JapEatr

iTrader: (9)

Tuning the maf for a 3" intake seems to be a tedious task, any adjustments seem to swing one way versus the other

Anyone specifically tune for larger intake also have these same issues?

Also what histograms did you use. I set up one MAF Freq vs LTFT+STFT and have been trying to get the trims in check but AFR seems way off

nhanson

iTrader: (1)

Why should it be much different than stock? Thought the stock tubing around the MAF was 3"

JapEatr

iTrader: (9)

The larger intake diameter at the maf slows the air down and it is harder to make adjustments

stonny9

I have a 3" intake for 2 years with ls4 tb. Local came over and changed the parameters in my driveway for the intake only as the ls4 was already changed and has run fine since then.

Pm me your email and I can send you some of my tune files from a couple years ago.

Tune file will be on 42's, 2.8, ls4, 3" intake, header, catless 3" dp, and stock catback.

JapEatr

iTrader: (9)

im having issues correcting MAF swings for Hockeyman's Ported Head/Stage 2 Cams/3" intake/Longtubes/M62 2.8/80#s/E85

STFTs wing from +5 to -7%

its not bad, and i think his long tube header with cracked flexpipe may be giving erraneous AFR readings at his WB

Staged07SS

iTrader: (25)

It is... but any variation from stock can alter the MAF calibration. I believe the ZZP 3" intake is completely straight from the filter to just before it makes the bend into the engine compartment.

The stock intake is angled before the MAF sensor. Changes in intake velocity can occur because of this.

stonny9

Oh ok. My header has had a crack for a few years but never effected anything besides the sound that only a car person can tell. Must be the leak cause I wasnt even charged to adjust for the intake which took all of 5 mins.

Staged07SS

iTrader: (25)

The broken flex pipe can def be altering the trims.

Weld in a new flex, and retune. U should be set.

Area47

if you're talking about hockey's car. good luck. you see what i had to do with it years ago to do what i wanted it to.

JapEatr

iTrader: (9)

no kidding dude, this thing doesnt like me, i got it super close

and forget smoothing the curve, it will flip wombats

are all 3" intakes this finicky?

Hockeyman

iTrader: (4)

GUYS GUYS....

i'm here now.

wideband o2 and all other o2 sensors are located before the flexpipe. Shouldn't alter the trims.

JapEatr

iTrader: (9)

shhh... here comes the wombat!

Hockeyman

iTrader: (4)

someone bring me a beer

JapEatr

iTrader: (9)

venezuelean brake cleaner mine

Hockeyman

iTrader: (4)

Glad we are shareholders

creepySS

iTrader: (2)

Jap is easier to tune that 3in intake with a AFR error % histograms.
The changes you make with this are very minor and to the right direction.

574

iTrader: (5)

If its so hard to tune for how can a lot of people just put them on without tunes? because I know they do just like exhaust systems

JapEatr

iTrader: (9)

creepy, i usually do however the WB Hockey has doesnt have an output that i know of?

Blake did you get the user manual for that thingy

Hockeyman

iTrader: (4)

yep.
http://forum.aempower.com/forum/inde....0;attach=4370

creepySS

iTrader: (2)

Just make sure that you turn off the trims and DFCO.

creepySS

iTrader: (2)

Ohh, I see. The WB setup that i use , is the LC-1 but the electrical conection is a 12v lighter plug so I can use it in different cars.

creepySS

iTrader: (2)

BTW i bought that muffler holder for the WB sensor.

creepySS

iTrader: (2)

With trims is a hassle i tried that and i could not keep em steady.

JapEatr

iTrader: (9)

i have the LC-1 in mine with a PID to run it thru the AC Pressure switch.

creepySS

iTrader: (2)

Ok, i have the pro with aux inputs.
I think you have to hook up to his WB to smooth out that MAF.
Is so much easier has you already know.