We have 330 load at 1.4 bar (20-21 psi) too. The MAP Omni 4 bar, GTX3582, ID2000 .
In what the problem? Anybody can to help ?
The my rom and log here .
Thank you!

 

You do not need to log 2 byte Load and 2 byte RPM any longer, RPM and Load1b is will work great. Ignore any differences

You need to do a little more logging to properly build the VE map. Read the posts in these 3 links.
https://www.evolutionm.net/forums/10572022-post39.html
https://www.evolutionm.net/forums/10658198-post552.html
https://www.evolutionm.net/forums/10659016-post556.html

You do not need to log all the extra items, this will speed up the logging capabilities.

Set your MAP Sensor kPa to this:
0-0
20-20
40-40
60-60
80-80
100-100
200-200
400-400

Set your MAP Sensor kPa to Load to this:
10-10
20-20
30-30
40-40
60-60
100-100
120-120
400-430

Set your injector global scaling to 1624, set the fuel map at wide open throttle to 11.0

The reason your car is running so rich with lower scaling is because you have such high numbers in the VE map and the values are not set to what they need to be. When you have the VE set then go back and adjust the fuel map to reflect the proper air fuel ratio.

 

evo8426
Thank you a lot!! This info is very useful. We will try!

 

Donner has found an error in the 3D SD ROM for Evo 7s. It's pretty easy fix, but has a large impact, as it corrects the reading of the RPM scale.

"Here's fix: Find table "RPM Axis" under "Speed Density Programming" and there you see hex value 8962. Replace it with 0x883A. Done."

Picture shows the corrected ROM.

 

That would explain why this ROM wasn't working for anyone.

 

I believe there can be more errors. For example in 9653 rom. SD 2.0 is used by just a few people. Pro tuners usually use old 2d SD and doesn't deal much with 3d sd. So we might have not enough statistics and testing to reveal all the errors.

 

It was only .5 lean for me on WOT and I changed turbos and went back to MAF after swapping, which is why I never really got too far investigating why the AFR was not moving with VE. Shows that if the Kpa to load and MAP to volts is good the tune will not be far off.

 

I tried googling but the sea of SD threads is so huge now. Does anyone have a link or remember what values are used to claculate AIRFLOW HZ in SD?

-Jamie

 

I have a same problem on SD - on very low throttle around 1500-2000-2500-3000 rmp AFR is too lean - 20 !
Even on a place in attempt to hold rpm 2000-2500-3000-3500 - AFR is 18-20 .
What can i do?
Thanks.

 

I´ve been mapping mu Evo V RS with a 3D SD rom for Evo 5/6 and it´s running near perfect now. Perfect idle and idle afr´s.

Basicaly you can adjust fuel via the MAF smoothing table or the VE table, but look at your previous MAF logs and see what load and timing you had at idle, with SD you should aim to have about the same load at idle as you had with the MAF and this is done by adjusting VE and will give you the right timing as well. Now if the AFR is off but you have the correct load, don´t move VE but adjust the MAF smoothing table in the 30 - 50 Hz region until you get the right AFR with addecuate LTFT. Be careful to have all VE´s in the table around idle to be not too diferent, usualy just 2 % increment for the next 20 Kpa and the rpm below is enough. My setup it idles at 1100 rpm and about 60 kpa with 56 % VE, and the VE table for the 1000 rpm 60 kpa has 55 % VE, next to it at 1000 rpm 80 Kpa VE is 57 % and below it with 60 kpa and 1250 rpm VE is also 57%; so the idle point is aroud those 3 cells in the table. Right after those points VE starts increases much more.

 

I believe that is infamous Jitter bug.

 

The jitter bug does not affect AFC, it is a very low level jitter ( of course ) that you only feel under specific conditions, you can see it as fluctuation in the IPW during a steady throttle cruise. AFR issues during low throttle are likely to be volts to kpa or scaling or kpa to load

 

So, got SD set up on my JDM 8. Is it really supposed to feel smooth? Because for me honestly, it feels the same as when I was using a MAF rom. I had put a lot of work into smoothing my tables and everyone commented how smooth it drove on pump (was always asked if it was on E85). This just seems like a whole lot of trouble for no benefits with my setup anyway. Being a JDM and not having a IAT other than the MAF (cannot use fuel temp, we don't have it) I can't remove the MAF to check for power/torque gains but everyone always said SD drives so smooth. Feels the same as a properly tuned MAF rom to me

Good learning experience though.

 

You're pretty right. They are equally smooth when done right. It just opens up the window for really big power guys to ditch the maf.

Also I noticed that a popped ic coupler doesn't leave you dead in the water .

 

I have found the main benefit to be the elimination of MAF turbulence. Mostly due to very poor MAF air intake designs out there. It doesn't take much for a MAF setup to feel notchy and jerky under certain cruising conditions, especially when the BOV recirculates. With a really good MAF intake, switching to SD wouldn't 'feel' much different but does remove the restriction on high flowing turbo setups like 211ratsbud mentioned.

-Jamie