Ported MAF
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
The sensor is a flow measurement element and in the normal process industry it normally needs X upstream and X downstream lengths of straight run before the measuring element. In a automotive application sometimes you can't get those demensions. So that is why GM designed the sensor with straightening vanes to give the sensor a more accurate reading of the air flow. Typically in a process application a flow sensor needs at least 5 pipe diameters of upstream lenght or for example a 6" pipe would be 18" upstream from the sensor and 2x diamters or 12" downstream.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Indeed, unless your engine demands close to 750cfm of air flow you will not likely see any benefit from descreening & gutting the MAF. And the stock TB will not flow to that level anyway.
The fins were put in there as heat sinks due to some testing done in Death Valley.
I've installed a 52mm TB and gutted the MAF, so my engine is now ready for the "buildup". That said I did NOT see any change in trap speed from the mod.
The fins were put in there as heat sinks due to some testing done in Death Valley.
I've installed a 52mm TB and gutted the MAF, so my engine is now ready for the "buildup". That said I did NOT see any change in trap speed from the mod.
Team Owner
Joined: Sep 2001
Posts: 62,126
Likes: 1,727
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Dont mess with the heat sink fins, its too risky. You could end up buying a new sensor if you mess with them and screw it up.
Drifting
Joined: Oct 2006
Posts: 1,694
Likes: 0
From: Beaverton Oregon
