New MAF...need tune?

Reply Subscribe

Thread Tools

Search this Thread

Mar 11, 2023 | 03:36 PM

sjsingle1

Thread Starter

TECH Senior Member

iTrader: (1)

Joined: Feb 2010

Posts: 6,755

Likes: 292

From: Fort Worth TX

New MAF...need tune?

I am switching from the stock metal ( alum ) MAF to the plastic truck ( ? ) ( delphi ) MAF ....did I read somewhere that the plastic MAF needs a slightly diff tune?

Mar 11, 2023 | 06:23 PM

Fast355

TECH Resident

Joined: Oct 2006

Posts: 993

Likes: 173

From: Euless, TX

Quote:

Originally Posted by sjsingle1

I am switching from the stock metal ( alum ) MAF to the plastic truck ( ? ) ( delphi ) MAF ....did I read somewhere that the plastic MAF needs a slightly diff tune?

They are not slightly different. They are very different.

Mar 11, 2023 | 09:55 PM

SAPPER

TECH Fanatic

iTrader: (10)

Joined: May 2004

Posts: 1,593

Likes: 267

From: Halfway back on the Highway to Hell...again!

Tes you will need a tune. MAF works of frequencies and if not dialed in, it will run like crap or go into Limp mode (speed density)

Mar 11, 2023 | 11:09 PM

sjsingle1

Thread Starter

TECH Senior Member

iTrader: (1)

Joined: Feb 2010

Posts: 6,755

Likes: 292

From: Fort Worth TX

the MAF is a delphi AF10056....which I thought was a direct replacement for the old alum style MAF ....now i know and will get ahold of my tuner

does anyone have a tune file for this ?

Mar 11, 2023 | 11:37 PM

Fast355

TECH Resident

Joined: Oct 2006

Posts: 993

Likes: 173

From: Euless, TX

Quote:

Originally Posted by sjsingle1

the MAF is a delphi AF10056....which I thought was a direct replacement for the old alum style MAF ....now i know and will get ahold of my tuner

does anyone have a tune file for this ?

If it was designed as a stock replacement, it should work right out of the box. When you said truck MAF, I was thinking of the Gen III truck MAF from the GMT800 4.8, 5.3, 5.7, 6.0 or 8.1L truck engines.

Mar 12, 2023 | 04:34 AM

sjsingle1

Thread Starter

TECH Senior Member

iTrader: (1)

Joined: Feb 2010

Posts: 6,755

Likes: 292

From: Fort Worth TX

not sure when GM got rid of the alum MAFs and started using the plastic one.....thought is was called the truck MAF cuz the trucks started using it first

Mar 12, 2023 | 02:29 PM

Fast355

TECH Resident

Joined: Oct 2006

Posts: 993

Likes: 173

From: Euless, TX

Quote:

Originally Posted by sjsingle1

not sure when GM got rid of the alum MAFs and started using the plastic one.....thought is was called the truck MAF cuz the trucks started using it first

The unit you linked to is not a "LS truck" MAF though. It was designed to be a replacement for the LT1/L31/early LS1 MAFs. The truck mafs are like 85mm and have an entirely different flow curve.

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Mar 14, 2023 | 08:28 AM

kinglt-1

TECH Senior Member

iTrader: (26)

Joined: Jul 2005

Posts: 5,897

Likes: 254

From: Ft. Wayne, IN

Quote:

Originally Posted by sjsingle1

is a "truck" MAF better ?

It's an upgrade if you run a larger intake and/or need more resolution due to maxing out the stock 78mm frequency range. Larger MAF will require rescaling the air flow curve in the tune.

Mar 14, 2023 | 01:44 PM

#10

sjsingle1

Thread Starter

TECH Senior Member

iTrader: (1)

Joined: Feb 2010

Posts: 6,755

Likes: 292

From: Fort Worth TX

so the stock alum ..and its plastic replacement is 78mm....and the truck MAF 85mm ? does anyone have a p/n for the truck MAF ?

Mar 19, 2023 | 01:56 PM

#11

RonSSNova

8 Second Club

iTrader: (3)

Joined: Aug 2011

Posts: 4,729

Likes: 814

From: Portland, OR

This is the truck MAF. 85mm. Also used on C5 Corvette.
The missing number there is a 1.

Sep 28, 2023 | 09:07 PM

#12

Abs

TECH Regular

Joined: May 2023

Posts: 417

Likes: 138

From: Franconia, PA

Quote:

Originally Posted by sjsingle1

so the stock alum ..and its plastic replacement is 78mm....and the truck MAF 85mm ? does anyone have a p/n for the truck MAF ?

The stock aluminum is somewhere between 75 and 78mm. It has a lot of restriction from the thick ramps running down the middle.

The delphi af10056 is the new oem plastic replacement and it should run directly in place of the old one. It apparently should not need a tune. And that makes sense because it would be terrible if a stock replacement did. It wouldn't sell.

This new one has an 85mm ID (91mm OD) and is less restrictive by the looks of it. Same ID as the truck maf, which is the same maf as the c5, c6 ls2 and ls2 gto. The c5 z06 uses a descreened truck maf.