Cylinder Airmass & BRAF

[LS ROB]

Guys, I don't know much about BRAF effects on Cylinder Airmass. However, I noticed that when I let off the gas in 3rd or 4th gear at 1600-1800 rpm, that the car would go into DFCO rather quickly. I logged Cylinder Airmass and made an adjustment. Either I must have gotten lucky or the cold air had an effect on it; because according to the screen grab, It increased the airmass in the .20 row @ 1600-2000rpm. I checked prior logs and the airmass in that area was .19-.19x. So, does BRAF have an effect on Airmass or is this coincidental?

airmass.jpg

driveability (631-582) 1.1.hpt

after 4link adj..hpl

What I'm playing with:

Ls7 converted to wetsump
Stock Heads milled .020, ported and reworked by AHP.
1&7/8 LT's
MSD Intake-cleaned up by myself
TSP stage 2 cam .635/.635 234/[email protected] 115+3
Johnson 2116 LSR lifters
68 Camaro
T56 Magnum
Ford 9" 3.70

[GHuggins]

BRAF affects cylinder airmass only in regards to how much the throttle plate closes at those specific rpm intervals. Lower values = more engine braking or a more closed throttle plate which then in turn = lower cylinder airmass. At least that's how it is in the majority of cases.

You can also adjust your "brake" setting to control how much the plate closes.

[LS ROB]

Thanks Greg; Appreciate the info.