Modified MAF's
Drifting
Joined: May 2002
Posts: 1,509
Likes: 3
From: Hazel Park MI
Re: Modified MAF's (87vette)
I don't know about the gains, but I know the heat sink fins inside the MAF can be used as a programming device for chip calibration. You may have to keep the heat fins intact for some chips, rather than gut it or buy one without the fins. The chip calibrations may not take. :seeya
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Modified MAF's (87vette)
Why dont you just take the screens off your own and dont worry about the heat sink fins inside.
Melting Slicks
Joined: Feb 2003
Posts: 2,770
Likes: 0
From: Construction Sucks! MI
Cruise-In V Veteran
St. Jude Contributor '03 & '05
Re: Modified MAF's (vader86)
Why dont you just take the screens off your own and dont worry about the heat sink fins inside.
Thread Starter
Safety Car
Joined: Aug 1999
Posts: 4,931
Likes: 3
From: Fort Lauderdale FL
Re: Modified MAF's (vader86)
What I don't understand is how is it that the screens help ? If I take it off its not gonna make much of a difference anyways because air still goes through it anyhow.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Modified MAF's (87vette)
The screens are a restriction to the air flowing freely, they are meant to straighten the flow for the sensor element.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: Modified MAF's (87vette)
A MAF will flow quite a bit more with out the screens & heat sink (over 150cfm) but I over the years as I have been learning about the custom PROM burning. One thing that is stressed about custom prom is that removing the screens modifies the MAF calibration and makes it much harder to get a good tune from the calibration. For what it is worth, I removed my screens/heatsink and gained a .1 and 1 mph.
Melting Slicks
Joined: Jan 2003
Posts: 2,167
Likes: 0
From: What did the 5 fingers say to the face? SLAP!!
Re: Modified MAF's (vader86)
The screens are a restriction to the air flowing freely, they are meant to straighten the flow for the sensor element.
Race Director
Joined: Feb 2003
Posts: 11,133
Likes: 1
From: ~The DARKSIDE Group~
Re: Modified MAF's (87vette)
I removed the MAF screens, replaced aluminimum body with fiber glass to reduce heating air to engine, and put air foil in MF to protect sensor..
no noticible chane in performance. :bb
no noticible chane in performance. :bb
Le Mans Master
Joined: Jul 2001
Posts: 8,183
Likes: 3
From: Santa Maria, CA
Re: Modified MAF's (flyersfan1088)
I was reading that the cooling fins were added only because there were MAF sensor faliures(Bosche) during heat testing in the desert by GM. Same MAF(Bosch)on other cars made by other manufacturers have no cooling fins. CFM potential here. Be very careful removing them!
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: Modified MAF's (flyersfan1088)
Don't the screens actually create turbulence? Removing them smoothes airflow
Melting Slicks
Joined: Jan 2003
Posts: 2,167
Likes: 0
From: What did the 5 fingers say to the face? SLAP!!
Re: Modified MAF's (dgoodhue)
I know it's calibrated for the screens, but the screens were not added for performance. Just to keep crap away from the wire.
Le Mans Master
Joined: Aug 2002
Posts: 7,441
Likes: 421
From: Ventura County, CA
St. Jude Donor '05 thru '24
Well regardless of all the CFM numbers IF you do this mod to your stock Bosch MAF be careful not to damage it like I did, I found mine to be a bit sensitive. I went and bought a Microtech MAF that is supposed to flow more air. I got it from the MAD catalog and havent had any problems.... :auto:
