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11-12-2019, 11:20 AM | #1 |
Scooby Newbie
Member#: 493621
Join Date: Nov 2018
Chapter/Region:
AKIC
Location: Lithuania
Vehicle:2007 Impreza WRX wag white |
MAF scaling on WRX 2.5
Hey guys. I have some question regarding MAF scaling, in logger I noticed that ecu reads MAF voltage up to 4.8v, but table in ROM ends at 4.69v and ECU reads air only to 4.69v. What should I do? Rescale MAF in open loop? Or is there some kind of way to transfer MAF scaling table from STI to WRX, as I saw STI MAF scaling goes up to 4.96v.
Car and specs: Impreza WRX Wagon, EJ255 with VF35 turbo, Mishimoto performance intake and front mount i/c
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11-12-2019, 12:57 PM | #2 |
Scooby Specialist
Member#: 182415
Join Date: Jun 2008
Chapter/Region:
Tri-State
Location: New York
Vehicle:1999 RS Aspen White |
You can rescale your voltage values, the ECU does linear interpolation so it will continue to use the last cell's values based on the scaling you enter. You may lose resolution at a lower voltage/flow range but will have better value control at the higher numbers.
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11-12-2019, 02:52 PM | #3 | |
Scooby Newbie
Member#: 493621
Join Date: Nov 2018
Chapter/Region:
AKIC
Location: Lithuania
Vehicle:2007 Impreza WRX wag white |
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11-13-2019, 11:29 AM | #4 | |
Scooby Specialist
Member#: 385256
Join Date: Mar 2014
Chapter/Region:
NESIC
Vehicle:'18 Giulia QV '21 Giulia Q4 |
Quote:
if you are not reaching or exceeding the upper limits for MAFV with your set up then expanding the table is likely not necessary at this time. Always make sure to use a wideband O2 sensor to calculate fueling error as the means for evaluating the need to change the maf scaling. |
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11-13-2019, 01:34 PM | #5 | |
Scooby Newbie
Member#: 493621
Join Date: Nov 2018
Chapter/Region:
AKIC
Location: Lithuania
Vehicle:2007 Impreza WRX wag white |
Quote:
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11-14-2019, 07:42 AM | #6 | |
Scooby Newbie
Member#: 493621
Join Date: Nov 2018
Chapter/Region:
AKIC
Location: Lithuania
Vehicle:2007 Impreza WRX wag white |
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