Results 1 to 7 of 7
06-21-2009, 07:23 PM #1
Aftermarket Air Flow Sensors and Descreening
I frequently get questions regarding aftermarket MAF sensors/descreening and what gains they will net. My answer to that question 9 times out of 10 is: NONE as the OEM unit can handle ~550HP.
The aftermarket MAFs are not calibrated the same as the stock MAF. So, for a given volume of air, the aftermarket MAF will underreport that volume, this causes the PCM to increase ignition timing slightly, which is the resulting increase in power.
When tuning for an aftermarket MAF, the PCM will be recalibrated so that the MAF reports correctly (or close to correctly), thus leaving no real benefit to the aftermarket MAF. Descreening has the same effect as an aftermarket, and has no benefit other than underreporting the incoming air.Black Bear Performance- Custom Tuning Solutions
Authorized EFILive and MAGNACHARGER seller
06-21-2009, 07:33 PM #2Jim
2004 SILVERADO 2500HD LS
Pro Comp Leveling Kit
285-75-16 Cooper ST All Terrains
Pro Comp Programmer
Linux Bed Liner
1967 Landcruiser <350 Chevy>
1990 Geo Metro Convertible
2007 FJ Cruiser
06-21-2009, 07:34 PM #3
06-21-2009, 07:39 PM #4
06-22-2009, 06:47 PM #5
- Join Date
- Nov 2008
- Northern Colorado
I descreened mine on my 05 and really haven't noticed anything. It wasn't that dirty though to begin with. I have never thought to much of getting an aftermarket one.My first Chevy :great:
2005 Silverado 1500 ECSB Z71 5.3L:
3'' Aero Turbine exhaust with side dump
6000k HID's Highs, lows and fogs with H-4 mod
Rough Country Full Leveling Kit
285/70/17 Firestone Destination A/T's
Dick Cepek DC1
more to come..
06-22-2009, 09:16 PM #6
i have an aftermarket one not much of a difference my factory one went out and it was cheaper to get the aftermarket one kinda like those shorty headers that leaked all time i use to have you get what ya pay for xD
Last edited by grimreapersshadow; 06-22-2009 at 09:18 PM.
06-22-2009, 10:46 PM #7
Yeah I try to sway most folks into getting the long tubes, as the shorties are just as efficient as the stockers.
By mjalstad in forum Performance & FuelReplies: 7Last Post: 09-05-2011, 08:30 PM
By SilveradoGirl in forum General Chevy & GM Tech QuestionsReplies: 8Last Post: 12-28-2010, 04:06 AM
By CornhuskerChevy in forum Wheels & TiresReplies: 3Last Post: 08-17-2009, 10:37 PM
By gotchapunk in forum Performance & FuelReplies: 3Last Post: 06-11-2008, 05:49 PM
By b5davis in forum Performance & FuelReplies: 2Last Post: 04-29-2008, 06:19 PM