MAF Scaling - Open/Closed Loop Fueling info

[DocWalt]

2.34% is fine on regular fuel (non-ethanol). Stock wasn't even that good for me.

[Boomerang]

Is MAF scaling on E85 after scaling on 98 the same via the vgi tool?


Gather I don't use the 98 scale on E85?

[steve99]

Originally Posted by Boomerang

Is MAF scaling on E85 after scaling on 98 the same via the vgi tool?


Gather I don't use the 98 scale on E85?

You should be avle to ise same maf scale on 98 and e85 on same car with same intake

[Boomerang]

Originally Posted by steve99

You should be avle to ise same maf scale on 98 and e85 on same car with same intake

Thanks Steve, reason I ask is that when comparing tunes in Romraider it seems Waynos have different MAF scales for 98 and E85.
Why is this?

[steve99]

Originally Posted by Boomerang

Thanks Steve, reason I ask is that when comparing tunes in Romraider it seems Waynos have different MAF scales for 98 and E85.
Why is this?

Might be just his way of doing fueling or the injuctor scaling\di pressure adjystments are slightly off

[Dom_J]

There's really not a MAF rescale out here for the injen short ram intake anywhere or a directory on the front page of this guide? This VGI tool is being difficult. I can't even copy/paste the results into RomRaider from the logs.

EDIT:

MAF scales for INJEN and TRD image attached but it'd probably be quicker to use the VGI tool than to hand jam these numbers. Can't attach excel files




.

[Marmarrz]

Originally Posted by trueno86power

Hi guys, I've just crossed this thread. Thanks to all for all the info!


I'm using a OFT Stage 2 tune with my EcuTek software.

Mods: OEM headers/gutted cat - Nameless FP/OP combo - Kakimoto Cat-back

And I've just buy an used Injen intake for really cheap. I know this is probably the worst intake on the market, but still I would love to scale the maf to make it work correcly with the OFT tune.

Just before I loose my time on scalling the MAF on the Injen, did anyone try it with success ?

Did you ever get the MAF scaling for the Injen CAI? My BRZ came used with one so I don't have the OEM intake. I bought an OFT and flashed the Stage 1 tune, but I'd like to try and get the scaling in.

[Marmarrz]

Originally Posted by Dom_J

There's really not a MAF rescale out here for the injen short ram intake anywhere or a directory on the front page of this guide? This VGI tool is being difficult. I can't even copy/paste the results into RomRaider from the logs.

EDIT:

MAF scales for INJEN and TRD image attached but it'd probably be quicker to use the VGI tool than to hand jam these numbers. Can't attach excel files




.

Would these numbers work for a Stage 1 tune? I'm running an INJEN on my BRZ and want to flash the Stage 1.

[c.klingner]

Looking at the beginning of this thread I downloaded the AFE Tekada table as that’s the intake I have. I copied the info into my MAF scaling table and that should be it, correct? Also, I’m currently waiting on a grams 72mm throttle body, can I use this tool after I install the throttle body to scale for the new throttle body, or do I even need to?

[Kodename47]

Originally Posted by c.klingner

I’m currently waiting on a grams 72mm throttle body, can I use this tool after I install the throttle body to scale for the new throttle body, or do I even need to?

TBH, probably easier to just not install the throttle body. The MAF scaling shouldn't be much different, but your throttle mapping will be well out.

[c.klingner]

Originally Posted by Kodename47

TBH, probably easier to just not install the throttle body. The MAF scaling shouldn't be much different, but your throttle mapping will be well out.

So when the throttle body comes in I would need a custom tune then?

[Kodename47]

Well if you want more aggressive throttle then no. Do you swap over the TPS from the OEM to the Grams? If not, you may need to change the voltage that triggers the various CELs (but you may not if genuine Plug and Play). But seeing as there is nothing to be gained by fitting one.... unless you're boosted perhaps I guess.

[Compelica]

Not sure if this is the right place to post this, some may already have been aware but in Techstream there are 4 learning ranges (idle rpm, low rpm, middle rpm and high rpm) for each injector sets. With OBD Fusion and the extended PIDs you can see these values.

Some have hypothesized previously that these are the learning ranges and I was trying to find a method to know if the trims have been fully learnt. I cleared CELs to force the trim to reset, and went on a quick 15min drive to get some food.

When the clear CEL was done the learning values were zero, and during the drive the values slowly picked up. This indicates some form of trim learning has been done but I've no idea whether if it's completed.

Top row are port injectors, and bottom rows are DI injectors. Idle, low, middle and high rpm go from left to right.

[steve99]

Originally Posted by Compelica

Not sure if this is the right place to post this, some may already have been aware but in Techstream there are 4 learning ranges for each injector sets. With OBD Fusion and the extended PIDs you can see these values.

Some have hypothesized previously that these are the learning ranges and I was trying to find a method to know if the trims have been fully learnt. I cleared CELs to force the trim to reset, and went on a quick 15min drive to get some food.

When the clear CEL was done the learning values were zero, and during the drive the values slowly picked up. This indicates some form of trim learning has been done but I've no idea whether if it's completed.

Top row are port injectors, and bottom rows are DI injectors.

Hmm thats interesting.


The ecu can work out misfire by measuring the acceleration of the crankshaft after each cylinder fires, no acceleration it assumes misfire.


Im wondering how it would work out the learning for individual cylinder port and direct injectors since it only has one 02 sensor measuring comosite of all cylinders on a stock header but on many aftermarket its in one cylinder runner.