I've been running an SD tune with the MAF still place for quite a while now....late yesterday evening I removed the MAF completely from the intake tract but still left it plugged in and sitting near the filter to keep the IAT sensor sort of half-assed working.

All I can say is WOW !!!

Using the pid in HPTuners for delivered torque (which I know is not accurate...but it's at least consistant in its inaccuracy so it can be used to detect changes) I was never able to get above 345 ft/lbs with the MAF in place....in a direct comparison on the same road yesterday evening 15 minutes apart I went from 341ft/lbs @ 4400rpm with the MAF installed to 374ft/lbs @ 4400rpm with the MAF removed (in both cases the IAT was reading 121º)...that's just shy of a 10% gain in power !!!

I unfortunatly cannot see grams/cyl now because there is no MAF reading to derive that number from so I can't give you an actual airflow gain....but I CAN tell you that it pulls MUCH harder from 2800 rpm on up to the shift at 6000 than it EVER did before

I'm running a screened 85mm MAF (stock 6.0)....I'm absolutely stunned that it it's that much of a restriction on a baby-cammed 6.0, I can only imagine how bad it's got to be on guys running 224's and bigger. I'm considering a 235/239 .575 lift cam....trying to run that through the MAF would be pointless !!

 

Why not just wire a new IAT sensor into the tract somewhere. I did that to mine to get a better reading of the cooling effect of the meth injection and eliminate timing pull due to high IATs.

 

I'm working on that...I ordered a '99 Corvette IAT sensor that I'll wire in as soon as it gets here and rid myself of the MAF completely

 

Interesting, might have to try that this weekend.
I'm also running in SD right now w/ the stock MAF in place.

I am going to go this route someday.

 

Yelo, I replied on tech too, but here it is again.

You can pull the sensor out of the maf with a pair of needle nose pliers. Then just drill a small hole and install the sensor wherever you want. I put mine just infront of my TB so that it would read the temp after my meth injection. I have an aluminum tube, so I used JB Weld. It isn't the neatest way, but it worked pretty well.

 

very interesting.

 

Best place for a MAF if you're running SD is in the garabage can

 

Or you could do this if you want to retain that "MAF still there" look...

 

did your timing change any?

which other tables reference the maf sensor that may have been affected?

 

Nothing changed except my trims which went positive due to the increased airflow....I'm running SD so the MAF is disabled, all I did was change it's location to OUTSIDE the air-tract