Stock LBZ MAF Size

[NickInMN]

What are you asking?

I should have been more clear. My understanding is airflow, determined by the MAF sensor, is used to calculate fueling. If the MAF reading at idle is 59 g/sec but the actual number is closer to 40 g/sec it seems like the ECM doesn't have the correct information. And if that's the case it seems like the engine should run poorly or at the very least smoke, which it does not since the computer thinks it is getting more air than it is and as a result provides more fuel.

[killerbee]

The fueling per maf schedule mostly becomes problematic for turbo spoolup, especially at high elevations. But that is when it is reading lower than normal, not higher. The LBZ at steady state will run on an air surplus, so you wont notice anything off. The induction system in general on the LBZ is ridiculously efficient. MAF reading becomes a problem more when it is low, it can cause the turbo to hang as the truck has a hard time increasing rpm.

[bobo]

Do some research on MAFless tuning. Your tuner most likely put in a good amount of effort to make an efficient tune without MAF metering. It can be done, but is a tedious process. Most “tuners” use the MAF to limit fueling. This is done on the factory calibration. I prefer MAFless tuning, but it’s not for everyone.

[NickInMN]

Do some research on MAFless tuning. Your tuner most likely put in a good amount of effort to make an efficient tune without MAF metering. It can be done, but is a tedious process. Most “tuners” use the MAF to limit fueling. This is done on the factory calibration. I prefer MAFless tuning, but it’s not for everyone.

I'll do some looking but that sounds like it is well above my pay grade!