Thread: Modified MAF

I am purchasing a modified "unlimited" stock MAF and throttle body. Does anyone have any experience with these? Do I need a different MAF table to run this?

What? Explain.

^^^ X 2

I'm thinking Scott is aiming turrrrbo soon.

indeed mr Bill....already there actually

The modified MAF removes the ceiling of 11500 hertz so you can techincally flow as much air as you want through it...

Most people use a min-AFC to scale the output signal of the MAF.

yes, but how is this achieved? and where'd you get it from?

Bio

I'm confused once again.

apparently he has a MAF that is modified so it has no 11.5kHz ceiling, which means he can have it flow to whatever he wants and be able to have the PCM understand the amount of air that is being ingested.

i want to know how he did it.

You can flow as much as you want through the stock maf, but all its calculations stop at 11,500.

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Originally Posted by BillBoost37

I'm thinking Scott is aiming turrrrbo soon.

Originally Posted by scottgs03

indeed mr Bill....already there actually

The modified MAF removes the ceiling of 11500 hertz so you can techincally flow as much air as you want through it...

...

Originally Posted by darkhorizon

You can build a stock maf that greatly reduces the amount of air it reads, which in turn makes it very hard to reach that 11.5k hrz range. Its not "unlimited" but I can say I have never seen much more than 10.5k on any of the modded mafs I have built on 20+psi.

Trade accuracy and data points for increased limits?

Originally Posted by darkhorizon

Not at all. I just get to use the table under 3k hrz as I would use the atuff higher than 11.5k.

The stock MAF is from 1500 to 11500Hz with calibration every 125Hz. If you are not modifying the sensing capability, but are simulating a higher ceiling, then you're increasing g/sec spacing.

What does the LQ4 or other GM mafs max at? I guess this should be answered in lb/min or g/s compared to the stock one.