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Title: ME7.2 Bosch MAF Scaling (Stock MAF in Bigger Pipe ID). Post by: Fabioo on April 19, 2024, 09:16:05 AM Hello, i did fit Stock MAF into 100 mm ID Pipe and would like to Proper* scale it (Because scaled on Factor or Surface Scalars doesnt work well).
Found out so far that best scaling method is by using 4-6th Polynomial Equation. Made excel sheet with Stock MAF kg/h's and Voltages from the binary then made a graph of it and excel came up with a 5th Polynomial Equation. Also used LINEST function to find a values of the 5th Polynomial Equation so i can use them. But now i am stuck how to apply any changes by diameter of the pipe to the equation. Any help appreciated. Thanks Title: Re: ME7.2 Bosch MAF Scaling (Stock MAF in Bigger Pipe ID). Post by: Fabioo on April 26, 2024, 03:48:43 AM Anyone good at excell ? or i am blind and did mistake somewhere
kg/h's should be the same, polynomial equation is calculated by excel itself based on the MAF Curve but when i re-apply the equation i got different output ... Title: Re: ME7.2 Bosch MAF Scaling (Stock MAF in Bigger Pipe ID). Post by: Fabioo on May 02, 2024, 09:32:43 AM Ok i've had problem with system separators i guess, after set it up properly to decimal dot instead sheet works now.
Uploading updated sheet and Polynomial Equation seems to work but still i don't know if it is proper scaled if anyone could take a look. Red KG/h is rescaled by Polynomial Equation based on Stock MAF. Yellow is adjusted by hand so i could drive the car. Blue marked cells 230kg/h seems to be my Stable Idle point that i hold on to. Gonna test Red scaling in car, any help would be appreciated thanks. Title: Re: ME7.2 Bosch MAF Scaling (Stock MAF in Bigger Pipe ID). Post by: zachn1998 on July 08, 2024, 08:33:21 PM How did this go?
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