catman78

iTrader: (15)

Hi guys,

I'm running V7 ROM 96530706.

I noticed current scaling is different then what's in the base file
96530706-TephraMod.bin

I have a Perrin intake and thought this intake would not require any MAF scaling adjustments.
1st time I looked at since I began learning how to tune my car.

Can anyone shed light as to why this may have been changed?
Should I put it back to stock or leave it?

96530706-TephraMod.bin is on left, mine right

merlin.oz

You might be better-off changing the scaling in that table to "uint8".
That eliminates any scaling definition variations that may have crept into the scene over the years. The table is actually a sort of pulse constant correction, not g/s airflow, hence the uint8 notion as a universal scale. Probably help get back to a known correct table value set too.

Dynotech Tuning

iTrader: (12)

Once you put it back to uint8 and copy over your settings, if oh put it back to the "MAF Adder" scaling, it will make it so it's a litlle easier to make MAF adjustments. With the MAF adder scaling, a 10% change in the scaling will be close to a 10% change in fuel trims.

catman78

iTrader: (15)

When I use unit8, the left side scaling looks all screws up.

like:

0
192
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
9
0
10

Dynotech Tuning

iTrader: (12)

We meant for the right side.

catman78

iTrader: (15)

I'm a bit confused. Set Y axis to unit8 rather then MAF(Adder)?

Also,

I logged a run with stock #'s for MAF and AFR's from UEGO were quite a bit leaner.
13 vs 11.5

I'm assuming prior owner removed honeycomb from MAF, because I never saw one in there. Just the little U shaped sensor element is present.
Maybe this is why my #'s were set a bit higher then stock?

My AFR map and AEM log are pretty close with modified MAF scaling values.
If that's the case, can I assume MAF is scaled correctly?

chetrickerman

iTrader: (7)

They are both on the Y axis. I'm assuming what dynotech tuning is saying is open the map, click edit, click edit map definition. Then in the MAF scaling part look for the scaling pull down menu, and click uint8

Dynotech Tuning

iTrader: (12)

It basically looks like your current maf has been scaled from stock. Might be best to start over with the stock v7 scaling and retune. Or you can simply transfer over all of your current settings to the new V7 rom and start from there, its up to you.

-Jamie

06EvoIXmr07

iTrader: (22)

Stupid off topic question,does anybody know if the v7 sd maf scaling that comes with rom are stock scaling or is it modded??

Dynotech Tuning

iTrader: (12)

Definitely not a stupid question, it's stock settings. The 'scaling' formula's may vary from other roms but the base coding is bone stock.

-Jamie