RomRaider

it's done, thank you

I carried out new tests and I have three different results

If I use IPW (4-byte), I have a result of 610 cc/min and 0.91 ms, I do not think that it is good.

I calculated IPW Direct
1) IPW (4-byte) - IL (4-byte), I have a result of 612 cc/min and 0.10 ms
2) IPW - IL (4-byte), I have a result of 610 cc/min and 0.09 ms

Here the file
Closed_Loop_Fueling_STI_X_EDM_V3.zip

Thank you for your infos by advance

You need to give me more info.

Is this car completely stock?

If it is completely stock, you should stop trying to adjust the injectors and adjust the MAF first. You have to assume one or the other is correct. You can not tune both at the same time.

Also, you are logging too many parameters which causes too long of a delay between samples.

My car is not stock.

I have an equal APS collector and an exhaust Invidia

I have only parametres in the file, but made with an old laptop

There is no logging definition for CL/OL Status in the RR definitions i have, therefore i enter debug mode everytime I try to view my data. Help.

Here is my log, my car needs lots of work, its driving like poop.

All cars have CL/OL status. It's not a SSM parameter so you have to turn the car to the on position so that romraider can determine your ecu.

The first thing you should do is make sure there is nothing physically wrong with your car.

I only took a brief look at the logs but I can see there is a problem right away. You are driving at constant 2400 rpm and 0.8-0.85 g/rev but your AFR correction is slowly dropping from +22% to -12%. If this was tuning related, steady state driving should result in steady state AFR corrections.

Normally, I would suspect a band O2 sensor but you have logged LC1 as well and they match. Therefore, it's not your sensor.

I would look for a post MAF leak.

Will do. Could the Big Maf be causing such erratic a/f learnings, or is this definitely something mechanically related.

You were correct, the place I tapped for my meth injector nozzle threads stripped, nozzle was wobbling around in there. Plugged at the moment will weld over and redrill and relog. Thanks.

Most times the piping used for intercoolers etc are to thin to tap and generally you have problems. If you are trying to mount any nozzle (NOS, Mewth etc) in thin intercooler piping you are best off welding on a threaded bung (or at a minimum some more metal to increase the thickness of where you want to tap a thread).

^yup, just had them patch weld the section for the old nozzle and weld on a new piece in a different section so i can tap it and have more threads to work with.

Mickey,

Your spreadsheet is great mate, however I would really appreciate it if you could add a few extra features

1. Add the ability to filter by temperature. This will help immensely for tuning MAF compensation table. Easiest way would be to have min and max IAT fields, whereby users can input the min and max IAT they want to use.

2. The ability to calculate closed loop (as it does now) AND open loop. The easiest thing I can think of would be adding the higher MAFv ranges to the sporeadsheet, then using a WB02 data (lc1) instead of stock 02 sensor, and then use filtering so that only 100% throttle data is used for open loop calculations.

3. A MAF scaling tab - basically so the user can add their current MAF scaling table, and then after the spreadsheet has finished its fitlering run, it displays not only the suggested changes as it does now, but also shows a modified and corrected MAF scaling table that the user can copy/paste back in to RomRaider. This would save huge amounts of time having to manually calculate each value in the MAF scaling table.

If these could be implemented, that would be great. If you are a little too busy to do them all, feature 1 would be most helpful as there is nothing currently available to assist tuning the MAF temp compensation table.

Regards
Leslie

I have an 05 wrx and have been trying to scale my dw 750cc injectors. i have the stock airbox/ turbo inlet. invidia up, cobb 3' TBE, vf48. at first my latency was off. after a few suggestions by other members i feel like i am close to where i need to switch to tuning the maf. however i can't decide which revision of the rom to stay at because they are all so close. also on another note, on the injector scalar tab it suggests 800 cc? but then it says to reduce latency as well. wouldn't that push everything leaner? where should i stop!!! and one last ? why do my maf check #1 looks so jagged?

I might have missed it, but is this sheet essentially the same as the logic used in Airboy's sheet? If so, I guess it is easier to just use his sheet to help tweak injector flow rate and latency.

Any thoughts?

Mickey, I need some advice mate

I'm having a prob at the moment rescaling my MAF for my new "big maf" intake. I've spent about two weeks on it now, trying to get it right and nothing seems to work.

I've even gone back and started with various suggested latencies and then rescaling but in the end I have the same problem.

The problem: Regardless of injector latencies used and time spent rescaling MAF using your spreadsheet or the RR logger's MAF tab, I am experiencing light throttle lean periods that cause AFR to swing rapidly and the car to stumble. Basically, if I drive at medium speed (say 40mph) and I only use light throttle to maintain speed (less then 4%) AFR corrections will swing to max positive correction and AFR will go to around 17:1 andd as a result the car stumbles.

If I then correct that point vvia MAF scaling, during normal driving I have a massive rich spot and AFR corrections will swing to max negative correction and AFR will go rich.

I have checked the ROM for some type of MAF throttle compensation, but found nothing suitable, only MAF load comp which is not ideal as it will add that comp everytime I hit the specific load that the comp is applied to, and I only need it at very specific throttle %.

Anyhoo, so my thinking is that it is one of the following:

1. Wrong injector latencies - although I have tried everyuthing under the sun and nothing worked
2. turbulance in MAF piping due to increased size - although no one else has mentioned the same problemm I am having
3. A faulty sensor - although I have a fairly new MAF sensor (less then a year old and cleaned regularly) and my oem AFR is inline with my LC-1 in CL

Any suggestions on where to start to correct this? Maybe a comp or fuel table or something? Or shoiuld I ask Merch if he knows of any MAF or fueling throttle comp tables in any other ROMs that may not be defined for my ROM yet?


Leslie