sjsingle1

iTrader: (1)

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?

Fast355

They are not slightly different. They are very different.

SAPPER

iTrader: (10)

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)

sjsingle1

iTrader: (1)

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 ?

Fast355

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.

sjsingle1

iTrader: (1)

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

Fast355

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.

sjsingle1

iTrader: (1)

is a "truck" MAF better ?

kinglt-1

iTrader: (26)

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.

sjsingle1

iTrader: (1)

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 ?

RonSSNova

iTrader: (3)

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

Abs

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.