RomRaider

I wish I knew what to do to modify that to suit my 2002 STi ROM

Anyone interested in doing it for me :p

Possibly OT: are there any JDM/ADM/EDM cars that are DBC and use a 32-bit ECU (and then possibly this speed density code)?

Just to be clear, when I said a "simple cut and paste" I was only talking about when adding the table definition to the RomRaider ECU definitions. That is not the same as adding the speed density code to your ECU. That task is considerably more complex and only a few folks are capable of doing that.

Ah, only a pipe dream for me then

Well I haven't had as much time as I wanted to work on it. I got distracted because I wanted to add in more compensation tables before I finished the code for 1024KB ROMs (luckily, most code can be shared for all the 1MB ROMs). I wanted to have at least once 2D and one 3D compensation table added. The compensation tables are very easy to reorganize as long as the code is there to suck values in. I.e. it is very easy to change the axis metric and size as long as the comp is already built in.

With winter coming other things in life slow down so I will have some more time to mess with this. I think once I get one of the 1MB ROMs done the rest will not be too hard. There are aspects of the 1MB ROMs that are more consistent, like it is easier to identify free RAM due to the way the 512kB ROMs address using 2 bytes, etc. Plus the MAF scaling routine is really small, easier to hijack.

I've been running this code for the past few months, and I just want to thank Freon for its development and for sharing it. It's very simple and easy to work with and doesn't really require a whole lot more adaptation in terms of tuning process.



I honestly feel that the throttle response from this code is apparent once fueling is retuned and the VE is set. I tried reflashing back my original MAF tune, and there's a significant difference in response that I can't get with the MAF tune, despite playing with tip in.


I also hope the 05 and 06s come out soon, as I have a few friends that are wanting to ditch their BIG MAFs.

I have an '05 also and am really looking forward to this, I'm so tired of my 8.5 :1 fueling on initial boost onset I really appreciate your work on developing this!

Freon,
Is there any reason why my map sensor scaling would change when going from a normal ecu defination to your speed density rom? My scaling seems to be off now. When I log with both my zeitronix and romraider, there is about 1.5-2 psi difference between the two map readings. Its causing my load cells to be off. I have a zeitronix datalogger and map sensor. I was spot on before changing to speed density. any ideas?

Nope, absolutely not.

for those of you who have used the SD map, how accurate are your AFRs after tweaking the VE table? i've been logging and scaling my maf for the better part of the year, and i STILL haven't hit my target AFRs. af learning and correction are within +/-5%, but AFRs (per my LC-1) are still in the 10.x:1 range.

i hope a couple logs and tweaks to the ve map will get AFRs much closer to the targets in the fueling table.

I believe mine will be really close once I figure out why my map sensor circuit has a 0.5 V voltage drop from the sensor to the ecu. I believe its between my utec and ecu.

No problems here. As close as I'd expect.



I'm confused and maybe I'm misunderstanding what you are saying, but it sounds like you are expecting modifications to your MAF scaling table to affect your AFR? That will not happen if you are running the SD patch. You must alter the VE table.

what are your mods? so all you did was log ve, make the adjustments to the ve table, and your afrs were fairly close to what the fuel table calls for?



sorry for the confusion. i meant tuning using maf scaling with my current map, not the ve map. i've been trying to get the afrs closer to the my targets but it's been a pain in the ass!

only reason i ask is my lc-1 is acting up and i wanted to use my logs to edit the ve table and flash the map to give it a try...but i know that's not the smartest idea so i'll hold off until i can check the lc-1.

and another question for freon or anybody who might have the answer, why do you not recommend using the sd map on stock/small turbos?

I don't think the size of your turbo will really dictate how much this hack benefits you. If anything the fact you'll gain throttle response and will no longer suffer from fueling delays stemming from FMICs and MAF Fueling. You also have a more sane/easy upgrade path to any future larger turbos that might peg your MAF.

Only bad thing I can think of is that the VE of your engine will change as it wears. I'd assume this is only minor deviations in VE.

I have been noticing a rich condition every time I shift. As soon as I press in the clutch and let off the gas, it dips rich (11-12 afr at any load and rpm and then it goes lean like it should, 19-20 afr) especially when shifting slowly. When I am in the same load cells and cruising, I don't see any learned fuel correction when cruising. Any ideas why this would happen?