Or use this to make a video of what you are doing

http://graphicssoft.about.com/od/screenrecorders/ScreenCams_Screen_Recorders_for_Windows.htm

 Good stuff Hilly!...........will be interested to see your next results..........especially how you went with step 14!

Even though this will vary for every different bike, it will be good to maybe have a starting point!!

You are making it hard for me not to have a go adjusting these EGRs while I vtune!!!

Burto.

Burto

Just do it, your not going to hurt anything. Look at the amount of change you think you want in the VE value and use a 2:1 ratio for the EGR value. This will get you going the right direction but will not be right on so to speak. So if you want to lower a ve value in the EGR area let's say 10%, then you would lower the EGR table by 20%. Just do not forget that you can raise or lower the values by doing this change in the EGR tables as sometime raising a value will get you the smoothest over all VE table and that is what your after.

 OK you Fargin Iceholes!!

Gonna try another vtune 2morrow after adjusting my cam to #2......(gotta watch out for those highway patrolmen that may or may not invade my "closed circuit" with their double demerits!!).

The limited tune I have so far obtained shows no need for EGR variation so I will do another with AEs and DEs, etc. zeroed and hopefully get a wider ranging tune. Then I can check the EGRs and take it from there!

Got a week off work so can take my time a little, maybe just 1 vtune run per day and then play with that........Gotta learn not to be so impatient, trying to do it all in 1 day!!

Stay tuned!

Burto.

 OK............Did the vtune run today as described last night.

Here is the resultant tune and the EGR results.

As you can see I got a lot wider result today (AEs, ADs, AKR zeroed this time) Pretty well stayed at it till I hit every possible cell!

I have overlaid my 60kpa line to it (hopefully correctly!) and have highlighted the main cells that appear to need some work........mostly lowering to level off to the cells just to the right of line.

Anyone tell me if I'm on the right track please!!!!

Burto.

 Another question for you Steve Cole...........

I may be getting off track here but is there any reason why we can't just vtune until we get the optimum tune without adjusting EGRs ..........and then just adjust our VE tables to eliminate those unwanted peaks and troughs. Sounds too easy! so I guess if that would work then you guys wouldn't have gone to the trouble of the EGR tables.

Just wondering how that would or wouldn't do the same thing............ I'm thinking that maybe what we see changing in the VE tables after EGR adjustments is not the only change that takes place, ie. other adjustments are occurring in the background that we can't see........and by just adjusting VEs at the end would not provide the same thing. I seem to recall reading that you only use the VE tables as a way of judging the changes made.

Hope you can understand where I'm coming from!

Thanks,

Burto.

No, it doesn't work like that. The ECM needs to know how much volume is entering the cylinder(VE value) then it needs to know how much of that volume is O2. The EGR part is working on this portion of the calculation while the VE value is the overall volume. Hope this makes sense to you now.

 Thanks Steve!

Well it's gone a bit quiet on this thread........but I will keep plodding along with what I think is one way to work out this EGR stuff!!

I did another vtune after adjusting the EGRs on those areas that I marked before. As you can see from the new tune below, I obviously didn't adjust them nearly enough. ... as they only lowered slightly. It is trial and error so will try adjusting by a greater amount next time.

I have spent some more time and energy studying the tables and have decided to adjust a lot more areas to try and get a smoother graph.

Like Hilly did, I have marked in the left columns which way I want to adjust each rev row.......U(up) or D(down).

Before arriving at these decisions though, I first studied each column and found where adjustment is needed to smooth out the values that way. (remember that we need to smooth both horizontally and vertically!)

These areas I highlighted with black. I did this 1st to make sure that when I start to adjust each rev row(horizontal), it does not conflict with what I want to happen in the TPS columns.

Luckily it didn't seem to.

Now that I know what I want to adjust in each row, I just have to work out how much to adjust by! That is obviously going to be some trial and error......which means more vtunes until it gets to where I am happy. I don't really enjoy doing vtune dataruns much!........but it looks like I got sucked into trying to get the best tune I can manage!

Dunno if any of this makes sense to anyone.........I'm not good at describing things in print.......or words for that matter!

Burto.

 Know what you mean about those yellow areas Hilly.........funny! that yellow area to right of 60kpa line from 20TPS to 40TPS has had maximum hits on last 2 runs!

Hopefully if I keep hitting them on next few runs they will slowly disappear........I notice that they have reduced a bit last run.

Will have another crack tomorrow.

I note that you are able to get some hits in the 60% column. Never been able to get any results there! What gear are you in to hit them? Must be a high gear................due to the constraints of my "closed course", I can rarely vtune above 3rd gear in that throttle range and this always results in AFR fault!

Burto.

 Here is the histogram from todays effort.......I hammered the area circled to try and get more hits in that area, as Hilly noted- a lot of yellow there!

This involves a bit of engine lugging and very smooth throttle movements to achieve. Higher gears needed as well.  1st,  2nd & 3rd would not get it without afr fault!

The resulting vtune shows a bit more good info in that area, I've also pretty much got every cell, bar a couple in the rear, down to 5% or less, so I'm pretty happy with that!

My EGRs have only changed very slightly so obviously I need to up the percentage of change. I will try another run after increasing the EGR values only in those rows marked. I am happy enough with the rest atm.

It's starting to get a bit tedious! (for me anyway)  but I will continue a little to see if I can improve it some more.

The bike is running great as far as I can tell, but I haven't ridden much except while vtuning. I have a decent ride lined up later in the week, so will get a better idea of how it runs after that.

Burto.

 Hilly.......that peak you have at 4500revs/15tp on the front...........should we be trying to smooth that by either lowering it, or building the adjacent rows up to it?

Just asking cause I've got some similar things happening with mine.

Also.......your adjustment percentages are heaps lower than what I have tried so far............my 1st couple of attempts, i have tried between 10 & 40% with little change! Next run I will double up previous adjustments!

I know it is sposed to vary with each different build......but that seems to be quite a big variation.

Burto.

A much more technical (and probably accurate) method to mine!

I don't have Excell spreadsheets on this puta, so I print and sorta guesstimate with the help of a ruler, calculator & a bit of the old "Italian level"!!

I am also not too patient so I err on the side of "give it heaps" and then backtrack if I go too far!

So far with my "aggressive" approach, things havent moved too far..........so I wiil double up and see what happens!!

Burto.

I think you blokes are chasing something that yop are never going to catch