1g maf sensor

[droppinbottom]

I have been searching and trying to find my own answer but to no avail. I am trying to learn about maxing out the stock 1g maf sensor. How would I be able to tell if I am maxing it out?

Thanks

DB

 

[beatshack]

If you're logging your maf hz, you'll know you've maxed out its airflow capacity when you start to see your hz reading jump around.

 

[droppinbottom]

Mine doesn't start to jump around, it reaches 1600 hz and seems to just flatten out.

 

[dedlewamp]

Mine doesn't start to jump around, it reaches 1600 hz and seems to just flatten out.

1600 hz is simply the maximum your logger can go up to.

Edit, until I can find the source where I got that information.

 

[droppinbottom]

So basically the logger is not very helpful in determining if you are maxing out the maf. I guess my next question would be how much boost does it take no max out the sensor?

 

[dsm-onster]

1600 hz is simply the maximum your logger can go up to, actual fuel cut will happen when the car see's more than 2.55 grams of air per revolution.

I'm curios about where you got that number from...

 

[dedlewamp]

I'm curios about where you got that number from...

Edited my post to reflect I was unable to find exactly where I got that number. But, if you want to see how much airflow you a getting, and you have a SAFC, you can look at the value there.

As for now, fuel cut happens when you overrun your MAF. Also, it's not really dependant on boost, but the volume of air. But, generally you can say with more boost, there will be more air.

 

[dsm-onster]

Edited my post to reflect I was unable to find exactly where I got that number. But, if you want to see how much airflow you a getting, and you have a SAFC, you can look at the value there.

As for now, fuel cut happens when you overrun your MAF. Also, it's not really dependant on boost, but the volume of air. But, generally you can say with more boost, there will be more air.

Well I've had my old 1G maf drop hertz counts (overrun) and I wasn't hitting fuel cut... My maf was hacked... You can push back the fuel cut event, by fooing the ecu into seeing a lower airflow tan there really is, i.e. SAFC, MAFt, or other piggy back. This however does not affect the accuracy of the maf at higher volume airflows. The airflow can still be inacurately read by the maf if your running above 300 hp or so, even though you have an SAFC telling the ecu there's only 250 hp worth of airflow being ingested (running 550s).

But you are correct to say that fuel cut is airflow dependant. When an airflow reading is detected where the ecu calculates the necesisty for over 100% injector duty cycle, then soon thereafter, the ecu will cut all the injectors off.

BTW, the SAFC airflow number has not been known to be trustworthy.

 

[dedlewamp]

BTW, the SAFC airflow number has not been known to be trustworthy.

How exactly are you supposed to check your maximum airflow then? Do you need something like DSMLink? Because the logger stops at around 1600 hz, and the SAFC is unreliable, where do all these people get their airflow numbers from?

Thanks!

 

[dsm-onster]

How exactly are you supposed to check your maximum airflow then? Do you need something like DSMLink? Because the logger stops at around 1600 hz, and the SAFC is unreliable, where do all these people get their airflow numbers from?

Thanks!

Yes DSMLink... That's about it. or AEM EMS perhaps. Maybey MegaSquirt. If you can find a logger that logs higher hertz numbers, you know the IAT and baro, they you can calculate the airflow too.