[dyllan12]

I've always been confuse with these numbers on the MHD gauge we have Lambda Bank 1 and 2 AFR

I'm currently on custom tune with wedge performance e50 map

but

When doing pulls what numbers are Rich/Lean or normal dealing with AFR

[stewbets]

Originally Posted by dyllan12

I've always been confuse with these numbers on the MHD gauge we have Lambda Bank 1 and 2 AFR

I'm currently on custom tune with wedge performance e50 map

but

When doing pulls what numbers are Rich/Lean or normal dealing with AFR

The lower the number, the richer the mix. 14.7 is stoich, but you don't want to be there when you're WOT (only while cruising and idling). You want to be richer. My e50 tune targets 12.45 at maximum load in the upper RPM range and around 13 in the midrange. Some ethanol tunes are a little richer than this. A 93 octane tune is going to be richer than this for sure. You want both banks to mirror each other pretty closely.

[dyllan12]

Originally Posted by stewbets

The lower the number, the richer the mix. 14.7 is stoich, but you don't want to be there when you're WOT (only while cruising and idling). You want to be richer. My e50 tune targets 12.45 at maximum load in the upper RPM range and around 13 in the midrange. Some ethanol tunes are a little richer than this. A 93 octane tune is going to be richer than this for sure. You want both banks to mirror each other pretty closely.

Thank you

[Dave92N54]

Originally Posted by stewbets

The lower the number, the richer the mix. 14.7 is stoich, but you don't want to be there when you're WOT (only while cruising and idling). You want to be richer. My e50 tune targets 12.45 at maximum load in the upper RPM range and around 13 in the midrange. Some ethanol tunes are a little richer than this. A 93 octane tune is going to be richer than this for sure. You want both banks to mirror each other pretty closely.

+1.

My V7.1 Stage 1+ 93 car is typically 11.9 at WOT, some may see low 12s or high 11s though, either is normal.