF Less set up am I right in thinking that it is the secondary VE table that I make the changes to?

Cool ...I am starting to get the idea.....thanks

So my action for this sample cell should be...

87 x 1.07 = 93.09 (or 87 x 1.10 = 95.70 if I am trying to get negitive numbers across the table)...

Thanks for that...........

Just to make sure I am doing this right, this is the process I am using shown below.....

Origional VE shows 87 at 100k/Pa-4000rpm and the log shows an average of -7...

Sorry more questions.........

I have a log file showing various cells with 5 and more when viewed as an average.........(see above)

now if I find the same cell in the VE table it shows 93 am I...

can some one give me some pointers on how to achive this advice.......

Over-rich can come from an error in the air flow (MAF,
at WOT, usually) or the fuel flow tables; it can also come
from...

I have looked at the "Open Loop Fuel/Air vs ECT vs MAP table" and the range I am operating in shows 1.00 in all the ECT columns.... which I understand means no addition is made... so I have produced...