Is the new style Card MAF better/benificial that the old style?

[regorih]

I have a 99C5 with the stock MAF and I was wondering if anyone has changed their old style round MAF for the new card style you can find on the 2008 C6's? Is the new maf worth changing? Roger

[tblu92]

Short answer--leave it be !!! Screen and all !!!

Many people on 97 & 98's will will change to the bigger MAF--The reason being that a 97-98 ECM's MAF table only goes to 11250 HZ-On a 99 and newer however the table goes to 12000 HZ--
Only on a highly modded engine you will ever get close to 11250 let alone 12000 HZ ( more HZ mean more airflow) The problem when changing a 97-98 to the bigger MAf is that unless you change to a newer ECM--your HZ range will still stop at 11250 and if it goes above 11250 it will lock on the last entry and go static--
In your case your ECM HZ table already goes to 12000 even though you have the old style-Honestly there is very little power their to be gained---Your best scenario would be to change the ends-- BUT unless you have a programmer like HP or EFILIVE your fuel trims will go haywire and tuning is a MUST--It takes hours of data logging to re-scale a MAF after changing ends or going to the bigger size or removing the screen--
The MAF is stricly an air measuring device---A stock MAF is good for 500 HP--

What also happens is the fuel trims go way positive and the ECM keeps adding fuel to compensate for the different reading--You're not getting more air in---just a different reading than before at certain load levels--
BUT when going to WOT with a positive fuel trim-the ECM will ADD that % to your WOT fueling--makeing it pig rich and very lazy- It's not uncommon to see 15-20 % positive fuel trims when messing with the MAF--that's why tuning is a must and not an option--Adding 20% to your WOT fuel would be like pouring gas in with a bucket at WOT !!!!----

[Bill Curlee]

Very nice explaination!!

BC

[tblu92]

Originally Posted by Bill Curlee

Very nice explaination!!

BC

THKS Bill-----