6.0 Truck Norris cam tuing. a starting point

[TheMechanic]

Download ATG Calculator for your phone. Gives a good idea what g/s should be

[Fast4.7]

Perhaps I'm not making myself clear, or possibly a reading comprehension issue is occurring here.

I ran a datalog with the maf enabled, I was concerned with the accuracy of the MAF reading.
I then switched over to speed density to tune the VE table.
nobody has addressed the original question about the MAF values.

a factory-enclosed MAF sensor should not need substantial changes to a factory MAF calibration. And should have a very precise readout.

at this point, in speed density, long-term trims are within 2% across the board so AFRs are much better, and WOT is pretty solid at 12.7-13.0. not perfect, but certainly better.

i have yet to re-enable the maf

You are wrong on the enclosed MAF not needing substantial changes to the factory calibration if it is not in the factory air ducting. I know of an OEM application with a closed maf that merely removing the air cleaner from the housing will practically stall the engine it runs so lean.

[TheMechanic]

You are wrong on the enclosed MAF not needing substantial changes to the factory calibration if it is not in the factory air ducting. I know of an OEM application with a closed maf that merely removing the air cleaner from the housing will practically stall the engine it runs so lean.

I agree. The laminar flow is critical. Best bet is to use Airflow Straighteners in front of a behind MAF.

http://www.saxonpc.com/airflow-products.html

[LongRoof81]

Hi All
I'm just a noob to EFI tuning but I'm also running a 6.0. At this point no cam yet but a sheet metal manifold,
stock TB, custom CAI and long tube headers. This is in a race car and my logs show about 32 lb/min air flow.
I think with the stock manifold and the cam you are possibly in the ball park on air flow.

As I said I am a beginner at tuning so please don't flame me for my .02 worth

[TheMechanic]

Hi All
I'm just a noob to EFI tuning but I'm also running a 6.0. At this point no cam yet but a sheet metal manifold,
stock TB, custom CAI and long tube headers. This is in a race car and my logs show about 32 lb/min air flow.
I think with the stock manifold and the cam you are possibly in the ball park on air flow.

As I said I am a beginner at tuning so please don't flame me for my .02 worth

32lbs per min is 241 g/sec. at at approx full load that would be 4.600 rpm at 89% eff. When exactly are you getting that much flow? Certainly not at an idle unless you have a 32 liter motor.

[kevin87turbot]

32lbs per min is 241 g/sec. at at approx full load that would be 4.600 rpm at 89% eff. When exactly are you getting that much flow? Certainly not at an idle unless you have a 32 liter motor.

He's referencing the original post. The OP mentioned that his application was approaching 30-31 lbs/min at WOT in the upper rpm range. That seems to be a reasonable number for these applications.

[bk2life]

Hey guys, thanks for the help on the last thread!
At WOT at 5000-6000RPM, the maf is reading in the 30-31 LB/Min range. !

gen 3 5.3 truck intake, same cam, long tubes, at 5700 rpm it's pulling 33.70 lb/min.
hope that helps.

[LongRoof81]

32lbs per min is 241 g/sec. at at approx full load that would be 4.600 rpm at 89% eff. When exactly are you getting that much flow? Certainly not at an idle unless you have a 32 liter motor.

If I'm totally accurate the air flow is 240.5 g/sec (31.8 lb/min) this is at 5400 RPM.
I don't think a 32 liter motor would fit in my car but it would look impressive