MAF Calibration
Nov 12, 2006, 07:11 PM
#16
Originally Posted by DB Performance
The Subarus use a 0-5v MAF and the table in the ECU covers the entire range with a large amount of data points, so it is helpful for dialing in an intake on those cars.
The MAF table in the Evo maxes out well before the MAF does though. It is helpful for dialing in your part throttle fuel trims though, especially around idle, if you have large injectors or if you have a weird airfuel spike during boost transition that you can't hit with the normal maps.
The scaling of the data and axis for the MAF tables in Ecuflash is wrong, but it is easy to figure out what they should be and change them in the definition.
The MAF table in the Evo maxes out well before the MAF does though. It is helpful for dialing in your part throttle fuel trims though, especially around idle, if you have large injectors or if you have a weird airfuel spike during boost transition that you can't hit with the normal maps.
The scaling of the data and axis for the MAF tables in Ecuflash is wrong, but it is easy to figure out what they should be and change them in the definition.
You are right though.. When I applied the correct scaling to it, it seems to translate to 2609hz which is about the max a stock MAF reads correctly.. I noticed the error a few weeks back, but never made the connection about the reading..
The good news is you can alter this axis if necessary.. I definitely would like to get some confirmation on whether or not this is indeed correct, which is why I never posted much about it a few weeks ago.
Last edited by MalibuJack; Nov 12, 2006 at 08:00 PM.
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