i succeeded in corrupting my well-used program and have looked/searched and somehow have managed not to find a link.

i would appreciate the link and think it ought to be a Sticky.

thanks,

howard coleman

 

Is it the one that just has three sections in an Excel file that you paste your AFR in from the DL, then adjust to what you want to have as the target AFR, and it shows in the third section what to paste in to the correction table?

If so, I can post it on my site and provide a link if that is okay with Chuck. Chuck?

 

I guess someone else has posted what I'm talking about:

https://www.rx7club.com/power-fc-forum-47/excel-template-datalogit-646519/

Is that it?

 

rx7nut13b (Chuck) said he never received my notes package that I sent him but his worksheet is very similar to the one included in my package which was created by Barry Bordes.

 

Howard and Chuck,
Here is the latest version, with two worksheets and instructions.
Barry

 

thanks respondents.

i found that as i pasted, my paste was set on formulas not values proving i still have a few things to relearn re the computer. not a surprise. perhaps the links on this thread will help someone down the line.

back to tuning.

hc

 

Howard, when you paste on datalogit pages the entire target size has to be highlighted. In Excel only the left-upper lighted cell is needed to pasted.
One trick, to highlight the entire datalogit page, click on the left-uppermost corner of the page and it will select the whole page.
Barry

 

Question for you guys. How do you determine the correct target A/R's? I have played around a little with it and found by using the one above I am in row p16 and already at 17.5psi (verus the 10psi listed). So making me a bit to lean in those rows. I have for the time just built my own target numbers and made them rich to be safe.

Also I notice I can not get my idle any lower than 10.9 to 11.2 at 1000rpm. I have pulled tons of fuel and no change. I am guessing it is the 1000cc inj's. So is my only solution to idle it a bit higher?

 

I think the P-rows for the above are assuming you rescaled your map to read in the psi stated. I would just take your 17.5 and run the matching psi row AFR's, which should be about 10.9. You can always change the middle charts AFR's to what you want and it adjusts the output correctly.

For the idle AFR's the PFC will only take out so much fuel at idle, which is one of the reasons the 850cc primaries idle so rich. So having 1000cc would be just as bad. Mine idles about what yours does. You can take and change the lag time on the injectors and that effects the afr's but will mess them up throught the rest of the map if you don't adjust the whole maps afr's. I just suck it up and do like you and idle about 1000 at 10.9 or so and don't worry about it. It does seem to drop the idle vacuum some also compared to a normal idle afr.

 

A couple of tips.

Only auto-correct with Excel in boost rows P10-P20. Always confirm changes by checking graph for crossing rows (none allowed).

Use the Commander to set mixtures around idle and cruise. Use map trace and drive very smoothly not allowing acceleration functions to come into play. Maptrace shows which cells are rich/lean. Use a paper chart to pencil in AFRs.

Not all of the lower rows can be adjusted. While attempting to lean rows P1, P2 and P3 look for a greater spacing being set up than that of P4,5 and6.(indicating that the lower rows are not responding). Chart and readjust rows to a more even spacing (remember it will try to average adjacent cells)

Barry

 

I use an older verison from Barry, and use it for all AFR tuning except idle.
My PFC MAP REF ABS values are not stock for boost above about 6psi, and I have modified his worksheet to contain all of my own AFR targets for each P row.

It works perfectly if you understand the PFC, DL, and AFR tuning. It is not for beginners who do not know what they are doing.