maf calibrating

[vr4gasm]

who can i send my maf off to and have it recalibrated?

[slow6]

Re: maf calibrating

haha wish it was like that, good luck finding someone
i would've sent mine off if someone would do it
if someone ported their maf and wanted to get the car's computer reprogrammed for it, it could be dangerously lean
The maf is just a sensor... so the calibration is stored in the car's computer.

[vr4gasm]

Re: maf calibrating

so are you saying don't port the tb or don't calibrate the maf? what would happen if i ported the tb and left the maf how it is the reason i asked this is zzp offers maf calibration on the stage 2 tb and i emailed them and they won't calibrate the maf for me

[slow6]

Re: maf calibrating

so are you saying don't port the tb or don't calibrate the maf? what would happen if i ported the tb and left the maf how it is the reason i asked this is zzp offers maf calibration on the stage 2 tb and i emailed them and they won't calibrate the maf for me

if you port the tb/maf and dont recalibrate the maf you will run lean AFRs and eventually probably do major engine damage like i did
I wouldnt wanna tune someone else's ported TB on my engine and risk damageing my engine either. dont blame them
GOOD LUCK!

[vr4gasm]

Re: maf calibrating

so your saying i need top recalibrate it how do i go about doing this?

[97rs4life]

Re: maf calibrating

if you ported your tb, which you don't need cuz our's are huge unless you are forcing some big air through their with a blower or turbo, you need hp tuners to program your MAF tables to calibrate the tune for the bigger tb.

[slow6]

Re: maf calibrating

and you will probably also need a wideband sensor
I wonder if any mail-order place will do a tune for a ported tb
i highly doubt it, it would not be accurate AT ALL

[iGoRa]

Re: maf calibrating

#1. you do not need to have your TB ported even if you are running HUGE turbo. This is ricers issue with their 1,5in TBs.
#2. you do not calibrate the sensor , you do calibrate your computer to work with the sensor
#3. noone would be able to calibrate it for you by mail.you woud have to mail your car to someone to do that job. It has to be calibrated on your engine with wideband+tuning softwate.

I hope its clear.

[vr4gasm]

Re: maf calibrating

why does zzp say that when you get the stage 2 throttle body you get the MAF calibrated for more air flow??

[slow6]

Re: maf calibrating

ask them
sounds like a marketing ploy

[97rs4life]

Re: maf calibrating

why does zzp say that when you get the stage 2 throttle body you get the MAF calibrated for more air flow??

read it again and read the fine print bullet points, they send a mini-afc unit that you have to plug in to adjust the needed parameters in your computer.

[grayman]

Re: maf calibrating

ok, sorta moving thread to different direction....
(i have read up on calibrating maf and have even done it with hptuners, wideband, etc.)
Once the tables have been corrected through testing with the maf disconected math can be used to then calibrate the maf table. however, our 3800 rwd pcm is not the same as the ls1 pcm. some things are missing to put is short. If different 'cells' are to have different multiples then a spike is scene in the 2d graph of the maf calibration. also, our cars (atleast the newer series 2 l36 cars) are programed to run lean from the factory. this saves fuel...regardless of the fact that AFR target is 14.7. I have found that my maf calibration has richened up the fuel mixture and gas mileage has suffered. I have since calibrated the maf back 'down' and leaned it out some. (don't worry, i know the difference between cruise and WOT)
Anyway, since few people here (if any...) (as knowlegeable as they are) or at ls1.com are actual GM engineers a lot of even the well written perspectives on tuning, etc.. may not be the end all, be all, correct information.
Something I don't understand and perhaps someone can help..... If the maf or TB 'has not been ported' and is still the same exact factory tolerances...why would a maf need to be calibrated? The maf calculates airflow, correct? Any modificactions such as CAI or smooth bellows or turbo or SC that allows more air to pass into the engine over a set period of time will still be 'calcuated' by the maf. If the actuall intake port and shape of the TB and MAF have not been ported but are still 'stock' then wouldn't the maf still be calibrated for those diameters?
If someone wanted to richen up the AFR then they could use an intermediate device such as a maf translator (or tuning software) to do so....but not because the maf needs it to calculate airflow correctly but rather in order for the AFR to be adjusted to what someone thinks would be a better AFR based on their mods and performance goals vs. fuel economy.
In other words...if you install a larger lift cam then the valves stay open longer/further and allow more A/F mixture to enter the cylinder. Unless the TB or maf have been ported then the maf will still calculate the airflow and add that much fuel through the injectors. Just becuase the cam lift is higher doesn't mean the AFR will go lean...does it?
If the project is forced iduction and the blower is pushing more air than the maf can read then that is a different story. I am not tying to open that can of worms right now. I am just still confused as regards the maf as an airflow sensor. It seems as long as the actuall sensor configuration is of stock diameter (stock maf) then it will correctly read airflow because it has been calibrated by the factory in relation to it's own airflow charateristics...mainly based on its inner diameter and shape.

been dwelling on this for a while.

Has anyone hooked up a wideband 'before' they started modding their car and been able to compare the readings before (stock) and after modifications to the airbox, CAI, turbo, cam, etc.?

[Turbo V6 Camaro]

Re: maf calibrating

:naughty: :naughty: i know where to can get the maf calibrated to support more air flow then the stock PCM :eek: :naughty:

[grayman]

Re: maf calibrating

:naughty: :naughty: i know where to can get the maf calibrated to support more air flow then the stock PCM :eek: :naughty:

??????

did I miss something important? Do you mean there is a way increase the potential of our MAF system and overcome the limitations of its airflow maximums?

[slow6]

Re: maf calibrating

Fast?