elias_799

iTrader: (8)

i am switching to a twin turbo set up and i would like to leave a maf system in place and not go SD just yet

but somebody told me that the factory MAF is limited to about 550rwhp and i plan on going well beyond that

so, what kind of maf sensor should i run ? i got an slp maf that a friend gave me, should i give that a try ?

sixpack_2_go

iTrader: (1)

just wondering this same thing myself! good thread!

elias_799

iTrader: (8)

come on guys 40 views and nothing ? i know not all of you are running SD on your 600hp cars

SincalT/A

iTrader: (16)

Stock ecm is the limit not the maf.The issue can be tuned around but you'd better know what your doing.

Jimmy P

iTrader: (177)

The factory maf is limited by the amount of air it can read, not necessarily the HP rating. There are ways around it with good tuning..Or you can can do speed density but you mentioned you want to avoid that for the moment.

SincalT/A

iTrader: (16)

Correct me if im wrong but,it is the ecm that has a limit of 512g/sec.
The maf still reads after that cause my hz.(which is how the maf signals the ecm) still rises after the ecm stops calculating airflow.

elias_799

iTrader: (8)

the reason why i wanted to avoid speed density is because i have been told that a maf system will be better for me because i drive my car allot on the street

can somebody explain speed density tuning too me and if it is a good idea to run on a dd 600hp car ?

blue00ZZleeper

iTrader: (5)

You can "overfuel" it above where the MAF cutsout so it still runs well and doesnt lean out. You'll peg the MAF but it'll still run. I peged mine on about 9psi. A well tuned SD car will actually run better then a MAF car most of the time.

elias_799

iTrader: (8)

what would i need to switch to an SD tune ?

blue00ZZleeper

iTrader: (5)

A different MAP sensor. Some guys are running the cobat sensor. I dont have any pn#'s here but I'm sure you can look it up. I believe it also costs 2 extra credits on HP tuners to change the tune from MAF to SD. What boost levels are you looking at? Anything over 14-15psi should run off a 3BAR.

mike13

iTrader: (27)

I don't think you would have a problem with SD, especially a closed loop SD tune. It would still have the ability to adjust your afr's.

ls1290

iTrader: (20)

The best place to install a SLP MAF is in the trash. Go with a LS3 style MAF and you will be very happy.

RooRnZ28

iTrader: (14)

I agree. My tuner told me the SLP MAF is junk and to just stick with the stock one.

AFASTYZFR1

iTrader: (55)

It can never be right if you tune around it......when the weather changes so will the tune......only way to tune a car that will max out the maf is by switching to speed density

SincalT/A

iTrader: (16)

What is right really?
If the afr is acceptable then imo. its right....
There are more then a handful of people using this style tune.One of which happens to be a certain 4x4 running mid 9's.Actually there is thread that has been recently posted in here about it.Yes,he is 1bar maf tuned.Is it perfect no but,neither is sd....
I do think if you know what your doing and have the right tools availible to monitor/tune the vehicle.Then it would be a viable option.


D.

AFASTYZFR1

iTrader: (55)

The AFR will be right that day.....but when winter or summer comes around and the temperature changes so will the AFR.....hack tuning around a maxed maf is not the best way to do it

SincalT/A

iTrader: (16)

Your probably right but, i was jus letting him know there is an option to keep using the maf maxed out.

elias_799

iTrader: (8)

what power level will i be able to take the ls3 MAF to ?

speedcrazy2

iTrader: (1)

it will still be held back by the computer not the maf

AFASTYZFR1

iTrader: (55)

Stock computer will run 800-1000 rwhp in speed density no problem

I'm not sure what the actual limit of the stock computer is but my car has 0 issues.