Supercharged111
Truly Awesome
- Joined
- Aug 20, 2015
- Messages
- 12,895
- Reaction score
- 15,859
That's interesting about your 1500.. I assume injector data and all that are correct?
And you might be right in theory about it being very close to correct as long as the intake tract stay the same. I was thinking any engine change would affect it but yeah I guess it really shouldn't. Really just diameter changes should drastically change the curve right?
That said, the couple stock trucks that I have tuned did require some adjustment, but its probably more likely that they needed it due to fuel pressure being slightly different than factory rather than the maf curve being wrong.
So if we want to use the maf to compare engines, and the intake is stock we should use the factory curve. If the maf has been tuned to dial in fueling then the airflow readings can only be trusted if you are 100% sure the IFR matches exactly what is happening real world, which is tough to guarantee. Aside from engine comparisons though, I would still recommend tuning the maf so the AFR is on point. @Supercharged111 you agree with that?
So pretty much exactly opposite what I posted initially, aorrs for the misinformation.
So way way back to the op question, do uou know if blackbear adjusts the maf curve at all?
I suspect IFR is off for me despite using a calculator to determine flow. I was able to use ASA LS1 injector data with one caveat: it runs at 4 bar and my truck has a 3.5 bar regulator. The other thing is I started with MAF data for a van and it's a known fact that that is different from what's in the black box for the trucks. Unfortunately, the data points are different so one cannot simply copy/paste it all in. This is just the way it goes with the 411 swap.