Did you look at your AFR when you went out of closed-loop?
That is where maladjustment of the MAF does the most "damage" and its a big part of getting the calibration right.
On the race cars, I disconnect the front O2 sensor until I get the MAF right on the dyno. This forces the car into open loop all the time.

 

I only went into open loop when I was confident that the "bad" values I had entered weren't bad enough to blow something up (erring on the rich-but-not-too-rich side). Obviously the AFR was off at first, but eventually the LTFT put it close to on target. I'm not saying it's impossible to blow an NA engine, I just don't think anybody that has even a rudimentary understanding of how the PCM deals with fueling is going to have any problems.

 

The fuel trims don't count in open loop.

 

Short term doesn't, long term does

 

Actually, no.
It should - by definition - but it doesn't.
Try it out, you will see that LTFT is nullified by the other fuel calculation.

 

Odd... once I started getting appropriate LTFT values, my open loop AFR seemed to fall more or less in line, exactly like I would expect

 

i believe it carries over the highest LTFT for open loop

 

In theory. Not in practice.

 

This is off topic but I just recieved the latest reflash from Mazda and I was wondering if there is a way to look at the Mazda flash that is saved on the AP. Basically I want to use the oil metering portion and apply it to my Cobb map.

 

Does anyone know if this can be done? If I can't get the stock data I will increase the oil percentage by 10% across the board. Any input would be appreciated.

 

Why wouldn't you just use the stock Cobb map? Pretty sure that uses all stock values and is based off the lastest (year+ old) flash.

 

you cant just pull the map from the access port into the race software and look at it?

 

that would be the "stock" map that cobb gives you and you can open....

 

Thanks, I will use the Cobb supplied stock map.

 

Is it possible to trick the MAF sensor into seeing higher g/s than what is actually passing across it?? For example, if I set it to 263 g/s at 4.06 volts and then see 260 g/s at 4.06 volts on a datalog, is that accurate?

 

So no one knows, or nobody cares??

 

You can tell the MAF to show whatever you want.
Just pick a voltage and assign a value.
Of course, you are going to completely obliterate the tuning and have to completely restructure the fuel and timing MAPs for this new (and incorrect) AbsLOAD value that will be generated by the MAF.

 

I have a few questions...

1. I am trying to change my oil tables and when I use the multiply and use a value like 1.1 (add 10%) it only changes if it reaches the next integer, is this how the OMP table is? No fraction, all integer?

2. Anyways, anybody has a good map for the OMP for FI and 2-stroke oil injection (Richard Sohn adapter?)

3. I changed my FAN 1 - A and FAN 1 - B both from 97c (206.6f) to 85c (185f), should I change FAN 2 - ECT to 85c (185f) also?

Thanks In Advance.

 

If that is the case, then how does one know when the MAF is showing accurate flow numbers?? I don't know much about MAF sensors BTW.

 

I went ahead and changed FAN 2 - ECT to 85 also, figured if I want to stay in that range and quickly then use both fans, that way both shut off at same time, stay on for less time.

Still would like to know what's the best map for OMP using 2-stroke oil and FI, anyone have a screen capture or excel table that would like to share?

 

Scaling the MAF. I know it was asked here.

https://www.rx8club.com/series-i-engine-tuning-forum-63/how-scale-your-maf-flash-tuning-cobb-hymee-169597/

 

Where are all the controls for the SDAIS in the Accesstuner? There are some valves tables missing. Plus, on top of that, my "Stock" APV map of rpms at which to open are zeroed at all temps greater than freezing. That cant be right.

So I see APV Open RPM's values as mentioned
VDI Open RPMs and hyst; 7250 RPM and 188 RPM
and VFAD open and hyst; 5250 RPM and 188 RPM.

No SSV at all.

 

Only in PRO version.

 

So SSV opens at 3750 as in the stock map?

Does the PRO version have more control over APV? Why would you want to control APV on ECT? Does moving my APV from the values I described to RPMs around 6250 sound like a resonable plan (based on some data within this forum)?

 

I was pretty sure LTFT did affect open loop because I thought i saw it do just that - what is this "other" calculation ?