hey can someone please help me
I have a 89 gta 5.7 w/ headers
air foil ,msd6a,fuel pressure reg,
aftermarket chip. my car runs much better
with my aftermarket chip than my stock
chip (apyu3516). installing procharger
9 psi around june. i just installed a zif
on my memcal and put a at29c256 on
it. I am doing lots of reading before i start modding so i am looking at my
aftermarket chip that runs so well.
the things altered in the am chip are
fan1 temp maf scalers 1-5,maf tables,
pe-rpm table,pe-temp table.



Now my question
while trying to understand the inner working of the maf tables I read some posts about scalers. so i used tunerpro
to print out a text file of my bin and found my scalers have been changed.
I now understand some of the math
involved--by using the bua hac.

I found scaler 1 dropped from 24 to 22
2 stayed at 48
3 raised from 81 to 83
4 raised from 131 to 134
5 raised from 204 to 205

I think i know what is being accomplished for each scaler and kind of makes sense but here is the strange part the maf tables 1 -5 are
changed in the opposite direction.
here is the breakdown.
maf table1 raised slightly
maf table 2 lowered
maf table 3 lowered
maf table 4 lowered
maf table 5 lowered


summary-it seems to me the scaler
is a multiplier and can change the
entire maf table it is used on to
either rich or lean.
an example of what i noticed
my table 1 at 1.46v has 22.36 gr/sec
maf lookup x scaler/256=gr/sec
248 x 22 /256= 21.31 gr/sec
so my am chip calculates 1.05 gr/sec
less than stock at 1.46v
but the table at 1.46v has been changed from 22.09 gr/sec stock
to 22.36 gr/sec am chip

so my understanding as of now is
my maf reading at 1.46v was dropped
1.05 gr/sec then raised .27 gr/sec


does this mean I have a net decrease of .78 gr/sec at 1.46v
1.05 gr/sec
- .27gr/sec
_________
.78 gr /sec

If i am correct why not just lower .78
in the table.

I realize I may be way off and i am sorry if this is hard to understand.
thanks in advance

 

Yes, that's the math involved with the MAF tables/scalers.
It, also works closely with the injector constant for actually doing the fuel calculation. So you can use this as one way to account for the differences in linear between two different injectors.

 

You should get a ECM that handles boost like a 749 or somthing. Just my .02 cents
Ed
I think you'd be better off in thefuture