Why is my air flow so low?

[xcelr8n]

Alright Ive completed a set of mods over the last couple days to replace my stock fuel/14b.
I upgraded to 190lph walbro, fic 650s, and evo3 16g, crushed 1g bov...
I had the evo at 10 psi for a while and decided after 2 days I needed to tune for more boost... I have it set currently to 17psi, holds strong and pulls strong to redline, spools 17psi, by about 3200 rpms...
Logging it tonight, and I have high timing, like 22-24 degrees advanced, and my airflow isnt even maxing out, I used to be able to max out the loggers read out with the old 14b at 17-18psi.
Car feels pretty strong but at 17psi around 6000+ im only flowing 14-1500 hz..
Any thoughts? Tuning with 650s is alot different than playing around with a 14b and 450s thats forsure...

Oh ya, did a boost leak test, unfortunately only with a bike pump, but it made about 12psi, (woulda made more but my arms got sore after 20ish pumps), and held it there for a good 20-30 seconds before getting back to 0.

 

[steve]

Keep in mind that when using a SAFC or MAFT to correct for larger injectors, you do so my lowering the MAF counts to the ECU by the percentage correction. So with 650s you might be dropping the reported Hz by 30%. That makes that 1500Hz more like 1950Hz. That's also the reason for the additional timing.

Steve

 

[xcelr8n]

FWIW, my base injector setting is 560cc right now, and WOT is leaned out 15%....

If thats the case than, would that mean when my dsmchip arrives with 650s setup, and double hz count readout, I will see 100% accurate airflow numbers, since maf-t will be set back to 450s?
Thanks
ps. Is there a general conversion to find out lb/min from hz.

 

[Burnett03]

FWIW, my base injector setting is 560cc right now, and WOT is leaned out 15%....

If thats the case than, would that mean when my dsmchip arrives with 650s setup, and double hz count readout, I will see 100% accurate airflow numbers, since maf-t will be set back to 450s?
Thanks
ps. Is there a general conversion to find out lb/min from hz.

1) Being leaned on on the maft will show lower numbers, also if you have the fuel cut feature on it will only read so high and stop
2) yes, the chip will allow you to see the true airflow. But if you get the double karmen feature you must multiply the number you see by 2 to get the correct readout
3) No there is no general way to convert karmen to lbs..

 

[steve]

If thats the case than, would that mean when my dsmchip arrives with 650s setup, and double hz count readout, I will see 100% accurate airflow numbers, since maf-t will be set back to 450s

You'll see half of what the MAFT is feeding the ECU (unless you use logger software that doubles the numbers) but that may or may not be %100 accurate airflow. They will be as accurate as the MAFT is capable of generating.

I think this version of MMCd tries to display mass airflow.
http://www.ecimulti.org/mmcd/

Steve