'15 - '16 Mustang C+L Racer MAF Curve

[96gt4.6]

Working on installing a C+L cold air intake on a '15 GT. It's the racer version, which says it needs a tune. I'm assuming the MAF transfer function needs to be altered as it appears the MAF tube is larger.

Anyone have any tips on the proper way to scale this? I mean I could do it via LTFT's, but i'm almost thinking there was a multiplication factor you could use based on the housing size change.

Any help appreciated as I learn!

Thanks!

[AKDMB]

Here is a way to calculate a base correction, just multiply the MAF Curve by the percent increase in area of the MAF Housing.

http://www.hptuners.com/forum/showth...F-tuning/page7

[Witt]

I usually take a peek at fuel trims around idle areas at operating temp then multiply the entire maf transfer by that amount to get started. Fine tune using fuel trims afterward.

[96gt4.6]

Here is a way to calculate a base correction, just multiply the MAF Curve by the percent increase in area of the MAF Housing.

http://www.hptuners.com/forum/showth...F-tuning/page7

Thank you sir! This procedure worked great!!! Trims were within 3% through the entire RPM sweep after using those formulas. Much appreciated!

[Jn2]

Thank you sir! This procedure worked great!!! Trims were within 3% through the entire RPM sweep after using those formulas. Much appreciated!

log MAF period vs LTFT+STFT from the "math" section and you should be able to get them down a bit more, but 3% is fine