RomRaider

mickey,

on page 1 of this thread, you mentioned the following steps as part of tunig OL:

2. Open loop low range using WBO2 and 5th gear logs with about 50% to 70% throttle and WGDC = 0.
3. Open loop middle range using WBO2 and 3rd gear WOT logs and WGDC = 0.

How do I set WGDC = 0? Do I have to make any changes to any parameters in my ECU or is it how I drive?

Also, do I log the same parameters as CL and then use the same spreadsheet to analyse the corrections (in a smiliar way as how it is being done for CL) to determine the changes that I need to make to my MAF table? Thanks.

Just fill your entire your MAX WGDC table with zeros. Or you can change your Global MAX WGDC to 0.

When the MAF is changing rapidly, there are transient effects which aren't always captured due to the low sampling rate of the logger.

The objective is to scale the MAF using near steady state values.

For open loop fueling, your STFT will be zero and hopefully your LTFT will also be zero. You will need to scale your OL MAF table using your LC-1 plus Airboy's spreadsheet. I believe someone else has posted another spreadsheet that explains how to do this. It's pretty easy. Just look at AFRs.

I'm running an external boost controller (Blitz SBC-ID). Does it matter if I set WGDC = 0 or not?

No. But you'll essentially want to "turn off" your EBCS. Whatever you need to do to make it run WG boost only.

So you mean that my EBCS should not be controlling my turbo boost levels, right? But I don't think I can "turn off" my boost controller, aside from disconnecting it right?

Just change your ebcs to 1 psi. Then your boost will end up being controlled by the spring in your wastegate actuator.

Basically, to scale your mid-maf scale you want mid-value constant maf. In order to get lower maf, you need to lower boost. You can either reduce throttle or just cut boost. Cutting boost is the easiest since you can just do a WOT log with boost

mickey,

since the new maf/injector scaling features on romraider is based on your spreadsheets, how accurate is it compared to the steps you have listed on the first post of this thread?

when should i use your method over the romraider maf/injector scaling features? does the romraider maf scaling covers both OL and CL maf scaling?

I actually haven't tried the new tabs in romraider. In theory,it should be the same. I've looked at people's plots and they look similar to what I would expect.

The biggest difference is that it doesn't appear to be able to combine data from multiple runs.

Ok, so one should still analyse the data collected and not just apply changes immediately, right? I thought there were built-in algorithms in romraider that helps in making such decisions...

I think I'm almost done with scaling using the following steps:
2. Open loop low range using WBO2 and 5th gear logs with about 50% to 70% throttle and WGDC = 0.
3. Open loop middle range using WBO2 and 3rd gear WOT logs and WGDC = 0.

Now, I'm planning to move to the next step:
4. Open loop high range using WBO2 and 3rd gear WOT logs with normal WGDC and normal boost levels. For this, I change the arbitrary AFR target to 10.5 to be conservative since MAF is unknown.

When you say "change arbitrary AFR target to 10.5", do you mean
a. changing all those cells that I've changed to 11.0 for Steps 2 & 3 to 10.5
or
b. do I change ALL the cells to 11?

When you are doing WOT at maximum potential of the turbo, I like to target 10.5 as a start just in case there was a mistake.

For example, if you target 11 and you were 10% off then you would be at AFR 12 which might be dangerous.

For the mid-range, you can get away with being slightly leaner.

So this should be ok right?

Yeah. That should work with a WBO2. Don't keep that map too long though. Gasoline is expensive.

Thanks mickey. Yeap, gasoline prices are emptying my pockets fast. Hope to get all the OL scaling done soon.

Ok, I just did about 20 WOT 3rd gear pulls. On 2 of the runs, I got a P0244 CEL which basically means 'Turbo Wategate solenoid "A" range/performance high'.

I've done a search on the forum here and some says this is a sign of boost creep. Could that be what is happening here? But why does it happen on only 2 of the runs? My boost controller didn't show that the boost hit more than 1.7 bar..(or maybe I didn't notice but the max boost shown on the boost controller does not indicate that either).

Some info:
1. I'm running on 1.7 bar of boost (which is what my car was tuned for on ecutek before I switched to romraider).
2. I've NOT changed anything else in my map other than the MAF scaling table. (I've reverted to stock settings on my WGDC and my AFR target table is mentioned in my earlier post).
3. My car is a Euro STi 03

What could I be doing wrong?